Self-healable, tough and highly stretchable ionic nanocomposite physical hydrogels
作者： Ming Zhong , Xiao-Ying Liu , Fu-Kuan Shi , Li-Qin Zhang , Xi-Ping Wang
DOI: 10.1039/C5SM00493D
关键词: Toughness 、 Polymer 、 Ionic bonding 、 Polymer chemistry 、 Self-healing hydrogels 、 Chemical engineering 、 Materials science 、 Monomer 、 Nanocomposite 、 Acrylic acid 、 Ultimate tensile strength
摘要: We present a facile strategy to synthesize self-healable tough and highly stretchable hydrogels. Our design rationale for the creation of ionic cross-linked hydrogels is graft an acrylic acid monomer on surface vinyl hybrid silica nanoparticles (VSNPs) growth poly(acrylic) (PAA), obtained VSNP–PAA nanobrush can be used as gelator. Physical cross-linking through hydrogen bonding ferric ion-mediated interactions between PAA polymer chains gelators yielded nanocomposite physical with excellent balanced mechanical properties (tensile strength 860 kPa, elongation at break ∼2300%), ability self-repair ∼560 ∼1800%). The toughness stretchability arise from reversible that help dissipate energy stress (deformation) triggered dynamic processes. These unique will enable greater application these hydrogel materials, especially in tissue engineering.
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