摘要
为探究预拉伸处理对聚吡咯弹性导电长丝导电及传感性能的影响,通过在吡咯聚合时对弹性长丝进行不同程度的预拉伸处理,得到具有不同增重率的聚吡咯涂层,通过扫描电镜观察其微观形貌,并进行电学及传感性能的测试分析。研究结果表明电阻会随着预伸长率增加(>70%)而降低,在预伸长率为10%时聚吡咯层较为光滑,但具有最好的应变传感性能:在0~2 cN范围内灵敏度高,可达7.68/N,超过2 cN后灵敏度降低并稳定在1/N左右。稳定性、重复性实验及手指弯曲测试都表明,预拉伸10%处理的导电长丝具有良好的灵敏度和传感稳定性,电阻变化率分别为24.71%和11.01%,因此,具有此结构的聚吡咯复合弹性丝有望应用于人体运动和生理信号的检测中。预伸长率较高的弹性导电纱表面具有褶皱结构,随着拉伸具有稳定的电阻值,可用于导线和电极中。
In order to explore the effect of pre-stretching treatment on the conductivity and sensing properties of polypyrrole elastic conductive filaments,polypyrrole-coated fibers with different weight gain ratios were obtained by pre-stretching the elastic filaments to different degrees during pyrrole polymerization.Its microscopic morphology was observed by scanning electron microscopy,and the electrical and sensing performances were tested and analyzed.The research results show that the resistance decreases with the increase of pre-stretch ratio(>70%).At 10%pre-stretch ratio,the polypyrrole layer is smoother,but has the best strain sensing performance:in the range of 0~2 cN,the internal sensitivity is high up to 7.68/N,and the sensitivity decreases and stabilizes at about 1/N after exceeding 2 cN.Both the repeatability experiment and the finger bending test show that the conductive filament pre-stretched by 10%has good sensitivity and sensing stability,and the resistance change rates are 24.71%and 11.01%,respectively.Therefore,the polypyrrole composite elastic filament with this structure is expected to be used in the detection of human motion and physiological signals.The elastic conductive yarns with higher pre-stretch ratios have a wrinkled structure on the surface,so they have the stable resistance value as stretched,which can be used in wires and electrodes.
作者
赵未源
柴嘉后
汤伟业
王飒飒
李铀
陈莹
ZHAO Wei-yuan;CHAI Jia-hou;TANG Wei-ye;WANG Sa-sa;LI You;CHEN Ying(School of Material Design and Engineering,Beijing Institute of Fashion Technology,Beijing 100029,China)
出处
《高分子通报》
CAS
CSCD
北大核心
2023年第10期1330-1336,共7页
Polymer Bulletin
基金
2022年大学生创新创业训练计划项目
北京服装学院科学研究项目(2020A-09)。
关键词
预拉伸
聚吡咯
导电性
传感性
手指运动检测
Pre-stretching
Polypyrrole
Conductivity
Sensing property
Finger motion detection
