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纳米纤维素-碳纳米管/热塑性聚氨酯复合薄膜的制备及应变响应性能

欧华杰 陈港 朱朋辉 魏渊 李方

欧华杰, 陈港, 朱朋辉, 等. 纳米纤维素-碳纳米管/热塑性聚氨酯复合薄膜的制备及应变响应性能[J]. 复合材料学报, 2020, 37(11): 1-9 doi:  10.13801/j.cnki.fhclxb.20200306.003
引用本文: 欧华杰, 陈港, 朱朋辉, 等. 纳米纤维素-碳纳米管/热塑性聚氨酯复合薄膜的制备及应变响应性能[J]. 复合材料学报, 2020, 37(11): 1-9 doi:  10.13801/j.cnki.fhclxb.20200306.003
Huajie OU, Gang CHEN, Penghui ZHU, Yuan WEI, Fang LI. Preparation and strain sensitive performance of cellulose nanofiber-carbon nanotubes/ thermoplastic polyurethane composite films[J]. Acta Materiae Compositae Sinica. doi: 10.13801/j.cnki.fhclxb.20200306.003
Citation: Huajie OU, Gang CHEN, Penghui ZHU, Yuan WEI, Fang LI. Preparation and strain sensitive performance of cellulose nanofiber-carbon nanotubes/ thermoplastic polyurethane composite films[J]. Acta Materiae Compositae Sinica. doi: 10.13801/j.cnki.fhclxb.20200306.003

纳米纤维素-碳纳米管/热塑性聚氨酯复合薄膜的制备及应变响应性能

doi: 10.13801/j.cnki.fhclxb.20200306.003
基金项目: 国家重点研发计划项目(2018YFC1902102);国家工业和信息化部重点行业绿色制造系统集成项目(Z135060009002);制浆造纸工程国家重点实验室团队项目(2017ZD01)
详细信息
    通讯作者:

    陈港,博士,教授,研究方向为造纸技术与特种纸 E-mail:papercg@scut.edu.cn

  • 中图分类号: TB332

Preparation and strain sensitive performance of cellulose nanofiber-carbon nanotubes/ thermoplastic polyurethane composite films

  • 摘要: 采用2,2,6,6-四甲基哌啶-1-氧自由基(TEMPO)氧化法制备了不同羧基含量的纳米纤维素(CNF),并将其用作碳纳米管(CNTs)的分散剂,通过超声、离心处理制备出稳定均一的CNF-CNTs分散液,然后通过朗伯-比尔定律测定CNF-CNTs分散液中CNTs的浓度,研究了不同CNF羧基含量对CNTs的分散效果。此外,利用静电纺丝法制备出柔性、多孔的热塑性聚氨酯(TPU)薄膜作为基体,以CNF-CNTs分散液作为导电填料,通过真空抽滤法将CNF-CNTs负载于TPU多孔膜上,制备出CNF-CNTs/TPU复合薄膜,并探究了不同CNF羧基含量对CNF-CNTs/TPU复合薄膜应变响应性能的影响规律。结果表明,羧基含量对CNF的分散性能具有重要影响。随着CNF羧基含量的提高,CNF对CNTs分散效果越好,CNF-CNTs/TPU复合薄膜具有更大的应变响应范围。当CNF羧基含量为1.698 mmol/g时,CNF-CNTs/TPU复合薄膜的应变响应范围高达507%,灵敏度系数为335,表现出优异的应变响应性能。
  • 图  1  纳米纤维素-碳纳米管/热塑性聚氨酯(CNF-CNTs/TPU)复合薄膜的制备示意图

    Figure  1.  Schematic diagram of preparation of cellulose nanofiber-carbon nanotubes/thermoplastic polyurethane(CNF-CNTs/TPU) composite film

    DMF—N,N-dimethylformamide

    图  2  CNF-CNTs/TPU复合薄膜的光学照片(插图为卷曲状态)

    Figure  2.  Optical photograph of CNF-CNTs/TPU composite film (Inset is bending state)

    图  3  不同羧基含量的CNF分散液的光学照片

    Figure  3.  Optical photograph of CNF dispersions with different carboxyl contents

    图  4  不同CNF羧基含量的CNF-CNTs分散液的紫外-可见吸收光图谱

    Figure  4.  UV-Vis absorption spectra of CNF-CNTs dispersion with different carboxyl content of CNF

    图  5  静电纺丝TPU多孔膜(a)和CNF-CNTs/TPU复合薄膜预拉伸前(b)、横截面(c)、预拉伸后(d)的SEM图像

    Figure  5.  SEM images of electrospun TPU porous film(a) and before pre-stretching(b), cross section(c) and after pre-stretching(d) of CNF-CNTs/TPU composite film

    图  6  不同应变下CNF-CNTs/TPU复合薄膜电阻相对变化曲线

    Figure  6.  Relative change of resistance curves of CNF-CNTs/TPU composite films under different strain

    图  7  CNF-CNTs/TPU复合薄膜拉伸至400%时的光学照片

    Figure  7.  Optical photographs of CNF-CNTs/TPU composite films under strain of 400%((a) CNF-CNTs/TPU1, (b) CNF-CNTs/TPU2, (c) CNF-CNTs/TPU3, (d) CNF-CNTs/TPU4)

    8  CNF-CNTs/TPU复合薄膜拉伸-释放后的SEM图像

    8.  SEM images of CNF-CNTs/TPU composite films ((a) CNF-CNTs/TPU1, (b) CNF-CNTs/TPU2, (c) CNF-CNTs/TPU3, (d) CNF-CNTs/TPU4, (e) CNF-CNTs/TPU4’s crack, (f) Magnification of CNF-CNTs/TPU4’s crack)

    表  1  不同CNF羧基含量的CNF-CNTs/TPU复合薄膜的编号及成分

    Table  1.   Serial numbers and component details of CNF-CNTs/TPU composite films with different carboxyl content of CNF

    No.Carboxyl content of CNF/(mmol·g−1)CNF/
    wt%
    CNTs/
    wt%
    TPU/
    wt%
    CNF-CNTs/TPU1 0.663 2.4 1.2 96.4
    CNF-CNTs/TPU2 0.947 2.4 1.2 96.4
    CNF-CNTs/TPU3 1.348 2.4 1.2 96.4
    CNF-CNTs/TPU4 1.698 2.4 1.2 96.4
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  • 收稿日期:  2019-12-04
  • 录用日期:  2020-01-06
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