光学精密工程2026，Vol.34Issue(4)：611-623,13.DOI:10.37188/OPE.20263404.0611
抗溶胀壳聚糖基复合薄膜实现湿度传感器高灵敏快响应
Anti-swelling chitosan-based composite films for high-sensitivity and fast-response of humidity sensors
摘要
Abstract
Chitosan,as a bio-based material,combines environmental friendliness with excellent moisture adsorption capacity.However,its inherent high-humidity swelling characteristics often lead to issues such as,slow response and low long-term reliability in humidity sensors.To address these problems,a humidi-ty sensor based on chitosan-molybdenum disulfide composite material was proposed in this study,aiming to achieve high sensitivity and fast response.By incorporating two-dimensional molybdenum disulfide nanosheets into the chitosan matrix,a chitosan-MoS₂ composite humidity-sensitive film with a cross-linked network was constructed.Characterization and performance test results show that molybdenum disulfide nanosheets not only form a cross-linked network with chitosan through hydrogen bonding,but also con-struct a physical barrier layer,which effectively suppresses the swelling of the material under high humidi-ty conditions,and enhances the water molecule adsorption capacity and interfacial polarization effect of the film.The prepared chitosan-MoS2 sensor exhibits a wide operating humidity range(7%RH-95%RH),high sensitivity(14 200 pF/%RH),short response/recovery time(15/25 s),good repeatability(5 rela-tive standard deviation 2.08%over 5 cycles)and long-time stability(no attenuation over 120 h).Further-more,the sensor demonstrates potential application value in respiratory pattern recognition and non-con-tact human-computer interaction.This study provides an effective design and fabrication strategy for the development of high-performance and stable humidity sensors.关键词
湿度传感器/壳聚糖-二硫化钼/抗溶胀/高灵敏度/快速响应Key words
humidity sensor/chitosan-molybdenum disulfide/anti-swelling/high sensitivity/quick re-sponse分类
信息技术与安全科学引用本文复制引用
王宇扬,杜贤若,叶志俊,郑高峰,崔景芹,颜黄苹..抗溶胀壳聚糖基复合薄膜实现湿度传感器高灵敏快响应[J].光学精密工程,2026,34(4):611-623,13.基金项目
国家重点研发计划(No.2023YFB3210200) （No.2023YFB3210200）
福建省科技计划引导性项目(No.2024H0002) （No.2024H0002）
CAD/CAM福建省高校工程研究中心开放基金项目资助(No.K202502) （No.K202502）
现代精密测量与激光无损检测福建省高校重点实验室开放基金项目资助(No.XKA202402) （No.XKA202402）
