碳纳米管修饰三维纤维网非织造布传感器的制备及其性能  

Preparation and properties of carbon nanotube modified three-dimensional fiber-mesh nonwoven sensors

作　　者：张蕊 应迪 陈冰冰 田欣 郑莹莹 王建 邹专勇[1,2] ZHANG Rui;YING Di;CHEN Bingbing;TIAN Xin;ZHENG Yingying;WANG Jian;ZOU Zhuanyong(Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province,Shaoxing University,Shaoxing,Zhejiang 312000,China;Shaoxing Key Laboratory of High Performance Fibers&Products,Shaoxing University,Shaoxing,Zhejiang 312000,China)

机构地区：[1]绍兴文理学院浙江省清洁染整技术研究重点实验室,浙江绍兴312000 [2]绍兴文理学院绍兴市高性能纤维及制品重点实验室,浙江绍兴312000

出　　处：《纺织学报》2024年第11期46-54,共9页Journal of Textile Research

基　　金：浙江省大学生科技创新活动计划(新苗人才计划)项目(2023R465032);国家级大学生创新创业训练计划项目(202310349047);浙江省教育厅一般科研项目(Y202351466)。

摘　　要：为改善柔性可穿戴压力传感器在使用时灵敏度低、耐久性差、柔韧舒适性不足等问题,提出了一种基于预针刺-热加固技术制备的三维聚乙烯/聚丙烯热熔纤维与涤纶非织造布为基材的高灵敏、较耐磨的压阻传感器。使用扫描电子显微镜、数显推拉力计和数字万用表等仪器表征了碳纳米管修饰三维纤维网非织造布前后的微观形貌、力电学性能和传感性能。结果表明:柔性纺织传感器在低压力范围(0~0.17 kPa)内的灵敏度高达0.91 kPa^(-1);能在73 ms内实现对压力的快速响应;具有0~166 kPa较宽的感测范围,在超过2000次施压循环后仍然保持较稳定的相对电阻变化,表现出较优异的耐久性。此外,该传感器可应用于信息加密,监测人体微弱活动(眨眼、吞咽)和大形变运动(关节活动等)。在健康监测、人机交互、语音识别和手写字识别等领域具有广阔的应用前景。Objective Flexible sensors,as core components of flexible smart wearable devices,have a promising future in many fields.However,a common problem is that lower sensitivity and poor durability affect the performance of flexible sensors.In order to improve the problems of low sensitivity,poor durability,and lack of flexibility and comfort in the use of flexible wearable pressure sensors,a highly sensitive and more wear-resistant piezoresistive sensor based on a three-dimensional(3-D)fiber mesh nonwovens prepared from polyethylene/polypropylene hot-melt fibers with polyester fibers was proposed.Method Firstly,three-dimensional fiber mesh nonwovens were prepared by blending polyethylene/polypropylene hot-melt fibers with polyester fibers,which were pre-strengthened and heated to shape.Then,using piezoresistive sensing as its basic principle,carbon nanotube/nonwoven(CNN)sensors were prepared by immersing 3-D fiber mesh nonwovens into CNT suspension for surface treatment through ultrasonic-assisted modification and impregnation-drying method.Scanning electron microscopy,DM6500 series digital multimeter,and homemade tensile tester were used to characterise and analyse the CNT-modified CNN sensors.Results Nonwovens with four different hot-melt fiber proportions(5%,10%,20%and 25%by mass),denoted as CNN 5,CNN 10,CNN 20 and CNN 25,were prepared,and four different proportions of CNT-modified nonwovens sensors were compared for sensitivity and sensing performance.The results showed that the sensitivity would decrease with increasing hot-melt fiber proportion and pressure,attributing to the increase in fiber density leading to higher compression modulus.The polyester hot-melt nonwoven fabric with a base of CNN 5 has the highest sensitivity up to 0.91 kPa^(-1) in the range of 0-0.17 kPa,3.5×10^(-3) kPa^(-1) in the range of 0.17-53.65 kPa and 4.8×10^(-4) kPa^(-1) in the range of 53.65-166 kPa.Sensing performance studies of the CNN sensors showed that the sensor exhibited a stable dynamic signal response when pressure was contin

关 键 词：聚乙烯/聚丙烯热熔纤维 三维纤维网非织造布 碳纳米管 压阻式传感器 传感性能 健康监测 

分 类 号：TS106[轻工技术与工程—纺织工程]