化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (3) : 168-172. DOI: 10.19817/j.cnki.issn1006-3536.2022.03.034

科学研究

基于喷墨打印技术的织物基湿度传感器研究

^1,2

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作者信息 +

Research on fabric-based humidity sensor based on inkjet printing technology

Guo Hua^1,2, Zhou Yihong², Song Jinya², Yue Wangfeng²

Author information +

文章历史 +

Received
2021-05-16
Issue Date	Revised Date
2022-03-29	2021-05-16

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摘要

用聚(4-乙烯吡啶)(P4VP)与光刻胶SU-8混合液浸涂织物,在120℃的烘箱中处理20min进行交联反应,制得织物基底,采用喷墨打印技术将0.5g/mL的AgNO₃溶液在织物表面打印出线宽0.5mm、间隙宽度0.5mm的叉指电极图案,Ag⁺作为活化剂启动化学镀铜,在织物表面沉积形成铜层电极,将0.06g/mL PVA和0.03g/mL KOH混合制得PVA/KOH湿敏聚合物,并涂布在铜叉指电极上形成PVA/KOH湿敏聚合物薄膜,在100℃温度下干燥20min得到湿度传感器。利用扫描电镜对叉指电极的镀铜形貌进行表征,用四探针测试仪测量铜镀层的方阻仅为176mΩ/□,用柔性测试系统对样品的耐弯性、附着稳定性进行研究,利用计时安培法测试了湿度传感器的电化学性能。结果表明:P4VP/SU-8改性、AgNO₃催化镀铜可以提高织物基镀铜层的导电性和附着力,从而使涂布PVA/KOH湿敏层聚合物制得的湿度传感器具有耐弯性、稳定性和高灵敏性。

Abstract

The cross-finger electrode pattern made of AgNO₃ printed on the surface of the fabric was coated with the mixture of P4VP and SU-8 photoresist,processed in the oven at 120℃ for 20minutes for crosslinking reaction,and the fabric substrate was prepared.Ink-jet printing technology was used to print the cross-finger electrode pattern with line width of 0.5mm and gap width of 0.5mm on the fabric surface with 0.5g/mL AgNO₃ solution.Ag⁺ was used as an activator to initiate electroless copper plating.A copper layer electrode was deposited on the surface of the fabric.PVA/KOH moisture-sensitive polymer was prepared by mixing 0.06g/mL PVA and 0.03g/mL KOH,and PVA/KOH moisture-sensitive polymer film was formed by coating on copper cross finger electrode.The humidity sensor was obtained by drying at 100℃ for 20minutes.Scanning electron microscopy(SEM) was used to describe the morphology of copper plating on the cross-finger electrode.The square resistance of the copper coating was only 176mΩ/□ measured by a four-probe tester.The flexure resistance and adhesion stability of the sample were studied by a flexible test system.The results shown that the P4VP/SU-8 modification and AgNO₃ catalytic copper plating can improve the electrical conductivity and adhesion of the copper plating layer on the fabric,so that the humidity sensor prepared by coating PVA/KOH moisture sensitive layer polymer had the characteristics of bending resistance,stability,and high sensitivity.

关键词

湿度传感器 / 喷墨打印 / 化学镀铜 / 柔性电子 / 织物基传感器

Key words

humidity sensor / inkjet printing / electroless copper / flexible electronics / fabric-based sensor

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基于喷墨打印技术的织物基湿度传感器研究[J]. 化工新型材料, 2022, 50(3): 168-172 DOI:10.19817/j.cnki.issn1006-3536.2022.03.034

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基金资助

国家自然科学基金(61433016)

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