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Jiang L, Xiang S, Ji X, Lei J, Li D, Li S, Xiao L, Jiang L, Zhao L, Wang Y. Design of a double-layered material as a long-acting moisturizing hydrogel-elastomer and its application in the field protection of elephant ivories excavated from the Sanxingdui Ruins. RSC Adv 2024; 14:24845-24855. [PMID: 39119283 PMCID: PMC11307256 DOI: 10.1039/d4ra03919j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Accepted: 07/18/2024] [Indexed: 08/10/2024] Open
Abstract
The sudden change in the environment from a dark, low-oxygen, low-temperature, high-humidity underground stable environment to an environment with much-improved temperature and humidity, a high oxygen content, enhanced light exposure, and increased harmful organisms has greatly affected the stability of the ivory unearthed from the Sanxingdui site. Therefore, the implementation of an effective emergency protection strategy for ivory excavated at Sanxingdui is imperative and urgently needed. However, the current gauze technique used at many archaeological sites suffers from short timescales, poor transparency of the material, and susceptibility to reverse osmosis of the ivory. Therefore, in this study, a transparent poly(acrylamide-acrylic acid) (P(AM-AA)) hydrogel-poly(dimethylsiloxane) (PDMS) elastomer bilayer was designed for the effective protection of excavated ivory. In this system, a hydrophobic PDMS elastomer was constructed on the surface of the hydrogel by the introduction of a silane coupling agent to inhibit the loss of water from the hydrogel to the external environment, thus prolonging the preservation of ivory by the protective material. The covalent interface between the hydrogel and the elastomer allowed the double-layer composite to exhibit excellent interfacial bonding. In addition, the double-layer material demonstrated a high mechanical strength of 1.2 MPa and a water binding ratio of ∼31%, which allowed it to form strong hydrogen bonds with the silanol structure. When the hydrogel was placed in an air environment (temperature: 25 °C; relative humidity: 65% RH), the water-retention rate of the double-layer material was still more than 60% after 5 days, thus the double-layer material showed excellent performance. Meanwhile, the double-layer material had a transmittance of more than 90% and exhibited a high degree of transparency, which makes it possible to promptly observe the changes occurring on the surface of the ivory. The combination of the aforementioned properties makes the bilayer a promising material for moisturizing and protecting excavated ivory in situ. Based on these properties, we used the prepared P(AM-AA)/PDMS double-layer material directly for wrapping the K8 ivory with the highest water content at Sanxingdui. The weight retention rate of the ivory was around 70% after 50 days of placement (temperature: 25 °C; relative humidity: 60% RH), the macroscopic morphology did not change significantly and the mechanical properties of the wrapped ivory were basically unchanged, which indicated that the double-layer material has an excellent on-site protection effect on the ivory excavated from Sanxingdui. This work provides new ideas and methods for the temporary conservation of wet heritage.
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Affiliation(s)
- Lang Jiang
- College of Chemistry and Materials Science, Sichuan Normal University Chengdu 610068 China
| | - Shilin Xiang
- College of Chemistry and Materials Science, Sichuan Normal University Chengdu 610068 China
| | - Xiaoying Ji
- Cigar Fermentation Technology Key Laboratory of China Tobacco, Industrial Efficient Utilization of Domestic Cigar Tobacco Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd Chengdu 610066 China
| | - Jinshan Lei
- Cigar Fermentation Technology Key Laboratory of China Tobacco, Industrial Efficient Utilization of Domestic Cigar Tobacco Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd Chengdu 610066 China
| | - Dongliang Li
- Cigar Fermentation Technology Key Laboratory of China Tobacco, Industrial Efficient Utilization of Domestic Cigar Tobacco Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd Chengdu 610066 China
| | - Sifan Li
- Sichuan Province Institute of Cultural Relics and Archeology Chengdu 610041 China
| | - Lin Xiao
- Chengdu Institute of Cultural Relics and Archaeology Chengdu 610072 China
| | - Luman Jiang
- Chengdu Institute of Cultural Relics and Archaeology Chengdu 610072 China
| | - Lijuan Zhao
- College of Chemistry and Materials Science, Sichuan Normal University Chengdu 610068 China
| | - Yi Wang
- College of Chemistry and Materials Science, Sichuan Normal University Chengdu 610068 China
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2
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Yan Y, Wei L, Shao J, Qiu X, Zhang X, Cui X, Huang J, Ge S. A Near-Infrared Photothermal-Responsive Underwater Adhesive with Tough Adhesion and Antibacterial Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310870. [PMID: 38453669 DOI: 10.1002/smll.202310870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/24/2024] [Indexed: 03/09/2024]
Abstract
Developing tunable underwater adhesives that possess tough adhesion in service and easy detachment when required remains challenging. Herein, a strategy is proposed to design a near infrared (NIR) photothermal-responsive underwater adhesive by incorporating MXene (Ti3C2Tx)-based nanoparticles within isocyanate-modified polydimethylsiloxane (PDMS) polymer chains. The developed adhesive exhibits long-term and tough adhesion with an underwater adhesion strength reaching 5.478 MPa. Such strong adhesion is mainly attributed to the covalent bonds and hydrogen bonds at the adhesive-substrate interface. By making use of the photothermal-response of MXene-based nanoparticles and the thermal response of PDMS-based chains, the adhesive possesses photothermal-responsive performance, exhibiting sharply diminished adhesion under NIR irradiation. Such NIR-triggered tunable adhesion allows for easy and active detachment of the adhesive when needed. Moreover, the underwater adhesive exhibits photothermal antibacterial property, making it highly desirable for underwater applications. This work enhances the understanding of photothermal-responsive underwater adhesion, enabling the design of tunable underwater adhesives for biomedical and engineering applications.
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Affiliation(s)
- Yonggan Yan
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
| | - Luxing Wei
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, China
| | - Jinlong Shao
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaoyong Qiu
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Xiaolai Zhang
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Xin Cui
- Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing, 100071, China
| | - Jun Huang
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, China
| | - Shaohua Ge
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
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Eluu SC, Obayemi JD, Yiporo D, Salifu AA, Oko AO, Onwudiwe K, Aina T, Oparah JC, Ezeala CC, Etinosa PO, Osafo SA, Ugwu MC, Esimone CO, Soboyejo WO. Luteinizing Hormone-Releasing Hormone (LHRH)-Conjugated Cancer Drug Delivery from Magnetite Nanoparticle-Modified Microporous Poly-Di-Methyl-Siloxane (PDMS) Systems for the Targeted Treatment of Triple Negative Breast Cancer Cells. J Funct Biomater 2024; 15:209. [PMID: 39194647 DOI: 10.3390/jfb15080209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 08/29/2024] Open
Abstract
This study presents LHRH conjugated drug delivery via a magnetite nanoparticle-modified microporous Poly-Di-Methyl-Siloxane (PDMS) system for the targeted suppression of triple-negative breast cancer cells. First, the MNP-modified PDMS devices are fabricated before loading with targeted and untargeted cancer drugs. The release kinetics from the devices are then studied before fitting the results to the Korsmeyer-Peppas model. Cell viability and cytotoxicity assessments are then presented using results from the Alamar blue assay. Apoptosis induction is then elucidated using flow cytometry. The in vitro drug release studies demonstrated a sustained and controlled release of unconjugated drugs (Prodigiosin and paclitaxel) and conjugated drugs [LHRH conjugated paclitaxel (PTX+LHRH) and LHRH-conjugated prodigiosin (PG+LHRH)] from the magnetite nanoparticle modified microporous PDMS devices for 30 days at 37 °C, 41 °C, and 44 °C. At 24, 48, 72, and 96 h, the groups loaded with conjugated drugs (PG+LHRH and PTX+LHRH) had a significantly higher (p < 0.05) percentage cell growth inhibition than the groups loaded with unconjugated drugs (PG and PTX). Additionally, throughout the study, the MNP+PDMS (without drug) group exhibited a steady rise in the percentage of cell growth inhibition. The flow cytometry results revealed a high incidence of early and late-stage apoptosis. The implications of the results are discussed for the development of biomedical devices for the localized and targeted release of cancer drugs that can prevent cancer recurrence following tumor resection.
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Affiliation(s)
- Stanley C Eluu
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka 420110, Nigeria
- Department of Biotechnology, Ebonyi State University, Abakaliki 480101, Nigeria
| | - John D Obayemi
- Department of Mechanical and Material Science Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA 01609, USA
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Gateway Park Life Sciences and Bioengineering Centre, 60 Prescott Street, Worcester, MA 01609, USA
| | - Danyuo Yiporo
- Department of Mechanical Engineering, Ashesi University, Berekuso PMB CT3, Ghana
- Department of Mechanical Engineering, Academic City University College, Haatso-Accra P.O. Box AD 421, Ghana
| | - Ali A Salifu
- Department of Engineering, Morrissey College of Arts and Science, Boston College, Chestnut Hill, MA 02467, USA
| | - Augustine O Oko
- Department of Biotechnology, Ebonyi State University, Abakaliki 480101, Nigeria
- Department of Biology and Biotechnology, David Umahi Federal University of Health Sciences, Uburu 480101, Nigeria
| | - Killian Onwudiwe
- Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Toyin Aina
- Department of Biomedical Engineering, Collage of Engineering, Afe Babalola University, KM 8.5 Afe Babalola Way, Ado-Ekiti 360001, Nigeria
| | - Josephine C Oparah
- Department of Material Science, African University of Science and Technology, Km 10 Airport Road, Abuja 900107, Nigeria
| | - Chukwudi C Ezeala
- Department of Material Science, African University of Science and Technology, Km 10 Airport Road, Abuja 900107, Nigeria
- Department of Biotechnology, Worcester State University, Worcester, MA 01602, USA
| | - Precious O Etinosa
- Department of Mechanical and Material Science Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA 01609, USA
| | - Sarah A Osafo
- Department of Material Science and Engineering, University of Ghana, Legon, Accra P.O. Box LG 1181, Ghana
- Biomaterial Science Department, Dental School, College of Health Sciences, University of Ghana, Korle bu, Accra P.O. Box KB 52, Ghana
| | - Malachy C Ugwu
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka 420110, Nigeria
| | - Charles O Esimone
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka 420110, Nigeria
| | - Winston O Soboyejo
- Department of Mechanical and Material Science Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA 01609, USA
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Gateway Park Life Sciences and Bioengineering Centre, 60 Prescott Street, Worcester, MA 01609, USA
- Department of Engineering, SUNY Polytechnic Institute,100 Seymour Rd, Utica, NY 13502, USA
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Rajanna Ambika M, Kuttukaran SS, Nagaiah N, Melavanki R, Shashi Kumar SK, Kumar Suman S. Multifiller-based polymer composites for shielding high energy ionising radiation. RADIATION PROTECTION DOSIMETRY 2024; 200:1178-1182. [PMID: 39016485 DOI: 10.1093/rpd/ncae010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/22/2023] [Accepted: 01/14/2024] [Indexed: 07/18/2024]
Abstract
Polydimethyl silicone rubber-based polymer composites filled with molybdenum and bismuth were fabricated using simple open mold cast technique. The physical and chemical structure and gamma shielding parameters like attenuation coefficient, half-value layer (HVL) thickness and relaxation length have been investigated for the said novel materials using X-ray diffraction (XRD), Fourier transform Infrared spectroscopy (FTIR) and gamma ray spectrometer. XRD study reveals the crystalline nature of the composites. It is evident from FTIR studies that there is no chemical interaction between the polymer matrix and filler particles. The results of attenuation studies reveal that the linear attenuation coefficient increases with addition of Bi and Mo and is found to be 0.653, 1.341 and 1.017, 1.793 and 0.102, 0.152 cm-1 for 1MMB and 2MMB polymer composites at 80, 356 and 662 keV gamma rays, respectively. The HVL thickness of the materials is found to be 1.06, 0.51 and 0.68, 0.38 and 6.73, 4.532 cm for 1MMB (20Mo + 10Bi phr) and 2MMB (40Mo + 20Bi phr) at these energies, respectively. The mass attenuation coefficient of the novel composites 1MMB and 2MMB is found to be higher than the conventional materials like lead and barite for 356 keV gamma rays. In addition, the material is found to be light weight and flexible enabling to be molded in required forms, thus being a substitute for the material lead that is known to be heavy and toxic by nature.
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Affiliation(s)
| | - Sherry S Kuttukaran
- Department of Physics, MS Ramaiah Institute of Technology, Bengaluru 560054, India
| | - Ningaiah Nagaiah
- Department of Physics, Bangalore University, JB Campus, Bengaluru 560056, India
| | - Raveendra Melavanki
- Department of Physics, MS Ramaiah Institute of Technology, Bengaluru 560054, India
| | | | - Santosh Kumar Suman
- Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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Sahraeeazartamar F, Terryn S, Sangma RN, Krack M, Peeters R, Van den Brande N, Deferme W, Vanderborght B, Van Assche G, Brancart J. Diels-Alder Network Blends as Self-Healing Encapsulants for Liquid Metal-Based Stretchable Electronics. ACS APPLIED MATERIALS & INTERFACES 2024; 16:34192-34212. [PMID: 38915136 DOI: 10.1021/acsami.4c07129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Two dynamic covalent networks based on the Diels-Alder reaction were blended to exploit the properties of the dissimilar polymer backbones. Furan-functionalized polyether amines based on poly(propylene oxide) (PPO) FD4000 and polydimethylsiloxane (PDMS) FS5000 were mixed in a common solvent and reversibly cross-linked with the same bismaleimide DPBM. The morphology of the phase-separated blends is primarily controlled by the concentration of backbones. Increasing the PDMS content of the blends results in a dilute droplet morphology at 25 wt %, with a growing size and concentration of droplets and the formation of two separate PPO- and PDMS-rich layers at 50 wt %. Further increasing the PDMS content to 75 wt % leads to larger droplets and a thicker layer of the secondary phase. The hydrophobic PDMS phase creates a barrier against water, while the more hydrophilic PPO phase enhances the resistance against oxygen diffusion. Lowering the maleimide-to-furan stoichiometric ratio resulted in a decrease in cross-link density and thus more flexible and stretchable encapsulants. Changes in the stoichiometric ratio also affected the phase morphology due to resulting changes in phase separation and network formation kinetics. Lowering the stoichiometric ratio also resulted in enhanced self-healing properties of 96% at room temperature as a consequence of the increased chain mobility in the blended networks. The self-healing blends were used to encapsulate liquid metal circuits to create stretchable strain sensors with a linear electro-mechanical response without much drift or hysteresis, which could be efficiently recovered by 90% after the damage-healing cycles.
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Affiliation(s)
- Fatemeh Sahraeeazartamar
- Lab of Physical Chemistry and Polymer Science (FYSC), Sustainable Materials Engineering Research Group (SUME), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Seppe Terryn
- Brubotics, Department of Mechanical Engineering, Vrije Universiteit Brussel and IMEC, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Rathul Nengminza Sangma
- Brubotics, Department of Mechanical Engineering, Vrije Universiteit Brussel and IMEC, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Maximilian Krack
- Institute for Materials Research (IMO) and IMEC (IMO-IMOMEC), Hasselt University, Wetenschapspark 1, 3590 Diepenbeek, Belgium
| | - Roos Peeters
- Materials and Packaging Research & Services (MPR&S), Institute for Materials Research (IMO-IMOMEC), Hasselt University, Wetenschapspark 27, 3590 Diepenbeek, Belgium
| | - Niko Van den Brande
- Lab of Physical Chemistry and Polymer Science (FYSC), Sustainable Materials Engineering Research Group (SUME), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Wim Deferme
- Institute for Materials Research (IMO) and IMEC (IMO-IMOMEC), Hasselt University, Wetenschapspark 1, 3590 Diepenbeek, Belgium
| | - Bram Vanderborght
- Brubotics, Department of Mechanical Engineering, Vrije Universiteit Brussel and IMEC, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Guy Van Assche
- Lab of Physical Chemistry and Polymer Science (FYSC), Sustainable Materials Engineering Research Group (SUME), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Joost Brancart
- Lab of Physical Chemistry and Polymer Science (FYSC), Sustainable Materials Engineering Research Group (SUME), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
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Takuma M, Fujita H, Zushi N, Nagano H, Azuma R, Kiyosawa T, Fujie T. An intrinsically semi-permeable PDMS nanosheet encapsulating adipose tissue-derived stem cells for enhanced angiogenesis. Biomater Sci 2024; 12:3401-3410. [PMID: 38804980 DOI: 10.1039/d4bm00460d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Cell encapsulation devices are expected to be promising tools that can control the release of therapeutic proteins secreted from transplanted cells. The protein permeability of the device membrane is important because it allows the isolation of transplanted cells while enabling the effectiveness of the device. In this study, we investigated free-standing polymeric ultra-thin films (nanosheets) as an intrinsically semi-permeable membrane made from polydimethylsiloxane (PDMS). The PDMS nanosheet with a thickness of 600 nm showed intrinsic protein permeability, and the device fabricated with the PDMS nanosheet showed that VEGF secreted from implanted adipose tissue-derived stem cells (ASCs) could be released for at least 5 days. The ASC encapsulation device promoted angiogenesis and the development of granulation tissue 1 week after transplantation to the subcutaneous area of a mouse. This cell encapsulation device consisting of PDMS nanosheets provides a new method for pre-vascularization of the subcutaneous area in cell transplantation therapy.
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Affiliation(s)
- Megumi Takuma
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
| | - Hajime Fujita
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
| | - Nanami Zushi
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
| | - Hisato Nagano
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama 359-8513, Japan
| | - Ryuichi Azuma
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama 359-8513, Japan
| | - Tomoharu Kiyosawa
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama 359-8513, Japan
| | - Toshinori Fujie
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
- Research Center for Autonomous Systems Materialogy (ASMat), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
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7
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Ahmad M, Patel R, Lee DT, Corkery P, Kraetz A, Prerna, Tenney SA, Nykypanchuk D, Tong X, Siepmann JI, Tsapatsis M, Boscoboinik JA. ZIF-8 Vibrational Spectra: Peak Assignments and Defect Signals. ACS APPLIED MATERIALS & INTERFACES 2024; 16:27887-27897. [PMID: 38753657 DOI: 10.1021/acsami.4c02396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Zeolitic imidazolate framework (ZIF-8) is a promising material for gas separation applications. It also serves as a prototype for numerous ZIFs, including amorphous ones, with a broader range of possible applications, including sensors, catalysis, and lithography. It consists of zinc coordinated with 2-methylimidazolate (2mIm) and has been synthesized with methods ranging from liquid-phase to solvent-free synthesis, which aim to control its crystal size and shape, film thickness and microstructure, and incorporation into nanocomposites. Depending on the synthesis method and postsynthesis treatments, ZIF-8 materials may deviate from the nominal defect-free ZIF-8 crystal structure due to defects like missing 2mIm, missing zinc, and physically adsorbed 2mIm trapped in the ZIF-8 pores, which may alter its performance and stability. Infrared (IR) spectroscopy has been used to assess the presence of defects in ZIF-8 and related materials. However, conflicting interpretations by various authors persist in the literature. Here, we systematically investigate ZIF-8 vibrational spectra by combining experimental IR spectroscopy and first-principles molecular dynamics simulations, focusing on assigning peaks and elucidating the spectroscopic signals of putative defects present in the ZIF-8 material. We attempt to resolve conflicting assignments from the literature and to provide a comprehensive understanding of the vibrational spectra of ZIF-8 and its defect-induced variations, aiming toward more precise quality control and design of ZIF-8-based materials for emerging applications.
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Affiliation(s)
- Mueed Ahmad
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-0701, United States
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Roshan Patel
- Department of Chemistry and Chemical Theory Center, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455-0132, United States
| | - Dennis T Lee
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-0701, United States
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218-2625, United States
| | - Peter Corkery
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218-2625, United States
| | - Andrea Kraetz
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218-2625, United States
| | - Prerna
- Department of Chemistry and Chemical Theory Center, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455-0132, United States
| | - Samuel A Tenney
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Dmytro Nykypanchuk
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - J Ilja Siepmann
- Department of Chemistry and Chemical Theory Center, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455-0132, United States
| | - Michael Tsapatsis
- Department of Chemical and Biomolecular Engineering & Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218-2625, United States
- Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland 20723, United States
| | - J Anibal Boscoboinik
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794-0701, United States
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
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8
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Iqbal R, Matsumoto A, Shen AQ, Sen AK. Understanding the Role of Loss Modulus of Viscoelastic Substrates in the Evaporation Dynamics of Sessile Drops. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10035-10043. [PMID: 38687988 DOI: 10.1021/acs.langmuir.4c00191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Viscoelastic properties of soft substrates play a crucial role in the evaporation dynamics of sessile drops. Recent studies have revealed that the modification of the viscoelastic properties of substrates changes the dynamics of the three-phase contact line, consequently affecting the evaporation behavior of sessile drops. Notably, these modifications occur without any noticeable changes to the substrate's wetting characteristics or surface topography. However, the individual role of storage (G') and loss (G″) moduli of substrates on drop evaporation dynamics remains unexplored. In this study, we investigate the evaporation dynamics of water drops on two groups of poly(dimethylsiloxane)-based viscoelastic substrates possessing either identical G' with varying G″ or identical G″ with varying G'. Our study reveals that on a substrate with constant shear modulus (G'), a reduction of an order of magnitude in loss modulus shifts the evaporation process from the constant contact radius mode to the constant contact angle mode. We hypothesize that this observed shift in behavior stems from the varying viscoelastic dissipation influenced by the plateau modulus and characteristic relaxation time of polymer gels. Our hypothesis is further supported from the observation that the evaporation process persists on the substrate with constant loss modulus (G″). Our study advances the current understanding of drop evaporation on soft substrates that may find potential applications involving soft composites, biological entities, tissue engineering, and wearable electronics.
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Affiliation(s)
- Rameez Iqbal
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
- Micro-Nano-Biofluidics Unit, Indian Institute of Technology Madras, Chennai 600036, India
| | - Atsushi Matsumoto
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Ashis K Sen
- Micro-Nano-Biofluidics Unit, Indian Institute of Technology Madras, Chennai 600036, India
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9
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Zlotnick HM, Stevens MM, Mauck RL. Physical-property-based patterning: simply engineering complex tissues. Trends Biotechnol 2024:S0167-7799(24)00068-4. [PMID: 38664141 DOI: 10.1016/j.tibtech.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 08/09/2024]
Abstract
The field of biofabrication is rapidly expanding with the advent of new technologies and material systems to engineer complex tissues. In this opinion article, we introduce an emerging tissue patterning method, physical-property-based patterning, that has strong translational potential given its simplicity and limited dependence on external hardware. Physical-property-based patterning relies solely on the intrinsic density, magnetic susceptibility, or compressibility of an object, its surrounding solution, and the noncontact application of a remote field. We discuss how physical properties can be exploited to pattern objects and design a variety of biologic tissues. Finally, we pose several open questions that, if addressed, could transform the status quo of biofabrication, pushing us one step closer to patterning tissues in situ.
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Affiliation(s)
- Hannah M Zlotnick
- BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering, and Institute for Biomedical Engineering, Imperial College London, London, UK; Department of Physiology, Anatomy and Genetics, Department of Engineering Science, and Kavli Institute for Nanoscience Discovery, University of Oxford, UK
| | - Robert L Mauck
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA; Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA.
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10
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Hamdani SS, Elkholy HM, Alford A, Jackson K, Naveed M, Wyman I, Wang Y, Li K, Haider SW, Rabnawaz M. Synthesis of Water-Dispersible Poly(dimethylsiloxane) and Its Potential Application in the Paper Coating Industry as an Alternative for PFAS-Coated Paper and Single-Use Plastics. Polymers (Basel) 2024; 16:1006. [PMID: 38611264 PMCID: PMC11014279 DOI: 10.3390/polym16071006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 03/18/2024] [Accepted: 04/01/2024] [Indexed: 04/14/2024] Open
Abstract
Polyethylene-, polyvinylidene chloride-, and per- and polyfluoroalkyl substance-coated paper generate microplastics or fluorochemicals in the environment. Here, we report an approach for the development of oil-resistant papers using an environmentally friendly, fluorine-free, water-dispersible poly(dimethylsiloxane) (PDMS) coating on kraft paper. Carboxylic-functionalized PDMS (PDMS-COOH) was synthesized and subsequently neutralized with ammonium bicarbonate to obtain a waterborne emulsion, which was then coated onto kraft paper. The water resistance of the coated paper was determined via Cobb60 measurements. The Cobb60 value was reduced to 2.70 ± 0.14 g/m2 as compared to 87.6 ± 5.1 g/m2 for uncoated paper, suggesting a remarkable improvement in water resistance. Similarly, oil resistance was found to be 12/12 on the kit test scale versus 0/12 for uncoated paper. In addition, the coated paper retained 70-90% of its inherent mechanical properties, and more importantly, the coated paper was recycled via pulp recovery using a standard protocol with a 91.1% yield.
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Affiliation(s)
- Syeda Shamila Hamdani
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Hazem M. Elkholy
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Alexandra Alford
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Kang Jackson
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Muhammad Naveed
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Ian Wyman
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
| | - Yun Wang
- Department of Chemical and Paper Engineering, Western Michigan University, 1903 W, Michigan Avenue, Kalamazoo, MI 49008, USA
| | - Kecheng Li
- Department of Chemical and Paper Engineering, Western Michigan University, 1903 W, Michigan Avenue, Kalamazoo, MI 49008, USA
| | - Syed W. Haider
- Department of Civil & Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Muhammad Rabnawaz
- School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824, USA; (S.S.H.); (H.M.E.)
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11
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Guimaraes APP, Calori IR, Stilhano RS, Tedesco AC. Renal proximal tubule-on-a-chip in PDMS: fabrication, functionalization, and RPTEC:HUVEC co-culture evaluation. Biofabrication 2024; 16:025024. [PMID: 38408383 DOI: 10.1088/1758-5090/ad2d2f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/26/2024] [Indexed: 02/28/2024]
Abstract
'On-a-chip' technology advances the development of physiologically relevant organ-mimicking architecture by integrating human cells into three-dimensional microfluidic devices. This method also establishes discrete functional units, faciliting focused research on specific organ components. In this study, we detail the development and assessment of a convoluted renal proximal tubule-on-a-chip (PT-on-a-chip). This platform involves co-culturing Renal Proximal Tubule Epithelial Cells (RPTEC) and Human Umbilical Vein Endothelial Cells (HUVEC) within a polydimethylsiloxane microfluidic device, crafted through a combination of 3D printing and molding techniques. Our PT-on-a-chip significantly reduced high glucose level, exhibited albumin uptake, and simulated tubulopathy induced by amphotericin B. Remarkably, the RPTEC:HUVEC co-culture exhibited efficient cell adhesion within 30 min on microchannels functionalized with plasma, 3-aminopropyltriethoxysilane, and type-I collagen. This approach significantly reduced the required incubation time for medium perfusion. In comparison, alternative methods such as plasma and plasma plus polyvinyl alcohol were only effective in promoting cell attachment to flat surfaces. The PT-on-a-chip holds great promise as a valuable tool for assessing the nephrotoxic potential of new drug candidates, enhancing our understanding of drug interactions with co-cultured renal cells, and reducing the need for animal experimentation, promoting the safe and ethical development of new pharmaceuticals.
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Affiliation(s)
- Ana Paula Pereira Guimaraes
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
| | - Italo Rodrigo Calori
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
- Pharmaceutical Engineering and 3D Printing (PharmE3D) Labs, Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, Oxford, MS 38677, United States of America
| | - Roberta Sessa Stilhano
- Department of Physiological Sciences, Santa Casa de Sao Paulo School of Medical Sciences, Sao Paulo, Brazil
| | - Antonio Claudio Tedesco
- Department of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine Research Group, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, São Paulo, Ribeirão Preto 14040-901, Brazil
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12
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Guo M, Tian S, Wang W, Xie L, Xu H, Huang K. Biomimetic leaves with immobilized catalase for machine learning-enabled validating fresh produce sanitation processes. Food Res Int 2024; 179:114028. [PMID: 38342546 DOI: 10.1016/j.foodres.2024.114028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 02/13/2024]
Abstract
Washing and sanitation are vital steps during the postharvest processing of fresh produce to reduce the microbial load on the produce surface. Although current process control and validation tools effectively predict sanitizer concentrations in wash water, they have significant limitations in assessing sanitizer effectiveness for reducing microbial counts on produce surfaces. These challenges highlight the urgent need to improve the validation of sanitation processes, especially considering the presence of dynamic organic contaminants and complex surface topographies. This study aims to provide the fresh produce industry with a novel, reliable, and highly accurate method for validating the sanitation efficacy on the produce surface. Our results demonstrate the feasibility of using a food-grade, catalase (CAT)-immobilized biomimetic leaf in combination with vibrational spectroscopy and machine learning to predict microbial inactivation on microgreen surfaces. This was tested using two sanitizers: sodium hypochlorite (NaClO) and hydrogen peroxide (H2O2). The developed CAT-immobilized leaf-replicated PDMS (CAT@L-PDMS) effectively mimics the microscale topographies and bacterial distribution on the leaf surface. Alterations in the FTIR spectra of CAT@L-PDMS, following simulated sanitation processes, indicate chemical changes due to CAT oxidation induced by NaClO or H2O2 treatments, facilitating the subsequent machine learning modeling. Among the five algorithms tested, the competitive adaptive reweighted sampling partial least squares discriminant analysis (CARS-PLSDA) algorithm was the most effective for classifying the inactivation efficacy of E. coli on microgreen leaf surfaces. It predicted bacterial reduction on microgreen surfaces with 100% accuracy in both training and prediction sets for NaClO, and 95% in the training set and 86% in the prediction set for H2O2. This approach can improve the validation of fresh produce sanitation processes and pave the way for future research.
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Affiliation(s)
- Minyue Guo
- School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand
| | - Shijie Tian
- School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Wen Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, MOA Laboratory of Quality & Safety Risk Assessment for Agro-Products (Hangzhou), Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Lijuan Xie
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Huirong Xu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Kang Huang
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA.
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13
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Eluu SC, Obayemi JD, Salifu AA, Yiporo D, Oko AO, Aina T, Oparah JC, Ezeala CC, Etinosa PO, Ugwu CM, Esimone CO, Soboyejo WO. In-vivo studies of targeted and localized cancer drug release from microporous poly-di-methyl-siloxane (PDMS) devices for the treatment of triple negative breast cancer. Sci Rep 2024; 14:31. [PMID: 38167999 PMCID: PMC10761815 DOI: 10.1038/s41598-023-50656-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024] Open
Abstract
Triple-negative breast cancer (TNBC) treatment is challenging and frequently characterized by an aggressive phenotype and low prognosis in comparison to other subtypes. This paper presents fabricated implantable drug-loaded microporous poly-di-methyl-siloxane (PDMS) devices for the delivery of targeted therapeutic agents [Luteinizing Hormone-Releasing Hormone conjugated paclitaxel (PTX-LHRH) and Luteinizing Hormone-Releasing Hormone conjugated prodigiosin (PG-LHRH)] for the treatment and possible prevention of triple-negative cancer recurrence. In vitro assessment using the Alamar blue assay demonstrated a significant reduction (p < 0.05) in percentage of cell growth in a time-dependent manner in the groups treated with PG, PG-LHRH, PTX, and PTX-LHRH. Subcutaneous triple-negative xenograft breast tumors were then induced in athymic female nude mice that were four weeks old. Two weeks later, the tumors were surgically but partially removed, and the device implanted. Mice were observed for tumor regrowth and organ toxicity. The animal study revealed that there was no tumor regrowth, six weeks post-treatment, when the LHRH targeted drugs (LHRH-PTX and LHRH-PGS) were used for the treatment. The possible cytotoxic effects of the released drugs on the liver, kidney, and lung are assessed using quantitative biochemical assay from blood samples of the treatment groups. Ex vivo histopathological results from organ tissues showed that the targeted cancer drugs released from the implantable drug-loaded device did not induce any adverse effect on the liver, kidneys, or lungs, based on the results of qualitative toxicity studies. The implications of the results are discussed for the targeted and localized treatment of triple negative breast cancer.
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Affiliation(s)
- S C Eluu
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka, 420110, Anambra State, Nigeria
| | - J D Obayemi
- Department of Mechanical Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA, 01609, USA
- Department of Biomedical Engineering, Gateway Park Life Sciences and Bioengineering Centre, Worcester Polytechnic Institute, 60 Prescott Street, Worcester, MA, 01609, USA
| | - A A Salifu
- Department of Engineering, Morrissey College of Arts and Science, Boston College, Boston, USA
| | - D Yiporo
- Department of Mechanical Engineering, Ashesi University, Berekuso, Ghana
| | - A O Oko
- Department of Biology and Biotechnology, David Umahi Federal, University of Health Sciences, Uburu, Nigeria
| | - T Aina
- Department of Material Science, African University of Science and Technology, Km 10 Airport Road, Abuja, Nigeria
| | - J C Oparah
- Department of Material Science, African University of Science and Technology, Km 10 Airport Road, Abuja, Nigeria
| | - C C Ezeala
- Department of Material Science, African University of Science and Technology, Km 10 Airport Road, Abuja, Nigeria
| | - P O Etinosa
- Department of Mechanical Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA, 01609, USA
| | - C M Ugwu
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka, 420110, Anambra State, Nigeria
| | - C O Esimone
- Department of Pharmaceutical Microbiology and Biotechnology, Nnamdi Azikiwe University, Ifite Awka, 420110, Anambra State, Nigeria
| | - W O Soboyejo
- Department of Mechanical Engineering, Higgins Lab, Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA, 01609, USA.
- Department of Biomedical Engineering, Gateway Park Life Sciences and Bioengineering Centre, Worcester Polytechnic Institute, 60 Prescott Street, Worcester, MA, 01609, USA.
- Department of Engineering, SUNY Polytechnic Institute, 100 Seymour Rd, Utica, NY, 13502, USA.
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14
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Porpora F, Dei L, Duncan TT, Olivadese F, London S, Berrie BH, Weiss RG, Carretti E. Non-Aqueous Poly(dimethylsiloxane) Organogel Sponges for Controlled Solvent Release: Synthesis, Characterization, and Application in the Cleaning of Artworks. Gels 2023; 9:985. [PMID: 38131971 PMCID: PMC10742450 DOI: 10.3390/gels9120985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/07/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023] Open
Abstract
Polydimethylsiloxane (PDMS) organogel sponges were prepared and studied in order to understand the role of pore size in an elastomeric network on the ability to uptake and release organic solvents. PDMS organogel sponges have been produced according to sugar leaching techniques by adding two sugar templates of different forms and grain sizes (a sugar cube template and a powdered sugar template), in order to obtain materials differing in porosity, pore size distribution, and solvent absorption and liquid retention capability. These materials were compared to PDMS organogel slabs that do not contain pores. The sponges were characterized by Fourier-transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) and compared with PDMS slabs that do not contain pores. Scanning electron microscopy (SEM) provided information about their morphology. X-ray micro-tomography (XMT) allowed us to ascertain how the form of the sugar templating agent influences the porosity of the systems: when templated with sugar cubes, the porosity was 77% and the mean size of the pores was ca. 300 μm; when templated with powdered sugar, the porosity decreased to ca. 10% and the mean pore size was reduced to ca. 75 μm. These materials, porous organic polymers (POPs), can absorb many solvents in different proportions as a function of their polarity. Absorption capacity, as measured by swelling with eight solvents covering a wide range of polarities, was investigated. Rheology data established that solvent absorption did not have an appreciable impact on the gel-like properties of the sponges, suggesting their potential for applications in cultural heritage conservation. Application tests were conducted on the surfaces of two different lab mock-ups that simulate real painted works of art. They demonstrated further that PDMS sponges are a potential innovative support for controlled and selective cleaning of works of art surfaces.
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Affiliation(s)
- Francesca Porpora
- Department of Chemistry “Ugo Schiff” & CSGI Consortium, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (F.P.); (L.D.); (F.O.)
| | - Luigi Dei
- Department of Chemistry “Ugo Schiff” & CSGI Consortium, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (F.P.); (L.D.); (F.O.)
| | | | - Fedora Olivadese
- Department of Chemistry “Ugo Schiff” & CSGI Consortium, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (F.P.); (L.D.); (F.O.)
| | - Shae London
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, DC 20057, USA; (S.L.); (R.G.W.)
| | - Barbara H. Berrie
- Department of Scientific Research, National Gallery of Art, 2000 South Club Drive, Landover, MD 20785, USA;
| | - Richard G. Weiss
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, DC 20057, USA; (S.L.); (R.G.W.)
| | - Emiliano Carretti
- Department of Chemistry “Ugo Schiff” & CSGI Consortium, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (F.P.); (L.D.); (F.O.)
- National Research Council—National Institute of Optics (CNR-INO), Largo E. Fermi 6, 50125 Florence, Italy
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15
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Li J, Barlow LN, Sask KN. Enhancement of protein immobilization on polydimethylsiloxane using a synergistic combination of polydopamine and micropattern surface modification. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2023; 34:2376-2399. [PMID: 37609691 DOI: 10.1080/09205063.2023.2248799] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/07/2023] [Accepted: 08/11/2023] [Indexed: 08/24/2023]
Abstract
Understanding protein interactions at biointerfaces is critical for the improved design of biomaterials and medical devices. Polydimethylsiloxane (PDMS) is used for numerous device applications, and surface modifications can enhance protein immobilization and the response to cells. A multifunctional approach combining topographical and biochemical modifications was applied to PDMS by fabricating 10-20 µm scale patterns onto PDMS surfaces and by coating with polydopamine (PDA). The modifications were confirmed by surface characterization and bovine serum albumin (BSA), fibrinogen (Fg), and fetuin-A (Fet-A) were radiolabeled with 125I. The amounts of protein attached to the surface before and after elution with sodium dodecyl sulfate (SDS) were quantified from single and complex multi-protein solutions to determine protein stability and competitive binding. The PDA coatings were the most stable and capable of immobilizing the highest levels of all proteins. Furthermore, combinations of PDA coatings with the smallest micropatterns provided an additional improvement, enhancing the amount immobilized and the stability. The adsorption of BSA and Fg from plasma demonstrated competitive binding and possible orientation changes, respectively. It was determined that Fet-A, a less studied protein, adsorbed from plasma at low levels, but the adsorption from fetal bovine serum (FBS) was significantly greater, providing important quantification data from radiolabeling that is relevant to many cell culture studies. Overall, combining topography and PDA modification has a synergistic effect on improving protein immobilization. These findings provide new insight on the quantities of proteins bound to PDMS and PDA coatings with implications for cell interactions in various biotechnology and medical applications.
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Affiliation(s)
- Jie Li
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Leah N Barlow
- Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Kyla N Sask
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada
- Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada
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16
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Sanders SL, Douglas LD, Sill TE, Stewart K, Pieniazek N, Li C, Walters E, Al-Hashimi M, Fang L, Davidson RD, Banerjee S. Tetrapodal textured Janus textiles for accessible menstrual health. iScience 2023; 26:108224. [PMID: 38107878 PMCID: PMC10725076 DOI: 10.1016/j.isci.2023.108224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/15/2023] [Accepted: 10/12/2023] [Indexed: 12/19/2023] Open
Abstract
Menstruating individuals without access to adequate hygiene products often improvise with alternatives that pose health risks and limit their participation in society. We describe here a menstrual hygiene product based on low-cost materials, which are integrated onto fabrics to imbue unidirectional permeability. A body-facing "Janus" fabric top layer comprising ZnO tetrapods spray-coated onto polyester mosquito netting imparts hierarchical texturation, augmenting the micron-scale texturation derived from the weave of the underlying fabric. The asymmetric coating establishes a gradient in wettability, which underpins flash spreading and unidirectional permeability. The hygiene product accommodates a variety of absorptive media, which are sandwiched between the Janus layer and a second outward-facing coated densely woven fabric. An assembled prototype demonstrates outstanding ability to wick saline solutions and a menstrual fluid simulant while outperforming a variety of commercially alternatives. The results demonstrate a versatile menstrual health product that provides a combination of dryness, discretion, washability, and safety.
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Affiliation(s)
- Sarah L. Sanders
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Lacey D. Douglas
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Tiffany E. Sill
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Kaylyn Stewart
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Noah Pieniazek
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Chenxuan Li
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
| | - Eve Walters
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | | | - Lei Fang
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
| | - Rachel D. Davidson
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
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17
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Mori K, Kataoka K, Akiyama Y, Asahi T. Covalent Immobilization of Collagen Type I to a Polydimethylsiloxane Surface for Preventing Cell Detachment by Retaining Collagen Molecules under Uniaxial Cyclic Mechanical Stretching Stress. Biomacromolecules 2023; 24:5035-5045. [PMID: 37800307 DOI: 10.1021/acs.biomac.3c00669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Surface modification of polydimethylsiloxane (PDMS) with an extracellular matrix (ECM) is useful for enhancing stable cell attachment. However, few studies have investigated the correlation between the stability of deposited ECM and cell behavior on the PDMS surfaces in external stretched cell culture systems. Herein, covalent collagen type I (Col)-immobilized PDMS surfaces were fabricated using 3-aminopropyl-trimethoxysilane, glutaraldehyde, and Col molecules. The immobilized collagen molecules on the PDMS surface were more stable and uniform than the physisorbed collagen. The cells stably adhered to the Col-immobilized surface and proliferated even under uniaxial cyclic mechanical stretching stress (UnCyMSt), whereas the cells gradually detached from the Col-physisorbed PDMS surface, accompanied by a decrease in the number of deposited collagen molecules. Moreover, the immobilization of collagen molecules enhanced cell alignment under the UnCyMSt. This study reveals that cell adhesion, proliferation, and alignment under the UnCyMSt can be attributed to the retention of collagen molecules on the PDMS surface.
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Affiliation(s)
- Kazuaki Mori
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
| | - Kosuke Kataoka
- Comprehensive Research Organization, Waseda University, 513 Waseda-tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| | - Yoshikatsu Akiyama
- Tokyo Women's Medical University, TWIns, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
| | - Toru Asahi
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
- Comprehensive Research Organization, Waseda University, 513 Waseda-tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
- Research Organization for Nano & Life Innovation, Waseda University, 513 Waseda-tsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
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18
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Srinivasaraghavan Govindarajan R, Sikulskyi S, Ren Z, Stark T, Kim D. Characterization of Photocurable IP-PDMS for Soft Micro Systems Fabricated by Two-Photon Polymerization 3D Printing. Polymers (Basel) 2023; 15:4377. [PMID: 38006101 PMCID: PMC10675433 DOI: 10.3390/polym15224377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/05/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Recent developments in micro-scale additive manufacturing (AM) have opened new possibilities in state-of-the-art areas, including microelectromechanical systems (MEMS) with intrinsically soft and compliant components. While fabrication with soft materials further complicates micro-scale AM, a soft photocurable polydimethylsiloxane (PDMS) resin, IP-PDMS, has recently entered the market of two-photon polymerization (2PP) AM. To facilitate the development of microdevices with soft components through the application of 2PP technique and IP-PDMS material, this research paper presents a comprehensive material characterization of IP-PDMS. The significance of this study lies in the scarcity of existing research on this material and the thorough investigation of its properties, many of which are reported here for the first time. Particularly, for uncured IP-PDMS resin, this work evaluates a surface tension of 26.7 ± 4.2 mN/m, a contact angle with glass of 11.5 ± 0.6°, spin-coating behavior, a transmittance of more than 90% above 440 nm wavelength, and FTIR with all the properties reported for the first time. For cured IP-PDMS, novel characterizations include a small mechanical creep, a velocity-dependent friction coefficient with glass, a typical dielectric permittivity value of 2.63 ± 0.02, a high dielectric/breakdown strength for 3D-printed elastomers of up to 73.3 ± 13.3 V/µm and typical values for a spin coated elastomer of 85.7 ± 12.4 V/µm, while the measured contact angle with water of 103.7 ± 0.5°, Young's modulus of 5.96 ± 0.2 MPa, and viscoelastic DMA mechanical characterization are compared with the previously reported values. Friction, permittivity, contact angle with water, and some of the breakdown strength measurements were performed with spin-coated cured IP-PDMS samples. Based on the performed characterization, IP-PDMS shows itself to be a promising material for micro-scale soft MEMS, including microfluidics, storage devices, and micro-scale smart material technologies.
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Affiliation(s)
| | | | | | | | - Daewon Kim
- Department of Aerospace Engineering, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA; (R.S.G.); (S.S.); (Z.R.); (T.S.)
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19
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Wrede P, Aghakhani A, Bozuyuk U, Yildiz E, Sitti M. Acoustic Trapping and Manipulation of Hollow Microparticles under Fluid Flow Using a Single-Lens Focused Ultrasound Transducer. ACS APPLIED MATERIALS & INTERFACES 2023; 15. [PMID: 37917969 PMCID: PMC10658455 DOI: 10.1021/acsami.3c11656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/10/2023] [Accepted: 10/17/2023] [Indexed: 11/04/2023]
Abstract
Microparticle manipulation and trapping play pivotal roles in biotechnology. To achieve effective manipulation within fluidic flow conditions and confined spaces, it is necessary to consider the physical properties of microparticles and the types of trapping forces applied. While acoustic waves have shown potential for manipulating microparticles, the existing setups involve complex actuation mechanisms and unstable microbubbles. Consequently, the need persists for an easily deployable acoustic actuation setup with stable microparticles. Here, we propose the use of hollow borosilicate microparticles possessing a rigid thin shell, which can be efficiently trapped and manipulated using a single-lens focused ultrasound (FUS) transducer under physiologically relevant flow conditions. These hollow microparticles offer stability and advantageous acoustic properties. They can be scaled up and mass-produced, making them suitable for systemic delivery. Our research demonstrates the successful trapping dynamics of FUS within circular tubings of varying diameters, validating the effectiveness of the method under realistic flow rates and ultrasound amplitudes. We also showcase the ability to remove hollow microparticles by steering the FUS transducer against the flow. Furthermore, we present potential biomedical applications, such as active cell tagging and navigation in bifurcated channels as well as ultrasound imaging in mouse cadaver liver tissue.
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Affiliation(s)
- Paul Wrede
- Physical
Intelligence Department, Max Planck Institute
for Intelligent Systems, 70569 Stuttgart, Germany
| | - Amirreza Aghakhani
- Physical
Intelligence Department, Max Planck Institute
for Intelligent Systems, 70569 Stuttgart, Germany
- Institute
of Biomaterials and Biomolecular Systems, University of Stuttgart, 70569 Stuttgart, Germany
| | - Ugur Bozuyuk
- Physical
Intelligence Department, Max Planck Institute
for Intelligent Systems, 70569 Stuttgart, Germany
| | - Erdost Yildiz
- Physical
Intelligence Department, Max Planck Institute
for Intelligent Systems, 70569 Stuttgart, Germany
| | - Metin Sitti
- Physical
Intelligence Department, Max Planck Institute
for Intelligent Systems, 70569 Stuttgart, Germany
- Institute
for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
- School
of Medicine and School of Engineering, Koç
University, Istanbul, 34450, Turkey
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20
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Al-Ali A, Waheed W, Dawaymeh F, Alamoodi N, Alazzam A. A surface treatment method for improving the attachment of PDMS: acoustofluidics as a case study. Sci Rep 2023; 13:18141. [PMID: 37875576 PMCID: PMC10598025 DOI: 10.1038/s41598-023-45429-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 10/19/2023] [Indexed: 10/26/2023] Open
Abstract
A method for a permanent surface modification of polydimethylsiloxane (PDMS) is presented. A case study on the attachment of PDMS and the lithium niobate (LiNbO3) wafer for acoustofluidics applications is presented as well. The method includes a protocol for chemically treating the surface of PDMS to strengthen its bond with the LiNbO3 surface. The PDMS surface is modified using the 3-(trimethoxysilyl) propyl methacrylate (TMSPMA) silane reagent. The effect of silane treatment on the hydrophilicity, morphology, adhesion strength to LiNbO3, and surface energy of PDMS is investigated. The results demonstrated that the silane treatment permanently increases the hydrophilicity of PDMS and significantly alters its morphology. The bonding strength between PDMS and LiNbO3increased with the duration of the silane treatment, reaching a maximum of approximately 500 kPa. To illustrate the effectiveness of this method, an acoustofluidic device was tested, and the device demonstrated very promising enhanced bonding and sealing capabilities with particle manipulation at a flow rate of up to 1 L/h by means of traveling surface acoustic waves (TSAW). The device was reused multiple times with no fluid leakage or detachment issues. The utility of the presented PDMS surface modification method is not limited to acoustofluidics applications; it has the potential to be further investigated for applications in various scientific fields in the future.
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Affiliation(s)
- Abdulla Al-Ali
- Mechanical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Waqas Waheed
- Mechanical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates
- System on Chip Lab, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Fadi Dawaymeh
- Chemical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Nahla Alamoodi
- Chemical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Anas Alazzam
- Mechanical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates.
- System on Chip Lab, Khalifa University, Abu Dhabi, United Arab Emirates.
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21
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Ali S, Farrukh S, Karim SS, Noor T, Liaquat S, Sultan A. Investigation of the effect of Ni and Cu variant MOF-74 in the Polydimethylsiloxane (PDMS)-based Mixed Matrix Membranes (MMMs) for efficient gas separation applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109453-109468. [PMID: 37924166 DOI: 10.1007/s11356-023-30029-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/18/2023] [Indexed: 11/06/2023]
Abstract
Mixed matrix membranes (MMMs) containing metal-organic frameworks (MOFs) have been an emerging and promising membrane technology to contribute to different gas separation applications including carbon dioxide (CO2) and oxygen (O2) separation, because of their large surface areas and distinctive gas adsorption features. In this work, the fabrication process of Polydimethylsiloxane (PDMS)-based MMMs was reported, in which 0.5 to 2 wt.% of each type of (Cu, Ni)-based MOF-74 variants were incorporated into a PDMS matrix in order to achieve high CO2/N2, O2/N2, and CO2/O2 separation efficiency. These MMMs and their nanofillers (MOF-74) were extensively characterized using scanning electron microscopy (SEM) along with Energy Dispersive X-Ray (EDX) mapping, X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), a single gas permeation testing system, and an ultimate tensile strength testing (UTS) unit in order to gain insight into their properties in relation to their gas separation performance. The 1 wt.% of both (Cu and Ni)-MOF-74@PDMS were selected as the most optimum MMMs due to their uniform morphology and enhanced tensile strength, which exhibited high CO2 permeabilities of 4432 Barrer (37.9% increase) and 4288 Barrer (33.5% increase), respectively. Furthermore, in the case of 1 wt.% Ni-MOF-74@PDMS, the CO2/N2, O2/N2, and CO2/O2 selectivities were also enhanced to 36.2 (141.6% increase), 3.2 (21.9% increase), and 11.25 (98.1% increase), respectively. While, in the case of 1 wt.% Cu-MOF-74@PDMS the CO2/N2 and O2/N2 selectivities showed an increment up-to 94.7 (531.5% increase) and 6.47 (145% increase), respectively, Whereas, at 0.5 wt.%, Cu-MOF-74@PDMS showed the best CO2/O2 selectivity of 25.26 (344.7% increase).
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Affiliation(s)
- Subhan Ali
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
| | - Sarah Farrukh
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan.
- School of Engineering, Institute for Materials and Processes, The University of Edinburgh, Edinburgh, EH9 3FB, Scotland, UK.
| | - Syed Shujaat Karim
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
| | - Tayyaba Noor
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
| | - Sidra Liaquat
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
| | - Ayesha Sultan
- Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan
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22
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Guan X, Lu D, Chen Z, Wang Z, Zhou G, Fan Y. Non-invasive detection of bladder cancer via microfluidic immunoassay of the protein biomarker NMP22. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023. [PMID: 37377044 DOI: 10.1039/d3ay00664f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Bladder cancer (BC) is a malignant tumor that occurs in the bladder mucosa and has a high morbidity and mortality rate. Early diagnosis means that cystoscopy-aided imaging is invasive and pricey. Microfluidic immunoassay enables noninvasive detection of early BC. However, its clinical applications are limited due to the poor internal design and hydrophobic surface of polydimethylsiloxane (PDMS) chip. This study aims to design a PDMS chip with right-moon capture arrays and prepare a hydrophilic surface by APTES with different concentrations (PDMS-three-step: O2 plasma-5-98% APTES), which facilitates early detection of BC with enhanced sensitivity. Simulations showed that the right-moon arrays in the capture chamber reduced the flow velocity and shear stress of the target molecule NMP22, improving the capture performance of the chip. PDMS-three-step surface was measured by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), contact angle, and antibody immobilization. The results displayed that the contact angle of PDMS-three-step remained in the range of 40° to 50° even after 30 days of exposure to air, leading to a more stable hydrophilic surface. The effectiveness of the PDMS chip was assessed via the quantitative immunoassay of the protein marker NMP22 and its sensitivity analysis to urine. After the assessment, the LOD of NMP22 was 2.57 ng mL-1, and the sensitivity was 86.67%, which proved that the PDMS chip was effective. Thus, this study provided a novel design and modification method of the microfluidic chip for the early detection of BC.
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Affiliation(s)
- Xiali Guan
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
| | - Da Lu
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
| | - Zhigang Chen
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
| | - Zhuya Wang
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
| | - Gang Zhou
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
- Shenzhen Research Institute, Beihang University, Shenzhen, 518057, China
| | - Yubo Fan
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
- Shenzhen Research Institute, Beihang University, Shenzhen, 518057, China
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23
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Rius-Ayra O, Carmona-Ruiz M, Llorca-Isern N. Superhydrophobic cotton fabrics for effective removal of high-density polyethylene and polypropylene microplastics: Insights from surface and colloidal analysis. J Colloid Interface Sci 2023; 646:763-774. [PMID: 37229994 DOI: 10.1016/j.jcis.2023.05.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/15/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023]
Abstract
HYPOTHESIS The use of superhydrophobic materials to remove particulate pollutants such as microplastics is still in its infancy. In a previous study, we investigated the effectiveness of three different types of superhydrophobic materials - coatings, powdered materials, and meshes - for removing microplastics. In this study, we will explain the removal process by considering microplastics as colloids and taking into account their wetting properties as well as those of a superhydrophobic surface. The process will be explained through the interactions of electrostatic forces, van der Waals forces, and the DLVO theory. EXPERIMENTS In order to replicate and verify the previous experimental findings on the removal of microplastics using superhydrophobic surfaces, we have modified non-woven cotton fabrics with polydimethylsiloxane. We then proceeded to remove high-density polyethylene and polypropylene microplastics from water by introducing oil at the microplastics-water interface, and we determined the removal efficiency of the modified cotton fabrics. FINDINGS After achieving a superhydrophobic non-woven cotton fabric (159 ± 1°), we confirmed its effectiveness in removing high-density polyethylene and polypropylene microplastics from water with a removal efficiency of 99%. Our findings suggest that the binding energy of microplastics increases and the Hamaker constant becomes positive when they are present in oil instead of water, leading to their aggregation. As a result, electrostatic interactions become negligible in the organic phase, and van der Waals interactions become more important. The use of the DLVO theory allowed us to confirm that solid pollutants can be easily removed from the oil using superhydrophobic materials.
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Affiliation(s)
- O Rius-Ayra
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1 - 11, 08028 Barcelona, Spain.
| | - M Carmona-Ruiz
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1 - 11, 08028 Barcelona, Spain
| | - N Llorca-Isern
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1 - 11, 08028 Barcelona, Spain
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24
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Tang X, Yang Y, Zheng M, Yin T, Huang G, Lai Z, Zhang B, Chen Z, Xu T, Ma T, Pan H, Cai L. Magnetic-Acoustic Sequentially Actuated CAR T Cell Microrobots for Precision Navigation and In Situ Antitumor Immunoactivation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2211509. [PMID: 36807373 DOI: 10.1002/adma.202211509] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 02/10/2023] [Indexed: 05/05/2023]
Abstract
Despite its clinical success, chimeric antigen receptor T (CAR T)-cell immunotherapy remains limited in solid tumors, owing to the harsh physical barriers and immunosuppressive microenvironment. Here a CAR-T-cell-based live microrobot (M-CAR T) is created by decorating CAR T with immunomagnetic beads using click conjugation. M-CAR Ts are capable of magnetic-acoustic actuation for precision targeting and in situ activation of antitumor immune responses. Sequential actuation endows M-CAR Ts with magnetically actuated anti-flow and obstacle avoidance as well as tissue penetration driven by acoustic propulsion, enabling efficient migration and accumulation in artificial tumor models. In vivo, sequentially actuated M-CAR Ts achieves long-distance targeting and accumulate at the peritumoural area under programmable magnetic guidance, and subsequently acoustic tweezers actuate M-CAR Ts to migrate into deep tumor tissues, resulting in a 6.6-fold increase in accumulated exogenous CD8+ CAR T cells compared with that without actuation. Anti-CD3/CD28 immunomagnetic beads stimulate infiltrated CAR T proliferation and activation in situ, significantly enhancing their antitumor efficacy. Thus, this sequential-actuation-guided cell microrobot combines the merits of autonomous targeting and penetration of intelligent robots with in situ T-cell immunoactivation, and holds considerable promise for precision navigation and cancer immunotherapies.
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Affiliation(s)
- Xiaofan Tang
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Ye Yang
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Mingbin Zheng
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
- Guangdong Key Laboratory for Research and Development of Natural Drugs, Key Laboratory for Nanomedicine, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - Ting Yin
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
- Guangdong Key Laboratory for Research and Development of Natural Drugs, Key Laboratory for Nanomedicine, Guangdong Medical University, Dongguan, 523808, P. R. China
| | - Guojun Huang
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Zhengyu Lai
- Guangdong Provincial Key Lab of Robotics and Intelligent System, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Baozhen Zhang
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Ze Chen
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Tiantian Xu
- Guangdong Provincial Key Lab of Robotics and Intelligent System, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Teng Ma
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Hong Pan
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Lintao Cai
- Guangdong Key Laboratory of Nanomedicine, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
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25
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Kim JH, Kim JH, Seo S. Amplifying the Output of a Triboelectric Nanogenerator Using an Intermediary Layer of Gallium-Based Liquid Metal Particles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1290. [PMID: 37049383 PMCID: PMC10097196 DOI: 10.3390/nano13071290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/26/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
The production of energy has become a major issue in today's world. Triboelectric nanogenerators (TENGs) are promising devices that can harvest mechanical energy and convert it into electrical energy. This study explored the use of Galinstan particles in the production of TENGs, which convert mechanical energy into electrical energy. During the curing process, the evaporation of the hexane solvent resulted in a film with varying concentrations of Galinstan particles. The addition of n-hexane during ultrasonication reduced the viscosity of the polydimethylsiloxane (PDMS) solution, allowing for the liquid metal (LM) particles to be physically pulverized into smaller pieces. The particle size distribution of the film with a Galinstan concentration of 23.08 wt.% was measured to be within a few micrometers through ultrasonic crushing. As the amount of LM particles in the PDMS film increased, the capacitance of the film also increased, with the LM/PDMS film with a 23.08% weight percentage exhibiting the highest capacitance value. TENGs were created using LM/PDMS films with different weight percentages and tested for open-circuit voltage, short-circuit current, and charge amount Q. The TENG with an LM/PDMS film with a 23.08% weight percentage had the highest relative permittivity, resulting in the greatest voltage, current, and charge amount. The use of Galinstan particles in PDMS films has potential applications in wearable devices, sensors, and biomedical fields.
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Affiliation(s)
- Jong Hyeok Kim
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea;
| | - Ju-Hyung Kim
- Department of Chemical Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Soonmin Seo
- Department of Bionano Technology, Gachon University, Seongnam 13120, Republic of Korea;
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26
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Karaca N, Yıldırım H. Preparation of the polymerizable novel high refractive index hybrid carbazole-based polysiloxane oligomers by a sol–gel condensation reaction. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-023-03526-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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27
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Zainuddin MIF, Ahmad AL, Shah Buddin MMH. Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO 2 Separation Application. MEMBRANES 2023; 13:membranes13030337. [PMID: 36984724 PMCID: PMC10051079 DOI: 10.3390/membranes13030337] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/02/2023] [Accepted: 03/08/2023] [Indexed: 05/31/2023]
Abstract
Carbon dioxide (CO2) concentration is now 50% higher than in the preindustrial period and efforts to reduce CO2 emission through carbon capture and utilization (CCU) are blooming. Membranes are one of the attractive alternatives for such application. In this study, a rubbery polymer polydimethylsiloxane (PDMS) membrane is incorporated with magnesium oxide (MgO) with a hierarchically two-dimensional (2D) nanosheet shape for CO2 separation. The average thickness of the synthesized MgO nanosheet in this study is 35.3 ± 1.5 nm. Based on the pure gas separation performance, the optimal loading obtained is at 1 wt.% where there is no observable significant agglomeration. CO2 permeability was reduced from 2382 Barrer to 1929 Barrer while CO2/N2 selectivity increased from only 11.4 to 12.7, and CO2/CH4 remained relatively constant when the MMM was operated at 2 bar and 25 °C. Sedimentation of the filler was observed when the loading was further increased to 5 wt.%, forming interfacial defects on the bottom side of the membrane and causing increased CO2 gas permeability from 1929 Barrer to 2104 Barrer as compared to filler loading at 1 wt.%, whereas the CO2/N2 ideal selectivity increased from 12.1 to 15.0. Additionally, this study shows that there was no significant impact of pressure on separation performance. There was a linear decline of CO2 permeability with increasing upstream pressure while there were no changes to the CO2/N2 and CO2/CH4 selectivity.
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Affiliation(s)
- Muhd Izzudin Fikry Zainuddin
- School of Chemical Engineering, Universiti Sains Malaysia Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia
| | - Abdul Latif Ahmad
- School of Chemical Engineering, Universiti Sains Malaysia Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia
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28
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Wu D, Baresch D, Cook C, Ma Z, Duan M, Malounda D, Maresca D, Abundo MP, Lee J, Shivaei S, Mittelstein DR, Qiu T, Fischer P, Shapiro MG. Biomolecular actuators for genetically selective acoustic manipulation of cells. SCIENCE ADVANCES 2023; 9:eadd9186. [PMID: 36812320 PMCID: PMC9946353 DOI: 10.1126/sciadv.add9186] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 01/20/2023] [Indexed: 06/01/2023]
Abstract
The ability to physically manipulate specific cells is critical for the fields of biomedicine, synthetic biology, and living materials. Ultrasound has the ability to manipulate cells with high spatiotemporal precision via acoustic radiation force (ARF). However, because most cells have similar acoustic properties, this capability is disconnected from cellular genetic programs. Here, we show that gas vesicles (GVs)-a unique class of gas-filled protein nanostructures-can serve as genetically encodable actuators for selective acoustic manipulation. Because of their lower density and higher compressibility relative to water, GVs experience strong ARF with opposite polarity to most other materials. When expressed inside cells, GVs invert the cells' acoustic contrast and amplify the magnitude of their ARF, allowing the cells to be selectively manipulated with sound waves based on their genotype. GVs provide a direct link between gene expression and acoustomechanical actuation, opening a paradigm for selective cellular control in a broad range of contexts.
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Affiliation(s)
- Di Wu
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - Diego Baresch
- University of Bordeaux, CNRS, Bordeaux INP, I2M, UMR 5295, F-33400 Talence, France
| | - Colin Cook
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - Zhichao Ma
- Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569 Stuttgart, Germany
| | - Mengtong Duan
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Dina Malounda
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - David Maresca
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Maria P. Abundo
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Justin Lee
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Shirin Shivaei
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - David R. Mittelstein
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - Tian Qiu
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Peer Fischer
- Max Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, INF 225, 69120 Heidelberg, Germany
| | - Mikhail G. Shapiro
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
- Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA
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29
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Wu XH, Liew YK, Lim WM, Mai C, Then YY. Blood compatible and noncytotoxic superhydrophobic graphene/titanium dioxide coating with antibacterial and antibiofilm properties. J Appl Polym Sci 2023. [DOI: 10.1002/app.53629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Xun Hui Wu
- School of Postgraduate Studies International Medical University Kuala Lumpur Malaysia
| | - Yun Khoon Liew
- Department of Life Sciences School of Pharmacy, International Medical University Kuala Lumpur Malaysia
| | - Wei Meng Lim
- School of Pharmacy Monash University Subang Jaya Selangor Malaysia
| | - Chun‐Wai Mai
- State Key Laboratory of Oncogenes and Related Genes, Renji‐Med X Clinical Stem Cell Research Center, Department of Urology Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
| | - Yoon Yee Then
- Department of Pharmaceutical Chemistry School of Pharmacy, International Medical University Kuala Lumpur Malaysia
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30
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Chen YF, Hsieh CL, Lee LR, Liu YC, Lee MJ, Chen JT. Photoswitchable and Solvent-Controlled Directional Actuators: Supramolecular Assembly and Crosslinked Polymers. Macromol Rapid Commun 2023; 44:e2200547. [PMID: 36208074 DOI: 10.1002/marc.202200547] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 09/30/2022] [Indexed: 01/26/2023]
Abstract
Untethered small actuators have drawn tremendous interest owing to their reversibility, flexibility, and widespread applications in various fields. For polymer actuators, however, it is still challenging to achieve programmable structural changes under different stimuli caused by the intractability and single-stimulus responses of most polymer materials. Herein, multi-stimuli-responsive polymer actuators that can respond to light and solvent via structural changes are developed. The actuators are based on bilayer films of polydimethylsiloxane (PDMS) and azobenzene chromophore (AAZO)-crosslinked poly(diallyldimethylammonium chloride) (PDAC). Upon UV light irradiation, the AAZO undergoes trans-cis-trans photoisomerization, causing the bending of the bilayer films. When the UV light is off, a shape recovery toward an opposite direction occurs spontaneously. The reversible deformation can be repeated at least 20 cycles. Upon solvent vapor annealing, one of the bilayer films can be selectively swollen, causing the bending of the bilayer films with the directions controlled by the solvent vapors. The effects of different parameters, such as the weight ratios of AAZO and film thicknesses, on the bending angles and curvatures of the polymer films are also analyzed. The results demonstrate that multi-stimuli-responsive actuators with fast responses and high reproducibility can be fulfilled.
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Affiliation(s)
- Yi-Fan Chen
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Chia-Ling Hsieh
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Lin-Ruei Lee
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Yu-Chun Liu
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Min-Jie Lee
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Jiun-Tai Chen
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.,Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
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31
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Peng P, Lan Y, Xu A, Liu M. Enhanced ethanol pervaporative selectivity of polydimethylsiloxane membranes by incorporating with graphene oxide@silica core‐shell structure. J Appl Polym Sci 2022. [DOI: 10.1002/app.53449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ping Peng
- Laboratory of Membrane Science and Technology, School of Resource and Chemical Engineering Sanming University Sanming China
- Science and Technology on Sanming Institute of Fluorochemical Industry Sanming China
| | - Yongqiang Lan
- Laboratory of Membrane Science and Technology, School of Resource and Chemical Engineering Sanming University Sanming China
| | - Amei Xu
- Laboratory of Membrane Science and Technology, School of Resource and Chemical Engineering Sanming University Sanming China
| | - Mengyao Liu
- Laboratory of Membrane Science and Technology, School of Resource and Chemical Engineering Sanming University Sanming China
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32
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Erenay B, Sağlam ASY, Garipcan B, Jandt KD, Odabaş S. Bone surface mimicked PDMS membranes stimulate osteoblasts and calcification of bone matrix. BIOMATERIALS ADVANCES 2022; 142:213170. [PMID: 36341745 DOI: 10.1016/j.bioadv.2022.213170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/06/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Cellular microenvironments play a crucial role in cell behavior. In addition to the biochemical cues present in the microenvironments, biophysical and biomechanical properties on surfaces have an impact on cellular functionality and eventually cellular fate. Effects of surface topography on cell behavior are being studied extensively in the literature. However, these studies often try to replicate topographical features of tissue surfaces by using techniques such as chemical etching, photolithography, and electrospinning, which may result in the loss of crucial micro- and nano- features on the tissue surfaces such as bone. This study investigates the topographical effects of bone surface by transferring its surface features onto polydimethylsiloxane (PDMS) membranes using soft lithography from a bovine femur. Our results have shown that major features on bone surfaces were successfully transferred onto PDMS using soft lithography. Osteoblast proliferation and calcification of bone matrix have significantly increased along with osteoblast-specific differentiation and maturation markers such as osteocalcin (OSC), osterix (OSX), collagen type I alpha 1 chain (COL1A1), and alkaline phosphatase (ALP) on bone surface mimicked (BSM) PDMS membranes in addition to a unidirectional alignment of osteoblast cells compared to plain PDMS surfaces. This presented bone surface mimicking method can provide a versatile native-like platform for further investigation of intracellular pathways regarding osteoblast growth and differentiation.
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Affiliation(s)
- Berkay Erenay
- Biomimetics and Bioinspired Biomaterials Research Laboratory, Institute of Biomedical Engineering, Boğaziçi University, 34684, Turkey
| | - Atiye Seda Yar Sağlam
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara 06500, Turkey
| | - Bora Garipcan
- Biomimetics and Bioinspired Biomaterials Research Laboratory, Institute of Biomedical Engineering, Boğaziçi University, 34684, Turkey
| | - Klaus D Jandt
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich Schiller University, Jena 07743, Germany.
| | - Sedat Odabaş
- Biomaterials and Tissue Engineering Laboratory (BteLAB), Faculty of Science, Department of Chemistry, Ankara University, 06560, Turkey; Interdisciplinary Research Unit for Advanced Materials (INTRAM), Ankara University, Ankara 06560, Turkey.
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33
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Maślanka P, Aleksieiev A, Korycki R, Szafrańska H, Dąbrowska A. Experimental and Numerical Determination of Strength Characteristics Related to Paraglider Wing with Fourier Transform Infrared Spectroscopy of Applied Materials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7291. [PMID: 36295356 PMCID: PMC9610416 DOI: 10.3390/ma15207291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/08/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
The aim of paper is to determine experimentally and numerically the strength characteristics related to the paraglider wing with Fourier transform infrared spectroscopy of applied materials. The applied method consists in theoretical modeling supplemented by the tests of material parameters. First, the set of 10 lightweight fabrics was selected for the tests; the samples are representative for these structures. The materials were tested using the spectroscopy to determine the FTIR spectra. The samples differ in the content of certain characteristic groups. Air permeability change of the materials was determined for the different pressure drops. The air permeability of almost all the analyzed samples was close to zero with the exception of only one material. The tensile strength and elongation at the break of samples were determined on the testing machine. The paraglider samples were characterized by slightly decreased mechanical properties compared to the parachute fabrics. The material characteristics determined during the tests are the input data for the theoretical analysis. The numerical model of the paraglider wing is based on a 3D geometry from previous research, but the stress, strain, and deformation were determined using the ANSYS Structural program and the finite elements method. To determine the strength correctly, we introduce two basic values: the absolute maximal and the representative values that are the biggest repetitive values of stress, strain, and deformation. The stress value was determined by the main factors: (i) the thinner the material, the bigger the stresses that were accumulated; (ii) the stronger the material, the bigger the stresses that were accumulated. The results are similar for all materials and differ mainly by the values. The biggest stresses were observed inside the material contacting the ribs, whereas the biggest deformation and strain were in the regions between ribs, and the smallest were in the contact areas with the fixed supports. Their highest intensity was observed on the leading edge of the paraglider. We conclude that the obtained stresses were far from the breaking level for the wing.
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Affiliation(s)
- Paulina Maślanka
- Interdisciplinary Doctoral School, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Andrii Aleksieiev
- Interdisciplinary Doctoral School, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Ryszard Korycki
- Department of Mechanical Engineering, Informatics and Chemistry of Polymer Materials, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland
| | - Halina Szafrańska
- Department of Physicochemistry and Materials Technology, Faculty of Chemical Engineering and Commodity Science, Kazimierz Pulaski University of Technology and Humanities in Radom, Chrobrego Str. 27, 26-600 Radom, Poland
| | - Anna Dąbrowska
- Department of Personal Protective Equipment, Central Institute for Labour Protection—National Research Institute (CIOP-PIB), Wierzbowa Str. 48, 90-133 Lodz, Poland
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34
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Wu J, Chen P, Chen J, Ye X, Cao S, Sun C, Jin Y, Zhang L, Du S. Integrated ratiometric fluorescence probe-based acoustofluidic platform for visual detection of anthrax biomarker. Biosens Bioelectron 2022; 214:114538. [PMID: 35820251 DOI: 10.1016/j.bios.2022.114538] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/13/2022] [Accepted: 07/01/2022] [Indexed: 11/28/2022]
Abstract
The sensitive detection of dipicolinic acid (DPA) as an excellent biomarker of Bacillus anthracis, especially through visual point-of-care testing, is significant for accurate and rapid diagnosis of anthrax to timely prevent anthrax disease or biological terrorist attack. Herein, an acoustofluidics-based colorimetric platform with the integrated ratiometric fluorescence probe (INT-probe) was fabricated, which improved the sensitivity of visual detection for DPA and overcame the poor reproducibility of the existing acoustofluidics-assisted colorimetric analysis. For the design of INT-probe, Eu3+-EDTA complex as sensing moiety was grafted onto the surface of blue organosilane-functionalized carbon dots (SiCDs)-doped SiO2 nanoparticles (NPs). Upon exposure to DPA, Eu3+ was sensitized by DPA to emit red luminescence, while the SiCDs as reference inside the SiO2 NPs still kept the blue fluorescence unchanged. Attributed to the acoustic radiation force-driven enrichment of the INT-probe, slight color changes caused by low concentration of DPA could be amplified and distinguished by naked-eyes/smartphone. With the increase of DPA concentration, obvious color variations of INT-probe/DPA aggregates from blue to pink could be observed, and the color information of the fluorescent aggregates was converted to red, green and blue values for quantitative analysis, whose lowest detectable concentration reached 100 nM that is about 2-3 orders of magnitude lower than the infectious dosage of Bacillus anthracis spores (60 μM). Importantly, benefiting from the great color signal enhancement by acoustofluidic sensing platform, the usage of Eu3+ reduced to as low as 0.273 μmol per gram of SiO2 NPs, providing a meaningful way to utilize lanthanide resource efficiently.
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Affiliation(s)
- Jiafeng Wu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Panpan Chen
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Jie Chen
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Xiangxue Ye
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Shurui Cao
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Chuqiang Sun
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yang Jin
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Liying Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
| | - Shuhu Du
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
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35
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A monolithic capsule phase microextraction method combined with HPLC-DAD for the monitoring of benzoyl urea insecticides in apple juice samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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36
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Day NB, Dalhuisen R, Loomis NE, Adzema SG, Prakash J, Shields Iv CW. Tissue-adhesive hydrogel for multimodal drug release to immune cells in skin. Acta Biomater 2022; 150:211-220. [PMID: 35921992 DOI: 10.1016/j.actbio.2022.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 11/01/2022]
Abstract
Both innate and adaptive immune systems play a crucial role in the pathology of skin diseases. To control these cells, there is a need for transdermal drug delivery systems that can target multiple cell populations at independently tunable rates. Herein, we describe a tissue-adhesive hydrogel system that contains particles capable of regulating the release of small molecule drugs at defined rates. Resiquimod (a macrophage-targeting drug) and palbociclib (a T cell-targeting drug) are encapsulated within two types of silicone particles embedded within the hydrogel. We demonstrate that drug release is mediated by the crosslink density of the particles, which is decoupled from the bulk properties of the hydrogel. We show that this system can be used to sustainably polarize macrophages toward an anti-tumor phenotype in vitro and ex vivo, and that the hydrogels can remain attached to skin explants for several days without generating toxicity. The hydrogel system is compatible with standard dermatological procedures and allows transdermal passage of drugs. The multimodal, tunable nature of this system has implications in treating a variety of skin disorders, managing infections, and delivering vaccines. STATEMENT OF SIGNIFICANCE: We describe a tissue-adhesive hydrogel that can regulate the release of drugs in a manner that is decoupled from its bulk properties. The mechanism of drug release is mediated by embedded microparticles with well-defined crosslink densities. The significance of this system is that, by encapsulating different drugs into the particles, it is possible to achieve multimodal drug release. We demonstrate this capability by releasing two immunomodulatory drugs at disparate rates. A drug that targets innate immune cells is released quickly, and a drug that targets adaptive immune cells is released slowly. This programmable system offers a direct means by which cellular responses can be enhanced through independent targeting for a variety of transdermal applications, including cancer treatment and vaccine delivery.
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Affiliation(s)
- Nicole B Day
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO 80303, United States
| | - Rianne Dalhuisen
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO 80303, United States; Department of Advanced Organ Bioengineering and Therapeutics, Section: Engineered Therapeutics, University of Twente, Enschede, the Netherlands
| | - Nichole E Loomis
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO 80303, United States
| | - Sarah G Adzema
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO 80303, United States
| | - Jai Prakash
- Department of Advanced Organ Bioengineering and Therapeutics, Section: Engineered Therapeutics, University of Twente, Enschede, the Netherlands
| | - C Wyatt Shields Iv
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder CO 80303, United States; Biomedical Engineering Program, University of Colorado Boulder, Boulder CO 80303, United States.
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37
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Morgado V, Gomes L, Bettencourt da Silva RJN, Palma C. Microplastics contamination in sediments from Portuguese inland waters: Physical-chemical characterisation and distribution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:155053. [PMID: 35390385 DOI: 10.1016/j.scitotenv.2022.155053] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 06/14/2023]
Abstract
Plastics are the major constituent of waste accumulated in inland waters and subsequently transferred to the ocean. The smaller plastic particles, typically obtained from the fragmentation of larger pieces, are vehicles for food chain accumulation of plastic components and contaminants sorbed to these particles through their ingestion by small organisms. The monitoring of the level and trends of the contamination by microplastics is essential to determine the relevance and potential sources of this contamination necessary to define strategies to reduce this threat. This work presents microplastic contamination levels and trends of sediments of four Portuguese inland waters, namely Ria de Aveiro, Ria Formosa, Mira river, and Mondego river, between 02/2019 and 09/2020. The contamination is classified considering the type of polymer and size, shape, and colour of particles. Polymers are identified by micro-ATR-FTIR with true and false identification rates larger and lower than 95% and 5%, respectively. Duplicate analysis results are used to quantify contamination heterogeneity subsequently applied to assess if a specific contamination trend is not meaningful for a 99% confidence level. The analytical procedure is described in detail to clarify the scope of the analysis. Tests' quality is controlled by following strict quality control measures. Results from sixty-three sediment samples proved the ubiquitous presence of microplastic (MP) in these inland waters with contamination levels ranging between 20 MP kg-1 and 1090 MP kg-1, excluding six samples not contaminated with these particles. Overall, more than 86% of the microplastics were fragments lower than 1000 μm, and 33% were identified as polyethylene or polypropylene. A large diversity of microplastic colours was observed. For the Mondego River and Ria de Aveiro locations monitored for consecutive years, no significant variations of microplastic contamination were observed for a 99% confidence level.
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Affiliation(s)
- Vanessa Morgado
- Instituto Hidrográfico, R. Trinas 49, 1249-093 Lisboa, Portugal; Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Luís Gomes
- Instituto Hidrográfico, R. Trinas 49, 1249-093 Lisboa, Portugal
| | - Ricardo J N Bettencourt da Silva
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Carla Palma
- Instituto Hidrográfico, R. Trinas 49, 1249-093 Lisboa, Portugal
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38
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Martin LMA, Sheng J, Zimba PV, Zhu L, Fadare OO, Haley C, Wang M, Phillips TD, Conkle J, Xu W. Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water. NANOMATERIALS 2022; 12:nano12142348. [PMID: 35889573 PMCID: PMC9315505 DOI: 10.3390/nano12142348] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 02/05/2023]
Abstract
Nanoplastic pollution is increasing worldwide and poses a threat to humans, animals, and ecological systems. High-throughput, reliable methods for the isolation and separation of NMPs from drinking water, wastewater, or environmental bodies of water are of interest. We investigated iron oxide nanoparticles (IONPs) with hydrophobic coatings to magnetize plastic particulate waste for removal. We produced and tested IONPs synthesized using air-free conditions and in atmospheric air, coated with several polydimethylsiloxane (PDMS)-based hydrophobic coatings. Particles were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), superconducting quantum interference device (SQUID) magnetometry, dynamic light scattering (DLS), X-ray diffraction (XRD) and zeta potential. The IONPs synthesized in air contained a higher percentage of the magnetic spinel phase and stronger magnetization. Binding and recovery of NMPs from both salt and freshwater samples was demonstrated. Specifically, we were able to remove 100% of particles in a range of sizes, from 2-5 mm, and nearly 90% of nanoplastic particles with a size range from 100 nm to 1000 nm using a simple 2-inch permanent NdFeB magnet. Magnetization of NMPs using IONPs is a viable method for separation from water samples for quantification, characterization, and purification and remediation of water.
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Affiliation(s)
- Leisha M. A. Martin
- Department of Life Sciences, Texas A&M University, Corpus Christi, TX 78412, USA;
| | - Jian Sheng
- School of Engineering, Texas A&M University, Corpus Christi, TX 78412, USA;
| | - Paul V. Zimba
- Center for Coastal Studies, Texas A&M University, Corpus Christi, TX 78412, USA;
| | - Lin Zhu
- Irma Lerma Rangel College of Pharmacy, Texas A&M University, College Station, TX 77843, USA;
| | - Oluniyi O. Fadare
- Department of Physical & Environmental Sciences, Texas A&M University, Corpus Christi, TX 78412, USA; (O.O.F.); (C.H.); (J.C.)
| | - Carol Haley
- Department of Physical & Environmental Sciences, Texas A&M University, Corpus Christi, TX 78412, USA; (O.O.F.); (C.H.); (J.C.)
| | - Meichen Wang
- College of Veterinary Medicine and Biomedical Sciences, Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA; (M.W.); (T.D.P.)
| | - Timothy D. Phillips
- College of Veterinary Medicine and Biomedical Sciences, Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA; (M.W.); (T.D.P.)
| | - Jeremy Conkle
- Department of Physical & Environmental Sciences, Texas A&M University, Corpus Christi, TX 78412, USA; (O.O.F.); (C.H.); (J.C.)
| | - Wei Xu
- Department of Life Sciences, Texas A&M University, Corpus Christi, TX 78412, USA;
- Correspondence: ; Tel.: +361-825-2676
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Highly selective PDMS-PVDF composite membrane with hydrophobic crosslinking series for isopropanol-1,5 pentanediol pervaporation. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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40
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Huang X, Ge M, Wang H, Liang H, Meng N, Zhou N. Functional modification of polydimethylsiloxane nanocomposite with silver nanoparticles-based montmorillonite for antibacterial applications. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128666] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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41
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Novel Slippery Liquid-Infused Porous Surfaces (SLIPS) Based on Electrospun Polydimethylsiloxane/Polystyrene Fibrous Structures Infused with Natural Blackseed Oil. Int J Mol Sci 2022; 23:ijms23073682. [PMID: 35409042 PMCID: PMC8998331 DOI: 10.3390/ijms23073682] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/14/2022] [Accepted: 03/24/2022] [Indexed: 02/04/2023] Open
Abstract
Hydrophobic fibrous slippery liquid-infused porous surfaces (SLIPS) were fabricated by electrospinning polydimethylsiloxane (PDMS) and polystyrene (PS) as a carrier polymer on plasma-treated polyethylene (PE) and polyurethane (PU) substrates. Subsequent infusion of blackseed oil (BSO) into the porous structures was applied for the preparation of the SLIPS. SLIPS with infused lubricants can act as a repellency layer and play an important role in the prevention of biofilm formation. The effect of polymer solutions used in the electrospinning process was investigated to obtain well-defined hydrophobic fibrous structures. The surface properties were analyzed through various optical, macroscopic and spectroscopic techniques. A comprehensive investigation of the surface chemistry, surface morphology/topography, and mechanical properties was carried out on selected samples at optimized conditions. The electrospun fibers prepared using a mixture of PDMS/PS in the ratio of 1:1:10 (g/g/mL) using tetrahydrofuran (THF) solvent showed the best results in terms of fiber uniformity. The subsequent infusion of BSO into the fabricated PDMS/PS fiber mats exhibited slippery behavior regarding water droplets. Moreover, prepared SLIPS exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli bacterium strains.
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42
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Yang Y, Ma T, Zhang Q, Huang J, Hu Q, Li Y, Wang C, Zheng H. 3D Acoustic Manipulation of Living Cells and Organisms Based on 2D Array. IEEE Trans Biomed Eng 2022; 69:2342-2352. [PMID: 35025736 DOI: 10.1109/tbme.2022.3142774] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Flexible manipulation techniques for living cells and organisms are extremely useful tools for fundamental biomedical and life science research. Acoustic tweezers, which permit non-contact, label-free manipulation, are particularly suited to micromanipulation tasks as they provide a large acoustic radiation force and can be applied in various media. Here, we describe the design and fabrication of a 3 MHz, 64-element (8 8), 2D planar ultrasound array that realizes the multidimensional translation, rotation, orientation, and levitation of living cells and organisms. The focusing vortex and twin fields are generated using the holographic acoustic elements framework method. We demonstrate that the eggs and larvae of brine shrimp can be translated along a preset trajectory by controlling the central position of the vortex. By multiplexing counterclockwise vortices, clockwise vortices, and twin trap fields in a time sequence, the rotation direction of the shrimp eggs can be switched in real time, while non-spherical larvae can be reoriented. Moreover, the reflection of the acoustic beam can lift eggs and larvae from the bottom of the culture dish and further manipulate them in the vertical and horizontal directions. Additionally, we present quantitative analyses of the relationships between the shrimp-egg rotation frequency and the focal depth, topological charge of the vortex, and excitation voltage. These results indicate that acoustic tweezers based on 2D matrix arrays can realize complex and selective manipulation of living cells and organisms, thereby demonstrating their value for advancing research in the fields of cell assembly, tissue engineering, and micro-robot driving.
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43
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Enengl C, Lone SA, Unterweger C, Fürst C. Screening of spinning oils for melt‐spun lignin‐based carbon fiber precursors. J Appl Polym Sci 2022. [DOI: 10.1002/app.52134] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Christina Enengl
- Biobased Composites and Processes Wood K plus–Kompetenzzentrum Holz GmbH Linz Austria
| | - Shaukat Ali Lone
- Institute for Chemical Technology of Inorganic Materials (TIM) Johannes Kepler University Linz Linz Austria
| | - Christoph Unterweger
- Biobased Composites and Processes Wood K plus–Kompetenzzentrum Holz GmbH Linz Austria
| | - Christian Fürst
- Biobased Composites and Processes Wood K plus–Kompetenzzentrum Holz GmbH Linz Austria
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44
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Feng Q, An C, Chen Z, Yin J, Zhang B, Lee K, Wang Z. Investigation into the impact of aged microplastics on oil behavior in shoreline environments. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126711. [PMID: 34332489 DOI: 10.1016/j.jhazmat.2021.126711] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/01/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Understanding the interactions between oil and other particles in shoreline can help determine the environmental risk and cleanup strategy after oil spill. Nevertheless, far less has been known regarding the impact of aged MPs on oil behavior in the shoreline environment. In this study, the aging course of polyethylene (PE) in shaking seawater and ultraviolet (UV) radiation conditions was investigated. The seawater aging mainly affected the physical properties of MPs, increasing its surface pores and hydrophilicity. UV aging significantly affected both the physical and chemical properties of MPs, which increased its hydrophilicity and crystallinity, decreased its mean particle size and introduced oxygen-containing functional groups onto MPs. The two-dimensional correlation spectroscopy (2D COS) analysis confirmed the evolution of oxygen-containing functional groups from C-O to CO. The effects of aged MPs on oil behavior in water-sand system were further explored. The oil remaining percentages were non-linearly changed with the increasing aging degree of MPs. The particle size of the aqueous phase after washing was inversely related to the oil remaining percentage. Further FTIR analysis revealed that C-O and C-H functional groups played an important role in the process of oil adsorbed on MPs.
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Affiliation(s)
- Qi Feng
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
| | - Chunjiang An
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada.
| | - Zhi Chen
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
| | - Jianan Yin
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina S4S 0A2, Canada
| | - Baiyu Zhang
- Northern Region Persistent Organic Pollutant Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University, St. John's, NL A1B 3X5, Canada
| | - Kenneth Lee
- Fisheries and Oceans Canada, Ecosystem Science, Ottawa, ON K1A 0E6, Canada
| | - Zheng Wang
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
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Undvall Anand E, Magnusson C, Lenshof A, Ceder Y, Lilja H, Laurell T. Two-Step Acoustophoresis Separation of Live Tumor Cells from Whole Blood. Anal Chem 2021; 93:17076-17085. [PMID: 34913344 PMCID: PMC8717332 DOI: 10.1021/acs.analchem.1c04050] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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There is an unmet
clinical need to extract living circulating tumor
cells (CTCs) for functional studies and in vitro expansion
to enable drug testing and predict responses to therapy in metastatic
cancer. Here, we present a novel two-step acoustophoresis (A2) method for isolation of unfixed, viable cancer cells from red blood
cell (RBC) lysed whole blood. The A2 method uses an initial
acoustofluidic preseparation step to separate cells based on their
acoustic mobility. This acoustofluidic step enriches viable cancer
cells in a central outlet, but a significant number of white blood
cells (WBCs) remain in the central outlet fraction due to overlapping
acoustophysical properties of these viable cells. A subsequent purging
step was employed to remove contaminating WBCs through negative selection
acoustophoresis with anti-CD45-functionalized negative acoustic contrast
particles. We processed 1 mL samples of 1:1 diluted RBC lysed whole
blood mixed with 10 000 DU145 cells through the A2 method. Additional experiments were performed using 1000 DU145 cells
spiked into 1.5 × 106 WBCs in 1 mL of buffer to further
elucidate the dynamic range of the method. Using samples with 10 000
DU145 cells, we obtained 459 ± 188-fold depletion of WBC and
42% recovery of viable cancer cells. Based on spiked samples with
1000 DU145 cells, our cancer cell recovery was 28% with 247 ±
156-fold WBC depletion corresponding to a depletion efficacy of ≥99.5%.
The novel A2 method provides extensive elimination of WBCs
combined with the gentle recovery of viable cancer cells suitable
for downstream functional analyses and in vitro culture.
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Affiliation(s)
- Eva Undvall Anand
- Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden
| | - Cecilia Magnusson
- Department of Translational Medicine, Lund University, 205 02 Malmö, Sweden
| | - Andreas Lenshof
- Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden
| | - Yvonne Ceder
- Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
| | - Hans Lilja
- Department of Translational Medicine, Lund University, 205 02 Malmö, Sweden.,Department of Laboratory Medicine, Surgery (Urology), and Medicine (GU Oncology), Memorial Sloan-Kettering Cancer Center, New York, New York 10065, United States
| | - Thomas Laurell
- Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden
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Pharino U, Sinsanong Y, Pongampai S, Charoonsuk T, Pakawanit P, Sriphan S, Vittayakorn N, Vittayakorn W. Influence of pore morphologies on the mechanical and tribo-electrical performance of polydimethylsiloxane sponge fabricated via commercial seasoning templates. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Fluorine-free and hydrophobic/oleophilic PMMA/PDMS electrospun nanofibrous membranes for gravity-driven removal of water from oil-rich emulsions. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119720] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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48
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Hu Q, Ma T, Zhang Q, Wang J, Yang Y, Cai F, Zheng H. 3-D Acoustic Tweezers Using a 2-D Matrix Array With Time-Multiplexed Traps. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2021; 68:3646-3653. [PMID: 34280096 DOI: 10.1109/tuffc.2021.3098191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The use of acoustic tweezers for precise manipulation of microparticles in the aqueous environment is essential and challenging for biomechanical applications in vivo. A 3-D acoustic tweezer is developed in this study for 3-D manipulation by using a two-dimensional (2-D) phased array consisting of 256 elements operating at 1.04 MHz. The emission phases of each element are iteratively determined by a backpropagation algorithm to generate multiple acoustic traps. Different traps are multiplexed in time, thus forming synthesized acoustic fields. We demonstrate the 3-D levitation and translation of positive acoustic contrast particles, a major class of bioparticles, in water by different acoustic traps, and compare the positional deviation along the intended path via experimentally measured trajectories. Improved manipulating stability was achieved by multiplexed acoustic traps. The 3-D acoustic tweezers proposed in this study provide a versatile approach of contactless bioparticle trapping and translation, paving the way toward future application of nanodroplet and microbubble manipulations.
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49
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Hydrophobic Lightweight Cement with Thermal Shock Resistance and Thermal Insulating Properties for Energy-Storage Geothermal Well Systems. MATERIALS 2021; 14:ma14216679. [PMID: 34772203 PMCID: PMC8587425 DOI: 10.3390/ma14216679] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/26/2021] [Accepted: 11/02/2021] [Indexed: 11/17/2022]
Abstract
This study assessed the possibility of using polymethylhydrosiloxane (PMHS)-treated fly ash cenospheres (FCS) for formulating a thermally insulating and thermal shock (TS)-resistant cementitious blend with calcium aluminate cement. To prevent FCS degradation in an alkaline cement environment at high temperatures, the cenospheres were pre-treated with sodium metasilicate to form silanol and aluminol groups on their surface. These groups participated in a dehydrogenation reaction with the functional ≡Si–H groups within PMHS with the formation of siloxane oxygen-linked M-FCS (M: Al or Si). At high hydrothermal temperatures of 175 and 250 °C, some Si–O–Si and SiCH3 bonds ruptured, causing depolymerization of the polymer at the FCS surface and hydroxylation of the raptured sites with the formation of silanol groups. Repolymerization through self-condensation between the silanol groups followed, resulting in the transformation of siloxane to low crosslinked silicon-like polymer as a repolymerization-induced product (RIP) without carbon. The RIP provided adequate protection of FCS from pozzolanic reactions (PR), which was confirmed by the decline in zeolites as the products of PR of FCS. Cements with PMHS-treated FCS withstood both hydrothermal and thermal temperature of 250 °C in TS tests, and they also showed improved compressive strength, toughness, and water repellency as well as decreased thermal conductivity. The lubricating properties of PMHS increased the fluidity of lightweight slurries.
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Devendar L, Shijeesh MR, Sakorikar T, Ganapathi KL, Jaiswal M. Intercalated water mediated electromechanical response of graphene oxide films on flexible substrates. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 34:025001. [PMID: 34584030 DOI: 10.1088/1361-648x/ac2ad0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
The confinement of water between sub-nanometer bounding walls of layered two-dimensional materials has generated tremendous interest. Here, we examined the influence of confined water on the mechanical and electromechanical response of graphene oxide films, prepared with variable oxidative states, casted on polydimethylsiloxane substrates. These films were subjected to uniaxial strain under controlled humid environments (5 to 90% RH), while dc transport studies were performed in tandem. Straining resulted in the formation of quasi-periodic linear crack arrays. The extent of water intercalation determined the density of cracks formed in the system thereby, governing the electrical conductance of the films under strain. The crack density at 5% strain, varied from 0 to 3.5 cracks mm-1for hydrated films and 8 to 22 cracks mm-1for dry films, across films with different high oxidative states. Correspondingly, the overall change in the electrical conductance at 5% strain was observed to be ∼5 to 20 folds for hydrated films and ∼20 to 35 folds for the dry films. The results were modeled with a decrease in the in-plane elastic modulus of the film upon water intercalation, which was attributed to the variation in the nature of hydrogen bonding network in graphene oxide lamellae.
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Affiliation(s)
- Lavudya Devendar
- Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India
| | - M R Shijeesh
- Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India
| | - Tushar Sakorikar
- Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India
| | - K Lakshmi Ganapathi
- Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India
| | - Manu Jaiswal
- Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India
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