纺织学报 ›› 2021, Vol. 42 ›› Issue (05): 38-45.doi: 10.13475/j.fzxb.20200804308

• 纤维材料 • 上一篇    下一篇

基于静电纺丝的柔性各向异性应变传感器的制备及其性能

张林1, 李至诚1, 郑钦元1, 董隽2, 章寅3,4()   

  1. 1.东南大学 吴健雄学院, 江苏 南京 211189
    2.南京医科大学附属儿童医院 泌尿外科, 江苏 南京 210008
    3.东南大学 机械工程学院, 江苏 南京 211189
    4.东南大学 江苏省微纳生物医疗器械设计与制造重点实验室, 江苏 南京 211189
  • 收稿日期:2020-08-10 修回日期:2021-01-15 出版日期:2021-05-15 发布日期:2021-05-20
  • 通讯作者: 章寅
  • 作者简介:张林(1999—),男。主要研究方向为纳米纤维膜基柔性传感器。
  • 基金资助:
    江苏省自然科学基金项目(BK20180400);江苏省微纳生物医疗器械设计与制造重点实验室自主研究课题资助项目(ZD202104)

Preparation and performance of flexible and anisotropic strain sensor based on electrospinning

ZHANG Lin1, LI Zhicheng1, ZHENG Qinyuan1, DONG Jun2, ZHANG Yin3,4()   

  1. 1. Chien-Shiung WU College, Southeast University, Nanjing, Jiangsu 211189, China
    2. Department of Urology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, China
    3. School of Mechanical Engineering, Southeast University, Nanjing, Jiangsu 211189, China
    4. Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, Jiangsu 211189, China
  • Received:2020-08-10 Revised:2021-01-15 Online:2021-05-15 Published:2021-05-20
  • Contact: ZHANG Yin

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摘要：

为实现特定方向应变的检测,拓展柔性应变传感器的适用范围,利用磁场辅助静电纺丝技术制备平行排布的聚偏氟乙烯(PVDF)纳米纤维薄膜,并组装成各向异性柔性压电传感器。探究了纺丝参数对纤维薄膜形貌的影响,借助拉曼光谱仪对其化学结构进行表征;对传感器的应变响应性进行测试,并验证其应用于输尿管蠕动检测的可行性。结果表明:纺丝电压为11.5 kV,纺丝距离为13 cm,推注速率为5 mL/h条件下制备的PVDF纳米纤维具有均一的形貌和取向性,且纳米纤维膜为β晶型结构;柔性各向异性应变传感器对于沿PVDF纳米纤维垂直方向的应变,能够产生显著的电压响应信号,而对沿PVDF纳米纤维平行方向的应变不敏感,显示出良好的各向异性应变检测能力。

关键词: 聚偏氟乙烯, 柔性传感器, 静电纺丝, 各向异性, 纳米纤维, 输尿管蠕动检测

Abstract:

In order to detect the strain in a specific direction, aligned polyvinylidene fluoride (PVDF) nanofiber mats were fabricated via magnetic electrospinning and packaged in soft materials to prepare flexible and anisotropic strain sensors. The effects of electrospinning parameters on the morphology of nanofibers were studied. Raman spectroscopy was used to characterize the crystal form in PVDF nanofibers. The performances of flexible strain sensors and the feasibility of applying the sensor in monitoring ureteral peristalsis were tested. The experimental results show that PVDF nanofibers fabricated by an 11.5 kV voltage under 10 cm eletrospinning distance and 5 mL/h injection rate present uniform morphology and best alignment. The β phase is in the predominant crystal form in the PVDF nanofiber. Bending test shows that the sensor generates an obvious response signal for the bending perpendicular to the PVDF nanofiber, while the sensor is insensitive for the bending in parallel to the PVDF nanofiber. The work shows that the sensor performs good anisotropic detection sensitivity to strain.

Key words: polyvinylidene fluoride, flexible sensor, electrospinning, anisotropy, nanofiber, detection of ureteral peristalsis

中图分类号: 

  • TQ340.64

图1

静电纺丝示意图"

图2

柔性传感器结构示意图与实物图"

图3

杂乱和平行分布的PVDF纳米纤维 (×1 000)"

图4

不同纺丝电压制备的纳米纤维光学显微镜照片(×1 000)"

图5

不同纺丝距离制备的纳米纤维光学显微镜照片(×1 000)"

图6

不同推注速度制备的纳米纤维光学显微镜照片(×1 000)"

图7

传统柔性传感器应变响应测试结果"

图8

柔性各向异性传感器应变响应测试"

图9

输尿管蠕动检测系统示意图与集成柔性传感器的肾造瘘管实物图"

图10

集成柔性传感器的肾造瘘管性能检测"

图11

PVDF粉末、杂乱PVDF纤维和平行PVDF纤维的拉曼光谱图"

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