摘要
可穿戴传感器凭借其优异的适形性、穿戴舒适度以及实时信息传输能力,在能源、航空航天、医疗等领域发挥着重要作用。由于需要贴附于检测对象表面,因此可穿戴传感器需要具有优异的柔性以抵抗变形引起的信号不稳定。当前多数可穿戴传感器使用的传感材料或基底柔性较差,变形时材料容易脱落,从而影响着传感器的稳定性。本研究采用聚氧化乙烯(Polyethylene oxide,PEO)作为柔性黏合剂将碳纳米管和石墨烯结合构建复合墨水,不仅具有优异的导电性,还具有优异的柔性。当PEO质量分数为5.5%时,复合墨水表现出最优的特性。此外,对制备的导电单元进行180℃、30 min的热处理后,可显著提升导电性能。同时,选用多孔纳米纤维膜作为基底,使导电墨水能够充分渗入纤维内部,实现墨水与基底的牢固结合,有效防止材料脱落。制备的柔性导电线路能够成功点亮LED灯,且经过1000次循环弯曲测试,电阻值仍能保持稳定(RSD=3.25%),表明所制备的柔性电子电路具有优异的机械稳定性。
Wearable sensors play a pivotal role in energy,aerospace,and biomedical applications owing to their exceptional conformability,wearer comfort,and real-time data transmission capabilities.As these devices must intimately conform to target surfaces,they require superior mechanical flexibility to mitigate signal instability induced by deformation.Conventional wearable sensors often employ rigid sensing materials or substrates that exhibit inadequate interfacial adhesion,leading to material delamination during deformation and compromised operational stability.To address these limitations,we engineered a composite conductive ink by integrating carbon nanotubes and graphene with polyethylene oxide(PEO)as a flexible polymeric binder.This formulation achieves not only enhanced electrical conductivity but also remarkable mechanical compliance.The composite ink demonstrated optimal properties at a PEO concentration of 5.5 wt%.Furthermore,post-annealing treatment at 180°C for 30 minutes significantly improved the electrical performance of the conductive units.Concurrently,a porous nanofiber membrane substrate was employed to enable deep ink penetration into the fibrous network,establishing mechanically interlocked interfaces that effectively prevent material delamination.The fabricated flexible conductive circuits successfully illuminated an LED device and maintained exceptional electrical stability during rigorous mechanical testing.After 1000 bending cycles,the resistance variation remained within 3.25%relative standard deviation(RSD),confirming outstanding mechanical durability of the flexible electronics.
作者
王欢
张瑶
范乐
刘晓莎
张小洁
WANG Huan;ZHANG Yao;FAN Le;LIU Xiaosha;ZHANG Xiaojie(Shaanxi Polytechnic University,Xianyang 712000,Shaanxi China;Shaanxi Universities and Colleges Youth Innovation Team,Xianyang 712000,Shaanxi China)
出处
《河南科学》
2025年第12期1733-1739,共7页
Henan Science
基金
陕西工业职业技术大学科研基金资助项目(2024YKYB-003)
咸阳市渭城区智能微电网与制氢用氢一体化技术研究与应用平台(2024VCCCN-005)
咸阳市重点研发计划(L2025-ZDYF-QN-001)。
