高强度银纳米线/聚丙烯酰胺复合水凝胶的制备及导电性能研究

丁晶晶; 剧芳; 刘春华; 唐龙祥; 朱元元

doi:10.11777/j.issn1000-3304.2022.22034

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高强度银纳米线/聚丙烯酰胺复合水凝胶的制备及导电性能研究

研究论文 | 更新时间：2024-10-08

- 高强度银纳米线/聚丙烯酰胺复合水凝胶的制备及导电性能研究
- High Strength AgNWs/PAm Composite Hydrogels: Synthesis and Conductivity Study
- 高分子学报 2022年53卷第8期页码：942-951
- 作者机构：
  
  合肥工业大学化学与化工学院先进催化与反应工程安徽省重点实验室合肥 230009
- 作者简介：
  
  E-mail: lchh88@hfut.edu.cn;
  yyzhu@hfut.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号21771049);中央高校基本科研基金(基金号PA2020GDJQ0028;PA2021GDSK0063)
- DOI：10.11777/j.issn1000-3304.2022.22034
  中图分类号：
- 纸质出版日期：2022-08-20，
  
  网络出版日期：2022-06-17，
  
  收稿日期：2022-02-03，
  
  录用日期：2022-03-14
- 稿件说明：
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丁晶晶,剧芳,刘春华等.高强度银纳米线/聚丙烯酰胺复合水凝胶的制备及导电性能研究[J].高分子学报,2022,53(08):942-951.

Ding Jing-jing,Ju Fang,Liu Chun-hua,et al.High Strength AgNWs/PAm Composite Hydrogels: Synthesis and Conductivity Study[J].ACTA POLYMERICA SINICA,2022,53(08):942-951.
丁晶晶,剧芳,刘春华等.高强度银纳米线/聚丙烯酰胺复合水凝胶的制备及导电性能研究[J].高分子学报,2022,53(08):942-951. DOI： 10.11777/j.issn1000-3304.2022.22034.

Ding Jing-jing,Ju Fang,Liu Chun-hua,et al.High Strength AgNWs/PAm Composite Hydrogels: Synthesis and Conductivity Study[J].ACTA POLYMERICA SINICA,2022,53(08):942-951. DOI： 10.11777/j.issn1000-3304.2022.22034.

摘要

近年来，导电水凝胶作为一种功能聚合物软材料在柔性电子器件领域显示出广泛的应用前景，因此发展高强度导电水凝胶的合成方法在基础和应用研究中均具有重要的价值. 本文提出了一种制备高强度导电水凝胶的简便方法，利用银-硫配位作用实现一维银纳米线(AgNWs)与含硫有机聚合物的有效复合，在提高水凝胶强度的同时，赋予其高的导电性. 具体制备步骤如下：首先通过1-烯丙氧基-2

3-环硫丙烷的开环聚合得到侧基带乙烯基的线性聚硫醚(

)，通过巯-烯click反应引入足够量的羧基，赋予其水溶性. 修饰后的线性聚硫醚(

)与一维AgNWs通过银-硫配位作用制备复合交联剂(AgNWs@

). 该交联剂与丙烯酰胺(Am)单体以过硫酸钾(KPS)为引发剂，在水溶液中进行自由基聚合制备银纳米线/聚丙烯酰胺复合水凝胶(AgNWs/PAm composite hydrogel

AC gel). 高分辨场发射扫描电子显微镜的测试证实，AgNWs与

在水凝胶中实现了纳米尺寸上的复合. 刚性AgNWs的引入赋予水凝胶优异的力学强度，其拉伸应变和断裂强度可达到~4500%和~2.2 MPa. 该水凝胶具有高导电性(

=0.44 S/m)，且在拉伸过程中，电阻变化与水凝胶的形变线性相关，具有很好的循环稳定性. 该水凝胶材料表现出的稳定电阻响应能力为新一代柔性电子器件的发展提供了材料基础.

Abstract

Conductive hydrogels

as a kind of functional polymeric soft material

have been demonstrated a wide application prospect in the field of flexible electronics devices in recent years. Therefore

it is of great value to develop a synthesis method for conductive hydrogels with high strength in both fundamental and applied research. In this work

we present a facile method for preparing high-strength hydrogels

in which one-dimensional silver nanowires (AgNWs) are effectively composited with sulfur-containing organic polymers

via

Ag-S coordination

significantly improving the strength of hydrogel

and also imposing high conductivity. The details for this hydrogel are as follows: First

linear polythioether (

) with side vinyl groups is obtained by ring-opening polymerization of 1-allyloxy-2

3-sulfopropane

and subsequently a sufficient amount of carboxyl groups are introduced through thiol-ene click reaction to endow its solubility in water. The modified linear polythioether (

) interacts with AgNWs to afford composited cross-linking agent (AgNWs@

) through Ag-S coordination. The cross-linking agent and acrylamide (Am) monomer were polymerized in water using potassium persulfate (KPS) as the free radical initiator to prepare silver nanowire/polyacrylamide composite hydrogels (AgNWs/PAms

AC gels). The images of high-resolution field emission scanning electron microscope confirm the effective composition of AgNWs and

in nanoscale. The introduction of rigid AgNWs provides hydrogel with excellent mechanical strength and the largest elongation and maximum fracture stress strength can reach ~4500% and ~2.2 MPa

respectively. In additio

this hydrogel has high conductivity of 0.44 S/m. During the stretching process

the change of electrical resistance is linearly related to the deformation of the hydrogel

and especially this process has good cyclic stability. The stable resistance response capability of AC gel provides a promising application in the field of flexible electronics devices.

关键词

水凝胶银硫配位纳米复合导电

Keywords

HydrogelsAg-S coordinationNanocompositeConductivity

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