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Facile preparation of low swelling,high strength,self-healing and pH-responsive hydrogels based on the triple-network structure

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Frontiers of Materials Science 2019年第1期13卷 54-63页

作者： Zhicun WANG Xiaoman HAN Yixi WANG Kenan MEN Lin CUI Jianning WU Guihua MENG Zhiyong LIU Xuhong GUO School of Chemistry and Chemical Engineering Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang BingtuanShihezi 832003China Bingtuan Sishi Hospital Yili 835000China School of Medicine Shihezi UniversityShihezi 832003China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

A polyacrylic acid(PAA)/gelatin(Gela)/polyvinyl alcohol(PVA)hydrogel was prepared by copolymerization,cooling,and freezing/thawing *** triplenetwork(TN)structure hydrogel displayed superior mechanical properties,low swelling ratio and self-healing properties,The superior mechanical properties are attributed to the triple helix association of Gela and PVA crystallites by reversible hydrogen *** characterization results indicated that the fracture stress and the strain were 808 kPa and 370% respectively,while the compression strength could reach 4443 kPa and the compressive modulus was up to 39 MPa under the deformation of 90%.The hydrogen bonding in PVA contributed to maintain and improve the self-healing ability of *** type of hydrogels exhibited a higher swelling ratio under alkaline conditions,and the swelling ratios of PAA,PAA/PVA and PAA/Gela hydrogels were 27.71,12.30 and 9.09,*** PAA/Gela/PVA TN hydrogel showed the lowest swelling ratio(6.57)among these *** results indicate that the novel TN hydrogels possess good environmental adaptability and have potential applications in the biomedical engineering and sensor field.

关键词： hydrogel triple-network structure mechanical property swelling selfhealing

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