Preparation and Characterization of Cys-PVA/HEC Triple Shape Memory Hydrogel

LING Hang-li; SHEN Yong; PAN Hong; LI Kai; NI Kai; SHEN Nan

doi:10.14028/j.cnki.1003-3726.2022.12.007

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Preparation and Characterization of Cys-PVA/HEC Triple Shape Memory Hydrogel

更新时间：2022-10-17

- Preparation and Characterization of Cys-PVA/HEC Triple Shape Memory Hydrogel
- Polymer Bulletin Vol. 35, Issue 12, Pages: 62-72(2022)
- 作者机构：
  
  上海工程技术大学纺织服装学院，上海　201620
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2022.12.007
  CLC：
- Published：20 December 2022，
  
  Received：09 June 2021，
  
  Revised：03 November 2021，
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LING Hang-li, SHEN Yong, PAN Hong, LI Kai, NI Kai, SHEN Nan. Preparation and Characterization of Cys-PVA/HEC Triple Shape Memory Hydrogel. [J]. Polymer Bulletin 35(12):62-72(2022)
DOI：

LING Hang-li, SHEN Yong, PAN Hong, LI Kai, NI Kai, SHEN Nan. Preparation and Characterization of Cys-PVA/HEC Triple Shape Memory Hydrogel. [J]. Polymer Bulletin 35(12):62-72(2022) DOI： 10.14028/j.cnki.1003-3726.2022.12.007.

摘要

基于超分子作用与动态共价键

制备一种具有形状记忆功能的水凝胶。聚乙烯醇(PVA)作为水凝胶主体

通过酯化反应将

-半胱氨酸(Cys)接枝在PVA 上形成共聚物

-半胱氨酸-聚乙烯醇(Cys-PVA)。随后加入羟乙基纤维素(HEC)引入双网络结构提高水凝胶的机械性能

与Cys-PVA制备出

-半胱氨酸-聚乙烯醇/羟乙基纤维素(Cys-PVA/HEC)复合水凝胶。红外光谱与核磁共振表征结果表明

PVA 与Cys反应摩尔比

(PVA)∶

(Cys)=1∶1

酯化反应18 h时

PVA 的羟基上几乎全接枝上Cys。扫描电镜(SEM)与比表面积和孔径分布测试观察到Cys-PVA/HEC水凝胶有明显的网状多孔结构。形状记忆测试表明

Cys-PVA/HEC水凝胶具有多响应的三重形状记忆。机械性能测试表明

加入HEC改善了Cys-PVA/HEC水凝胶机械性能

但也影响了其形状记忆性能

当HEC添加量为0.4 g时水凝胶性能较好。

Abstract

Based on supramolecular action and dynamic covalent bonds

a hydrogel with shape memory function was prepared. Poly(vinyl alcohol) (PVA) was used as the main body of the hydrogel

and

-cysteine (Cys) was grafted onto PVA through an esterification reaction to form a copolymer of

-cysteine-polyvinyl alcohol (Cys-PVA). Subsequently

hydroxyethyl cellulose (HEC) was added to introduce a double network structure to improve the mechanical properties of the hydrogel

and to prepare L-cysteine-polyvinyl alcohol/hydroxyethyl cellulose (Cys-PVA/HEC) by combining with Cys- PVA. The results of infrared spectroscopy and nuclear magnetic resonance showed that the reaction molar ratio of PVA to Cys was

(PVA)∶

(Cys)=1∶1. When the esterification reaction was 18 h

almost all the hydroxyl groups of PVA were grafted with Cys. Scanning electron microscopy (SEM) and BET surface area observed that Cys-PVA/HEC hydrogel has obvious network porous structure. The shape memory test shows that Cys-PVA/HEC hydrogel has multi-response triple shape memory. The mechanical performance test showed that the addition of HEC improved the mechanical performance of Cys-PVA/HEC hydrogel

but also affected its shape memory performance. The hydrogel performance was better when the amount of HEC added was 0.4 g.

关键词

水凝胶聚乙烯醇L-半胱氨酸羟乙基纤维素形状记忆

Keywords

HydrogelPoly(vinyl alcohol)L-cysteineCelluloseShape memory

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