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Huang T, Su Z, Hou K, Zeng J, Zhou H, Zhang L, Nunes SP. Advanced stimuli-responsive membranes for smart separation. Chem Soc Rev 2023. [PMID: 37184537 DOI: 10.1039/d2cs00911k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Membranes have been extensively studied and applied in various fields owing to their high energy efficiency and small environmental impact. Further conferring membranes with stimuli responsiveness can allow them to dynamically tune their pore structure and/or surface properties for efficient separation performance. This review summarizes and discusses important developments and achievements in stimuli-responsive membranes. The most commonly utilized stimuli, including light, pH, temperature, ions, and electric and magnetic fields, are discussed in detail. Special attention is given to stimuli-responsive control of membrane pore structure (pore size and porosity/connectivity) and surface properties (wettability, surface topology, and surface charge), from the perspective of determining the appropriate membrane properties and microstructures. This review also focuses on strategies to prepare stimuli-responsive membranes, including blending, casting, polymerization, self-assembly, and electrospinning. Smart applications for separations are also reviewed as well as a discussion of remaining challenges and future prospects in this exciting field. This review offers critical insights for the membrane and broader materials science communities regarding the on-demand and dynamic control of membrane structures and properties. We hope that this review will inspire the design of novel stimuli-responsive membranes to promote sustainable development and make progress toward commercialization.
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Affiliation(s)
- Tiefan Huang
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Zhixin Su
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Kun Hou
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Jianxian Zeng
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Hu Zhou
- Functional Membrane Materials Engineering Research Center of Hunan Province, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Lin Zhang
- Engineering Research Center of Membrane and Water Treatment of MOE, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
- Academy of Ecological Civilization, Zhejiang University, Hangzhou, 310058, China
| | - Suzana P Nunes
- King Abdullah University of Science and Technology (KAUST), Nanostructured Polymeric Membranes Laboratory, Advanced Membranes and Porous Materials Center, Biological and Environmental Science and Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia.
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2
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Lee WS, Enomoto T, Akimoto AM, Yoshida R. Fabrication of submillimeter-sized spherical self-oscillating gels and control of their isotropic volumetric oscillatory behaviors. SOFT MATTER 2023; 19:1772-1781. [PMID: 36779908 DOI: 10.1039/d2sm01604d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In this study, we established a fabrication method and analyzed the volumetric self-oscillatory behaviors of submillimeter-sized spherical self-oscillating gels. We validated that the manufactured submillimeter-sized spherical self-oscillating gels exhibited isotropic volumetric oscillations during the Belousov-Zhabotinsky (BZ) reaction. In addition, we experimentally elucidated that the volumetric self-oscillatory behaviors (i.e., period and amplitude) and the oscillatory profiles depended on the following parameters: (1) the molar composition of N-(3-aminopropyl)methacrylamide hydrochloride (NAPMAm) in the gels and (2) the concentration of Ru(bpy)3-NHS solution containing an active ester group on conjugation. These clarified relationships imply that controlling the amount of Ru(bpy)3 in the gel network could influence the gel volumetric oscillation during the BZ reaction. These results of submillimeter-sized and spherical self-oscillating gels bridge knowledge gaps in the current field because the gels with corresponding sizes and shapes have not been systematically explored yet. Therefore, our study could be a cornerstone for diverse applications of (self-powered) gels in various scales and shapes, including soft actuators exhibiting life-like functions.
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Affiliation(s)
- Won Seok Lee
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Takafumi Enomoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Aya Mizutani Akimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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3
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Thermo-Responsive Hydrophilic Support for Polyamide Thin-Film Composite Membranes with Competitive Nanofiltration Performance. Polymers (Basel) 2022; 14:polym14163376. [PMID: 36015632 PMCID: PMC9414575 DOI: 10.3390/polym14163376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/11/2022] [Accepted: 08/13/2022] [Indexed: 11/17/2022] Open
Abstract
Poly(N-isopropylacrylamide) (PNIPAAm) was introduced into a polyethylene terephthalate (PET) nonwoven fabric to develop novel support for polyamide (PA) thin-film composite (TFC) membranes without using a microporous support layer. First, temperature-responsive PNIPAAm hydrogel was prepared by reactive pore-filling to adjust the pore size of non-woven fabric, creating hydrophilic support. The developed PET-based support was then used to fabricate PA TFC membranes via interfacial polymerization. SEM–EDX and AFM results confirmed the successful fabrication of hydrogel-integrated non-woven fabric and PA TFC membranes. The newly developed PA TFC membrane demonstrated an average water permeability of 1 L/m2 h bar, and an NaCl rejection of 47.0% at a low operating pressure of 1 bar. The thermo-responsive property of the prepared membrane was studied by measuring the water contact angle (WCA) below and above the lower critical solution temperature (LCST) of the PNIPAAm hydrogel. Results proved the thermo-responsive behavior of the prepared hydrogel-filled PET-supported PA TFC membrane and the ability to tune the membrane flux by changing the operating temperature was confirmed. Overall, this study provides a novel method to fabricate TFC membranes and helps to better understand the influence of the support layer on the separation performance of TFC membranes.
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Saez J, Catalan-Carrio R, Owens RM, Basabe-Desmonts L, Benito-Lopez F. Microfluidics and materials for smart water monitoring: A review. Anal Chim Acta 2021; 1186:338392. [PMID: 34756264 DOI: 10.1016/j.aca.2021.338392] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 01/03/2023]
Abstract
Water quality monitoring of drinking, waste, fresh and seawaters is of great importance to ensure safety and wellbeing for humans, fauna and flora. Researchers are developing robust water monitoring microfluidic devices but, the delivery of a cost-effective, commercially available platform has not yet been achieved. Conventional water monitoring is mainly based on laboratory instruments or sophisticated and expensive handheld probes for on-site analysis, both requiring trained personnel and being time-consuming. As an alternative, microfluidics has emerged as a powerful tool with the capacity to replace conventional analytical systems. Nevertheless, microfluidic devices largely use conventional pumps and valves for operation and electronics for sensing, that increment the dimensions and cost of the final platforms, reducing their commercialization perspectives. In this review, we critically analyze the characteristics of conventional microfluidic devices for water monitoring, focusing on different water sources (drinking, waste, fresh and seawaters), and their application in commercial products. Moreover, we introduce the revolutionary concept of using functional materials such as hydrogels, poly(ionic liquid) hydrogels and ionogels as alternatives to conventional fluidic handling and sensing tools, for water monitoring in microfluidic devices.
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Affiliation(s)
- Janire Saez
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Bioelectronic Systems Technology Group, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK.
| | - Raquel Catalan-Carrio
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Microfluidics Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain
| | - Róisín M Owens
- Bioelectronic Systems Technology Group, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Lourdes Basabe-Desmonts
- Microfluidics Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain; Basque Foundation for Science, IKERBASQUE, Spain; Bioaraba Health Research Institute, Microfluidics Cluster UPV/EHU, Vitoria-Gasteiz, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain.
| | - Fernando Benito-Lopez
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Bioaraba Health Research Institute, Microfluidics Cluster UPV/EHU, Vitoria-Gasteiz, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain.
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5
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Algarni F, Musteata VE, Falca G, Chisca S, Hadjichristidis N, Nunes SP. Thermo-Responsive Membranes from Blends of PVDF and PNIPAM- b-PVDF Block Copolymers with Linear and Star Architectures. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01372] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fatimah Algarni
- Physical Science and Engineering Division, Catalysis Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Valentina Elena Musteata
- Biological and Environmental Science and Engineering Division, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Gheorghe Falca
- Biological and Environmental Science and Engineering Division, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Stefan Chisca
- Biological and Environmental Science and Engineering Division, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Nikos Hadjichristidis
- Physical Science and Engineering Division, Catalysis Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Suzana P. Nunes
- Biological and Environmental Science and Engineering Division, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
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6
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7
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Tripathi T, Kamaz M, Wickramasinghe SR, Sengupta A. Designing Electric Field Responsive Ultrafiltration Membranes by Controlled Grafting of Poly (Ionic Liquid) Brush. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 17:E271. [PMID: 31906030 PMCID: PMC6981848 DOI: 10.3390/ijerph17010271] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/24/2019] [Accepted: 12/24/2019] [Indexed: 11/19/2022]
Abstract
Electric responsive membranes have been prepared by controlled surface grafting of poly (ionic liquid) (PIL) on the commercially available regenerated cellulose ultrafiltration membrane. The incorporation of imidazolium ring on membrane surface was evidenced by FTIR (Fourier transformed infra-red) and EDX (energy-dispersive X-ray) spectroscopy. The PIL grafting resultedin a rougher surface, reduction in pore size, and enhancement in hydrophilicity. The interaction of the electric field between the charged PIL brush and the oscillating external electric field leads to micromixing, and hence it is proposed to break the concentration polarization. This micromixing improves the antifouling properties of the responsive membranes. The local perturbation was found to decrease the water flux, while it enhanced protein rejection. At a higher frequency (1kHz) of the applied electric field, the localized heating predominates compared to micromixing. In the case of a lower frequency of the applied electric field, more perturbation can lead to less permeability, whereas it will have a better effect in breaking the concentration polarization. However, during localized heating at a higher frequency, though perturbation is less, a heating induced reduction in permeability was observed. The electric field response of the membrane was found to be reversible in nature, and hence has no memory effect.
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Affiliation(s)
- Tejas Tripathi
- Ralph E Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72703, USA; (T.T.); (M.K.); (S.R.W.)
| | - Mohanad Kamaz
- Ralph E Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72703, USA; (T.T.); (M.K.); (S.R.W.)
| | - S. Ranil Wickramasinghe
- Ralph E Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72703, USA; (T.T.); (M.K.); (S.R.W.)
| | - Arijit Sengupta
- Ralph E Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72703, USA; (T.T.); (M.K.); (S.R.W.)
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Chemical Sciences, Homi Bhabha National Institute, Mumbai 400094, India
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8
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Kuroki H, Gruzd A, Tokarev I, Patsahan T, Ilnytskyi J, Hinrichs K, Minko S. Biofouling-Resistant Porous Membranes with a Precisely Adjustable Pore Diameter via 3D Polymer Grafting. ACS APPLIED MATERIALS & INTERFACES 2019; 11:18268-18275. [PMID: 31033277 DOI: 10.1021/acsami.9b06679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A facile route to biofouling-resistant porous thin-film membranes that can be fine-tuned for specific needs in diverse bioseparation, mass flow control, sensors, and drug delivery applications is reported. The proposed approach is based on combining two distinct macromolecular systems-a cross-linked poly(2-vinyl pyridine) network and a 3D-grafted polyethylene oxide (PEO) layer-in one robust porous material whose porosity can be adjusted within a wide range, covering the macroporous and mesoporous size regimes. Notably, this reconfigurable material maintains its antifouling properties throughout the entire range of pore size configurations because of a dense surface carpet of PEO chains with self-healing properties that are immobilized both onto the surface and inside the polymer network through what was termed 3D grafting. Experimental results are supplemented by computer simulations of a coarse-grained model of a porous membrane that shows qualitatively similar pore swelling behavior.
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Affiliation(s)
- Hidenori Kuroki
- Department of Chemistry and Biomolecular Science , Clarkson University , Potsdam , New York 13699-5810 , United States
- Laboratory for Chemistry and Life Science , Tokyo Institute of Technology , R1-17, 4259 Nagatsuta , Midori-ku, Yokohama , Kanagawa 226-8503 , Japan
| | - Alexey Gruzd
- Nanostructured Materials Lab , University of Georgia , Athens , Georgia 30602 , United States
| | - Igor Tokarev
- Department of Chemistry and Biomolecular Science , Clarkson University , Potsdam , New York 13699-5810 , United States
| | - Taras Patsahan
- Department of Computer Simulations of Many-Particle Systems , Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine , Lviv 79011 , Ukraine
| | - Jaroslav Ilnytskyi
- Department of Computer Simulations of Many-Particle Systems , Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine , Lviv 79011 , Ukraine
| | - Karsten Hinrichs
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. , 12489 Berlin , Germany
| | - Sergiy Minko
- Department of Chemistry and Biomolecular Science , Clarkson University , Potsdam , New York 13699-5810 , United States
- Nanostructured Materials Lab , University of Georgia , Athens , Georgia 30602 , United States
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9
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Improvement of separation and transport performance of ultrafiltration membranes by magnetically active nanolayer. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Savchak O, Morrison T, Kornev KG, Kuksenok O. Controlling deformations of gel-based composites by electromagnetic signals within the GHz frequency range. SOFT MATTER 2018; 14:8698-8708. [PMID: 30335123 DOI: 10.1039/c8sm01207e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Using theoretical and computational modeling, we focus on dynamics of gels filled with uniformly dispersed ferromagnetic nanoparticles subjected to electromagnetic (EM) irradiation within the GHz frequency range. As a polymer matrix, we choose poly(N-isopropylacrylamide) gel, which has a low critical solution temperature and shrinks upon heating. When these composites are irradiated with a frequency close to the Ferro-Magnetic Resonance (FMR) frequency, the heating rate increases dramatically. The energy dissipation of EM signals within the magnetic nanoparticles results in the heating of the gel matrix. We show that the EM signal causes volume phase transitions, leading to large deformations of the sample for a range of system parameters. We propose a model that accounts for the dynamic coupling between the elastodynamics of the polymer gel and the FMR heating of magnetic nanoparticles. This coupling is nonlinear: when the system is heated, the gel shrinks during the volume phase transition, and the particle concentration increases, which in turn results in an increase of the heating rates as long as the concentration of nanoparticles does not exceed a critical value. We show that the system exhibits high selectivity to the frequency of the incident EM signal and can result in a large mechanical feedback in response to a small change in the applied signal. These results suggest the design of a new class of soft active gel-based materials remotely controlled by low power EM signals within the GHz frequency range.
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Affiliation(s)
- Oksana Savchak
- Materials Sciences and Engineering, Clemson University, Clemson, SC 29634, USA.
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11
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Jelken J, Pandiyarajan CK, Genzer J, Lomadze N, Santer S. Fabrication of Flexible Hydrogel Sheets Featuring Periodically Spaced Circular Holes with Continuously Adjustable Size in Real Time. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30844-30851. [PMID: 30114362 DOI: 10.1021/acsami.8b09580] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report on the formation of stimuli-responsive structured hydrogel thin films whose pattern geometry can be adjusted on demand and tuned reversibly by varying solvent quality or by changing temperature. The hydrogel films, ∼100 nm in thickness, were prepared by depositing layers of random copolymers comprising N-isopropylacrylamide and ultraviolet (UV)-active methacryloyloxybenzophenone units onto solid substrates. A two-beam interference pattern technique was used to cross-link the selected areas of the film; any unreacted material was extracted using ethanol after UV light-assisted cross-linking. In this way, we produced nanoholes, perfectly ordered structures with a narrow size distribution, negligible tortuosity, adjustable periodicity, and a high density. The diameter of the circular holes ranged from a few micrometers down to several tens of nanometers; the hole periodicity could be adjusted readily by changing the optical period of the UV interference pattern. The holes were reversibly closed and opened by swelling/deswelling the polymer networks in the presence of ethanol and water, respectively, at various temperatures. The reversible regulation of the hole diameter can be repeated many times within a few seconds. The hydrogel sheet with circular holes periodically arranged may also be transferred onto different substrates and be employed as tunable templates for the deposition of desired substances.
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Affiliation(s)
- Joachim Jelken
- Institute of Physics and Astronomy , University of Potsdam , 14476 Potsdam , Germany
| | - C K Pandiyarajan
- Department of Chemical & Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States
| | - Nino Lomadze
- Institute of Physics and Astronomy , University of Potsdam , 14476 Potsdam , Germany
| | - Svetlana Santer
- Institute of Physics and Astronomy , University of Potsdam , 14476 Potsdam , Germany
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12
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Büning D, Ennen-Roth F, Walter SV, Hennecke T, Ulbricht M. Potassium-sensitive poly(N-isopropylacrylamide)-based hydrogels for sensor applications. Polym Chem 2018. [DOI: 10.1039/c8py00490k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situcrosslinking polymerization of potassium sensitive hydrogels for advancedin vivosensor applications is studied in detail.
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Affiliation(s)
- Dominic Büning
- Lehrstuhl für Technische Chemie II
- Universität Duisburg-Essen
- 45141 Essen
- Germany
| | - Franka Ennen-Roth
- Lehrstuhl für Technische Chemie II
- Universität Duisburg-Essen
- 45141 Essen
- Germany
| | - Sarah Verena Walter
- Lehrstuhl für Technische Chemie II
- Universität Duisburg-Essen
- 45141 Essen
- Germany
| | - Tobias Hennecke
- Lehrstuhl für Technische Chemie II
- Universität Duisburg-Essen
- 45141 Essen
- Germany
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II
- Universität Duisburg-Essen
- 45141 Essen
- Germany
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13
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14
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Shadmehr S, Coleman M, Liu B, Liu J, Tang X(S. Reversible gating of ion transport through DNA-functionalized carbon nanotube membranes. RSC Adv 2017. [DOI: 10.1039/c6ra24827f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A robust carbon nanotube (CNT) membrane using DNA as the gatekeeper molecule to reversibly open and close CNT inner pores for ion transport.
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Affiliation(s)
- Samaneh Shadmehr
- Department of Chemistry & Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Michael Coleman
- Department of Chemistry & Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Biwu Liu
- Department of Chemistry & Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Juewen Liu
- Department of Chemistry & Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Xiaowu (Shirley) Tang
- Department of Chemistry & Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
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15
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Haefner S, Frank P, Langer E, Gruner D, Schmidt U, Elstner M, Gerlach G, Richter A. Chemically controlled micro-pores and nano-filters for separation tasks in 2D and 3D microfluidic systems. RSC Adv 2017. [DOI: 10.1039/c7ra07016k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chemically adapted size exclusion functionalities of PNIPAAm-based nano-filters or micro-pores for separation tasks in microfluidics is presented.
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Affiliation(s)
- Sebastian Haefner
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Philipp Frank
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Enrico Langer
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Denise Gruner
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Ulrike Schmidt
- Institute of Solid State Electronics
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Martin Elstner
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Gerald Gerlach
- Institute of Solid State Electronics
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Andreas Richter
- Institute for Semiconductors and Microsystems
- Department of Electrical and Computer Engineering
- Technische Universität Dresden
- 01062 Dresden
- Germany
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16
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Lin X, Nguyen Quoc B, Ulbricht M. Magnetoresponsive Poly(ether sulfone)-Based Iron Oxide cum Hydrogel Mixed Matrix Composite Membranes for Switchable Molecular Sieving. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29001-29014. [PMID: 27670686 DOI: 10.1021/acsami.6b09369] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Stimuli-responsive membranes that can adjust mass transfer and interfacial properties "on demand" have drawn large interest over the last few decades. Here, we designed and prepared a novel magnetoresponsive separation membrane with remote switchable molecular sieving effect by simple one-step and scalable nonsolvent induced phase separation (NIPS) process. Specifically, poly(ether sulfone) (PES) as matrix for an anisotropic membrane, prefabricated poly(N-isopropylacrylamide) (PNIPAAm) nanogel (NG) particles as functional gates, and iron oxide magnetic nanoparticles (MNP) as localized heaters were combined in a synergistic way. Before membrane casting, the properties of the building blocks, including swelling property and size distribution for NG, and magnetic property and heating efficiency for MNP, were investigated. Further, to identify optimal film casting conditions for membrane preparation by NIPS, in-depth rheological study of the effects of composition and temperature on blend dope solutions was performed. At last, a composite membrane with 10% MNP and 10% NG blended in a porous PES matrix was obtained, which showed a large, reversible, and stable magneto-responsivity. It had 9 times higher water permeability at the "on" state of alternating magnetic field (AMF) than at the "off"-state. Moreover, the molecular weight cutoff of such membrane could be reversibly shifted from ∼70 to 1750 kDa by switching off or on the external AMF, as demonstrated in dextran ultrafiltration tests. Overall, it has been proved that the molecular sieving performance of the novel mixed matrix composite membrane can be controlled by the swollen/shrunken state of PNIPAAm NG embedded in the nanoporous barrier layer of a PES-based anisotropic porous matrix, via the heat generation of nearby MNP. And the structure of such membrane can be tailored by the NIPS process conditions. Such membrane has potential as enabling material for remote-controlled drug release systems or devices for tunable fractionations of biomacromolecule/-particle mixtures.
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Affiliation(s)
- Xi Lin
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen , 45117 Essen, Germany
- Center for Nanointegration Duisburg-Essen , 47057 Duisburg, Germany
| | - Bao Nguyen Quoc
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen , 45117 Essen, Germany
- Center for Nanointegration Duisburg-Essen , 47057 Duisburg, Germany
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen , 45117 Essen, Germany
- Center for Nanointegration Duisburg-Essen , 47057 Duisburg, Germany
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Haq MA, Su Y, Wang D. Mechanical properties of PNIPAM based hydrogels: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:842-855. [PMID: 27770962 DOI: 10.1016/j.msec.2016.09.081] [Citation(s) in RCA: 275] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/13/2016] [Accepted: 09/29/2016] [Indexed: 11/26/2022]
Abstract
Materials which adjust their properties in response to environmental factors such as temperature, pH and ionic strength are rapidly evolving and known as smart materials. Hydrogels formed by smart polymers have various applications. Among the smart polymers, thermoresponsive polymer poly(N-isopropylacrylamide)(PNIPAM) is very important because of its well defined structure and property specially its temperature response is closed to human body and can be finetuned as well. Mechanical properties are critical for the performance of stimuli responsive hydrogels in diverse applications. However, native PNIPAM hydrogels are very fragile and hardly useful for any practical purpose. Intense researches have been done in recent decade to enhance the mechanical features of PNIPAM hydrogel. In this review, several strategies including interpenetrating polymer network (IPN), double network (DN), nanocomposite (NC) and slide ring (SR) hydrogels are discussed in the context of PNIPAM hydrogel.
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Affiliation(s)
- Muhammad Abdul Haq
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; Laboratory of Food Engineering, Department of Food Science & Technology, University of Karachi, Karachi, Pakistan
| | - Yunlan Su
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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Gajda M, Ulbricht M. Capillary pore membranes with grafted diblock copolymers showing reversibly changing ultrafiltration properties with independent response to ions and temperature. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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