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Fuchs S, Caserto JS, Liu Q, Wang K, Shariati K, Hartquist CM, Zhao X, Ma M. A Glucose-Responsive Cannula for Automated and Electronics-Free Insulin Delivery. Adv Mater 2024:e2403594. [PMID: 38639424 DOI: 10.1002/adma.202403594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/12/2024] [Indexed: 04/20/2024]
Abstract
Automated delivery of insulin based on continuous glucose monitoring is revolutionizing the way insulin-dependent diabetes is treated. However, challenges remain for the widespread adoption of these systems, including the requirement of a separate glucose sensor, sophisticated electronics and algorithms, and the need for significant user input to operate these costly therapies. Herein, a user-centric glucose-responsive cannula is reported for electronics-free insulin delivery. The cannula-made from a tough, elastomer-hydrogel hybrid membrane formed through a one-pot solvent exchange method-changes permeability to release insulin rapidly upon physiologically relevant varying glucose levels, providing simple and automated insulin delivery with no additional hardware or software. Two prototypes of the cannula are evaluated in insulin-deficient diabetic mice. The first cannula-an ends-sealed, subcutaneously inserted prototype-normalizes blood glucose levels for 3 d and controls postprandial glucose levels. The second, more translational version-a cannula with the distal end sealed and the proximal end connected to a transcutaneous injection port-likewise demonstrates tight, 3-d regulation of blood glucose levels when refilled twice daily. This proof-of-concept study may aid in the development of "smart" cannulas and next-generation insulin therapies at a reduced burden-of-care toll and cost to end-users.
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Affiliation(s)
- Stephanie Fuchs
- Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Julia S Caserto
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Qingsheng Liu
- Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Kecheng Wang
- Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Kaavian Shariati
- Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Chase M Hartquist
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Xuanhe Zhao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Minglin Ma
- Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA
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2
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Xu Y, Sun K, Huang L, Dai Y, Zhang X, Xia F. Magneto-Induced Janus Adhesive- Tough Hydrogels for Wearable Human Motion Sensing and Enhanced Low-Grade Heat Harvesting. ACS Appl Mater Interfaces 2024; 16:10556-10564. [PMID: 38359102 DOI: 10.1021/acsami.3c19373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Janus hydrogels with different properties on the two surfaces have considerable potential in the field of material engineering applications. Various Janus hydrogels have been developed, but there are still some problems, such as stress mismatch caused by the double-layer structure and Janus failure caused by material diffusion in the gradient structure. Here, we report a Janus adhesive-tough hydrogel with polydopamine-decorated Fe3O4 nanoparticles (Fe3O4@PDA) at one side induced by magnetic field to avoid uncontrollable material diffusion in the cross-linking polymerization of acrylamide with alginate-calcium. The magneto-induced Janus (MIJ) hydrogel has an adhesive surface and a tough bulk without an obvious interface to avoid stress mismatch. Due to the intrinsic dissipative matrix and the abundant catechol groups on the adhesive surface, it shows strong adhesion onto various substrates. The MIJ hydrogel has high sensitivity (GF = 0.842) in detecting tiny human motion. Owing to the synergy of Fe3O4@PDA-enhanced interfacial adhesion and heat transfer, it is possible to quickly generate effective temperature differences when adhering to human skin. The MIJ hydrogel achieves a Seebeck coefficient of 13.01 mV·K-1 and an output power of 462.02 mW·m-2 at a 20 K temperature difference. This work proposes a novel strategy to construct Janus hydrogels for flexible wearable devices in human motion sensing and low-grade heat harvesting.
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Affiliation(s)
- Yindong Xu
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Keyong Sun
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Lingyi Huang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Yu Dai
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Xiaojin Zhang
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, China
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
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3
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Wan H, Wu B, Hou L, Wu P. Amphibious Polymer Materials with High Strength and Superb Toughness in Various Aquatic and Atmospheric Environments. Adv Mater 2024; 36:e2307290. [PMID: 37683287 DOI: 10.1002/adma.202307290] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 09/06/2023] [Indexed: 09/10/2023]
Abstract
Herein, the fabrication of amphibious polymer materials with outstanding mechanical performances, both underwater and in the air is reported. A polyvinyl alcohol/poly(2-methoxyethylacrylate) (PVA/PMEA) composite with multiscale nanostructures is prepared by combining solvent exchange and thermal annealing strategies, which contributes to nanophase separation with rigid PVA-rich and soft PMEA-rich phases and high-density crystalline domains of PVA chains, respectively. Benefiting from the multiscale nanostructure, the PVA/PMEA hydrogel demonstrates excellent stability in harsh (such as acidic, alkaline, and saline) aqueous solutions, as well as superior mechanical behavior with a breaking strength of up to 34.8 MPa and toughness of up to 214.2 MJ m-3 . Dehydrating the PVA/PMEA hydrogel results in an extremely robust plastic with a breaking strength of 65.4 MPa and toughness of 430.9 MJ m-3 . This study provides a promising phase-structure engineering route for constructing high-performance polymer materials for complex load-bearing environments.
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Affiliation(s)
- Hongbo Wan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
| | - Baohu Wu
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich, Lichtenbergstr. 1, 85748, Garching, Germany
| | - Lei Hou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
| | - Peiyi Wu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
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4
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Yuan X, Zhu Z, Xia P, Wang Z, Zhao X, Jiang X, Wang T, Gao Q, Xu J, Shan D, Guo B, Yao Q, He Y. Tough Gelatin Hydrogel for Tissue Engineering. Adv Sci (Weinh) 2023; 10:e2301665. [PMID: 37353916 PMCID: PMC10460895 DOI: 10.1002/advs.202301665] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/18/2023] [Indexed: 06/25/2023]
Abstract
Tough hydrogel has attracted considerable interest in various fields, however, due to poor biocompatibility, nondegradation, and pronounced compositional differences from natural tissues, it is difficult to be used for tissue regeneration. Here, a gelatin-based tough hydrogel (GBTH) is proposed to fill this gap. Inspired by human exercise to improve muscle strength, the synergistic effect is utilized to generate highly functional crystalline domains for resisting crack propagation. The GBTH exhibits excellent tensile strength of 6.67 MPa (145-fold that after untreated gelation). Furthermore, it is directly sutured to a ruptured tendon of adult rabbits due to its pronounced toughness and biocompatibility, self-degradability in vivo, and similarity to natural tissue components. Ruptured tendons can compensate for mechanotransduction by GBTH and stimulate tendon differentiation to quickly return to the initial state, that is, within eight weeks. This strategy provides a new avenue for preparation of highly biocompatible tough hydrogel for tissue regeneration.
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Affiliation(s)
- Ximin Yuan
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
- National Innovation Center for Advanced Medical DevicesShenzhen457001P. R. China
| | - Zhou Zhu
- State Key Laboratory of Oral DiseasesNational Clinical Research Center for Oral DiseasesWest China Hospital of StomatologyChengdu610041P. R. China
| | - Pengcheng Xia
- Institute of Digital MedicineNanjing First HospitalNanjing Medical UniversityNanjing210006P. R. China
| | - Zhenjia Wang
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
- National Innovation Center for Advanced Medical DevicesShenzhen457001P. R. China
| | - Xiao Zhao
- Institute of Digital MedicineNanjing First HospitalNanjing Medical UniversityNanjing210006P. R. China
| | - Xiao Jiang
- Institute of Digital MedicineNanjing First HospitalNanjing Medical UniversityNanjing210006P. R. China
| | - Tianming Wang
- Institute of Digital MedicineNanjing First HospitalNanjing Medical UniversityNanjing210006P. R. China
| | - Qing Gao
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Jie Xu
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
- National Innovation Center for Advanced Medical DevicesShenzhen457001P. R. China
| | - Debin Shan
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
- National Innovation Center for Advanced Medical DevicesShenzhen457001P. R. China
| | - Bin Guo
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
- National Innovation Center for Advanced Medical DevicesShenzhen457001P. R. China
| | - Qingqiang Yao
- Institute of Digital MedicineNanjing First HospitalNanjing Medical UniversityNanjing210006P. R. China
| | - Yong He
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhou310027P. R. China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceCollege of Mechanical EngineeringZhejiang UniversityHangzhou310027P. R. China
- Cancer CenterZhejiang UniversityHangzhou310058P. R. China
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5
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Wang B, Liu J, Zhang P, Wei H, Yu Y. Trifunctional Microgel-Mediated Preparation and Toughening of Printable High-Performance Chitosan Hydrogels for Underwater Communications. ACS Appl Mater Interfaces 2023; 15:10075-10083. [PMID: 36753682 DOI: 10.1021/acsami.3c00195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Natural and biocompatible chitosan has demonstrated wide applications. However, rapidly fabricating high-performance chitosan hydrogels in one-step controllable processes is still a challenge for some advanced applications. Here, we report a trifunctional microgel-mediated photochemical (TMMP) strategy to achieve the fabrication of printable tough chitosan-based hydrogels (PTCHs) in seconds. Such microgels help the slow release of persulfate anions and their uniform dispersion in an aqueous solution of cationic chitosan. The released persulfates are available for preparing multiple networks of phenolic coupling of modified chitosan and radical polymerization of Pluronic F127 via orthogonal tris(bipyridine)ruthenium(II)-based photochemistry, respectively. Trifunctional microgels have reversible Ca2+-crosslinked networks that further improve the hydrogels' mechanical properties and toughness. The maximum stress and toughness increase by >20 folds compared to the chitosan and F127 hydrogels with single network structures. Moreover, these microgels enable the precursor to have a good shearing-thinning property and benefit the controllable preparation of PTCHs in a short time, as low as ∼4 s under visible light irradiation. It, therefore, is compatible with standard printing techniques to make complex structures. Strain sensors based on structured PTCHs have stable mechanical and responsive properties in the water, which are applied for real-time underwater communications (<0.4 s). It is anticipated that this one-step TMMP strategy opens new horizons for designing advanced chitosan hydrogels.
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Affiliation(s)
- Baokang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
| | - Jupen Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
| | - Ping Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
| | - Hongqiu Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
| | - You Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
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Ji D, Im P, Shin S, Kim J. Specimen Geometry Effect on Experimental Tensile Mechanical Properties of Tough Hydrogels. Materials (Basel) 2023; 16:785. [PMID: 36676522 PMCID: PMC9866837 DOI: 10.3390/ma16020785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/29/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Synthetic tough hydrogels have received attention because they could mimic the mechanical properties of natural hydrogels, such as muscle, ligament, tendon, and cartilage. Many recent studies suggest various approaches to enhance the mechanical properties of tough hydrogels. However, directly comparing each hydrogel property in different reports is challenging because various testing specimen shapes/sizes were employed, affecting the experimental mechanical property values. This study demonstrates how the specimen geometry-the lengths and width of the reduced section-of a tough double-network hydrogel causes differences in experimental tensile mechanical values. In particular, the elastic modulus was systemically compared using eleven specimens of different shapes and sizes that were tensile tested, including a rectangle, ASTM D412-C and D412-D, JIS K6251-7, and seven customized dumbbell shapes with various lengths and widths of the reduced section. Unlike the rectangular specimen, which showed an inconsistent measurement of mechanical properties due to a local load concentration near the grip, dumbbell-shaped specimens exhibited a stable fracture at the reduced section. The dumbbell-shaped specimen with a shorter gauge length resulted in a smaller elastic modulus. Moreover, a relationship between the specimen dimension and measured elastic modulus value was derived, which allowed for the prediction of the experimental elastic modulus of dumbbell-shaped tough hydrogels with different dimensions. This study conveys a message that reminds the apparent experimental dependence of specimen geometry on the stress-strain measurement and the need to standardize the measurement of of numerous tough hydrogels for a fair comparison.
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Affiliation(s)
- Donghwan Ji
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Pilseon Im
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Sunmi Shin
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore
| | - Jaeyun Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Institute of Quantum Biophysics (IQB), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
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7
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Park K, Kang K, Kim J, Kim SD, Jin S, Shin M, Son D. Balanced Coexistence of Reversible and Irreversible Covalent Bonds in a Conductive Triple Polymeric Network Enables Stretchable Hydrogels with High Toughness and Adhesiveness. ACS Appl Mater Interfaces 2022; 14:56395-56406. [PMID: 36484343 DOI: 10.1021/acsami.2c17676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The application of soft hydrogels to stretchable devices has attracted increasing attention in deformable bioelectronics owing to their unique characteristic, "modulus matching between materials and organs". Despite considerable progress, their low toughness, low conductivity, and absence of tissue adhesiveness remain substantial challenges associated with unstable skin-interfacing, where body movements undesirably disturb electrical signal acquisitions. Herein, we report a material design of a highly tough strain-dissipative and skin-adhesive conducting hydrogel fabricated through a facile one-step sol-gel transition and its application to an interactive human-machine interface. The hydrogel comprises a triple polymeric network where irreversible amide linkage of polyacrylamide with alginate and dynamic covalent bonds entailing conjugated polymer chains of poly(3,4-ethylenedioxythiophene)-co-(3-thienylboronic acid) are simultaneously capable of high stretchability (1300% strain), efficient strain dissipation (36,209 J/m2), low electrical resistance (590 Ω), and even robust skin adhesiveness (35.0 ± 5.6 kPa). Based on such decent characteristics, the hydrogel was utilized as a multifunctional layer for successfully performing either electrophysiological cardiac/muscular on-skin sensors or an interactive stretchable human-machine interface.
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Affiliation(s)
- Kyuha Park
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
| | - Kyumin Kang
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
| | - Jungwoo Kim
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Sung Dong Kim
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Institute for Convergence, Suwon16419, Republic of Korea
| | - Subin Jin
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
| | - Mikyung Shin
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Institute for Convergence, Suwon16419, Republic of Korea
| | - Donghee Son
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon16419, Republic of Korea
- Department of Superintelligence Engineering, Sungkyunkwan University (SKKU), Suwon16419, Republic of Korea
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8
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Liu J, Zhang B, Zhang P, Zhao K, Lu Z, Wei H, Zheng Z, Yang R, Yu Y. Protein Crystallization-Mediated Self-Strengthening of High-Performance Printable Conducting Organohydrogels. ACS Nano 2022; 16:17998-18008. [PMID: 36136126 DOI: 10.1021/acsnano.2c07823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Conductive polymers have many advanced applications, but there is still an important target in developing a general and straightforward strategy for printable, mechanically stable, and durable organohydrogels with typical conducting polymers of, for example, polypyrrole, polyaniline, or poly(3,4-ethylenedioxythiophene). Here we report a protein crystallization-mediated self-strengthening strategy to fabricate printable conducting organohydrogels with the combination of rational photochemistry design. Such organohydrogels are one-step prepared via rapidly and orthogonally controllable photopolymerizations of pyrroles and gelatin protein in tens of seconds. As-prepared conducting organohydrogels are patterned and printed to complicated structures via shadow-mask lithography and 3D extrusion technology. The mild photocatalytic system gives the transition metal carbide/nitride (MXene) component high stability during the oxidative preparation process and storage. Controlling water evaporation promotes gelatin crystallization in the as-prepared organohydrogels that significantly self-strengthens their mechanical property and stability in a broad temperature range and durability against continuous friction treatment without introducing guest functional materials. Also, these organohydrogels have commercially electromagnetic shielding, thermal conducting properties, and temperature- and light-responsibility. To further demonstrate the merits of this simple strategy and as-prepared organohydrogels, prism arrays, as proofs-of-concept, are printed and applied to make wearable triboelectric nanogenerators. This self-strengthening process and 3D-printability can greatly improve their voltage, charge, and current output performances compared to the undried and flat samples.
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Affiliation(s)
- Jupen Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Bo Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Ping Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Keqi Zhao
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710000, China
| | - Zhe Lu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Hongqiu Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Zijian Zheng
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, HongKong SAR, 999077, China
| | - Rusen Yang
- School of Advanced Materials and Nanotechnology, Xidian University, Xi'an 710000, China
| | - You Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
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Han Z, Chen S, Deng L, Liang Q, Qu X, Li J, Wang B, Wang H. Anti-Fouling, Adhesive Polyzwitterionic Hydrogel Electrodes Toughened Using a Tannic Acid Nanoflower. ACS Appl Mater Interfaces 2022; 14:45954-45965. [PMID: 36181479 DOI: 10.1021/acsami.2c14614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Conductive polyzwitterionic hydrogels with good adhesion properties show potential prospect in implantable electrodes and electronic devices. Adhesive property of polyzwitterionic hydrogels in humid environments can be improved by the introduction of catechol groups. However, common catechol modifiers can usually quench free radicals, resulting in a contradiction between long-term tissue adhesion and hydrogel toughness. By adding tannic acid (TA) to the dispersion of clay nanosheets and nanofibers, we designed TA-coated nanoflowers and nanofibers as the reinforcing phase to prepare polyzwitterionic hydrogels with adhesion properties. The hydrogel combines the mussel-like and zwitterionic co-adhesive mechanism to maintain long-term adhesion in underwater environments. In particular, the noncovalent cross-linking provided by the nanoflower structure effectively compensates for the defects caused by free-radical quenching so that the hydrogel obtained a high stretchability of over 2900% and a toughness of 1.16 J/m3. The hydrogel also has excellent anti-biofouling property and shows resistance to bacteria and cells. In addition, the hydrogel possesses a low modulus (<10 kPa) and ionic conductivity (0.25 S/m), making it an ideal material for the preparation of implantable electrodes.
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Affiliation(s)
- Zhiliang Han
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Shiyan Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Lili Deng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Qianqian Liang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Xiangyang Qu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Jing Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Baoxiu Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Huaping Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
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Yan L, Zhou T, Ni R, Jia Z, Jiang Y, Guo T, Wang K, Chen X, Han L, Lu X. Adhesive Gelatin-Catechol Complex Reinforced Poly(Acrylic Acid) Hydrogel with Enhanced Toughness and Cell Affinity for Cartilage Regeneration. ACS Appl Bio Mater 2022; 5:4366-4377. [PMID: 36044775 DOI: 10.1021/acsabm.2c00533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The repair of cartilage damage caused by trauma, wear, or degenerative deformation remains a major challenge in modern medicine. Therefore, it is essential to develop a mechanically compatible and bioactive scaffold for cartilage tissue regeneration. In this study, a mussel-inspired, tough, adhesive polydopamine/gelatin-poly(acrylic acid) (PDA/Gel-PAA) composite hydrogel was developed for cartilage regeneration. The hydrogel achieved a high compressive strength of up to 0.67 MPa and a toughness of 420 J/m2 because of the unique chemical-physical cross-linking structure by introducing the PDA/Gel complex into the PAA network. PAA chains with rich carboxyl groups mimic the negatively charged glycosaminoglycans (GAGs) in the natural cartilage extracellular matrix (ECM), leading to strong water retention in the hydrogel. The incorporation of the PDA/Gel complex with catechol groups on PDA and arginine-glycine-aspartic acid (RGD) sequences on gelatin chains provided abundant adhesive motifs to improve the cell affinity and tissue adhesiveness of PAA, thereby facilitating the adhesion and proliferation of bone marrow stromal cells (BMSCs). In addition, transforming growth factor-β3 (TGFβ3) was stably immobilized and released from the PDA/Gel-PAA hydrogel. Thus, adhesive hydrogels can provide a suitable microenvironment to promote cell migration in the defect area and induce chronogenesis for cartilage regeneration.
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Affiliation(s)
- Liwei Yan
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Ting Zhou
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Ruicheng Ni
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Zhanrong Jia
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Yanan Jiang
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Tailin Guo
- College of Medicine, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, China
| | - Xian Chen
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China
| | - Lu Han
- School of Medicine and Pharmaceutics, Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Ocean University of China, Qingdao 266003, Shandong, China
| | - Xiong Lu
- School of Materials Science and Engineering, Key Lab of Advanced Technologies of Materials, Ministry of Education, Yibin Institute of Southwest Jiaotong University, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
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11
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Wei H, Zhang B, Lei M, Lu Z, Liu J, Guo B, Yu Y. Visible-Light-Mediated Nano-biomineralization of Customizable Tough Hydrogels for Biomimetic Tissue Engineering. ACS Nano 2022; 16:4734-4745. [PMID: 35225602 DOI: 10.1021/acsnano.1c11589] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Biomineralized tough hydrogels (BTHs) have advanced applications in the fields of soft bioelectronics and biomimetic tissue engineering. But the development of rapid and general photomineralization strategies for one-step fabrication of customizable BTHs is still a challenging task. Here we report a straightforward, low-cost visible-light-mediated nano-biomineralization (VLMNB) strategy via a rational design of a phosphate source and efficient ruthenium photochemistry. Multinetwork tough hydrogels are simultaneously constructed under the same condition. Therefore, BTHs are rapidly prepared in a short time as low as ∼60 s under visible light irradiation. The in situ formation of calcium phosphate particles can improve BTHs' mechanical and biological properties and reduce the friction coefficient with bones. Furthermore, fast biomineralization and solidification processes in these BTHs benefit their injectable and highly flexible customizable design, showing applications of promoting customizable skin repair and bone regeneration.
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Affiliation(s)
- Hongqiu Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, China, 710127
| | - Bo Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China, 610064
| | - Ming Lei
- School of Astronautics, Northwestern Polytechnical University, Xi'an, China, 710072
| | - Zhe Lu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, China, 710127
| | - Jupen Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, China, 710127
| | - Baolin Guo
- Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China, 710049
| | - You Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, China, 710127
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China, 730000
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12
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Xin H, Naficy S. Drug Delivery Based on Stimuli-Responsive Injectable Hydrogels for Breast Cancer Therapy: A Review. Gels 2022; 8:gels8010045. [PMID: 35049580 PMCID: PMC8774468 DOI: 10.3390/gels8010045] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/23/2021] [Accepted: 01/01/2022] [Indexed: 01/01/2023] Open
Abstract
Breast cancer is the most common and biggest health threat for women. There is an urgent need to develop novel breast cancer therapies to overcome the shortcomings of conventional surgery and chemotherapy, which include poor drug efficiency, damage to normal tissues, and increased side effects. Drug delivery systems based on injectable hydrogels have recently gained remarkable attention, as they offer encouraging solutions for localized, targeted, and controlled drug release to the tumor site. Such systems have great potential for improving drug efficiency and reducing the side effects caused by long-term exposure to chemotherapy. The present review aims to provide a critical analysis of the latest developments in the application of drug delivery systems using stimuli-responsive injectable hydrogels for breast cancer treatment. The focus is on discussing how such hydrogel systems enhance treatment efficacy and incorporate multiple breast cancer therapies into one system, in response to multiple stimuli, including temperature, pH, photo-, magnetic field, and glutathione. The present work also features a brief outline of the recent progress in the use of tough hydrogels. As the breast undergoes significant physical stress and movement during sporting and daily activities, it is important for drug delivery hydrogels to have sufficient mechanical toughness to maintain structural integrity for a desired period of time.
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Affiliation(s)
- Hai Xin
- Independent Researcher, Hornsby, NSW 2077, Australia
- Correspondence:
| | - Sina Naficy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia;
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13
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Debertrand L, Zhao J, Creton C, Narita T. Swelling and Mechanical Properties of Polyacrylamide-Derivative Dual-Crosslink Hydrogels Having Metal-Ligand Coordination Bonds as Transient Crosslinks. Gels 2021; 7:72. [PMID: 34203901 PMCID: PMC8293112 DOI: 10.3390/gels7020072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/08/2021] [Accepted: 06/08/2021] [Indexed: 12/28/2022] Open
Abstract
Hydrogels that have both permanent chemical crosslinks and transient physical crosslinks are good model systems to represent tough gels. Such "dual-crosslink" hydrogels can be prepared either by simultaneous polymerization and dual crosslinking (one-pot synthesis) or by diffusion/complexation of the physical crosslinks to the chemical network (diffusion method). To study the effects of the preparation methods and of the crosslinking ratio on the mechanical properties, the equilibrium swelling of the dual-crosslink gels need to be examined. Since most of these gels are polyelectrolytes, their swelling properties are complex, so no systematic study has been reported. In this work, we synthesized model dual-crosslink gels with metal-ligand coordination bonds as physical crosslinks by both methods, and we proposed a simple way of adding salt to control the swelling ratio prepared by ion diffusion. Tensile and linear rheological tests of the gels at the same swelling ratio showed that during the one-pot synthesis, free radical polymerization was affected by the transition metal ions used as physical crosslinkers, while the presence of electrostatic interactions did not affect the role of the metal complexes on the mechanical properties.
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Affiliation(s)
- Louis Debertrand
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France; (L.D.); (J.Z.)
| | - Jingwen Zhao
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France; (L.D.); (J.Z.)
| | - Costantino Creton
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France; (L.D.); (J.Z.)
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 001-0021, Japan
| | - Tetsuharu Narita
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France; (L.D.); (J.Z.)
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 001-0021, Japan
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14
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Ye YN, Cui K, Hong W, Li X, Yu C, Hourdet D, Nakajima T, Kurokawa T, Gong JP. Molecular mechanism of abnormally large nonsoftening deformation in a tough hydrogel. Proc Natl Acad Sci U S A 2021; 118:e2014694118. [PMID: 33782118 PMCID: PMC8040646 DOI: 10.1073/pnas.2014694118] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Tough soft materials usually show strain softening and inelastic deformation. Here, we study the molecular mechanism of abnormally large nonsoftening, quasi-linear but inelastic deformation in tough hydrogels made of hyperconnective physical network and linear polymers as molecular glues to the network. The interplay of hyperconnectivity of network and effective load transfer by molecular glues prevents stress concentration, which is revealed by an affine deformation of the network to the bulk deformation up to sample failure. The suppression of local stress concentration and strain amplification plays a key role in avoiding necking or strain softening and endows the gels with a unique large nonsoftening, quasi-linear but inelastic deformation.
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Affiliation(s)
- Ya Nan Ye
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
| | - Kunpeng Cui
- Institute for Chemical Reaction Design and Discovery, Hokkaido University, 001-0021 Sapporo, Japan;
| | - Wei Hong
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China
| | - Xueyu Li
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
| | - Chengtao Yu
- Graduate School of Life Science, Hokkaido University, 001-0021 Sapporo, Japan
| | - Dominique Hourdet
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
- Soft Matter Science and Engineering, The City of Paris Industrial Physics and Chemistry Higher Educational Institution (ESPCI Paris), Paris Sciences et Lettres University (PSL), Sorbonne University, CNRS, 75005 Paris, France
| | - Tasuku Nakajima
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
- Institute for Chemical Reaction Design and Discovery, Hokkaido University, 001-0021 Sapporo, Japan
- Faculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, Japan
| | - Takayuki Kurokawa
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan
- Faculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, Japan
| | - Jian Ping Gong
- Global Institution for Collaborative Research and Education, Hokkaido University, 001-0021 Sapporo, Japan;
- Institute for Chemical Reaction Design and Discovery, Hokkaido University, 001-0021 Sapporo, Japan
- Faculty of Advanced Life Science, Hokkaido University, 001-0021 Sapporo, Japan
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15
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Abstract
Hydrogels with attractive stimuli-responsive volume changing abilities are seeing emerging applications as soft actuators and robots. However, many hydrogels are intrinsically soft and fragile for tolerating mechanical damage in real world applications and could not deliver high actuation force because of the mechanical weakness of the porous polymer network. Conventional tough hydrogels, fabricated by forming double networks, dual cross-linking, and compositing, could not satisfy both high toughness and high stimuli responsiveness. Herein, we present a material design of combining responsive and tough components in a single hydrogel network, which enables the synergistic realization of high toughness and actuation performance. We showcased this material design in an exemplary tough and thermally responsive hydrogel based on PVA/(PVA-MA)-g-PNIPAM, which achieved 100 times higher toughness (∼10 MJ/m3) and 20 times higher actuation stress (∼10 kPa) compared to conventional PNIPAM hydrogels, and a contraction ratio of up to 50% simultaneously. The effects of salt concentration, polymer ratio, and structural design on the mechanical and actuation properties have been systematically investigated. Utilizing 4D printing, actuators of various geometries were fabricated, as well as lattice-architected hydrogels with macro-voids, presenting 4 times faster actuation speed compared to bulk hydrogel, in addition to the high toughness, actuation force, and contraction ratio.
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Affiliation(s)
- Mutian Hua
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
| | - Dong Wu
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
| | - Shuwang Wu
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
| | - Yanfei Ma
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yousif Alsaid
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
| | - Ximin He
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, California 90095 United States
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16
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Cui N, Han K, Zhou C, Seong M, Lu T, Jeong HE. A Tough Polysaccharide-Based Hydrogel with an On-Demand Dissolution Feature for Chronic Wound Care through Light-Induced Ultrafast Degradation. ACS Appl Bio Mater 2020; 3:8338-8343. [PMID: 35019606 DOI: 10.1021/acsabm.0c00554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Repeatedly changing dressings during wound healing can cause unbearable physical pain for patients with chronic skin injury. In this study, we designed a tough hydrogel-based dressing that can be degraded in an on-demand fashion for advanced chronic wound care. The resultant hydrogel dressing could be rapidly dissolved within 100 s after wetting with lithium phenyl(2,4,6-trimethylbenzonyl)phosphinate solution under low-power (1 W) ultraviolet (UV) irradiation (365 nm) owing to the breakage of disulfide bonds. This UV-triggered on-demand dissolution of tough hydrogels allows for a facile dressing replacement without causing tissue damage or pain, which is of great potential for clinical utilization.
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Affiliation(s)
- Ning Cui
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Kai Han
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Chuqing Zhou
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Minho Seong
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Tingli Lu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Hoon Eui Jeong
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
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17
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Zha XJ, Zhang ST, Pu JH, Zhao X, Ke K, Bao RY, Bai L, Liu ZY, Yang MB, Yang W. Nanofibrillar Poly(vinyl alcohol) Ionic Organohydrogels for Smart Contact Lens and Human-Interactive Sensing. ACS Appl Mater Interfaces 2020; 12:23514-23522. [PMID: 32329606 DOI: 10.1021/acsami.0c06263] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hydrogel bioelectronics as one of the next-generation wearable and implantable electronics ensures excellent biocompatibility and softness to link the human body and electronics. However, volatile, opaque, and fragile features of hydrogels due to the sparse and microscale three-dimensional network seriously limit their practical applications. Here, we report a type of smart and robust nanofibrillar poly(vinyl alcohol) (PVA) organohydrogels fabricated via one-step physical cross-linking. The nanofibrillar network cross-linked by numerous PVA nanocrystallites enables the formation of organohydrogels with high transparency (90%), drying resistance, high toughness (3.2 MJ/m3), and tensile strength (1.4 MPa). For strain sensor application, the PVA ionic organohydrogel after soaking in NaCl solution shows excellent linear sensitivity (GF = 1.56, R2 > 0.998) owing to the homogeneous nanofibrillar PVA network. We demonstrate the potential applications of the nanofibrillar PVA-based organohydrogel in smart contact lens and emotion recognition. Such a strategy paves an effective way to fabricate strong, tough, biocompatible, and ionically conductive organohydrogels, shedding light on multifunctional sensing applications in next-generation flexible bioelectronics.
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Affiliation(s)
- Xiang-Jun Zha
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Shu-Ting Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Jun-Hong Pu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Xing Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Kai Ke
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Lu Bai
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Wei Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
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18
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Dai CF, Du C, Xue Y, Zhang XN, Zheng SY, Liu K, Wu ZL, Zheng Q. Photodirected Morphing Structures of Nanocomposite Shape Memory Hydrogel with High Stiffness and Toughness. ACS Appl Mater Interfaces 2019; 11:43631-43640. [PMID: 31664813 DOI: 10.1021/acsami.9b16894] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Shape memory hydrogels have drawn increasing attention in recent years. Practical applications require these hydrogels to have good mechanical properties as well as contactless stimulations to trigger the shape deformations. Here we report a stiff and tough shape memory hydrogel that can transform to various configurations sequentially by phototriggered site-specific deformations. Response of the shape memory hydrogel to near-infrared (NIR) light irradiation was achieved by incorporating gold nanorods (AuNRs) into the glassy gel matrix of poly(methacrylic acid-co-methacrylamide) without compromising the excellent mechanical properties. Owing to the photothermal effect of the AuNRs, the localized temperature rise led to a dramatic decrease in Young's modulus (from 200 to 2 MPa) of the prestretched hydrogel and bending deformation with a programmable direction and amplitude. More complex three-dimensional configurations can be obtained by multidirectional prestretching and shape memorizing the individual parts of the nanocomposite hydrogel. Furthermore, the AuNRs embedded in the gel were aligned along the prestretching direction, leading to anisotropic plasmon resonance. These photomediated programmable deformations of tough shape memory hydrogels should find applications in the biomedical and engineering fields.
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Affiliation(s)
- Chen Fei Dai
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Cong Du
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Yao Xue
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , China
| | - Xin Ning Zhang
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Si Yu Zheng
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Kun Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , China
| | - Zi Liang Wu
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Qiang Zheng
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
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19
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Cai L, Li J, Quan S, Feng W, Yao J, Yang M, Li W. Dextran-based hydrogel with enhanced mechanical performance via covalent and non-covalent cross-linking units carrying adipose-derived stem cells toward vascularized bone tissue engineering. J Biomed Mater Res A 2019; 107:1120-1131. [PMID: 30431233 DOI: 10.1002/jbm.a.36580] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/18/2018] [Accepted: 11/05/2018] [Indexed: 12/14/2022]
Abstract
Hydrogels for biomedical applications were limited toward bone tissue engineering due to the poor mechanical performance. Tough hydrogels with strong and elastic features have received extensive attention, the application of which, however, was limited by their degradation. The present study introduced an approach to enhance mechanical properties of hydrogel while ensuring its degradation. Carboxyl dextran (Dex) was grafting modified by poly (ε-caprolactone) (PCL), sequentially followed by being cross-linked through polyethyleneglycol 400 (PEG400) to yield a gel with covalent cross-linking units in DMSO. The gel was underwent solvent displacement in H2 O to induce hydrophobic association of PCL to form non-covalent cross-linking units. The tough Dex-g-PCL hydrogel showed maximum strain of Dex-g-PCL hydrogel was 90% ± 6%, with the corresponding stress of 2.7 ± 0.2 MPa, which was significantly enhanced when comparing to dextran hydrogel (maximum strain 65% ± 5%, with the corresponding stress of 0.225 ± 0.06 MPa). Most hydrogel degraded after 12 w in vivo with only a little residues. Adipose-derived stem cells (ASCs) proliferated well after being seeded in hydrogel to form micro-mass at 14 days post-seeding. In vitro and in vivo angiogenesis, as well as in vitro osteogenesis illustrated the potential of the Dex-g-PCL hydrogel carrying ASCs toward vascularized bone tissue engineering. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1120-1131, 2019.
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Affiliation(s)
- Litao Cai
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Jitian Li
- Department of Biological Sciences, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Songtao Quan
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Wei Feng
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Junna Yao
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Minglu Yang
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
| | - Wuyin Li
- Department of Knee Joint Surgery, Henan Luoyang Orthopedic-Traumatological Hospital, Henan Orthopedic Hospital, Luoyang, China
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20
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Gan D, Han L, Wang M, Xing W, Xu T, Zhang H, Wang K, Fang L, Lu X. Conductive and Tough Hydrogels Based on Biopolymer Molecular Templates for Controlling in Situ Formation of Polypyrrole Nanorods. ACS Appl Mater Interfaces 2018; 10:36218-36228. [PMID: 30251533 DOI: 10.1021/acsami.8b10280] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Conductive hydrogels (CHs) have gained significant attention for their wide applications in biomedical engineering owing to their structural similarity to soft tissues. However, designing CHs that combine biocompatibility with good mechanical and electrical properties is still challenging. Herein, we report a new strategy for the fabrication of tough CHs with excellent conductivity, superior mechanical properties, and good biocompatibility by using chitosan framework as molecular templates for controlling conducting polypyrrole (PPy) nanorods in situ formation inside the hydrogel networks. First, polyacrylamide/chitosan (CS) interpenetrating polymer network hydrogel was synthesized by UV photopolymerization; second, hydrophobic and conductive pyrrole monomers were absorbed and fixed on CS molecular templates and then polymerized with FeCl3 in situ inner hydrophilic hydrogel network. This strategy ensured that the hydrophobic PPy nanorods were uniformly distributed and integrated with the hydrophilic polymer phase to form highly interconnected conductive path in the hydrogel, endowing the hydrogel with high conductivity (0.3 S/m). The CHs exhibited remarkable mechanical properties after the chelation of CS by Fe3+ and the formation of composites with the PPy nanorods (fracture energy 12 000 J m-2 and compression modulus 136.3 MPa). The use of a biopolymer molecular template to induce the formation of PPy nanostructures is an efficient strategy to achieve conductive multifunctional hydrogels.
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Affiliation(s)
- Donglin Gan
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
| | - Lu Han
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
| | - Menghao Wang
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
| | - Wensi Xing
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
| | - Tong Xu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang 621010 , China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials , Sichuan University , Chengdu , Sichuan 610064 , China
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510641 , China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , China
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21
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Yu K, Wang D, Wang Q. Tough and Self-Healable Nanocomposite Hydrogels for Repeatable Water Treatment. Polymers (Basel) 2018; 10:polym10080880. [PMID: 30960805 PMCID: PMC6403828 DOI: 10.3390/polym10080880] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 07/29/2018] [Accepted: 08/02/2018] [Indexed: 12/19/2022] Open
Abstract
Nanomaterials with ultrahigh specific surface areas are promising adsorbents for water-pollutants such as dyes and heavy metal ions. However, an ongoing challenge is that the dispersed nanomaterials can easily flow into the water stream and induce secondary pollution. To address this challenge, we employed nanomaterials to bridge hydrogel networks to form a nanocomposite hydrogel as an alternative water-pollutant adsorbent. While most of the existing hydrogels that are used to treat wastewater are weak and non-healable, we present a tough TiO₂ nanocomposite hydrogel that can be activated by ultraviolet (UV) light to demonstrate highly efficient self-healing, heavy metal adsorption, and repeatable dye degradation. The high toughness of the nanocomposite hydrogel is induced by the sequential detachment of polymer chains from the nanoparticle crosslinkers to dissipate the stored strain energy within the polymer network. The self-healing behavior is enabled by the UV-assisted rebinding of the reversible bonds between the polymer chains and nanoparticle surfaces. Also, the UV-induced free radicals on the TiO₂ nanoparticle can facilitate the binding of heavy metal ions and repeated degradation of dye molecules. We expect this self-healable, photo-responsive, tough hydrogel to open various avenues for resilient and reusable wastewater treatment materials.
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Affiliation(s)
- Kunhao Yu
- Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089, USA.
| | - Di Wang
- Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089, USA.
| | - Qiming Wang
- Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089, USA.
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22
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Zhao Y, Chen S, Hu J, Yu J, Feng G, Yang B, Li C, Zhao N, Zhu C, Xu J. Microgel-Enhanced Double Network Hydrogel Electrode with High Conductivity and Stability for Intrinsically Stretchable and Flexible All-Gel-State Supercapacitor. ACS Appl Mater Interfaces 2018; 10:19323-19330. [PMID: 29862800 DOI: 10.1021/acsami.8b05224] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present work, a new strategy is proposed to simultaneously enhance the toughness and electrochemical performance of the hydrogel with conductive microgel to form microgel-reinforced double network hydrogel. In this hydrogel, the conductive microgel is cross-linked to form the first network, which can dissipate energy to improve mechanical performance and stabilize the conductive network to improve the electrochemical performance. These hydrogels show excellent mechanical properties and good conductivity. When these hydrogels are assembled to all-gel-state intrinsically flexible and stretchable supercapacitor, they deliver outstanding capacitance. The strategy put forward here can extend the application scope of the hydrogel with multifunction.
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Affiliation(s)
- Yu Zhao
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Shuo Chen
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Jian Hu
- State Key Lab for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics , Xi'an Jiaotong University , Xi'an 710049 , China
| | - Jiali Yu
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Gengchao Feng
- ShenZhen Surg Science Medical Tech. Co., Ltd. Shenzhen 518012 , China
| | - Bo Yang
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Cuihua Li
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Ning Zhao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , PR China
| | - Caizhen Zhu
- College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Jian Xu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , PR China
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23
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Wang S, Guo G, Lu X, Ji S, Tan G, Gao L. Facile Soaking Strategy Toward Simultaneously Enhanced Conductivity and Toughness of Self-Healing Composite Hydrogels Through Constructing Multiple Noncovalent Interactions. ACS Appl Mater Interfaces 2018; 10:19133-19142. [PMID: 29756768 DOI: 10.1021/acsami.8b04999] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Tough and stretchable conductive hydrogels are desirable for the emerging field of wearable and implanted electronics. Unfortunately, most existing conductive hydrogels have low mechanical strength. Current strategies to enhance mechanical properties include employing tough host gel matrices or introducing specific interaction between conductive polymer and host gel matrices. However, these strategies often involve additional complicated processes. Here, a simple yet effective soaking treatment is employed to concurrently enhance mechanical and conductive properties, both of which can be facilely tailored by controlling the soaking duration. The significant improvements are correlated with co-occurring mechanism of deswelling and multiple noncovalent interactions. The resulting optimal sample exhibits attractive combination of high water content (75 wt %), high tensile stress (∼2.5 MPa), large elongation (>600%), reasonable conductivity (∼25 mS/cm), and fast self-healing property with the aid of hot water. The potential application of gel as a strain sensor is demonstrated. The applicability of this method is not limited to conductive hydrogels alone but can also be extended to strengthen other functional hydrogels with weak mechanical properties.
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Affiliation(s)
- Shuting Wang
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Guoqiang Guo
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Xiaoxuan Lu
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Guoxin Tan
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Liang Gao
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
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24
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Zhu F, Lin J, Wu ZL, Qu S, Yin J, Qian J, Zheng Q. Tough and Conductive Hybrid Hydrogels Enabling Facile Patterning. ACS Appl Mater Interfaces 2018; 10:13685-13692. [PMID: 29608271 DOI: 10.1021/acsami.8b01873] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Conductive polymer hydrogels (CPHs) that combine the unique properties of hydrogels and electronic properties of conductors have shown their great potentials in wearable/implantable electronic devices, where materials with remarkable mechanical properties, high conductivity, and easy processability are demanding. Here, we have developed a new type of polyion complex/polyaniline (PIC/PAni) hybrid hydrogels that are tough, conductive, and can be facilely patterned. The incorporation of conductive phase (PAni) into PIC matrix through phytic acid resulted in hybrid gels with ∼65 wt % water; high conductivity while maintaining the key viscoelasticity of the tough matrix. The gel prepared from 1 M aniline (Ani) exhibited the breaking strain, fracture stress, tensile modulus, and electrical conductivity of 395%, 1.15 MPa, 5.31 MPa, and 0.7 S/m, respectively, superior to the most existing CPHs. The mechanical and electrical performance of PIC/PAni hybrid hydrogels exhibited pronounced rate-dependent and self-recovery behaviors. The hybrid gels can effectively detect subtle human motions as strain sensors. Alternating conductive/nonconductive patterns can be readily achieved by selective Ani polymerization using stencil masks. This facile patterning method based on PIC/PAni gels can be readily scaled up for fast fabrication of wavy gel circuits and multichannel sensor arrays, enabling real-time monitoring of the large-extent and large-area deformations with various sensitivities.
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Affiliation(s)
| | | | | | | | - Jun Yin
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering , Zhejiang University , Hangzhou 310028 , China
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25
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Su D, Yao M, Liu J, Zhong Y, Chen X, Shao Z. Enhancing Mechanical Properties of Silk Fibroin Hydrogel through Restricting the Growth of β-Sheet Domains. ACS Appl Mater Interfaces 2017; 9:17489-17498. [PMID: 28470062 DOI: 10.1021/acsami.7b04623] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Usually, regenerated silk fibroin (RSF) hydrogels cross-linked by chemical agents such as horseradish peroxide (HRP)/H2O2 perform elastic properties, while display unsatisfactory strength for practical applications especially as load-bearing materials, and inadequate stability when incubated in a simulated in vivo environment. Here, the RSF hydrogel with both excellent strength and elasticity was prepared by inducing the conformation transition from random coil to β-sheet in a restricted RSF network precross-linked by HRP/H2O2. Such "dual-networked" hydrogels, regarding the one with 10 wt % RSF (Mw: 220 kDa) as a representative, show around 100% elongation, as well as the compressive modulus and tensile modulus up to 3.0 and 2.5 MPa respectively, which are much higher than those of physically cross-linked natural polymer hydrogels (commonly within 0.01-0.1 MPa at the similar solid content). It has been shown that the enhanced comprehensive mechanical properties of RSF hydrogels derive from the formation of small-sized and uniformly distributed β-sheet domains in the hydrogel during the conformation transition of RSF whose size is limited by the first network formed by cross-linkers with HRP/H2O2. Importantly, the tough RSF hydrogel changes the normally weak recognition of various RSF hydrogels and holds a great potential to be the material in biomedical field because it seems to be very promising regarding its biocompatibility, biodegradability, etc.
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Affiliation(s)
- Dihan Su
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , Shanghai 200433, P.R. China
| | - Meng Yao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , Shanghai 200433, P.R. China
| | - Jie Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , Shanghai 200433, P.R. China
| | - Yiming Zhong
- Fuels and Energy Technology Institute & Department of Chemical Engineering, Curtin University , Perth, Western Australia 6102, Australia
| | - Xin Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , Shanghai 200433, P.R. China
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , Shanghai 200433, P.R. China
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26
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Zhu F, Cheng L, Wang ZJ, Hong W, Wu ZL, Yin J, Qian J, Zheng Q. 3D-Printed Ultra tough Hydrogel Structures with Titin-like Domains. ACS Appl Mater Interfaces 2017; 9:11363-11367. [PMID: 28317377 DOI: 10.1021/acsami.7b02007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Titin is composed of repeated modular domains which unfold and dissipate energy upon loading. Here we employed such molecular-level paradigm to fabricate macroscopic ultratough hydrogel structures with titin-like domains, enabled by three-dimensional printing with multiple nozzles. Under stretch, the relatively thin and weak gel fibers in the printed structures break first and the hidden lengths postpone the failure of the main structures, mimicking the toughening principle in titin. These titin-like folded domains have been incorporated into a synthetic spider-web, which shows significantly enhanced extensibility and toughness. This work provides a new avenue of topological design for materials/structures with desired properties.
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Affiliation(s)
- Fengbo Zhu
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University , Hangzhou 310027, China
| | - Libo Cheng
- The State Key Laboratory of Fluid Power Transmission and Control Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University , Hangzhou 310028, China
| | - Zhi Jian Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou, 310027, China
| | - Wei Hong
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University , Hangzhou 310027, China
- Department of Aerospace Engineering, Iowa State University , Ames, Iowa 50010, United States
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University , Sapporo 060-0810, Japan
| | - Zi Liang Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou, 310027, China
| | - Jun Yin
- The State Key Laboratory of Fluid Power Transmission and Control Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University , Hangzhou 310028, China
| | - Jin Qian
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University , Hangzhou 310027, China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou, 310027, China
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27
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Han L, Lu X, Liu K, Wang K, Fang L, Weng LT, Zhang H, Tang Y, Ren F, Zhao C, Sun G, Liang R, Li Z. Mussel-Inspired Adhesive and Tough Hydrogel Based on Nanoclay Confined Dopamine Polymerization. ACS Nano 2017; 11:2561-2574. [PMID: 28245107 DOI: 10.1021/acsnano.6b05318] [Citation(s) in RCA: 462] [Impact Index Per Article: 66.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Adhesive hydrogels are attractive biomaterials for various applications, such as electronic skin, wound dressing, and wearable devices. However, fabricating a hydrogel with both adequate adhesiveness and excellent mechanical properties remains a challenge. Inspired by the adhesion mechanism of mussels, we used a two-step process to develop an adhesive and tough polydopamine-clay-polyacrylamide (PDA-clay-PAM) hydrogel. Dopamine was intercalated into clay nanosheets and limitedly oxidized between the layers, resulting in PDA-intercalated clay nanosheets containing free catechol groups. Acrylamide monomers were then added and in situ polymerized to form the hydrogel. Unlike previous single-use adhesive hydrogels, our hydrogel showed repeatable and durable adhesiveness. It adhered directly on human skin without causing an inflammatory response and was easily removed without causing damage. The adhesiveness of this hydrogel was attributed to the presence of enough free catechol groups in the hydrogel, which were created by controlling the oxidation process of the PDA in the confined nanolayers of clay. This mimicked the adhesion mechanism of the mussels, which maintain a high concentration of catechol groups in the confined nanospace of their byssal plaque. The hydrogel also displayed superior toughness, which resulted from nanoreinforcement by clay and PDA-induced cooperative interactions with the hydrogel networks. Moreover, the hydrogel favored cell attachment and proliferation, owning to the high cell affinity of PDA. Rat full-thickness skin defect experiments demonstrated that the hydrogel was an excellent dressing. This free-standing, adhesive, tough, and biocompatible hydrogel may be more convenient for surgical applications than adhesives that involve in situ gelation and extra agents.
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Affiliation(s)
- Lu Han
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Kezhi Liu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology of China , Guangzhou 510641, China
| | - Lu-Tao Weng
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology , Mianyang 621010, China
| | - Youhong Tang
- Centre for NanoScale Science and Technology and School of Computer Science, Engineering, and Mathematics, Flinders University , Adelaide 5042, South Australia, Australia
| | - Fuzeng Ren
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Cancan Zhao
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Guoxing Sun
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Rui Liang
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Zongjin Li
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
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28
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Abstract
Polyion complex (PIC) hydrogels have been proposed as promising engineered soft materials due to their high toughness and good processability. In this work, we reported manufacturing of complex structures with tough PIC hydrogels based on three-dimensional (3D) printing technology. The strategy relies on the distinct strength of ionic bonding in PIC hydrogels at different stages of printing. In concentrated saline solution, PIC forms viscous solution, which can be directly extruded out of a nozzle into water, where dialyzing out of salt and counterions results in sol-gel transition to form tough physical PIC gel with intricate structures. The printability of PIC solutions was systematically investigated by adjusting the PIC material formula and printing parameters in which proper viscosity and gelation rate were found to be key factors for successful 3D printing. Uniaxial tensile tests were performed to printed single fibers and multilayer grids, both exhibiting distinct yet controllable strength and toughness. More complex 3D structures with negative Poisson's ratio, gradient grid, and material anisotropy were constructed as well, demonstrating the flexible printability of PIC hydrogels. The methodology and capability here provide a versatile platform to fabricate complex structures with tough PIC hydrogels, which should broaden the use of such materials in applications such as biomedical devices and artificial tissues.
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Affiliation(s)
| | - Libo Cheng
- The State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University , Hangzhou 310028, China
| | - Jun Yin
- The State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University , Hangzhou 310028, China
| | | | | | - Jianzhong Fu
- The State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University , Hangzhou 310028, China
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Huang J, Zhao L, Wang T, Sun W, Tong Z. NIR-Triggered Rapid Shape Memory PAM-GO-Gelatin Hydrogels with High Mechanical Strength. ACS Appl Mater Interfaces 2016; 8:12384-12392. [PMID: 27116394 DOI: 10.1021/acsami.6b00867] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Shape memory hydrogels containing over 76 wt % of water were synthesized in a one-pot method, and interpenetrating double network was formed by physically cross-linked gelatin network and chemically cross-linked polyacrylamide (PAM) network with graphene oxide (GO). The temporary shape was quickly fixed by cooling in ice water for 30 s after deformation at 80 °C for 10 s. Shape recovery started in 10 s under near-infrared (NIR) irradiation and almost completed within 60 s depending on the curling angle. A small amount of GO in the hydrogels (≤1.5 mg/mL) played a key role in NIR energy absorption and transformation into thermal energy. The hydrogel without GO showed no response to the NIR irradiation and cannot recover to its permanent shape by NIR irradiation. Temperature sweep was conducted in the cycle of 20 °C → 80 °C → 20 °C, and the structure change in the hydrogels with temperature was investigated according to the storage modulus G' and tangent of the loss angle tan δ as a function of the hydrogel composition. The shape-memory capability was confirmed as the contribution from the triple-helix cross-linking network of gelatin. High mechanical toughness (strength > 400 kPa and broken strain > 500%) was achieved by the double-network with the sacrificial gelatin network and GO bridging to dissipate deformation energy. The optimized composition of the hydrogel was found to be a key point to realize stable temporary shape and rapid recovery to the permanent shape controlled by NIR irradiation with reasonable strength. The facile preparation and noncontact gentle stimulus of the present hydrogel hold great potential to be used in soft actuator materials.
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Affiliation(s)
- Jiahe Huang
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Lei Zhao
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Tao Wang
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Weixiang Sun
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Zhen Tong
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
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30
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Hong S, Sycks D, Chan HF, Lin S, Lopez GP, Guilak F, Leong KW, Zhao X. 3D Printing of Highly Stretchable and Tough Hydrogels into Complex, Cellularized Structures. Adv Mater 2015; 27:4035-40. [PMID: 26033288 PMCID: PMC4849481 DOI: 10.1002/adma.201501099] [Citation(s) in RCA: 448] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 04/20/2015] [Indexed: 04/14/2023]
Abstract
A 3D printable and highly stretchable tough hydrogel is developed by combining poly(ethylene glycol) and sodium alginate, which synergize to form a hydrogel tougher than natural cartilage. Encapsulated cells maintain high viability over a 7 d culture period and are highly deformed together with the hydrogel. By adding biocompatible nanoclay, the tough hydrogel is 3D printed in various shapes without requiring support material.
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Affiliation(s)
- Sungmin Hong
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Dalton Sycks
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Hon Fai Chan
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Shaoting Lin
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Gabriel P. Lopez
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Farshid Guilak
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
| | - Kam W. Leong
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - Xuanhe Zhao
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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31
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Hong S, Sycks D, Chan HF, Lin S, Lopez GP, Guilak F, Leong KW, Zhao X. 3D Printing: 3D Printing of Highly Stretchable and Tough Hydrogels into Complex, Cellularized Structures. Adv Mater 2015; 27:4034. [PMID: 26172844 DOI: 10.1002/adma.201570182] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
X. Zhao and co-workers develop on page 4035 a new biocompatible hydrogel system that is extremely tough and stretchable and can be 3D printed into complex structures, such as the multilayer mesh shown. Cells encapsulated in the tough and printable hydrogel maintain high viability. 3D-printed structures of the tough hydrogel can sustain high mechanical loads and deformations.
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Affiliation(s)
- Sungmin Hong
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
| | - Dalton Sycks
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
| | - Hon Fai Chan
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Shaoting Lin
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Gabriel P Lopez
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Farshid Guilak
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, 27710, USA
| | - Kam W Leong
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Xuanhe Zhao
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC, 27708, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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