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高韧性和自修复的壳聚糖-聚丙烯酸-MXene导电水凝胶及其压力传感性能

李泽宇 邓夏玲 韩威 谢祖坤 蔡少君 彭湘红

李泽宇, 邓夏玲, 韩威, 等. 高韧性和自修复的壳聚糖-聚丙烯酸-MXene导电水凝胶及其压力传感性能[J]. 复合材料学报, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005
引用本文: 李泽宇, 邓夏玲, 韩威, 等. 高韧性和自修复的壳聚糖-聚丙烯酸-MXene导电水凝胶及其压力传感性能[J]. 复合材料学报, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005
LI Zeyu, DENG Xialing, HAN Wei, et al. High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005
Citation: LI Zeyu, DENG Xialing, HAN Wei, et al. High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005

高韧性和自修复的壳聚糖-聚丙烯酸-MXene导电水凝胶及其压力传感性能

doi: 10.13801/j.cnki.fhclxb.20231031.005
基金项目: 国家自然科学基金(52103213);江汉大学项目(2021yb019)
详细信息
    通讯作者:

    蔡少君,博士,副教授,硕士生导师,研究方向为智能水凝胶 E-mail: shaojuncai@163.com

    彭湘红,博士,教授,硕士生导师,研究方向为光电功能生物材料 E-mail: pxh@jhun.edu.cn

  • 中图分类号: O636.9;TB332

High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors

Funds: National Natural Science Foundation of China (52103213); Plan of Jianghan University (2021yb019)
  • 摘要: 壳聚糖基导电水凝胶在电子皮肤、健康监测和柔性穿戴电子等领域得到广泛关注。本文将MXene分散到丙烯酸-壳聚糖水溶液中,丙烯酸原位聚合成聚丙烯酸,制备了壳聚糖-聚丙烯酸-MXene导电水凝胶(CS-PAA-MXene)。CS-PAA-MXene具有优异的力学性能,其断裂应变为1450%,断裂应力为0.6 MPa,韧性达到2.6 MJ·m−3。CS-PAA-MXene能够粘附于多种物体表面,包括玻璃、塑料、橡胶、铜片和铝片等,其中对玻璃的最大剥离力可达到175 N·m−1;CS-PAA-MXene具有优异的自修复性能,切断的CS-PAA-MXene相互接触2.5 s后,其电阻恢复到切断前数值。CS-PAA-MXene应变传感器被成功用于检测人体各类活动,如手指、手肘和膝盖等关节弯曲活动。基于壳聚糖的阳离子电荷及其抗菌特性,CS-PAA-MXene将在自粘附和高延展的柔性传感器具有良好的应用前景。

     

  • 图  1  (a) 壳聚糖-聚丙烯酸-MXene水凝胶(CS-PAA-MXene)的制备过程和网络结构示意图;(b) CS-PAA-MXene水凝胶的氢键相互作用示意图

    Figure  1.  (a) Schematic preparation process and network structure of chitosan-poly(acrylic acid)-MXene hydrogels (CS-PAA-MXene); (b) Schematic of hydrogen bond interaction of CS-PAA-MXene hydrogel

    KPS—Potassium persulfate; AAc—Acrylic acid; Gly—Glycerol; MBA—N, N'-methylene diacrylamide

    图  2  CS、CS-PAA、CS-PAA-MXene水凝胶的FTIR图谱(a);CS-PAA-MXene水凝胶的C1s (b)和 Ti2p (c)的XPS图谱

    Figure  2.  FTIR spectra of CS, CS-PAA and CS-PAA-MXene hydrogel (a); High-resolution XPS spectra of C1s (b) and Ti2p (c) region of CS-PAA-MXene hydrogel

    图  3  水凝胶的SEM图像:(a) CS-PAA表面;(b) CS-PAA截面;(c) CS-PAA-MXene表面;(d) CS-PAA-MXene截面

    Figure  3.  SEM images of hydrogels: (a) CS-PAA surface; (b) CS-PAA section; (c) CS-PAA-MXene surface; (d) CS-PAA-MXene section

    图  4  (a) CS-PAA和CS-PAA-MXene水凝胶的应力-应变曲线;(b) CS-PAA和CS-PAA-MXene水凝胶的弹性模量与韧性;(c) CS-PAA-MXene水凝胶及其扭转和拉伸的照片;(d) 本工作与类似水凝胶材料的韧性和断裂应力对比图[33-37]

    Figure  4.  (a) Tensile stress-strain curves of the CS-PAA and CS-PAA-MXene hydrogels; (b) Elastic modulus and toughness of the CS-PAA and CS-PAA-MXene hydrogels; (c) Photos of CS-PAA-MXene hydrogel and its torsion and stretching; (d) Comparison diagram of toughness and fracture stress of this work and similar hydrogel materials[33-37]

    PAN—Polyacrylonitrile; SA—Sodium alginate

    图  5  (a) CS-PAA-MXene水凝胶粘附于玻璃、塑料、橡胶、铝片、铜片、木材的照片;(b) 粘附性能测试示意图;(c) CS-PAA-MXene水凝胶对不同物体的粘附性能

    Figure  5.  (a) Photos of CS-PAA-MXene hydrogel adhering to glass, plastic, rubber, aluminum sheet, copper sheet and wood; (b) Schematic diagram of adhesion performance test; (c) Adhesion performance of CS-PAA-MXene hydrogel in different substrates

    图  6  (a) 实时测量CS-PAA-MXene水凝胶在切割愈合过程中的电阻恢复周期;(b) CS-PAA-MXene水凝胶切割后的自修复行为(LED在水凝胶切割-修复后亮度变化)

    Figure  6.  (a) Resistance recovery of the CS-PAA-MXene hydrogel during the cutting-healing cycle; (b) Self-healing behavior of the CS-PAA-MXene hydrogel after cutting (Brightness change of LED under the cutting healing process)

    图  7  CS-PAA-MXene水凝胶对人体运动传感:(a) 灵敏度(GF)值;(b) 手指弯曲;(c) 手肘弯曲;(d) 膝盖弯曲

    Figure  7.  Human motion sensing of CS-PAA-MXene hydrogel: (a) Sensitivity (GF) value; (b) Finger bending; (c) Elbow bending; (d) Knee bending

    ΔR/R0—Change ratio of resistance

    表  1  不同MXene浓度的样品名称

    Table  1.   Sample names for different MXene concentrations

    Sample Concentration of MXene in glycerol
    aqueous solution/(mg·mL−1)
    CS-PAA 0
    CS-PAA-MXene1 1
    CS-PAA-MXene5 5
    CS-PAA-MXene10 10
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-07-25
  • 修回日期:  2023-09-15
  • 录用日期:  2023-10-10
  • 网络出版日期:  2023-11-01
  • 刊出日期:  2024-04-15

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