聚乳酸非织造基材触摸传感电子织物制备及其性能  

Preparation and properties of polyactic acid nonwoven substrate touch-sensing electronic textile

作　　者：徐瑞东 王航 曲丽君[1,2] 田明伟[1,2] XU Ruidong;WANG Hang;QU Lijun;TIAN Mingwei(College of Textiles and Clothing,Qingdao University,Qingdao,Shandong266071,China;State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University,Qingdao,Shandong266071,China)

机构地区：[1]青岛大学纺织服装学院,山东青岛266071 [2]青岛大学省部共建生物多糖纤维成形与生态纺织国家重点实验室,山东青岛266071

出　　处：《纺织学报》2023年第9期161-167,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(22208178);国家重点研发计划项目(2022YFB3805801,2022YFB3805802);泰山学者工程专项经费项目(tsqn202211116);山东省重大科技创新工程项目(2019JZZY010335,2019JZZY010340);山东省青创科技创新团队项目(2020KJA013);山东省自然科学基金项目(ZR2020QE074);青岛市关键技术攻关及产业化示范类项目(23-1-7-zdfn-2-hz);青岛市市南区科技计划项目(2022-3-005-DZ);纺织行业智能纺织服装柔性器件重点实验室开放课题项目(SDHY2223)。

摘　　要：针对现有薄膜状、硅胶基触摸传感器件抗弯折性差、热湿舒适性不佳等问题,提出了采用柔软亲肤的聚乳酸非织造材料为基材构筑柔性触摸传感电子织物的研究策略,构建聚丙烯酰胺-氯化锂离子水凝胶双向离子导电体系,采用芯吸沉积效应制备石墨烯导电非织造织物,复合形成层叠结构电子织物,研究触摸传感电子织物对触摸动作的识别及不同机械形变对触摸信号的影响规律。结果表明:触摸传感电子织物可定位识别触摸动作;响应时间仅为25 ms,表现出优异的响应速度;在不同速度触摸下,触摸信号波动率仅为5%,表现出优异的稳定性。弯曲循环500次后,触摸传感电子织物的触摸性能仍维持恒定,表现出优异的抗干扰性。此外,触摸传感电子织物具有优异的热湿舒适性,可长期穿戴。基于此,触摸传感电子织物可实现显示界面的控制功能,在可穿戴人机交互领域具有广阔的发展潜力。Objective Touch-sensing devices are the most promising technology for human-computer interaction.However,current touch-sensing devices still suffer from poor bending resistance and low comfort due to the use thin films or silicone as substrate.Herein,this work proposes a novel strategy to breakthrough above bottleneck.PLA nonwoven materials with skin-friendly is used as substrate and combined w ith intrinsically flexible ionic hydrogels to develop a touch-sensing electronic textile with wearable comfort and resistance to deformation interference.Method The touch-sensing electronic textile is a typical sandwich structure,where the ionic hydrogel is encapsulated by the upper and lower polylactic acid nonwoven layers.The ionic hydrogel is polymerized by acrylamide and lithium chloride under a thermal environment.It is noteworthy that the upper PLA nonwoven layer possesses conductive properties,which is a result of the uniform deposition of graphene nanosheet layers on the PLA fiber surface using the core-absorption deposition effect.The touch-sensing electronic textile has precise touch localization capability,which stems from the construction of a uniform low-voltage AC electric field on the surface of the touch-sensing electronic textile.When the human body touches the surface of the electronic fabric,a coupling capacitance is formed,which trigger the flow of current from the electrodes to the touch point.Owing to the surface capacitive sensing mechanism and the selected intrinsically flexible material,the touch-sensing electronic textile is resistant to bending and comfortable to wear.Results The results show that the touch-sensing electronic textile can recognize the locations of touch points,and an example test was designed for illustration.Five points were selected at equal intervals on the fabric named 1#—5#,respectively.When the points 1#—5#were touched on,the touch current monitored by the A1 ammeter showed a decreasing tendency(from 8.08μA to 7.61μA),while the A2 touch current demonstrated an increas

关 键 词：离子水凝胶 石墨烯 导电非织造布 柔性电子织物 触摸传感 

分 类 号：TM242[一般工业技术—材料科学与工程] TS17[电气工程—电工理论与新技术]