具有优异自恢复性能的高强度聚电解质复合物水凝胶

袁涛; 孙俊奇

doi:10.11777/j.issn1000-3304.2019.19093

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具有优异自恢复性能的高强度聚电解质复合物水凝胶

研究论文 | 更新时间：2021-01-26

- 具有优异自恢复性能的高强度聚电解质复合物水凝胶
  增强出版
- Polyelectrolyte Complexes-based Hydrogels with High Mechanical Strength and Excellent Self-recovery
- 高分子学报 2019年50卷第12期页码：1263-1271
- 作者机构：
  
  超分子结构与材料国家重点实验室吉林大学化学学院　长春 130012
- 作者简介：
  
  E-mail: sun_junqi@jlu.edu.cn Junqi Sun, E-mail: sun_junqi@jlu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 21774049)资助项目()
- DOI：10.11777/j.issn1000-3304.2019.19093
  中图分类号：
- 纸质出版日期：2019-12，
  
  网络出版日期：2019-8-23，
  
  收稿日期：2019-5-5，
  
  修回日期：2019-7-13，
扫描看全文
袁涛, 孙俊奇. 具有优异自恢复性能的高强度聚电解质复合物水凝胶[J]. 高分子学报, 2019,50(12):1263-1271.

Tao Yuan, Jun-qi Sun. Polyelectrolyte Complexes-based Hydrogels with High Mechanical Strength and Excellent Self-recovery[J]. Acta Polymerica Sinica, 2019,50(12):1263-1271.
袁涛, 孙俊奇. 具有优异自恢复性能的高强度聚电解质复合物水凝胶[J]. 高分子学报, 2019,50(12):1263-1271. DOI： 10.11777/j.issn1000-3304.2019.19093.

Tao Yuan, Jun-qi Sun. Polyelectrolyte Complexes-based Hydrogels with High Mechanical Strength and Excellent Self-recovery[J]. Acta Polymerica Sinica, 2019,50(12):1263-1271. DOI： 10.11777/j.issn1000-3304.2019.19093.

摘要

具有高力学强度和优异自恢复性能的水凝胶在组织工程、可拉伸电子器件及可穿戴设备等领域具有潜在的应用价值. 本工作通过将4-甲酰苯-1

3-二磺酸修饰的聚乙烯醇(SPVA)与线形聚乙烯亚胺(LPEI)在水溶液中复合，并经过塑形、干燥和水浸泡过程，制备了具有优异自恢复性能的高强度聚电解质复合物水凝胶. 凝胶中强的静电作用和弱的氢键作用的协同作用使该水凝胶具有高的断裂强度和韧性，其断裂强度和韧性可达 ~ 10.0 MPa和 ~ 14.21 MJ/m

. 该水凝胶被拉伸到200%后，室温下不需要任何外界刺激，在1 h内就可完全恢复其初始形状和力学性能.

Abstract

Polymeric hydrogels with high mechanical strength and excellent self-recovery are useful in tissue engineering

stretchable electronics and wearable devices. In this work

polyelectrolyte complexes-based hydrogels with high mechanical strength and excellent self-recovery are fabricated by complexation of poly(vinyl alcohol) modified with benzaldehyde-2

4-disulfonic acid disodium salt (BADS) (denoted as SPVA) with linear poly(ethylenimine) (LPEI) in aqueous solution followed by molding

drying and rehydration. The mechanical properties of the LPEI

%-SPVA

hydrogels

where

% represents the molar ratio of BADS to the monomer molar ratio of PVA

and

represent the feed mass ratio of LPEI to SPVA

can be well-tailored by varying the parameters such as the grafting ratio of BADS on SPVA and mass ratio of LPEI to SPVA. Stress-strain measurements indicate that the LPEI

/18%-SPVA

hydrogels have the highest mechanical strength

with a tensile strength of ~ 10.0 MPa and a toughness of ~ 14.21 MJ/m

. A piece of the LPEI

/18%-SPVA

hydrogel strip with a width of 2 mm and thickness of 2 mm can sequentially withstand various deformations such as bending

knotting

and twisting

and can lift a 1 kg weight without any damage. Besides the electrostatic interactions between sulfonate groups of SPVA and protonated amine groups of LPEI

Fourier transform infrared spectroscopy confirms the existence of hydrogen-bonding interactions between hydroxyl and sulfonate groups on SPVA. The synergy of strong electrostatic interactions and weak hydrogen-bonding interactions endows the hydrogels with high mechanical strength and toughness. Moreover

the hydrogels can completely recover from a strain of 200% to their original shape and mechanical properties within 1 h rest at room temperature without any external assistance. The excellent self-recovery of the LPEI

/18%-SPVA

hydrogels originates from the high elastic retraction of polymer chains arising from electrostatic interactions and the reversibility of sacrificial hydrogen-bonding interactions. The high mechanical strength and excellent self-recovery will make the hydrogels have potential applications in aspects such as load-bearing materials

actuators and stretchable electronics.

关键词

水凝胶聚电解质聚电解质复合物自恢复性能

Keywords

HydrogelsPolyelectrolytesPolyelectrolyte complexesSelf-recovery

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