高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (8): 2609.doi: 10.7503/cjcu20210191

• 高分子化学 • 上一篇    下一篇

Hofmeister效应辅助的蛋白质基水凝胶应变传感器

蔡雅倩, 张家怀, 刘方哲, 李海潮, 石建平, 关爽()   

  1. 长春工业大学化学与生命科学学院, 材料科学高级研究所高分子与软材料实验室, 长春 130021
  • 收稿日期:2021-03-19 出版日期:2021-08-10 发布日期:2021-08-05
  • 通讯作者: 关爽 E-mail:guanshuang@ccut.edu.cn
  • 基金资助:
    吉林省教育厅科学研究项目(JJKH20210714KJ)

Protein-based Hydrogel Assisted by Hofmeister Effect for Strain Sensor

CAI Yaqian, ZHANG Jiahuai, LIU Fangzhe, LI Haichao, SHI Jianping, GUAN Shuang()   

  1. Polymeric and Soft Materials Laboratory,Advanced Institute of Materials Science,School of Chemistry and Life Science Changchun University of Technology,Changchun 130021,China
  • Received:2021-03-19 Online:2021-08-10 Published:2021-08-05
  • Contact: GUAN Shuang E-mail:guanshuang@ccut.edu.cn
  • Supported by:
    the Scientific Research Project of Education Department of Jilin Province, China(JJKH20210714KJ)

摘要:

以酪蛋白酸钠和明胶为原料, 通过简单的在硫酸铵溶液中浸泡的方法, 借助Hofmeister效应制备了一种强韧导电的酪蛋白酸钠/明胶水凝胶, 克服了蛋白质基水凝胶柔软、 易碎的问题. 测试结果表明, 该水凝胶具有优异的机械性能, 最大拉伸应力为3.55 MPa, 最大拉伸应变为1375%; 水凝胶的最大电导率为0.0954 S/cm, 导电灵敏因子为0.53. 用该水凝胶制备的传感器对不同大小及不同速率的应变均具有分辨能力, 能够监测人体不同部位的运动, 且传感器的信号传输具有稳定性和准确性, 表明该水凝胶是监测人体健康和运动的理想材料. 该水凝胶还具有良好的形状记忆性能. 这一策略为制备全天然蛋白质基水凝胶开辟了新的思路, 扩展了水凝胶在生物医学和电子传感等相关领域的应用前景.

关键词: 水凝胶, 明胶, 酪蛋白酸钠, Hofmeister效应, 应变传感器

Abstract:

Natural protein-based hydrogels have been widely studied in recent years because of their good biocompatibility. However, the preparation of natural protein-based hydrogels with excellent toughness and electrical conductivity remains a challenging problem. Using sodium caseinate and gelatin as raw materials, a kind of natural protein-based hydrogel was prepared through Hofmeister effect by soaking in ammonium sulfate solution. The soaking method overcomed the weakness of soft and fragile protein-based hydrogel. The test results showed that the hydrogel had excellent mechanical properties. The maximum tensile stress of hydrogel was 3.55 MPa, and the maximum tensile strain was 1375 %. The maximum conductivity of the hydrogel was 0.0954 S/cm, and the conductivity sensitivity factor was 0.53. The hydrogel sensor had distinguishing ability for different strains, and can monitor the movement of different parts of human body. The hyderogel sensor showed accuracy and stability in the signal transmission process, which makes the hydrogel an ideal material for monitoring human health and movement. In addition, the hydrogel showed good shape-memory performance. This strategy opens up a new field of vision for the preparation of strong conductive hydrogels, and expands the application prospect of hydrogels in biomedical and electronic sensing fields.

Key words: Hydrogel, Gelatin, Sodium casein, Hofmeister effect, Strain sensor

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