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Liang H, Zhang X, Wang F, Li C, Yuan W, Meng W, Cheng Z, Dong Y, Shi X, Yan Y, Yi H, Shuai Y, Long Y. Bio-inspired micropatterned thermochromic hydrogel for concurrent smart solar transmission and rapid visible-light stealth at all-working temperatures. LIGHT, SCIENCE & APPLICATIONS 2024; 13:202. [PMID: 39168994 PMCID: PMC11339365 DOI: 10.1038/s41377-024-01525-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 06/13/2024] [Accepted: 07/10/2024] [Indexed: 08/23/2024]
Abstract
Thermochromic hydrogels exhibit a smart capacity for regulating solar spectrum transmission, enabling automatically change their transmissivity in response to the ambient temperature change. This has great importance for energy conservation purposes. Military and civilian emergency thermochromic applications require rapid visible-light stealth (VLS); however, concurrent smart solar transmission and rapid VLS is yet to be realized. Inspired by squid-skin, we propose a micropatterned thermochromic hydrogel (MTH) to realize the concurrent control of smart solar transmittance and rapid VLS at all-working temperatures. The MTH possesses two optical regulation mechanisms: optical property regulation and optical scattering, controlled by temperature and pressure, respectively. The introduced surface micropattern strategy can arbitrarily switch between normal and diffuse transmission, and the VLS response time is within 1 s compared with previous ~180 s. The MTH also has a high solar-transmission regulation range of 61%. Further, the MTH preparation method is scalable and cost-effective. This novel regulation mechanism opens a new pathway towards applications with multifunctional optical requirements.
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Affiliation(s)
- Huaxu Liang
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xinping Zhang
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Fuqiang Wang
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China.
| | - Chunzhe Li
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Weizhe Yuan
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Weifeng Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Ziming Cheng
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
- Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Yan Dong
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xuhang Shi
- Department of Environmental Engineering, Technical University of Denmark, Miljøvej 113, Kgs, Lyngby, 2800, Denmark
| | - Yuying Yan
- Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Hongliang Yi
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Yong Shuai
- School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin, 150001, China
| | - Yi Long
- Department of Electronic Engineering, the Chinese University of Hong Kong, New Territories, Hong Kong SAR, China.
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2
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Gao G, Hara M, Seki T, Takeoka Y. Synthesis of thermo-responsive polymer gels composed of star-shaped block copolymers by copper-catalyzed living radical polymerization and click reaction. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2024; 25:2302795. [PMID: 38361532 PMCID: PMC10868426 DOI: 10.1080/14686996.2024.2302795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 12/30/2023] [Indexed: 02/17/2024]
Abstract
In recent times, there has been a significant surge in research interest surrounding thermo-responsive water-soluble polyacrylamides, primarily due to their intriguing capability to undergo significant solubility changes in water. These polymers exhibit the remarkable ability to shift from a soluble to an insoluble state in response to temperature variations. The capacity of these polymers to dynamically respond to temperature changes opens up exciting avenues for designing smart materials with tunable properties, amplifying their utility across a spectrum of scientific and technological applications. Researchers have been particularly captivated by the potential applications of thermo-responsive water-soluble polyacrylamides in diverse fields such as drug delivery, gene carriers, tissue engineering, sensors, catalysis, and chromatography separation. This study reports the construction and functionalization of polymer gels consisting of a polymer network of polyacrylamide derivatives with nano-sized structural units. Specifically, thermo-responsive polymer gels were synthesized by combining well-defined star-shaped polymers composed of polyacrylamide derivatives with a multifunctional initiator and linking method through a self-accelerating click reaction. The polymerization system employed a highly living approach, resulting in polymer chains characterized by narrow molecular weight distributions. The method's high functionality facilitated the synthesis of a temperature-responsive block copolymer gel composed of N-isopropyl acrylamide (NIPA) and N-ethyl acrylamide (NEAA). The resulting polymer gel, comprising star-shaped block copolymers of NIPA and NEAA, showcases smooth volume changes with temperature jumps.
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Affiliation(s)
- Guohao Gao
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Nagoya, Japan
| | - Mitsuo Hara
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Nagoya, Japan
| | - Takahiro Seki
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Nagoya, Japan
| | - Yukikazu Takeoka
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Nagoya, Japan
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3
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Ansari M, Darvishi A, Sabzevari A. A review of advanced hydrogels for cartilage tissue engineering. Front Bioeng Biotechnol 2024; 12:1340893. [PMID: 38390359 PMCID: PMC10881834 DOI: 10.3389/fbioe.2024.1340893] [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: 11/19/2023] [Accepted: 01/29/2024] [Indexed: 02/24/2024] Open
Abstract
With the increase in weight and age of the population, the consumption of tobacco, inappropriate foods, and the reduction of sports activities in recent years, bone and joint diseases such as osteoarthritis (OA) have become more common in the world. From the past until now, various treatment strategies (e.g., microfracture treatment, Autologous Chondrocyte Implantation (ACI), and Mosaicplasty) have been investigated and studied for the prevention and treatment of this disease. However, these methods face problems such as being invasive, not fully repairing the tissue, and damaging the surrounding tissues. Tissue engineering, including cartilage tissue engineering, is one of the minimally invasive, innovative, and effective methods for the treatment and regeneration of damaged cartilage, which has attracted the attention of scientists in the fields of medicine and biomaterials engineering in the past several years. Hydrogels of different types with diverse properties have become desirable candidates for engineering and treating cartilage tissue. They can cover most of the shortcomings of other treatment methods and cause the least secondary damage to the patient. Besides using hydrogels as an ideal strategy, new drug delivery and treatment methods, such as targeted drug delivery and treatment through mechanical signaling, have been studied as interesting strategies. In this study, we review and discuss various types of hydrogels, biomaterials used for hydrogel manufacturing, cartilage-targeting drug delivery, and mechanosignaling as modern strategies for cartilage treatment.
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Affiliation(s)
- Mojtaba Ansari
- Department of Biomedical Engineering, Meybod University, Meybod, Iran
| | - Ahmad Darvishi
- Department of Biomedical Engineering, Meybod University, Meybod, Iran
| | - Alireza Sabzevari
- Department of Biomedical Engineering, Meybod University, Meybod, Iran
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4
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Kuroki S, Kubota M, Haraguchi R, Oishi Y, Narita T. Additive-Free Method for Enhancing the Volume Phase Transition Rate in Light-Responsive Hydrogels: A Study of Micro-Nano Bubble Water on PNIPAM-co-AAc Hydrogels. Gels 2023; 9:880. [PMID: 37998970 PMCID: PMC10671373 DOI: 10.3390/gels9110880] [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: 10/08/2023] [Revised: 10/27/2023] [Accepted: 11/04/2023] [Indexed: 11/25/2023] Open
Abstract
Light-responsive hydrogels containing light-thermal convertible pigments have received interest for their possible applications in light-responsive shutters, valves, drug delivery systems, etc. However, their utility is limited by the slow response time. In this study, we investigated the use of micro-nano bubble water as a preparation solvent to accelerate the volume phase transition kinetics of poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AAc) hydrogels. The hydrogels were characterized by dynamic light scattering (DLS) and dissolved oxygen (DO) measurements. The mechanical properties, surface morphology, and chemical composition of the hydrogels were analyzed by Young's modulus measurements, scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy, respectively. The results showed that hydrogels prepared with bubble water changed the volume transition rate by more than two orders of magnitude by simply changing the standing time of the bubble water for only a few hours. The cooperative diffusion coefficients obtained from the light-induced volume transition kinetics correlated linearly with Young's modulus and metastable state swelling ratio. Our results suggest that bubbles act as efficient water channels, thereby modulating the response rate and providing a simple, additive-free method for preparing hydrogels with a wide range of response rates.
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Affiliation(s)
| | | | | | | | - Takayuki Narita
- Department of Chemistry and Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, Japan
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5
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Islam HBMZ, Krishna SBN, Imran AB. Enhancing the mechanical properties of hydrogels with vinyl-functionalized nanocrystalline cellulose as a green crosslinker. NANOTECHNOLOGY 2023; 34:505706. [PMID: 37703871 DOI: 10.1088/1361-6528/acf93b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 09/12/2023] [Indexed: 09/15/2023]
Abstract
Hydrogels have gained significant attention in scientific communities for their versatile applications, but several challenges need to be addressed to exploit their potential fully. Conventional hydrogels suffer from poor mechanical strength, limiting their use in many applications. Moreover, the crosslinking agents used to produce them are often toxic, carcinogenic, and not bio-friendly. This study presents a novel approach to overcome these limitations by using bio-friendly modified nanocrystalline cellulose as a crosslinker to prepare highly stretchable and tough thermosensitive hydrogels. The surface of nanocrystalline cellulose was modified with 3-methacryloxypropyltrimethoxysilane (MPTS) to obtain modified nanocrystalline cellulose (M-NCC) crosslinker and used during free radical polymerization of thermosensitiveN-isopropyl acrylamide (NIPA) monomer to synthesize NIPA/M-NCC hydrogel. The resulting nanocomposite hydrogels exhibit superior mechanical, thermal, and temperature-responsive swelling properties compared to conventional hydrogels prepared with traditional bi-functionalN,N'-methylene bis (acrylamide) (MBA) as a crosslinker. The elongation at break, tensile strength, and toughness of the NIPA/M-NCC hydrogels significantly increase and Young's modulus decrease than conventional hydrogel. The designed M-NCC crosslinker could be utilized to improve the mechanical strength of any polymeric elastomer or hydrogel systems produced through chain polymerization.
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Affiliation(s)
| | - Suresh Babu Naidu Krishna
- Department of Biomedical and Clinical Technology, Durban University of Technology, Durban 4000, South Africa
- Institute of Water and Wastewater Technology, Durban University of Technology, Durban 4000, South Africa
| | - Abu Bin Imran
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
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6
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Karim MR, Harun-Ur-Rashid M, Imran AB. Effect of sizes of vinyl modified narrow-dispersed silica cross-linker on the mechanical properties of acrylamide based hydrogel. Sci Rep 2023; 13:5089. [PMID: 36991034 DOI: 10.1038/s41598-023-32185-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/23/2023] [Indexed: 03/31/2023] Open
Abstract
Polymeric hydrogel with the incorporation of nano to submicro-meter sized materials forms an exhilarating new generation of composite hydrogels. Most of the applications of hydrogels are in aqueous environments in which they swell to a very high degree. This emanates from low density of the polymer chains, making them highly inferior in terms of physical strength and their prospective applications. In order to address the weak mechanical properties, hydrogels have successfully prepared with high tensile strength and toughness by reinforcing the acrylamide (AAm) network with 3-methacryloxypropyltrimethoxysilane (MPTS) modified silica particles (MSiO2) as chemical cross-linker. The MSiO2 cross-linkers are prepared from narrow-dispersed silica particles (SiO2) of 100 nm, 200 nm, and 300 nm diameters to investigate the effect of cross-linker sizes on the mechanical strengths of hydrogels. The presence of MSiO2 remarkably increases the stretching ability and toughness of hydrogels compared to conventional hydrogels. The tensile strength, toughness, and Young's modulus of the hydrogel decrease from 30 to 11 kPa, 409 to 231 kJ/m3, and 0.16 to 0.11 kPa, respectively, while the SiO2 particle size increase from 100 to 300 nm and the concentration of AAm and MSiO2 (%) are kept constant. The compressive strength and toughness of the hydrogel decrease from 34 to 18 kPa and 6 to 4 kJ/m3, respectively, but the Young's modulus increases from 0.11 to 0.19 kPa. This work is excellent proof of regulating mechanical strength of hydrogel by adjusting the particle size of MSiO2 cross-linkers.
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Affiliation(s)
- Md Rezaul Karim
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh
- Department of Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur, 5200, Bangladesh
| | - Mohammad Harun-Ur-Rashid
- Department of Chemistry, International University of Business Agriculture and Technology, Dhaka, 1230, Bangladesh
| | - Abu Bin Imran
- Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh.
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7
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Guo J, Yao H, Li X, Chang L, Wang Z, Zhu W, Su Y, Qin L, Xu J. Advanced Hydrogel systems for mandibular reconstruction. Bioact Mater 2023; 21:175-193. [PMID: 36093328 PMCID: PMC9413641 DOI: 10.1016/j.bioactmat.2022.08.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/16/2022] [Accepted: 08/02/2022] [Indexed: 12/23/2022] Open
Abstract
Mandibular defect becomes a prevalent maxillofacial disease resulting in mandibular dysfunctions and huge psychological burdens to the patients. Considering the routine presence of oral contaminations and aesthetic restoration of facial structures, the current clinical treatments are however limited, incapable to reconstruct the structural integrity and regeneration, spurring the need for cost-effective mandibular tissue engineering. Hydrogel systems possess great merit for mandibular reconstruction with precise involvement of cells and bioactive factors. In this review, current clinical treatments and distinct mode(s) of mandible formation and pathological resorption are summarized, followed by a review of hydrogel-related mandibular tissue engineering, and an update on the advanced fabrication of hydrogels with improved mechanical property, antibacterial ability, injectable form, and 3D bioprinted hydrogel constructs. The exploration of advanced hydrogel systems will lay down a solid foundation for a bright future with more biocompatible, effective, and personalized treatment in mandibular reconstruction.
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Affiliation(s)
- Jiaxin Guo
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Hao Yao
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Xu Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Liang Chang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Zixuan Wang
- Department of Mechanical Engineering, Tsinghua University, Beijing, China
| | - Wangyong Zhu
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Yuxiong Su
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Ling Qin
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Corresponding author. Director of Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Jiankun Xu
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Corresponding author. Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China.
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8
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Ihsan AB, Imran AB, Susan MABH. Advanced Functional Polymers: Properties and Supramolecular Phenomena in Hydrogels and Polyrotaxane-based Materials. CHEMISTRY AFRICA 2023; 6:79-94. [DOI: 10.1007/s42250-022-00460-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/20/2022] [Indexed: 09/01/2023]
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9
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Controlling the LCST-Phase Transition in Azobenzene-Functionalized Poly ( N-Isopropylacrlyamide) Hydrogels by Light. Gels 2023; 9:gels9020075. [PMID: 36826244 PMCID: PMC9956105 DOI: 10.3390/gels9020075] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Poly(N-isopropylacrylamide) PNIPAAm hydrogels were modified with a new azobenzene-containing co-monomer. In this work, light responsiveness as an additional functionality, is conceptualized to induce two phase transitions in the same material, which can be controlled by light. For a hydrogel with merely 2.5 mol% of this co-monomer, the lower critical solution transition temperature (LCST) was lowered by 12 °C (to 20 °C) compared to PNIPAAm (LCST at 32 °C), as analyzed by differential scanning calorimetry (DSC). The untreated unimodal endotherm split into a bimodal peak upon irradiation with UV-light, giving a second onset due to the switched (Z) isomer-rich regions, LCST*H2.5%-(Z) = 26 °C. On irradiation with 450 nm, leading to the reverse (Z) to (E) isomerization, the endotherm was also reversible. Thus, a photo-switchable hydrogel whose LCST and structure are tunable with the hydrophobicity-hydrophilicity of the (E) and (Z) isomeric state of azobenzene was obtained. The influence of the increase in the mol% of azoacrylate on the LCST was evaluated via DSC, in combination with NMR studies, UV-vis spectroscopy and control experiments with linear polymers. The large light-driven modulation of the LCST adds bistability in thermoresponsive hydrogels, which may open diverse applications in the field of soft robotics actuators.
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10
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Okutan M, Coşkun R, Yalçın O, Babuçoğlu A, Demir A. Investigation of the Dielectric and Optic Properties of Rosehip Seed Extract Loaded Hydrogels. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Kwon D, Jochi Y, Okaya Y, Seki T, Satoh K, Kamigaito M, Hoshino T, Urayama K, Takeoka Y. Nonturbid Fast Temperature-Responsive Hydrogels with Homogeneous Three-Dimensional Networks by Two Types of Star Polymer Synthesis Methods. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00446] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- DoWoo Kwon
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yuto Jochi
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yuumi Okaya
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Takahiro Seki
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Kotaro Satoh
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Masami Kamigaito
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Taiki Hoshino
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-51982, Japan
| | - Kenji Urayama
- Department of Macromolecular Science & Engineering, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - Yukikazu Takeoka
- Department of Molecular & Macromolecular Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Alsaid Y, Wu S, Wu D, Du Y, Shi L, Khodambashi R, Rico R, Hua M, Yan Y, Zhao Y, Aukes D, He X. Tunable Sponge-Like Hierarchically Porous Hydrogels with Simultaneously Enhanced Diffusivity and Mechanical Properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008235. [PMID: 33829563 DOI: 10.1002/adma.202008235] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/07/2021] [Indexed: 06/12/2023]
Abstract
Crosslinked polymers and gels are important in soft robotics, solar vapor generation, energy storage, drug delivery, catalysis, and biosensing. However, their attractive mass transport and volume-changing abilities are diffusion-limited, requiring miniaturization to avoid slow response. Typical approaches to improving diffusion in hydrogels sacrifice mechanical properties by increasing porosity or limit the total volumetric flux by directionally confining the pores. Despite tremendous efforts, simultaneous enhancement of diffusion and mechanical properties remains a long-standing challenge hindering broader practical applications of hydrogels. In this work, cononsolvency photopolymerization is developed as a universal approach to overcome this swelling-mechanical property trade-off. The as-synthesized poly(N-isopropylacrylamide) hydrogel, as an exemplary system, presents a unique open porous network with continuous microchannels, leading to record-high volumetric (de)swelling speeds, almost an order of magnitude higher than reported previously. This swelling enhancement comes with a simultaneous improvement in Young's modulus and toughness over conventional hydrogels fabricated in pure solvents. The resulting fast mass transport enables in-air operation of the hydrogel via rapid water replenishment and ultrafast actuation. The method is compatible with 3D printing. The generalizability is demonstrated by extending the technique to poly(N-tertbutylacrylamide-co-polyacrylamide) and polyacrylamide hydrogels, non-temperature-responsive polymer systems, validating the present hypothesis that cononsolvency is a generic phenomenon driven by competitive adsorption.
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Affiliation(s)
- Yousif Alsaid
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Shuwang Wu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Dong Wu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yingjie Du
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Lingxia Shi
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Roozbeh Khodambashi
- The Polytechnic School, Fulton School of Engineering, Arizona State University, Mesa, AZ, 85 212, USA
| | - Rossana Rico
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Mutian Hua
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yichen Yan
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yusen Zhao
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Daniel Aukes
- The Polytechnic School, Fulton School of Engineering, Arizona State University, Mesa, AZ, 85 212, USA
| | - Ximin He
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
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13
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Liu C, Lei F, Li P, Wang K, Jiang J. A review on preparations, properties, and applications of cis-ortho-hydroxyl polysaccharides hydrogels crosslinked with borax. Int J Biol Macromol 2021; 182:1179-1191. [PMID: 33895176 DOI: 10.1016/j.ijbiomac.2021.04.090] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/15/2021] [Accepted: 04/15/2021] [Indexed: 10/21/2022]
Abstract
Polysaccharides-based hydrogel has many advantages such as biocompatibility, self-repair property, and biodegradability. It has been widely applied in various fields and has attracted great attention of researchers. The natural polysaccharides involved in this review include fenugreek gum, guar gum, locust bean gum, gellan gum, sodium alginate, agarose, and konjac glucomannan etc. Borax is a highly effective crosslinking agent for cis-ortho-hydroxyl polysaccharides. This paper focused on the synthesis mechanism, functional additives, characteristics, and applications of borax crosslinked cis-ortho-hydroxyl polysaccharides hydrogels (BHs). Moreover, the factors affecting BHs performance such as temperature, pH, and media were analyzed. Its mechanical and self-repair properties are enhanced by the dynamic and reversible borate/di-diol, which play a significant role in sensors, biomedicine, and tissue engineering. This review summarizes the research progress of BHs for the first time. Additionally, hoping to contribute to the development of this field, the review analyzes the correlation of performance through the SPSS 26 software.
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Affiliation(s)
- Chuanjie Liu
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, PR China
| | - Fuhou Lei
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning 530006, PR China
| | - Pengfei Li
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning 530006, PR China
| | - Kun Wang
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, PR China
| | - Jianxin Jiang
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, PR China.
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Molecular dynamics of poly(2-(2-methoxyethoxy)ethyl methacrylate) hydrogels studied by broadband dielectric spectroscopy. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Ahmed MK, Kumer A, Imran AB. Facile fabrication of polymer network using click chemistry and their computational study. ROYAL SOCIETY OPEN SCIENCE 2021; 8:202056. [PMID: 33959358 PMCID: PMC8074938 DOI: 10.1098/rsos.202056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Click reaction is a very fast, high yield with no by-product, biocompatible, tolerant to surrounded medium, and very specific cycloaddition reaction between azides and alkynes to form triazole. They are widely being employed in the synthesis of various polymeric materials. Here, the design, fabrication and characterization of hydrogel prepared using click reaction have been reported. At first, telechelic acetylene precursor for click reaction is prepared from diisocyanatohexane and propargyl alcohol in the presence of triethylamine. The azide derivatives of poly(hydroxyethylmethacrylate), i.e. poly(HEMA), are successfully prepared following two different routes. In route 1, esterification of bromopropionic acid is performed with HEMA monomer using N,N'-dicyclohexylcarbodiimide/4-dimethylaminopyridine (DCC/DMAP) as a catalyst followed by replacing bromide by azide moiety. Free radical polymerization of the fabricated monomer is then performed under N2 atmosphere using azobisisobutyronitrile (AIBN) as an initiator. In route 2, polymerization of HEMA has been carried out first, then modification of the polymer with azide group via successive steps to obtain azide derivative polymer for click reaction. The hydrogel is prepared by a very fast, highly specific, and simple click reaction between azide derivative polymer and telechelic acetylene precursor using copper as a catalyst. The structures of derivatives of azide-functionalized HEMA, acetylene precursors and hydrogels are confirmed by FTIR and 1H-NMR spectroscopy. The optimized structure of each precursor is determined, and their chemical and thermodynamic parameters are computationally studied in detail.
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Affiliation(s)
- Md. Kausar Ahmed
- Department of Chemistry, Faculty of Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Ajoy Kumer
- Department of Chemistry, Faculty of Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Abu Bin Imran
- Department of Chemistry, Faculty of Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
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16
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Khodambashi R, Alsaid Y, Rico R, Marvi H, Peet MM, Fisher RE, Berman S, He X, Aukes DM. Heterogeneous Hydrogel Structures with Spatiotemporal Reconfigurability using Addressable and Tunable Voxels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005906. [PMID: 33491825 DOI: 10.1002/adma.202005906] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Stimuli-responsive hydrogels can sense environmental cues and change their volume accordingly without the need for additional sensors or actuators. This enables a significant reduction in the size and complexity of resulting devices. However, since the responsive volume change of hydrogels is typically uniform, their robotic applications requiring localized and time-varying deformations have been challenging to realize. Here, using addressable and tunable hydrogel building blocks-referred to as soft voxel actuators (SVAs)-heterogeneous hydrogel structures with programmable spatiotemporal deformations are presented. SVAs are produced using a mixed-solvent photopolymerization method, utilizing a fast reaction speed and the cononsolvency property of poly(N-isopropylacrylamide) (PNIPAAm) to produce highly interconnected hydrogel pore structures, resulting in tunable swelling ratio, swelling rate, and Young's modulus in a simple, one-step casting process that is compatible with mass production of SVA units. By designing the location and swelling properties of each voxel and by activating embedded Joule heaters in the voxels, spatiotemporal deformations are achieved, which enables heterogeneous hydrogel structures to manipulate objects, avoid obstacles, generate traveling waves, and morph to different shapes. Together, these innovations pave the way toward tunable, untethered, and high-degree-of-freedom hydrogel robots that can adapt and respond to changing conditions in unstructured environments.
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Affiliation(s)
- Roozbeh Khodambashi
- The Polytechnic School, Fulton Schools of Engineering, Arizona State University, Mesa, AZ, 85212, USA
| | - Yousif Alsaid
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Rossana Rico
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hamid Marvi
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Matthew M Peet
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Rebecca E Fisher
- Department of Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, AZ, 85004, USA
- School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Spring Berman
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Ximin He
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Daniel M Aukes
- The Polytechnic School, Fulton Schools of Engineering, Arizona State University, Mesa, AZ, 85212, USA
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17
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Bui TQ, Cao VD, Wang W, Kjøniksen AL. Recovered Energy from Salinity Gradients Utilizing Various Poly(Acrylic Acid)-Based Hydrogels. Polymers (Basel) 2021; 13:polym13040645. [PMID: 33671592 PMCID: PMC7926844 DOI: 10.3390/polym13040645] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 01/08/2023] Open
Abstract
Hydrogels can be utilized to extract energy from salinity gradients when river water mixes with seawater. Saline-sensitive hydrogels exhibit a reversible swelling/shrinking process when they are, alternately, exposed to fresh and saline water. We present a comparison of several poly(acrylic acid)-based hydrogels, including poly(acrylic acid) (PAA), poly(acrylic acid-co-vinylsulfonic acid) (PAA/PVSA), and poly(4-styrenessulfonic acid-co-maleic acid) interpenetrated in a poly(acrylic acid) network (PAA/PSSA-MA). The hydrogels were synthesized by free radical polymerization, copolymerization, and by semi-IPN (interpenetrating polymer network). The hydrogels were placed in a piston-like system to measure the recovered energy. Semi-IPN hydrogels exhibit a much higher recovered energy compared to the copolymer and PAA hydrogel. The recovered energy of 60 g swollen gel was up to 4 J for the PAA/PSSA-MA hydrogel. The obtained energy per gram dried gel was up to 13.3 J/g. The swelling volume of the hydrogels was maintained for 30 cycles without decline in recovered energy.
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Affiliation(s)
- Tri Quang Bui
- Faculty of Engineering, Østfold University College, P.O. Box 700, 1757 Halden, Norway; (T.Q.B.); (V.D.C.)
- Department of Chemistry & Center for Pharmacy, University of Bergen, P.O. Box 7803, 5020 Bergen, Norway;
| | - Vinh Duy Cao
- Faculty of Engineering, Østfold University College, P.O. Box 700, 1757 Halden, Norway; (T.Q.B.); (V.D.C.)
| | - Wei Wang
- Department of Chemistry & Center for Pharmacy, University of Bergen, P.O. Box 7803, 5020 Bergen, Norway;
| | - Anna-Lena Kjøniksen
- Faculty of Engineering, Østfold University College, P.O. Box 700, 1757 Halden, Norway; (T.Q.B.); (V.D.C.)
- Correspondence:
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18
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Leslie KA, Doane-Solomon R, Arora S, Curley SJ, Szczepanski C, Driscoll MM. Gel rupture during dynamic swelling. SOFT MATTER 2021; 17:1513-1520. [PMID: 33367435 DOI: 10.1039/d0sm01718c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydrogels have had a profound impact in the fields of tissue engineering, drug delivery, and materials science as a whole. Due to the network architecture of these materials, imbibement with water often results in uniform swelling and isotropic expansion which scales with the degree of cross-linking. However, the development of internal stresses during swelling can have dramatic consequences, leading to surface instabilities as well as rupture or bursting events. To better understand hydrogel behavior, macroscopic mechanical characterization techniques (e.g. tensile testing, rheometry) are often used, however most commonly these techniques are employed on samples that are in two distinct states: (1) unswollen and without any solvent, or (2) in an equilibrium swelling state where the maximum amount of water has been imbibed. Rarely is the dynamic process of swelling studied, especially in samples where rupture or failure events are observed. To address this gap, here we focus on rupture events in poly(ethylene glycol)-based networks that occur in response to swelling with water. Rupture events were visualized using high-speed imaging, and the influence of swelling on material properties was characterized using dynamic mechanical analysis. We find that rupture events follow a three-stage process that includes a waiting period, a slow fracture period, and a final stage in which a rapid increase in the velocity of crack propagation is observed. We describe this fracture behavior based on changes in material properties that occur during swelling, and highlight how this rupture behavior can be controlled by straight-forward modifications to the hydrogel network structure.
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Affiliation(s)
- Kelsey-Ann Leslie
- Department of Physics and Astronomy, Northwestern University, Evanston, IL, USA.
| | - Robert Doane-Solomon
- Department of Physics and Astronomy, Northwestern University, Evanston, IL, USA. and Department of Physics, University of Oxford, Oxford, UK
| | - Srishti Arora
- Department of Physics and Astronomy, Northwestern University, Evanston, IL, USA.
| | - Sabrina J Curley
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, USA
| | - Caroline Szczepanski
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, USA
| | - Michelle M Driscoll
- Department of Physics and Astronomy, Northwestern University, Evanston, IL, USA.
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19
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20
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Rezaul Karim M, Harun‐Ur‐Rashid M, Imran AB. Highly Stretchable Hydrogel Using Vinyl Modified Narrow Dispersed Silica Particles as Cross‐Linker. ChemistrySelect 2020. [DOI: 10.1002/slct.202003044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Md. Rezaul Karim
- Department of Chemistry Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
| | - Mohammad Harun‐Ur‐Rashid
- Department of Chemistry International University of Business Agriculture and Technology Dhaka 1230 Bangladesh
| | - Abu Bin Imran
- Department of Chemistry Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
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21
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Rahman A, Solaiman, Foyez T, Susan MABH, Imran AB. Self‐Healable and Conductive Double‐Network Hydrogels with Bioactive Properties. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Aminur Rahman
- Department of ChemistryFaculty of EngineeringBangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
| | - Solaiman
- Department of ChemistryFaculty of EngineeringBangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
| | - Tahmina Foyez
- Department of Pharmaceutical SciencesSchool of Health & Life SciencesNorth South University Dhaka 1229 Bangladesh
| | | | - Abu Bin Imran
- Department of ChemistryFaculty of EngineeringBangladesh University of Engineering and Technology Dhaka 1000 Bangladesh
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22
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23
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Gupta N, Liang YN, Lim JSK, Hu X. Design Rationale for Stimuli-Responsive, Semi-interpenetrating Polymer Network Hydrogels-A Quantitative Approach. Macromol Rapid Commun 2020; 41:e2000199. [PMID: 32588521 DOI: 10.1002/marc.202000199] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/02/2020] [Indexed: 12/18/2022]
Abstract
Stimuli-responsive semi-interpenetrating polymer network (semi-IPN) hydrogels form an important class of polymers for their tunable properties via molecular design. They are widely investigated for a diverse range of applications including drug delivery, sensors, actuators, and osmotic agents. However, in-depth studies on some of the critical design principles affecting diffusion/leaching of linear polymer from semi-IPN hydrogels are lacking. Herein, for the first time, by preparing a series of model semi-IPN hydrogels based on thermally responsive poly (N-isopropyl acrylamide) (PNIPAM) network and linear poly(sodium acrylate) (PSA), a systematic and quantitative study concerning linear polymer chain retention and swelling/deswelling kinetics is reported. The study shows that PSA retention is significantly affected not only by PSA molecular weight and concentration, but also by polymerization temperature, which could be linked to homogeneity and internal morphology of the hydrogel. Surprisingly, there is no obvious influence of crosslinking density of PNIPAM network toward PSA retention, while faster swelling and deswelling at higher crosslinking density are observed in terms of swelling rate constant and deswelling activation energy. These findings offer new insights on the factors affecting structural and physicochemical properties of such semi-IPN hydrogels, which should in turn serve as a general guideline for materials design.
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Affiliation(s)
- Nupur Gupta
- Nanyang Environmental & Water Research Institute, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Yen Nan Liang
- Nanyang Environmental & Water Research Institute, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Jacob Song Kiat Lim
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiao Hu
- Nanyang Environmental & Water Research Institute, 1 Cleantech Loop, Singapore, 637141, Singapore.,School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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24
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Sinawang G, Osaki M, Takashima Y, Yamaguchi H, Harada A. Biofunctional hydrogels based on host–guest interactions. Polym J 2020. [DOI: 10.1038/s41428-020-0352-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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25
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Wang Y, Wu J, Cao Z, Ma C, Tong Q, Li J, Liu H, Zheng J, Huang G. Mechanically robust, notch-insensitive, fatigue resistant and self-recoverable hydrogels with homogeneous and viscoelastic network constructed by a novel multifunctional cross-linker. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121661] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Darafarin M, Eslami H, Raoufian E. Electropolymerization of styrene in alcoholic solution and preparation of its bilayer with polyacrylamide. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-018-2514-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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Azimi Dijvejin Z, Ghaffarkhah A, Sadeghnejad S, Vafaie Sefti M. Effect of silica nanoparticle size on the mechanical strength and wellbore plugging performance of SPAM/chromium (III) acetate nanocomposite gels. Polym J 2019. [DOI: 10.1038/s41428-019-0178-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Poly(N,N-dimethylacrylamide)-clay nanocomposite hydrogels with patterned mechanical properties. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04486-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Liu S, Moore AC, Zerdoum AB, Zhang H, Scinto SL, Zhang H, Gong L, Burris DL, Rajasekaran AK, Fox JM, Jia X. Cellular interactions with hydrogel microfibers synthesized via interfacial tetrazine ligation. Biomaterials 2018; 180:24-35. [PMID: 30014964 PMCID: PMC6091885 DOI: 10.1016/j.biomaterials.2018.06.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/05/2018] [Accepted: 06/30/2018] [Indexed: 12/12/2022]
Abstract
Fibrous proteins found in the natural extracellular matrix (ECM) function as host substrates for migration and growth of endogenous cells during wound healing and tissue repair processes. Although various fibrous scaffolds have been developed to recapitulate the microstructures of the native ECM, facile synthesis of hydrogel microfibers that are mechanically robust and biologically active have been elusive. Described herein is the use of interfacial bioorthogonal polymerization to create hydrogel-based microfibrous scaffolds via tetrazine ligation. Combination of a trifunctional strained trans-cyclooctene monomer and a difunctional s-tetrazine monomer at the oil-water interface led to the formation of microfibers that were stable under cell culture conditions. The bioorthogonal nature of the synthesis allows for direct incorporation of tetrazine-conjugated peptides or proteins with site-selectively, genetically encoded tetrazines. The microfibers provide physical guidance and biochemical signals to promote the attachment, division and migration of fibroblasts. Mechanistic investigations revealed that fiber-guided cell migration was both F-actin and microtubule-dependent, confirming contact guidance by the microfibers. Prolonged culture of fibroblasts in the presence of an isolated microfiber resulted in the formation of a multilayered cell sheet wrapping around the fiber core. A fibrous mesh provided a 3D template to promote cell infiltration and tissue-like growth. Overall, the bioorthogonal approach led to the straightforward synthesis of crosslinked hydrogel microfibers that can potentially be used as instructive materials for tissue repair and regeneration.
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Affiliation(s)
- Shuang Liu
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Axel C Moore
- Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA
| | - Aidan B Zerdoum
- Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA
| | - Han Zhang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Samuel L Scinto
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - He Zhang
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Liang Gong
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - David L Burris
- Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA
| | | | - Joseph M Fox
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA; Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
| | - Xinqiao Jia
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA; Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA.
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30
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Pan Y, Li B, Liu Z, Yang Z, Yang X, Shi K, Li W, Peng C, Wang W, Ji X. Superfast and Reversible Thermoresponse of Poly( N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges. ACS APPLIED MATERIALS & INTERFACES 2018; 10:32747-32759. [PMID: 30157634 DOI: 10.1021/acsami.8b12395] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Poly( N-isopropylacrylamide) (PNIPAAm), a typical thermoresponsive polymer, exhibits potential application in smart materials. However, bulk PNIPAAm hydrogel monoliths undergo slow volume phase transition at least tens of minutes to hours as determined by the shape and size of polymers due to the formation of the skin layer. In this regard, novel macroporous sponges with rapid thermoresponse are prepared via grafting polymerization of N-isopropylacrylamide (NIPAAm) onto the macroporous poly(vinyl alcohol) formaldehyde (PVF) network as confirmed by attenuated total reflection-infrared (ATR IR) and 1H NMR spectra. As prepared PVF- g-PNIPAAm sponges display interconnected open-cell structures, and their average pore sizes and porosities are ∼90 μm and >85%, respectively. The equilibrium swelling ratio of PVF- g-PNIPAAm sponges varies from 11 to 50 with temperature. The volume phase transition temperature is at 30-34 °C, as detected in the DSC curves of swollen samples. These features indicate that the existence of the original PVF network exerts almost no influence on the PNIPAAm temperature responsibility. As prepared samples can reach the swelling equilibrium in less than 80 s, and their rapid swelling kinetics can be fitted using the pseudo-first-order rate kinetic equation. Notably, the samples also display rapid deswelling rate in less than 40 s at relative high temperature (48 °C), thereby indicating a superfast responsive behavior to temperature change. The PVF- g-PNIPAAm sponges exhibit rapid and reversible thermoresponse in repeatable swelling-deswelling cycles, which can satisfy the need of special smart materials. In particular, combined with iodine solution (i.e., PVF- g-PNIPAAm/I2), these sponges can serve as a novel temperature indicator and exhibit excellent antibacterial performances.
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Affiliation(s)
- Yanxiong Pan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Bingrui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Zhi Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Zhongyu Yang
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Xu Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Kai Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Wei Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Chao Peng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Weicai Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Xiangling Ji
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
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31
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Liu Z, Faraj Y, Ju XJ, Wang W, Xie R, Chu LY. Nanocomposite smart hydrogels with improved responsiveness and mechanical properties: A mini review. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24723] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhuang Liu
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Yousef Faraj
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Xiao-Jie Ju
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Wei Wang
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Rui Xie
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Liang-Yin Chu
- School of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
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32
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Chorazewicz K, Sundrani S, Ahn BK. Bioinspired Functional Gradients for Toughness Augmentation in Synthetic Polymer Systems. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kayetan Chorazewicz
- Marine Science Institute; University of California; Santa Barbara CA 93106 USA
| | - Sameer Sundrani
- Marine Science Institute; University of California; Santa Barbara CA 93106 USA
| | - B. Kollbe Ahn
- Marine Science Institute; University of California; Santa Barbara CA 93106 USA
- Chemistry; University of Central Florida; Orlando FL 32816 USA
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33
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Zhang Y, Ji J, Li H, Du N, Song S, Hou W. Synthesis of layered double hydroxide/poly(N-isopropylacrylamide) nanocomposite hydrogels with excellent mechanical and thermoresponsive performances. SOFT MATTER 2018; 14:1789-1798. [PMID: 29442126 DOI: 10.1039/c8sm00081f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanocomposite (NC) hydrogels of positively charged layered double hydroxide (LDH) single-layer nanosheet (SLNS) cross-linked poly(N-isopropylacrylamide) (PNIPAM) were synthesized. Especially, the LDH SLNSs used here were pre-synthesized via an aqueous synthetic route without using organic solvents and modifiers. The obtained LDH/PNIPAM NC hydrogels were characterized using XRD, SEM, TEM, and DSC. The mechanical and thermoresponsive properties were determined using tensile, compression, and swelling/deswelling tests. Interestingly, different network structures are observed for the NC hydrogels along the horizontal and vertical directions; those along the horizontal direction exhibit a fine and uniform sponge-like network structure while those along the vertical direction exhibit a hierarchical layered architecture. Compared with the conventional N,N'-methylene bisacrylamide cross-linked PNIPAM hydrogel, the NC hydrogels exhibit extraordinary deformability and stretchability and obviously improved thermoresponsive swelling/deswelling characteristics. Furthermore, the fracture elongation observed here is obviously higher than those reported for negatively charged clay/PNIPAM NC hydrogels. With the increase in the LDH content from 0.8 to 2.0 wt%, the fracture strength and the compressive strength at an 85% strain increase from 23.5 to 37.2 kPa and from 0.15 to 0.57 MPa, respectively, while the fracture elongation decreases from 2689 to 2202%. The mechanism for the improved mechanical performances of the NC hydrogels is discussed. To the best of our knowledge, this is the first report on LDH/PNIPAM hydrogels. This work provides a green synthesis route for LDH-containing NC hydrogels. The new NC hydrogels may have great potential applications such as in tissue engineering, drug vehicles, and sorbents.
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Affiliation(s)
- Yaping Zhang
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan, 250100, China.
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34
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Xiong Y, Dayal P, Balazs AC, Kuksenok O. Phase Transitions and Pattern Formation in Chemo-Responsive Gels and Composites. Isr J Chem 2018. [DOI: 10.1002/ijch.201700137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yao Xiong
- Department of Materials Science and Engineering; Clemson University, Clemson, South Carolina; 29634 United States
| | - Pratyush Dayal
- Department of Chemical Engineering; Indian Institute of Technology, Gandhinagar; 382424 India
| | - Anna C. Balazs
- Department of Chemical Engineering; University of Pittsburgh, Pittsburgh, Pennsylvania; 15261 United States
| | - Olga Kuksenok
- Department of Materials Science and Engineering; Clemson University, Clemson, South Carolina; 29634 United States
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35
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De France KJ, Xu F, Hoare T. Structured Macroporous Hydrogels: Progress, Challenges, and Opportunities. Adv Healthc Mater 2018; 7. [PMID: 29195022 DOI: 10.1002/adhm.201700927] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/15/2017] [Indexed: 12/15/2022]
Abstract
Structured macroporous hydrogels that have controllable porosities on both the nanoscale and the microscale offer both the swelling and interfacial properties of bulk hydrogels as well as the transport properties of "hard" macroporous materials. While a variety of techniques such as solvent casting, freeze drying, gas foaming, and phase separation have been developed to fabricate structured macroporous hydrogels, the typically weak mechanics and isotropic pore structures achieved as well as the required use of solvent/additives in the preparation process all limit the potential applications of these materials, particularly in biomedical contexts. This review highlights recent developments in the field of structured macroporous hydrogels aiming to increase network strength, create anisotropy and directionality within the networks, and utilize solvent-free or additive-free fabrication methods. Such functional materials are well suited for not only biomedical applications like tissue engineering and drug delivery but also selective filtration, environmental sorption, and the physical templating of secondary networks.
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Affiliation(s)
- Kevin J. De France
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
| | - Fei Xu
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
| | - Todd Hoare
- Department of Chemical Engineering; McMaster University; 1280 Main Street West Hamilton ON L8S 4L8 Canada
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36
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Fadeev M, Davidson-Rozenfeld G, Biniuri Y, Yakobi R, Cazelles R, Aleman-Garcia MA, Willner I. Redox-triggered hydrogels revealing switchable stiffness properties and shape-memory functions. Polym Chem 2018. [DOI: 10.1039/c8py00515j] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Metal-ion terpyridine-crosslinked acrylamide hydrogels or metal-ion-bridged carboxymethylcellulose hydrogels reveal redox-switchable stiffness and shape-memory properties.
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Affiliation(s)
- Michael Fadeev
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Gilad Davidson-Rozenfeld
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Yonatan Biniuri
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Ravit Yakobi
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Rémi Cazelles
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Miguel Angel Aleman-Garcia
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Itamar Willner
- Institute of Chemistry
- The Minerva Center for Biohybrid Complex Systems
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
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37
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Yao H, Wang J, Mi S. Photo Processing for Biomedical Hydrogels Design and Functionality: A Review. Polymers (Basel) 2017; 10:E11. [PMID: 30966045 PMCID: PMC6415176 DOI: 10.3390/polym10010011] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/18/2017] [Accepted: 12/19/2017] [Indexed: 01/20/2023] Open
Abstract
A large number of opportunities for biomedical hydrogel design and functionality through photo-processing have stretched the limits of innovation. As both photochemical understanding and engineering technologies continue to develop, more complicated geometries and spatiotemporal manipulations can be realized through photo-exposure, producing multifunctional hydrogels with specific chemical, biological and physical characteristics for the achievement of biomedical goals. This report describes the role that light has recently played in the synthesis and functionalization of biomedical hydrogels and primarily the design of photoresponsive hydrogels via different chemical reactions (photo crosslinking and photo degradation) and conventional light curing processes (micropatterning, stereolithography and two/multiphoton techniques) as well as typical biomedical applications of the hydrogels (cell culture, differentiation and in vivo vascularization) and their promising future.
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Affiliation(s)
- Hongyi Yao
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Jieqiong Wang
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
| | - Shengli Mi
- Biomanufacturing Engineering Laboratory, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
- Open FIESTA Center, Tsinghua University, Shenzhen 518055, China.
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38
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Bajgrowicz-Cieslak M, Alqurashi Y, Elshereif MI, Yetisen AK, Hassan MU, Butt H. Optical glucose sensors based on hexagonally-packed 2.5-dimensional photonic concavities imprinted in phenylboronic acid functionalized hydrogel films. RSC Adv 2017; 7:53916-53924. [PMID: 29308195 PMCID: PMC5708336 DOI: 10.1039/c7ra11184c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 11/16/2017] [Indexed: 11/21/2022] Open
Abstract
Continuous glucose monitoring aims to achieve accurate control of blood glucose concentration to prevent hypo/hyperglycaemia in diabetic patients. Hydrogel-based systems have emerged as a reusable sensing platform to quantify biomarkers in high-risk patients at clinical and point-of-care settings. The capability to integrate hydrogel-based systems with optical transducers will provide quantitative and colorimetric measurements via spectrophotometric analyses of biomarkers. Here, we created an imprinting method to rapidly produce 2.5D photonic concavities in phenylboronic acid functionalized hydrogel films. Our method exploited diffraction properties of hexagonally-packed 2.5D photonic microscale concavities having a lattice spacing of 3.3 μm. Illumination of the 2.5D hexagonally-packed structure with a monochromatic light source in transmission mode allowed reversible and quantitative measurements of variation in the glucose concentration based on first order lattice interspace tracking. Reversible covalent phenylboronic acid coupling with cis-diols of glucose molecules expanded the hydrogel matrix by ∼2% and 34% in the presence of glucose concentrations of 1 mM and 200 mM, respectively. A Donnan osmotic pressure induced volumetric expansion of the hydrogel matrix due to increasing glucose concentrations (1-200 mM), resulted in a nanoscale modulation of the lattice interspace, and shifted the diffraction angle (∼45° to 36°) as well as the interspacing between the 1st order diffraction spots (∼8 to 3 mm). The sensor exhibited a maximum lattice spacing diffraction shift within a response time of 15 min in a reversible manner. The developed 2.5D photonic sensors may have application in medical point-of-care diagnostics, implantable chips, and wearable continuous glucose monitoring devices.
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Affiliation(s)
| | - Yousef Alqurashi
- School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; Tel: +44 (0)121 4158623
| | - Mohamed Ismail Elshereif
- School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; Tel: +44 (0)121 4158623
| | - Ali K Yetisen
- School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; Tel: +44 (0)121 4158623
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Landsdowne Street, Cambridge, MA 02139, USA
| | - Muhammad Umair Hassan
- School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; Tel: +44 (0)121 4158623
- Centre for Micro and Nano Devices, COMSATS Institute of Information Technology, Park Road, Islamabad, 44000, Pakistan
| | - Haider Butt
- School of Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; Tel: +44 (0)121 4158623
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39
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Sing MK, Ramírez J, Olsen BD. Mechanical response of transient telechelic networks with many-part stickers. J Chem Phys 2017; 147:194902. [PMID: 29166120 DOI: 10.1063/1.4993649] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
A central question in soft matter is understanding how several individual, weak bonds act together to produce collective interactions. Here, gel-forming telechelic polymers with multiple stickers at each chain end are studied through Brownian dynamics simulations to understand how collective interaction of the bonds affects mechanical response of the gels. These polymers are modeled as finitely extensible dumbbells using an explicit tau-leap algorithm and the binding energy of these associations was kept constant regardless of the number of stickers. The addition of multiple bonds to the associating ends of telechelic polymers increases or decreases the network relaxation time depending on the relative kinetics of association but increases both shear stress and extensional viscosity. The relationship between the rate of association and the Rouse time of dangling chains results in two different regimes for the equilibrium stress relaxation of associating physical networks. In case I, a dissociated dangling chain is able to fully relax before re-associating to the network, resulting in two characteristic relaxation times and a non-monotonic terminal relaxation time with increasing number of bonds per polymer endgroup. In case II, the dissociated dangling chain is only able to relax a fraction of the way before it re-attaches to the network, and increasing the number of bonds per endgroup monotonically increases the terminal relaxation time. In flow, increasing the number of stickers increases the steady-state shear and extensional viscosities even though the overall bond kinetics and equilibrium constant remain unchanged. Increased dissipation in the simulations is primarily due to higher average chain extension with increasing bond number. These results indicate that toughness and dissipation in physically associating networks can both be increased by breaking single, strong bonds into smaller components.
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Affiliation(s)
- Michelle K Sing
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Jorge Ramírez
- Departamento de Ingeniería Química Industrial Y Medio Ambiente, Universidad Politécnica de Madrid, Madrid 28006, Spain
| | - Bradley D Olsen
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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40
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Goswami SK, McAdam CJ, Hanton LR, Moratti SC. Hyperelastic Tough Gels through Macrocross-Linking. Macromol Rapid Commun 2017; 38. [PMID: 28489301 DOI: 10.1002/marc.201700103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/04/2017] [Indexed: 01/12/2023]
Abstract
The wet and soft nature of hydrogels makes them useful as a mimic for biological tissues, and in uses such as actuators and drug delivery vehicles. For many applications the mechanical performance of the gel is critical, but gels are notoriously weak and prone to fracture. Free radical polymerization is a very powerful technique allowing for fine spatial and temporal control of polymerization, but also allows for the use of a wide range of monomers and mixtures. In this work, it is demonstrated that extremely tough and extensible hydrogels can be readily produced through simple radical polymerization of acrylamide or acrylic acid with a poly(ethylene oxide) macrocross-linker. These gels, with a water content of 85%, are extremely elastic with an extension much more than 15 000% at 9 MPa true stress. They can be compressed over 98% at a stress of 17 MPa. They are notch-insensitive, and the usual trouser tear test does not work because the tear simply does not propagate. This highly extensible nature seems to be related to very long chain lengths between cross-links and efficient incorporation of chains into the network.
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Affiliation(s)
- Shailesh K Goswami
- Department of Chemistry, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | | | - Lyall R Hanton
- Department of Chemistry, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - Stephen C Moratti
- Department of Chemistry, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
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41
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Yang C, Liu Z, Chen C, Shi K, Zhang L, Ju XJ, Wang W, Xie R, Chu LY. Reduced Graphene Oxide-Containing Smart Hydrogels with Excellent Electro-Response and Mechanical Properties for Soft Actuators. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15758-15767. [PMID: 28425695 DOI: 10.1021/acsami.7b01710] [Citation(s) in RCA: 122] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel reduced graphene oxide/poly(2-acrylamido-2-methylpropanesulfonic acid-co-acrylamide) (rGO/poly(AMPS-co-AAm)) nanocomposite hydrogel that possesses excellent electro-response and mechanical properties has been successfully developed. The rGO nanosheets that homogeneously dispersed in the hydrogels could provide prominent conductive platforms for promoting the ion transport inside the hydrogels to generate significant osmotic pressure between the outside and inside of such nanocomposite hydrogels. Thus, the electro-responsive rate and degree of the hydrogel for both deswelling and bending performances become rapid and remarkable. Moreover, the enhanced mechanical properties including both the tensile strength and compressive strength of rGO/poly(AMPS-co-AAm) hydrogels are improved by the hydrogen-bond interactions between the rGO nanosheets and polymer chains, which could dissipate the strain energy in the polymeric networks of the hydrogels. The proposed rGO/poly(AMPS-co-AAm) nanocomposite hydrogels with improved mechanical properties exhibit rapid, significant, and reversible electro-response, which show great potential for developing remotely controlled electro-responsive hydrogel systems, such as smart actuators and soft manipulators.
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Affiliation(s)
- Chao Yang
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Zhuang Liu
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Chen Chen
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Kun Shi
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Lei Zhang
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Xiao-Jie Ju
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Wei Wang
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Rui Xie
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing, Jiangsu 211816, P. R. China
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42
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Luo R, Dinh ND, Chen CH. Fast-responsive hydrogel as an injectable pump for rapid on-demand fluidic flow control. BIOMICROFLUIDICS 2017; 11:034107. [PMID: 28798856 PMCID: PMC5533479 DOI: 10.1063/1.4983493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 05/02/2017] [Indexed: 05/02/2023]
Abstract
Chemically synthesized functional hydrogels have been recognized as optimized soft pumps for on-demand fluidic regulation in micro-systems. However, the challenges regarding the slow responses of hydrogels have very much limited their application in effective fluidic flow control. In this study, a heterobifunctional crosslinker (4-hydroxybutyl acrylate)-enabled two-step hydrothermal phase separation process for preparing a highly porous hydrogel with fast response dynamics was investigated for the fabrication of novel microfluidic functional units, such as injectable valves and pumps. The cylinder-shaped hydrogel, with a diameter of 9 cm and a height of 2.5 cm at 25 °C, achieved a size reduction of approximately 70% in less than 30 s after the hydrogels were heated at 40 °C. By incorporating polypyrrole nanoparticles as photothermal transducers, a photo-responsive composite hydrogel was approached and exhibited a remotely triggerable fluidic regulation and pumping ability to generate significant flows, showing on-demand water-in-oil droplet generation by laser switching, whereby the droplet size could be tuned by adjusting the laser intensity and irradiation period with programmable manipulation.
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Affiliation(s)
- Rongcong Luo
- Department of Biomedical Engineering, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077
| | - Ngoc-Duy Dinh
- Department of Biomedical Engineering, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077
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43
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Rombouts WH, Domeradzka NE, Werten MWT, Leermakers FAM, de Vries RJ, de Wolf FA, van der Gucht J. Enhanced stiffness of silk-like fibers by loop formation in the corona leads to stronger gels. Biopolymers 2017; 105:795-801. [PMID: 27400673 DOI: 10.1002/bip.22909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/03/2016] [Accepted: 07/06/2016] [Indexed: 11/07/2022]
Abstract
We study the self-assembly of protein polymers consisting of a silk-like block flanked by two hydrophilic blocks, with a cysteine residue attached to the C-terminal end. The silk blocks self-assemble to form fibers while the hydrophilic blocks form a stabilizing corona. Entanglement of the fibers leads to the formation of hydrogels. Under oxidizing conditions the cysteine residues form disulfide bridges, effectively connecting two corona chains at their ends to form a loop. We find that this leads to a significant increase in the elastic modulus of the gels. Using atomic force microscopy, we show that this stiffening is due to an increase of the persistence length of the fibers. Self-consistent-field calculations indicate a slight decrease of the lateral pressure in the corona upon loop formation. We argue that this small decrease in the repulsive interactions affects the stacking of the silk-like blocks in the core, resulting in a more rigid fiber.
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Affiliation(s)
- Wolf H Rombouts
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, Wageningen, NL-6708 WE, The Netherlands
| | - Natalia E Domeradzka
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, Wageningen, NL-6708 WE, The Netherlands.,Wageningen UR Food & Biobased Research, Bornse Weilanden 9, Wageningen, NL-6708 WG, The Netherlands
| | - Marc W T Werten
- Wageningen UR Food & Biobased Research, Bornse Weilanden 9, Wageningen, NL-6708 WG, The Netherlands
| | - Frans A M Leermakers
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, Wageningen, NL-6708 WE, The Netherlands
| | - Renko J de Vries
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, Wageningen, NL-6708 WE, The Netherlands
| | - Frits A de Wolf
- Wageningen UR Food & Biobased Research, Bornse Weilanden 9, Wageningen, NL-6708 WG, The Netherlands
| | - Jasper van der Gucht
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, Wageningen, NL-6708 WE, The Netherlands
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44
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Pastorczak M, Okrasa L, Yoon JA, Kowalewski T, Matyjaszewski K. Kinetics of the temperature-induced volume phase transition in poly(2-(2-methoxyethoxy)ethyl methacrylate) hydrogels of various topologies. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.12.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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45
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Chen Z, Lv Z, Qing G, Sun T. Exploring the role of molecular chirality in the photo-responsiveness of dipeptide-based gels. J Mater Chem B 2017; 5:3163-3171. [DOI: 10.1039/c7tb00402h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Chiral effect: upon UV light irradiation, the l-gel has a markedly faster gel–sol transition than the d-gel.
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Affiliation(s)
- Zhonghui Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Ziyu Lv
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Guangyan Qing
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Taolei Sun
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
- School of Chemistry
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46
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Yasumoto A, Gotoh H, Gotoh Y, Imran AB, Hara M, Seki T, Sakai Y, Ito K, Takeoka Y. Highly Responsive Hydrogel Prepared Using Poly(N-isopropylacrylamide)-Grafted Polyrotaxane as a Building Block Designed by Reversible Deactivation Radical Polymerization and Click Chemistry. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01955] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Atsushi Yasumoto
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Hiroaki Gotoh
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Yoshie Gotoh
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Abu Bin Imran
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Mitsuo Hara
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Takahiro Seki
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Yasuhiro Sakai
- Department of Advanced Materials Science,
Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Kohzo Ito
- Department of Advanced Materials Science,
Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Yukikazu Takeoka
- Department of Molecular
Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
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47
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Surface Morphology at the Microscopic Scale, Swelling/Deswelling, and the Magnetic Properties of PNIPAM/CMC and PNIPAM/CMC/Fe₃O₄ Hydrogels. Gels 2016; 2:gels2040030. [PMID: 30674160 PMCID: PMC6318666 DOI: 10.3390/gels2040030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/29/2016] [Accepted: 12/05/2016] [Indexed: 11/25/2022] Open
Abstract
Poly(N-isopropylacrylamide) (PNIPAM) hydrogels containing carboxymethylcellulose (CMC) and CMC/Fe3O4 nanoparticles were prepared. Free-radical polymerization with BIS as cross-linker was used to synthesize the hydrogels. The morphology at the microscopic scale of these materials was investigated using field emission scanning electron microscopy (FESEM). The images show that CMC in the PNIPAM hydrogels induces the formation of a honeycomb structure. This surface morphology was not observed for pure PNIPAM hydrogels prepared under similar conditions. The equilibrium swelling degree of the PNIPAM/CMC hydrogels (5200%) is much larger than that of the pure PNIPAM hydrogels (2500%). The water retention of PNIPAM/CMC hydrogels above the volume phase transition temperature is strongly reduced compared to that of pure PNIPAM hydrogel. Both PNIPAM/Fe3O4 and PNIPAM/CMC/Fe3O4 hydrogels exhibit a superparamagnetic behavior, but the blocking temperature (104 K) of the former is higher than that of the latter (83 K).
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48
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Ohmori K, Abu Bin I, Seki T, Liu C, Mayumi K, Ito K, Takeoka Y. Molecular weight dependency of polyrotaxane-cross-linked polymer gel extensibility. Chem Commun (Camb) 2016; 52:13757-13759. [PMID: 27797388 DOI: 10.1039/c6cc07641f] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work investigates the influence of the molecular weight of polyrotaxane (PR) cross-linkers on the extensibility of polymer gels. The polymer gels, which were prepared using PR cross-linkers of three different molecular weights but the same number of cross-linking points per unit volume of gel, have almost the same Young's modulus. By contrast, the extensibility and rupture strength of the polymer gels are substantially increased with increasing molecular weight of the PR cross-linker.
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Affiliation(s)
- Kana Ohmori
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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49
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Pathak SK, Gupta M, Pal SK, Achalkumar AS. Hexacatenars Exhibiting π-π Driven Supergelation, Aggregation Induced Blue Light Emission and Thermochromism. ChemistrySelect 2016. [DOI: 10.1002/slct.201600927] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Suraj K. Pathak
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039, Assam India
| | - Monika Gupta
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City; Manauli 140306, Punjab India
| | - Santanu K. Pal
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City; Manauli 140306, Punjab India
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Díaz-González M, Fernández-Sánchez C, Baldi A. Multiple actuation microvalves in wax microfluidics. LAB ON A CHIP 2016; 16:3969-3976. [PMID: 27714007 DOI: 10.1039/c6lc00800c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Microvalves are an essential component of microfluidic devices. In this work, a low-consumption (<35 mJ), fast-response (<0.3 s), small footprint (<0.5 mm2) wax microvalve capable of multiple actuation is described. This phase-change microvalve is electrically controlled, simple to operate and can be easily fabricated as a fully integrated element of wax microfluidic devices through a special decal-transfer microlithographic process. The valve is inherently latched and leak-proof to at least 100 kPa. A minimum pressure of 3 kPa is required for valve opening. Maximum pressures for a successful closing in air and liquid are 90 and 40 kPa, respectively. The wax valve exhibits reversible open-close behaviour without failure for up to 10 actuation cycles in air (60 kPa) and 5 in water (30 kPa). To the best of our knowledge, this microvalve has the lowest energy consumption (two orders of magnitude lower) reported so far for a plug-type phase-change valve. Furthermore, its size, actuation mechanism and fabrication technology make it suitable for large-scale integration in microfluidic devices. Detailed characteristics in fabrication and actuation of the wax microfluidic valve as well as a test example of its performance for liquid dispensing are reported.
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Affiliation(s)
- María Díaz-González
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Bellaterra, 08193, Spain.
| | - César Fernández-Sánchez
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Bellaterra, 08193, Spain.
| | - Antonio Baldi
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus UAB, Bellaterra, 08193, Spain.
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