Rapid self-healing and self-adhesive chitosan-based hydrogels by host-guest interaction and dynamic covalent bond as flexible sensor

编号 020031604

推送时间 20211108

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Rapid self-healing and self-adhesive chitosan-based hydrogels by host-guest interaction and dynamic covalent bond as flexible sensor

来源期刊 Carbohydrate Polymers

期 第316期

发表时间 20210804

关键词 Conductive hydrogel;  Chitosan;  Poly(vinyl alcohol);  Host-guest interactions;  Self-healing;  Self-adhesiveness;  Flexible strain sensor; 

摘要 A sensor used to monitor tissue deformation requires good flexibility, stretchability, self-adhesion, cyto-compatibility, and?antibacterial property. Here, we prepared hydrogel sensor based on?O-carboxymethyl chitosan (O-CMCS) and poly(vinyl alcohol) (PVA) for monitoring human and organ motions. Based on the host-guest complexing of poly(β-cyclodextrin) with diamantane, a cross-linker containing multiple?aldehyde?groups was prepared for cross-linking with O-CMCS through?Schiff base?linkages.?Borax?was used as the second cross-linker to cross-link PVA through dynamic?borate ester?bonds. Carbon nanotubes (CNTs) were added into the hydrogels to improve their?electrical conductivity?and mechanical properties. The obtained hydrogel exhibited rapid self-healing ability with healing efficiency as high as 97%–103% (in 15?s), good adhesion to human skin and wet organ, good antibacterial property, cyto-compatibility, and stretchability. Furthermore, the hydrogel sensor can monitor the?respiratory movement?of porcine lungs and the beating of rat hearts.

服务人员 尚玮姣

服务院士 宋湛谦

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