中国塑料 ›› 2022, Vol. 36 ›› Issue (6): 16-23.DOI: 10.19491/j.issn.1001-9278.2022.06.004

• 材料与性能 • 上一篇    下一篇

羧基化填料对聚乙烯醇/纳米纤维素水凝胶力学、导电和传感性能的影响

刘伟1, 吴显1, 陈小澄1, 成晓琼2, 张纯1()   

  1. 1.贵州理工学院,材料与能源工程学院,贵阳 550003
    2.贵州师范大学,材料与建筑工程学院,贵阳 550028
  • 收稿日期:2022-01-03 出版日期:2022-06-26 发布日期:2022-06-27
  • 通讯作者: 张纯,主要从事聚合物结构与性能的研究,zhangchun925@126.com
    E-mail:zhangchun925@126.com
  • 基金资助:
    贵州省自然科学基金资助项目(黔科合基础?ZK[2022]一般179);贵州省科研机构服务企业行动计划(黔科服企[2018]4010号);贵州理工学院博士启动经费(XJGC20190657)

Effect of carboxylate fillers on mechanical, conductive, and sensing performance of PVA/CNF hydrogel

LIU Wei1, WU Xian1, CHEN Xiaocheng1, CHENG Xiaoqiong2, ZHANG Chun1()   

  1. 1.School of Materials and Energy Engineering,Guizhou Institute of Technology,Guiyang 550003,China
    2.School of Materials and Construction,Guizhou Norm University,Guiyang 550028,China
  • Received:2022-01-03 Online:2022-06-26 Published:2022-06-27
  • Contact: ZHANG Chun E-mail:zhangchun925@126.com

摘要:

利用羧基化碳纳米管(CNT)和纳米纤维素微晶(CNC)与聚乙烯醇/纳米纤维素(PVA/CNF)中形成氢键构建致密的交联网络,并对水凝胶进行增强改性。结果表明,加入3 %(质量分数,下同)的CNT可以使水凝胶的拉伸强度由50 kPa提高至120 kPa,而加入3 %的CNC能够同时提高水凝胶的拉伸强度和断裂伸长率;加入CNT后能够在水凝胶中构建导电逾渗网络,结合溶剂中的离子导电使得水凝胶的电阻率显著下降;使用PVA/CNF?CNT3水凝胶制作应变传感器,能够实现拉伸、压缩和弯曲等多种应变的快速、准确传感响应。

关键词: 聚乙烯醇, 水凝胶, 传感器, 离子导电, 高强度

Abstract:

In this work, carboxylate carbon nanotubes (CNTs) and cellulose nanocrystals (CNC) were used to induce a dense crosslinking structure and act as reinforcement agents in poly(vinyl alcohol) (PVA)/cellulose nanofibers composite hydrogels. The results indicated that the tensile strength of the composite hydrogels increased from 50 kPa to 120 kPa with the addition of 3 wt % CNTs, whereas, their tensile strength and elongation at break both increased with the addition of 3 wt % CNC. Meanwhile, the electrical resistance of the composite hydrogels decreased significantly in the presence of CNT due to the formation of a conductive percolation threshold and ionic conductive paths. Therefore, the composite hydrogel with 3 wt % CNT can be selected as a sensing material. The hydrogels designed in this study exhibit a rapid and accurate sensing response to various stresses in tension, compression and bending.

Key words: poly(vinyl alcohol), hydrogel, sensor, ironic conductive, high strength

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