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Self-Healing and Super-Elastomeric PolyMEA-co-SMA Nanocomposites Crosslinked by Clay Platelets. Gels 2022; 8:gels8100657. [PMID: 36286158 PMCID: PMC9601507 DOI: 10.3390/gels8100657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/07/2022] [Accepted: 10/12/2022] [Indexed: 11/04/2022] Open
Abstract
Novel solvent-free ultra-extensible, tough, and self-healing nanocomposite elastomers were synthesized. The self-assembled materials were based on the copolymer matrix poly(methoxyethyl acrylate-co-sodium methacrylate) physically crosslinked by clay nano-platelets (‘poly[MEA-co-SMA]/clay’). Depending on the content of SMA, the super-elastomers were predominantly hydrophobic, water-swelling, or fully water-soluble, and hence repeatedly processible. The SMA co-monomer introduces a tremendous increase in tensile strength, an increase in toughness, while ultra-extensibility is preserved. By tuning the contents of nano-clay and SMA co-monomer, a very wide range of product properties was achieved, including extreme ultra-extensibility, or high stiffness combined with more moderate super-extensibility, or very different values of tensile strength. There was very attractive, great improvement in autonomous self-healing ability induced by SMA, combined with tremendously enhanced self-recovery of internal mechanical damage: even complete self-recovery could be achieved. The ionic SMA repeat units were found to assemble to multiplets, which are phase-separated in the hydrophobic polyMEA matrix. The dynamics of SMA-units-hopping between these aggregates was of key importance for the mechanical, visco-elastic, tensile, and self-healing properties. The studied super-elastomers are attractive as advanced self-healing materials in engineering, soft robotics, and in medical or implant applications.
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2
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Jiang Z, He J, Wang X, Zhu D, Li N, Ren L, Yang G. Nanomaterial-based cell sheet technology for regenerative medicine and tissue engineering. Colloids Surf B Biointerfaces 2022; 217:112661. [PMID: 35777168 DOI: 10.1016/j.colsurfb.2022.112661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/16/2022] [Accepted: 06/23/2022] [Indexed: 10/17/2022]
Abstract
Nanomaterial-based cell sheet technology has been reported to be an effective method in regenerative medicine and tissue engineering. Here, we summarized several types of nanomaterials used to harvest cell sheets. Currently, the technology is divided into four categories according to the mechanisms: light-induced cell sheet technology, thermo-responsive cell sheet technology, magnetic-controlled cell sheet technology, and reactive oxygen species (ROS)-induced cell sheet technology. Furthermore, some studies have been conducted to show that nanomaterial-based cell sheets produce satisfying outcomes in the regeneration of bone, skeletal muscle, cardiac tissue, and tendon, as well as angiogenesis and osseointegration. Nevertheless, some shortcomings still exist, such as comprehensive preparation, unclear safety, and cell quality. Thus, future studies should aim to produce more types of nanomaterials to solve this problem.
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Affiliation(s)
- Zhiwei Jiang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Jin He
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Xueting Wang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Danji Zhu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Na Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Lingfei Ren
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China
| | - Guoli Yang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China.
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Byś K, Strachota B, Strachota A, Pavlova E, Steinhart M, Mossety-Leszczak B, Zając W. Novel Tough and Transparent Ultra-Extensible Nanocomposite Elastomers Based on Poly(2-methoxyethylacrylate) and Their Switching between Plasto-Elasticity and Viscoelasticity. Polymers (Basel) 2021; 13:polym13234254. [PMID: 34883757 PMCID: PMC8659642 DOI: 10.3390/polym13234254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/23/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022] Open
Abstract
Novel stiff, tough, highly transparent and ultra-extensible self-assembled nanocomposite elastomers based on poly(2-methoxyethylacrylate) (polyMEA) were synthesized. The materials are physically crosslinked by small in-situ-formed silica nanospheres, sized 3-5 nm, which proved to be a very efficient macro-crosslinker in the self-assembled network architecture. Very high values of yield stress (2.3 MPa), tensile strength (3.0 MPa), and modulus (typically 10 MPa), were achieved in combination with ultra-extensibility: the stiffest sample was breaking at 1610% of elongation. Related nanocomposites doubly filled with nano-silica and clay nano-platelets were also prepared, which displayed interesting synergy effects of the fillers at some compositions. All the nanocomposites exhibit 'plasto-elastic' tensile behaviour in the 'as prepared' state: they display considerable energy absorption (and also 'necking' like plastics), but at the same time a large but not complete (50%) retraction of deformation. However, after the first large tensile deformation, the materials irreversibly switch to 'real elastomeric' tensile behaviour (with some creep). The initial 'plasto-elastic' stretching thus causes an internal rearrangement. The studied materials, which additionally are valuable due to their high transparency, could be of application interest as advanced structural materials in soft robotics, in implant technology, or in regenerative medicine. The presented study focuses on structure-property relationships, and on their effects on physical properties, especially on the complex tensile, elastic and viscoelastic behaviour of the polyMEA nanocomposites.
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Affiliation(s)
- Katarzyna Byś
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, CZ-162 06 Praha, Czech Republic; (K.B.); (B.S.); (E.P.); (M.S.)
| | - Beata Strachota
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, CZ-162 06 Praha, Czech Republic; (K.B.); (B.S.); (E.P.); (M.S.)
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, CZ-162 06 Praha, Czech Republic; (K.B.); (B.S.); (E.P.); (M.S.)
- Correspondence: ; Tel.: +420-296-809-451
| | - Ewa Pavlova
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, CZ-162 06 Praha, Czech Republic; (K.B.); (B.S.); (E.P.); (M.S.)
| | - Miloš Steinhart
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovskeho nam. 2, CZ-162 06 Praha, Czech Republic; (K.B.); (B.S.); (E.P.); (M.S.)
| | - Beata Mossety-Leszczak
- Department of Industrial and Materials Chemistry, Faculty of Chemistry, Rzeszow University of Technology, al. Powstancow Warszawy 6, 35-959 Rzeszow, Poland;
| | - Weronika Zając
- Doctoral School of Engineering and Technical Sciences at the Rzeszow University of Technology, al. Powstancow Warszawy 12, 35-959 Rzeszow, Poland;
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4
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Kurokawa N, Endo F, Bito K, Maeda T, Hotta A. Antithrombogenic poly(2-methoxyethyl acrylate) elastomer via triblock copolymerization with poly(methyl methacrylate). POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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5
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Strachota B, Strachota A, Steinhart M, Šlouf M, Hodan J. Ultra‐extensible solvent‐free elastomers based on nanocomposite poly(2‐methoxyethylacrylate)/clay xerogels. J Appl Polym Sci 2021. [DOI: 10.1002/app.49836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Beata Strachota
- Institute of Macromolecular Chemistry Czech Academy of Sciences Praha Czech Republic
| | - Adam Strachota
- Institute of Macromolecular Chemistry Czech Academy of Sciences Praha Czech Republic
| | - Miloš Steinhart
- Institute of Macromolecular Chemistry Czech Academy of Sciences Praha Czech Republic
| | - Miroslav Šlouf
- Institute of Macromolecular Chemistry Czech Academy of Sciences Praha Czech Republic
| | - Jiří Hodan
- Institute of Macromolecular Chemistry Czech Academy of Sciences Praha Czech Republic
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Gaharwar AK, Cross LM, Peak CW, Gold K, Carrow JK, Brokesh A, Singh KA. 2D Nanoclay for Biomedical Applications: Regenerative Medicine, Therapeutic Delivery, and Additive Manufacturing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1900332. [PMID: 30941811 PMCID: PMC6546555 DOI: 10.1002/adma.201900332] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/23/2019] [Indexed: 05/03/2023]
Abstract
Clay nanomaterials are an emerging class of 2D biomaterials of interest due to their atomically thin layered structure, charged characteristics, and well-defined composition. Synthetic nanoclays are plate-like polyions composed of simple or complex salts of silicic acids with a heterogeneous charge distribution and patchy interactions. Due to their biocompatible characteristics, unique shape, high surface-to-volume ratio, and charge, nanoclays are investigated for various biomedical applications. Here, a critical overview of the physical, chemical, and physiological interactions of nanoclay with biological moieties, including cells, proteins, and polymers, is provided. The state-of-the-art biomedical applications of 2D nanoclay in regenerative medicine, therapeutic delivery, and additive manufacturing are reviewed. In addition, recent developments that are shaping this emerging field are discussed and promising new research directions for 2D nanoclay-based biomaterials are identified.
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Affiliation(s)
- Akhilesh K Gaharwar
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
- Material Science and Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
- Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX, 77843, USA
| | - Lauren M Cross
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Charles W Peak
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Karli Gold
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - James K Carrow
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Anna Brokesh
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Kanwar Abhay Singh
- Biomedical Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, TX, 77843, USA
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Yanagie M, Kaneko Y. Preparation of irrefrangible polyacrylamide hybrid hydrogels using water-dispersible cyclotetrasiloxane or polyhedral oligomeric silsesquioxane containing polymerizable groups as cross-linkers. Polym Chem 2018. [DOI: 10.1039/c8py00354h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Irrefrangible polyacrylamide hybrid hydrogels were prepared using polymerizable siloxane oligomers as cross-linkers (CyTS-MNa and POSS-MNa, respectively).
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Affiliation(s)
- Makoto Yanagie
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
| | - Yoshiro Kaneko
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
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Zhao LZ, Zhou CH, Wang J, Tong DS, Yu WH, Wang H. Recent advances in clay mineral-containing nanocomposite hydrogels. SOFT MATTER 2015; 11:9229-9246. [PMID: 26435008 DOI: 10.1039/c5sm01277e] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Clay mineral-containing nanocomposite hydrogels have been proven to have exceptional composition, properties, and applications, and consequently have attracted a significant amount of research effort over the past few years. The objective of this paper is to summarize and evaluate scientific advances in clay mineral-containing nanocomposite hydrogels in terms of their specific preparation, formation mechanisms, properties, and applications, and to identify the prevailing challenges and future directions in the field. The state-of-the-art of existing technologies and insights into the exfoliation of layered clay minerals, in particular montmorillonite and LAPONITE®, are discussed first. The formation and structural characteristics of polymer/clay nanocomposite hydrogels made from in situ free radical polymerization, supramolecular assembly, and freezing-thawing cycles are then examined. Studies indicate that additional hydrogen bonding, electrostatic interactions, coordination bonds, hydrophobic interaction, and even covalent bonds could occur between the clay mineral nanoplatelets and polymer chains, thereby leading to the formation of unique three-dimensional networks. Accordingly, the hydrogels exhibit exceptional optical and mechanical properties, swelling-deswelling behavior, and stimuli-responsiveness, reflecting the remarkable effects of clay minerals. With the pivotal roles of clay minerals in clay mineral-containing nanocomposite hydrogels, the nanocomposite hydrogels possess great potential as superabsorbents, drug vehicles, tissue scaffolds, wound dressing, and biosensors. Future studies should lay emphasis on the formation mechanisms with in-depth insights into interfacial interactions, the tactical functionalization of clay minerals and polymers for desired properties, and expanding of their applications.
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Affiliation(s)
- Li Zhi Zhao
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), Institute of Advanced Catalytic Materials, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Chun Hui Zhou
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), Institute of Advanced Catalytic Materials, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China. and Key Laboratory of Clay Minerals of Ministry of Land and Resources of The People's Republic of China, Engineering Research Center of Non-metallic Minerals of Zhejiang Province, Zhejiang Institute of Geology and Mineral Resource, Hangzhou 310007, China
| | - Jing Wang
- Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Queensland 4350, Australia.
| | - Dong Shen Tong
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), Institute of Advanced Catalytic Materials, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Wei Hua Yu
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), Institute of Advanced Catalytic Materials, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Hao Wang
- Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Queensland 4350, Australia.
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Haraguchi K, Takehisa T, Mizuno T, Kubota K. Antithrombogenic Properties of Amphiphilic Block Copolymer Coatings: Evaluation of Hemocompatibility Using Whole Blood. ACS Biomater Sci Eng 2015; 1:352-362. [PMID: 33445240 DOI: 10.1021/acsbiomaterials.5b00079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Antithrombogenicity is one of the most critical properties required for materials used in biomedical devices, particularly in devices that contact blood. The antithrombogenicity of surfaces coated with amphiphilic block copolymers composed of hydrophobic poly(2-methoxyethyl acrylate) (M) and hydrophilic poly(N,N-dimethylacrylamide) (D) segments was investigated using plasma protein and whole blood with regard to protein adsorption, thrombus formation, platelet activation, and clotting kinetics. Three types of block copolymers and a random copolymer were synthesized using one-pot reversible addition-fragmentation chain-transfer (RAFT) polymerization under conditions of high yield and high molecular weight. Triblock and 4-arm block copolymers with MDM and (MD)4 architecture, respectively, showed good adhesion to both organic and inorganic substrates, including polyvinyl chloride (PVC) tubes, and the resulting coated surfaces showed superior protein repellency and hemocompatibility compared to the diblock or random copolymer coatings and noncoated control. In a Chandler-loop method with whole blood, PVC tubes coated with MDM and (MD)4 showed improved thromboresistance and adsorption resistance to blood-derived proteins. This high hemocompatibility was also confirmed with human whole blood by thrombelastography (suppression of blood-clotting behavior in both intrinsic and extrinsic coagulation pathways) and platelet function analyses (significant reductions in the aggregation activity of platelets under two types of stimulation). The antithrombogenicity has been discussed based on the structural analyses of the MDM-coated surface. The results of this study will enable the development of more effective biomedical and analytical devices with excellent antithrombogenic characteristics by using a simple and environmentally friendly approach.
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Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575 Japan
| | - Toru Takehisa
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Central Research Laboratories, DIC Co., Sakura, Chiba 285-8668, Japan
| | - Toshihide Mizuno
- Department of Artificial Organs, Research Institute, National Cerebral and Cardiovascular Center, Suita, Osaka, 565-8565, Japan
| | - Kazuomi Kubota
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Central Research Laboratories, DIC Co., Sakura, Chiba 285-8668, Japan
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10
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Abstract
Different types of cationic clay minerals and their applications in various biological systems.
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Affiliation(s)
- M. Ghadiri
- University of Sydney
- Faculty of Pharmacy
- Sydney
- Australia
| | - W. Chrzanowski
- University of Sydney
- Faculty of Pharmacy
- Sydney
- Australia
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Centre for Regenerative Medicine
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12
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Haraguchi K, Kubota K, Takada T, Mahara S. Highly Protein-Resistant Coatings and Suspension Cell Culture Thereon from Amphiphilic Block Copolymers Prepared by RAFT Polymerization. Biomacromolecules 2014; 15:1992-2003. [DOI: 10.1021/bm401914c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
- Department
of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Izumi-cho, Narashino, Chiba, 275-8575, Japan
| | - Kazuomi Kubota
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
| | - Tetsuo Takada
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
| | - Saori Mahara
- Material Chemistry
Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba, 285-0078, Japan
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13
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Haraguchi K. Soft Nanohybrid Materials Consisting of Polymer–Clay Networks. ORGANIC-INORGANIC HYBRID NANOMATERIALS 2014. [DOI: 10.1007/12_2014_287] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Haraguchi K, Takada T. Polymer-Clay Nanocomposite Microspheres and their Thermosensitive Characteristics. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300593] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research; 631 Sakado, Sakura Chiba 285-0078 Japan
| | - Tetsuo Takada
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research; 631 Sakado, Sakura Chiba 285-0078 Japan
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Haraguchi K, Murata K, Takehisa T. Stimuli-Responsive Properties of Nanocomposite Gels Comprising (2-methoxyethylacrylate-co-N,N-dimethylacrylamide) Copolymer-Clay Networks. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/masy.201300026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry Laboratory; Kawamura Institute of Chemical Research; 631 Sakado; Sakura; Chiba; 285-0078; Japan
| | - Kazutaka Murata
- Material Chemistry Laboratory; Kawamura Institute of Chemical Research; 631 Sakado; Sakura; Chiba; 285-0078; Japan
| | - Toru Takehisa
- Material Chemistry Laboratory; Kawamura Institute of Chemical Research; 631 Sakado; Sakura; Chiba; 285-0078; Japan
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Extraordinary Properties and New Functions of Nanocomposite Gels and Soft Nanocomposites with Unique Organic/Inorganic Network Structures. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/amr.680.65] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New types of polymer hydrogels and nanocomposites, i.e., nanocomposite gels (NC gels) and soft, polymer nanocomposites (M-NCs), with novel organic/inorganic network structures have been fabricated. Both NC gels and M-NCs were synthesized by in-situ free-radical polymerization in the presence of exfoliated clay platelets in aqueous systems and were obtained in various forms and sizes with a wide range of clay contents. Here, disk-like inorganic clay nanoparticles act as multi-functional crosslinkers to form new types of network systems. NC gels have extraordinary optical, mechanical, and swelling/deswelling properties, as well as a number of new characteristics relating to optical anisotropy, polymer/clay morphology, biocompatibility, stimuli-sensitive surfaces, micro-patterning, self-healing, etc. The M-NCs also exhibit dramatic improvements in optical and mechanical properties including ultra-high reversible extensibility and well-defined yielding behavior, despite their high clay contents. The M-NC also showed thermoresponsive cell adhesion/detachment. Thus, the serious disadvantages (intractability, mechanical fragility, optical turbidity, poor processing ability, low stimulus sensitivity, etc.) associated with the conventional, chemically-crosslinked polymeric materials were overcome in NC gels and M-NCs.
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Kotobuki N, Murata K, Haraguchi K. Proliferation and harvest of human mesenchymal stem cells using new thermoresponsive nanocomposite gels. J Biomed Mater Res A 2012; 101:537-46. [PMID: 22926940 DOI: 10.1002/jbm.a.34355] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 06/29/2012] [Accepted: 07/02/2012] [Indexed: 12/27/2022]
Abstract
For tissue engineering and regenerative medicine, stem cells should be effectively cultured in vitro. New thermoresponsive nanocomposite gels (MD-NC gels), consisting of inorganic clay (hectorite) and copolymers composed of hydrophobic 2-methoxyethyl acrylate (MEA) and hydrophilic N,N-dimethylacrylamide (DMAA) units, could be applied in cell culture and cell harvesting without trypsinization, specifically using mesenchymal stem cells (MSCs). The composition of the MD-NC gel (the ratio of the two monomer types and the clay content) was found to determine its swelling properties in the culture medium, thermosensitivity, protein adsorption, and cell attachment and proliferation. Various kinds of human cells, including MSCs, osteoblast (HOS) cells, fibroblast (NHDF) cells, and epithelial cells could be effectively cultured on MD-NC gels. In particular, on an MD10-NC2 gel with relatively low DMAA and clay content, the cells could be harvested by decreasing the temperature, either as a cell sheet (MSCs or NHDF cells) or as a population of suspension cells (HOS cells). Further, it was found that the MD10-NC2 gel is suitable for stem cell differentiation. Because of their thermosensitivity, controllable modulus, and surface properties, MD-NC gels are promising cell culture substrates useful for tissue engineering and regenerative medicine.
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Affiliation(s)
- Noriko Kotobuki
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba 285-0078, Japan
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Haraguchi K. Development of soft nanocomposite materials and their applications in cell culture and tissue engineering. J Stem Cells Regen Med 2012. [PMID: 24693187 PMCID: PMC3908302 DOI: 10.46582/jsrm.0801002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Novel soft nanocomposite materials with unique organic/inorganic network structures have been developed by extending the strategy of “organic/inorganic nanocomposites” to the field of soft materials. The structures described here were synthesized by in-situ free-radical polymerization of various monomers in the presence of exfoliated clay (hectorite) in aqueous media. The nanocomposite hydrogels (NC gels) and soft nanocomposites (M-NCs) obtained were flexible and transparent soft materials, regardless of the clay content, that could be prepared in various shapes and surface forms, each consisting of individually different polymer/clay network structures. Owing to these unique network structures, both NC gels and M-NCs showed extraordinary mechanical properties such as ultrahigh elongation at break and widely controlled modulus and strength, which could overcome the problems (e.g., mechanical fragility, optical turbidity, poor processing ability) associated with conventional chemically crosslinked materials. In addition, the NC gels and M-NCs exhibited a number of new characteristics related to optical anisotropy, morphology, biocompatibility, stimulus sensitivity and cell culture. In the present review, we outline the novel features of these soft nanocomposites, and demonstrate their potential as soft culture substrates useful for tissue engineering as well as soft, transparent, absorbing, and mechanically tough biomaterials for many bio-applications.
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Affiliation(s)
- K Haraguchi
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research , Chiba, Japan
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19
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Haraguchi K. Synthesis and properties of soft nanocomposite materials with novel organic/inorganic network structures. Polym J 2011. [DOI: 10.1038/pj.2010.141] [Citation(s) in RCA: 177] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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