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      A Mechanically Strong, Highly Stable, Thermoplastic, and Self-Healable Supramolecular Polymer Hydrogel

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          Abstract

          Polymerization of glycinamide-conjugated monomer alone in concentrated aqueous solution enables facile formation of a mechanically strong and a highly stable supramolecular polymer (SP) hydrogel because of the cooperatively hydrogen-bonded crosslinking and strengthening effect from dual amide motifs. This SP hydrogel exhibits thermoplastic processability, injectability, and self-reparability because of the dynamic destruction and reconstruction of hydrogen bonds in response to temperature change.

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          Nanocomposite Hydrogels: A Unique Organic–Inorganic Network Structure with Extraordinary Mechanical, Optical, and Swelling/De-swelling Properties

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            High-water-content mouldable hydrogels by mixing clay and a dendritic molecular binder.

            With the world's focus on reducing our dependency on fossil-fuel energy, the scientific community can investigate new plastic materials that are much less dependent on petroleum than are conventional plastics. Given increasing environmental issues, the idea of replacing plastics with water-based gels, so-called hydrogels, seems reasonable. Here we report that water and clay (2-3 per cent by mass), when mixed with a very small proportion (<0.4 per cent by mass) of organic components, quickly form a transparent hydrogel. This material can be moulded into shape-persistent, free-standing objects owing to its exceptionally great mechanical strength, and rapidly and completely self-heals when damaged. Furthermore, it preserves biologically active proteins for catalysis. So far no other hydrogels, including conventional ones formed by mixing polymeric cations and anions or polysaccharides and borax, have been reported to possess all these features. Notably, this material is formed only by non-covalent forces resulting from the specific design of a telechelic dendritic macromolecule with multiple adhesive termini for binding to clay.
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              The Polyrotaxane Gel: A Topological Gel by Figure-of-Eight Cross-links

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                Author and article information

                Journal
                Advanced Materials
                Adv. Mater.
                Wiley
                09359648
                June 2015
                June 2015
                May 06 2015
                : 27
                : 23
                : 3566-3571
                Affiliations
                [1 ]School of Materials Science and Engineering; Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 PR China
                [2 ]Research Center of Traditional Chinese Medicine; Tianjin University of Traditional Chinese Medicine; Tianjin 300193 PR China
                Article
                10.1002/adma.201500534
                25946310
                eacc4603-90ce-40bd-b00f-7562ea116239
                © 2015

                http://doi.wiley.com/10.1002/tdm_license_1.1

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