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木基柔性电子复合膜的制备及其在传感器中的应用

王怡仁 周彤 王露臻 吴启静 李大纲 金永灿 陈楚楚

王怡仁, 周彤, 王露臻, 等. 木基柔性电子复合膜的制备及其在传感器中的应用[J]. 复合材料学报, 2022, 39(8): 4057-4064. doi: 10.13801/j.cnki.fhclxb.20211027.001
引用本文: 王怡仁, 周彤, 王露臻, 等. 木基柔性电子复合膜的制备及其在传感器中的应用[J]. 复合材料学报, 2022, 39(8): 4057-4064. doi: 10.13801/j.cnki.fhclxb.20211027.001
WANG Yiren, ZHOU Tong, WANG Luzhen, et al. Preparation of flexible wood-based electronic films and its application for sensors[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 4057-4064. doi: 10.13801/j.cnki.fhclxb.20211027.001
Citation: WANG Yiren, ZHOU Tong, WANG Luzhen, et al. Preparation of flexible wood-based electronic films and its application for sensors[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 4057-4064. doi: 10.13801/j.cnki.fhclxb.20211027.001

木基柔性电子复合膜的制备及其在传感器中的应用

doi: 10.13801/j.cnki.fhclxb.20211027.001
基金项目: 国家自然科学基金(31901254);江苏省研究生科研与实践创新计划项目(KYCX21_0873);第14批中国博士后科学基金(2021T140329);中国博士后科学基金面上项目(2020M671506);江苏省博士后科研资助计划(2020Z027)
详细信息
    通讯作者:

    陈楚楚,博士,副教授,硕士生导师,研究方向为纤维素、甲壳素、复合材料 E-mail:chuchu_chen@njfu.edu.cn

  • 中图分类号: TB332

Preparation of flexible wood-based electronic films and its application for sensors

  • 摘要: 为拓展木材多功能化及高值化应用,以轻木为原料,通过脱基质工艺去除木材基质,随后干燥处理获得轻木骨架(WF),进一步乙酰化改性后干燥可制得乙酰化轻木骨架(AWF)。利用浸渍法,将聚二甲基硅氧烷(PDMS)弹性体分别引入WF与AWF制备木基复合薄膜材料(PDMS/WF与PDMS/AWF)。系统性研究乙酰化改性对复合膜形貌特征、力学性能、化学组分及表面亲水性等的影响。结果表明,乙酰化处理能够有效促进PDMS分布于轻木骨架的孔隙结构中,二者结合紧密,界面结合性提高。同时,制得的PDMS/AWF木基复合膜具备较好的柔韧性,沿纤维生长方向断裂拉伸强度达176 MPa,韧性约6.58 MJ/m3,几乎是PDMS/WF复合膜的两倍。进一步将该PDMS/AWF木基复合膜作为柔性基材,组装柔性传感器件,在多种形变下表现出稳定及可重复的相对电阻值变化。预期在智能家居、软体机器人及柔性可穿戴电子等智能响应器件研究领域具有潜在的应用。

     

  • 图  1  聚二甲基硅氧烷/乙酰化轻木骨架(PDMS/AWF)复合膜制备流程示意图

    Figure  1.  Preparation process of polydimethylsiloxane/acetylated balsa wood frame (PDMS/AWF) composite film

    WF—Balsa wood frame

    图  2  PDMS及木基复合膜试样表面微观形貌:(a) PDMS;(b) 轻木;(c) WF;(d) AWF;(e) PDMS/WF;(f) PDMS/AWF

    Figure  2.  Surface morphologies of PDMS and wood composite film samples: (a) PDMS; (b) Balsa wood; (c) WF; (d) AWF; (e) PDMS/WF; (f) PDMS/AWF

    图  3  木基复合膜试样断面微观形貌:((a), (b)) PDMS/WF;((c), (d)) PDMS/AWF

    Figure  3.  Fracture surface of wood composite film samples: ((a), (b)) PDMS/WF; ((c), (d)) PDMS/AWF

    图  4  WF、PDMS/WF及PDMS/AWF复合膜沿纤维生长方向(L-direction)拉伸应力-应变曲线

    Figure  4.  Tensile stress-strain curves of WF, PDMS/WF and PDMS/AWF composite films along longitudinal direction (L-direction)

    图  5  PDMS/WF及PDMS/AWF复合膜垂直于纤维生长方向(T-direction)的拉伸应力-应变曲线

    Figure  5.  Tensile stress-strain curves of PDMS/WF and PDMS/AWF composite films along perpendicular to the longitudinal direction (T-direction)

    图  6  PDMS、WF、AWF、PDMS/WF及PDMS/AWF复合膜的FTIR图谱

    Figure  6.  FTIR spectra of PDMS, WF, AWF, PDMS/WF andPDMS/AWF composite film

    图  7  PDMS/WF复合膜 (a) 及PDMS/AWF复合膜 (b) 水接触角测试

    Figure  7.  Water contact angle of PDMS/WF (a) and PDMS/AWF (b) film

    图  8  PDMS/AWF木基复合膜样品折叠(a)、打结(b)和组装柔性传感器(c)

    Figure  8.  PDMS/AWF composite film upon folding (a), knotting (b) and assembling into flexible sensors (c)

    图  9  木基柔性传感器弯曲折叠 (a)、点击 (b) 及书写 (c) 过程中的相对电阻(ΔR/R0)变化

    Figure  9.  Relative resistance (ΔR/R0) changes of flexible sensor upon repeated bending (a), clicking (b) and writing (c)

    表  1  WF膜、PDMS/WF复合膜及PDMS/AWF复合膜纤维生长方向拉伸应力-应变数值及PDMS在复合膜中质量分数

    Table  1.   Tensile stress-strain values of WF, PDMS/WF and PDMS/AWF film along L-direction and the mass fraction of PDMS

    SamplePDMS/wt%Fracture strength/MPaYoung’s modulus/GPaFracture strain/%Toughness
    /(MJ·m−3)
    WF0213.26±3.5812.44±0.052.93±0.214.23±0.03
    PDMS/WF53.39±0.65164.58±12.6511.46±0.103.25±0.353.41±0.11
    PDMS/AWF35.33±2.98176.48±9.898.99±0.035.71±0.436.58±0.08
    下载: 导出CSV
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  • 收稿日期:  2021-08-02
  • 修回日期:  2021-10-16
  • 录用日期:  2021-10-18
  • 网络出版日期:  2021-10-27
  • 刊出日期:  2022-08-31

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