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纳米银/纳米纤维素复合抗菌应变响应性水凝胶

王钦雯 王雯君 陈玟锦 唐爱民

王钦雯, 王雯君, 陈玟锦, 等. 纳米银/纳米纤维素复合抗菌应变响应性水凝胶[J]. 复合材料学报, 2023, 42(0): 1-11.
引用本文: 王钦雯, 王雯君, 陈玟锦, 等. 纳米银/纳米纤维素复合抗菌应变响应性水凝胶[J]. 复合材料学报, 2023, 42(0): 1-11.
WANG Qinwen, WANG Wenjun, CHEN Wenjin, et al. Silver nanoparticle/nanocellulose composites antibacterial strain-responsive hydrogels[J]. Acta Materiae Compositae Sinica.
Citation: WANG Qinwen, WANG Wenjun, CHEN Wenjin, et al. Silver nanoparticle/nanocellulose composites antibacterial strain-responsive hydrogels[J]. Acta Materiae Compositae Sinica.

纳米银/纳米纤维素复合抗菌应变响应性水凝胶

基金项目: 国家自然科学基金 (51875214)
详细信息
    通讯作者:

    王钦雯,博士,副教授,硕士生导师,研究方向为纸张及其他承印材料的印刷适性、适用于喷墨印刷的纳米纤维素油墨及环保型印刷油墨的开发及应用 E-mail: qwwang@scut.edu.cn

  • 中图分类号: TB332

Silver nanoparticle/nanocellulose composites antibacterial strain-responsive hydrogels

Funds: National Natural Science Foundation of China (No.51875214).
  • 摘要: 基于纳米银颗粒(AgNPs)的抗菌导电水凝胶在可穿戴设备、电子皮肤、生物传感器等领域有重要应用,其绿色制造是目前的研究热点之一。纳米纤维素(CNF)因其独特的物理化学性质,在智能水凝胶的制备与应用中得到越来越多的关注。将 AgNPs 与 CNF 复合并应用到水凝胶中,有望制备具有良好机械性能的抗菌水凝胶,对水凝胶在智能可穿戴领域中的应用具有重要的指导意义。本研究首先以羧基改性的纳米纤维素(TOCNF)为复合基材,硝酸银(AgNO3)为银源,通过水热法原位复合制备纳米银/纳米纤维素复合材料(Ag-CNF)。随后,将 Ag-CNF 和 单宁酸(TA) 作为功能性添加剂引入聚丙烯酰胺(PAM)水凝胶中,制备了具有良好拉伸性能、粘附性、抗菌性和紫外屏蔽性的 Ag-CNF/PAM 水凝胶(AP 水凝胶),并将 AP 水凝胶封装制备成应变响应传感设备,研究其电学和传感性能。AP 水凝胶在 100% 的应变循环下能够保持稳定重复的电信号输出,也能够用于手腕动作和头部动作的动作检测,在应变响应传感领域具有良好的应用前景。

     

  • 图  1  AgNO3、羧基改性的纳米纤维素(TOCNF)、AgNO3-TOCNF和 Ag-CNF 的 UV-vis 吸收光谱

    Figure  1.  Absorption spectra of AgNO3 solution, TEMPO-oxidized nanocellulose (TOCNF), AgNO3-TOCNF and Ag-CNF

    图  2  TOCNF(a)和 Ag-CNF(b)的 AFM 图像以及 TOCNF 长度统计(c)和 AgNPs 的粒径统计(d)

    Figure  2.  AFM images of TOCNF (a) and Ag-CNF (b), the length statistic of TOCNF (c) and the particle size statistics of AgNPs(d)

    图  3  聚丙烯酰胺(PAM)和 AP (Ag-CNF/PAM)水凝胶的制备示意图

    Figure  3.  Schematic representation of the preparation of polyacrylamide (PAM) and AP (Ag-CNF/PAM) hydrogels

    图  4  AP 水凝胶(a)扭转(b)、打结(c)以及承重(d)的实物图

    Figure  4.  Real picture of AP hydrogel (a) twisting (b), knotting (c), and bearing (d)

    图  5  TOCNF,AM、TA、PAM 和 AP 水凝胶红外谱图

    Figure  5.  FTIR spectrums of TOCNF, AM, TA, PAM and AP hydrogels

    图  6  AP 水凝胶的表面(a, b)和横截面(c, d)的 SEM 图片

    Figure  6.  SEM images of surface (a, b) and cross-sections (c, d) of AP hydrogels

    图  7  AP 水凝胶对不同基材的粘附图片

    Figure  7.  Images of AP hydrogel adhesion to different substrates

    图  8  不同 AM 含量和 TA 含量的 AP 水凝胶对纸张的粘附剪切应力对比

    Figure  8.  Comparison of adhesive shear stress of AP hydrogels with different AM and TA contents on paper

    图  9  AP 水凝胶对不同基底的重复粘附测试

    Figure  9.  Repeated adhesion test of AP hydrogel to different substrates

    图  10  不同 单宁酸(TA) 含量的 AP 水凝胶的应力-应变曲线(a)和对应的性能参数(b)

    Figure  10.  Stress-strain curves (a) and corresponding performance parameters (b) of AP hydrogels with different tannic acid (TA) contents

    图  11  AP 水凝胶对大肠杆菌和金黄色葡萄球菌的接触抗菌效果

    Figure  11.  Contact antibacterial effect of AP hydrogels on E. coli and S. aureus

    图  12  PAM 和 AP 水凝胶的 UV-vis 透射率光谱

    Figure  12.  The UV-vis transparent spectrum of PAM and AP hydrogels

    图  13  基于 AP 水凝胶的应变响应传感器在不同应变(0-500%)下(a, b)的相对电阻变化;应变响应传感器的应变系数(c)

    Figure  13.  Changes in the relative resistance of AP hydrogel-based strain-responsive sensors at different strains (0-500%) (a, b); gauge factor of the strain-response sensors (c)

    图  14  基于 AP 水凝胶的应变响应传感器在 100%应变循环加载-卸载过程中的相对电阻变化

    Figure  14.  Changes in relative resistance of AP hydrogel-based strain-responsive sensors during 100% strain cyclic loading-unloading

    图  15  基于 AP 水凝胶的应变响应传感器在手指动作检测中(a, b)的相对电阻变化

    Figure  15.  Changes in relative resistance of AP hydrogel-based strain-responsive sensors during finger-action detection (a, b).

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出版历程
  • 收稿日期:  2023-11-14
  • 修回日期:  2023-12-11
  • 录用日期:  2023-12-18
  • 网络出版日期:  2024-01-02

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