光栅结构对智能凝胶光栅传感器检测性能的影响规律  

Effects of grating structures on detection performances of smart hydrogel grating sensors

作　　者：赖俊华 潘大伟 巨晓洁[1,2] 刘壮[1,2] 谢锐 汪伟[1,2] 褚良银 LAI Junhua;PAN Dawei;JU Xiaojie;LIU Zhuang;XIE Rui;WANG Wei;CHU Liangyin(School of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学高分子材料工程国家重点实验室,四川成都610065

出　　处：《化工进展》2025年第3期1578-1587,共10页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21991101)。

摘　　要：深入研究光栅几何结构参数对智能凝胶光栅传感器检测性能的定量影响规律是实现其结构优化设计的重要前提。本文设计了一种由N-异丙基丙烯酰胺(NIPAM)单体与大分子交联剂四臂聚乙二醇丙烯酰胺(tetra-arm-PEGAAm)聚合而成的温度响应型智能凝胶光栅传感器,并采用微接触印刷法制备了3种不同槽深的凝胶光栅,由此研究光栅结构对检测性能的影响规律。研究结果表明,制备得到的凝胶光栅在干态和湿态下其表面微观结构均表现出高度的规整和有序性,且其具有高透明度,并能实现实时可逆响应。此外,在相同的温度刺激下,PNIPAM凝胶光栅的高度越大,衍射信号越强,呈现出更显著的衍射效率变化和信号放大效应。相关研究结果可为智能凝胶光栅传感器的结构优化设计提供理论指导。A thorough investigation on the quantitative impacts of grating geometric parameters on the detection performance of smart hydrogel grating sensors is an essential prerequisite for rationally designing their geometric structures.In this study,the N-isopropylacrylamide(NIPAM)monomers and tetra-arm polyethylene glycol acrylamide(tetra-arm-PEGAAm)regarded as large-molecule crosslinking agent were used to synthetize temperature-responsive smart hydrogel grating sensor,and three various heights of hydrogel gratings were fabricated by microcontact printing to explore their influences on the detection performances.The results indicated that,the fabricated hydrogel gratings exhibited highly regular and ordered surface microstructures under both dry and wet conditions,and always possessing with high transparency and real-time reversible response properties.Besides,as the height of hydrogel grating increased,the diffraction signals of smart hydrogel grating sensors could be obviously enhanced under the same temperature stimulus,thus exhibiting more pronounced changes in diffraction efficiency and signal amplification.These findings in this study provided valuable guidance for the rational design of the geometric structures of smart hydrogel grating sensors.

关 键 词：智能凝胶 光栅结构 温度响应 体积相变 智能检测 

分 类 号：TQ317[化学工程—高聚物工业]