智能调湿水凝胶材料的设计及其在微环境湿度调控方面的应用  

Research on the Design of Intelligent Humidification Hydrogel and Its Application in Microenvironment Humidity Control

作　　者：吉笑盈 蔡沁玥 吴迪 王艺珊 李晓鹏 刘娟 贾玉红 杨振 张倩颖 赵丽娟[2] 王义 JI Xiaoying;CAI Qinyue;WU Di;WANG Yishan;LI Xiaopeng;LIU Juan;JIA Yuhong;YANG Zhen;ZHANG Qianying;ZHAO Lijuan;WANG Yi(China Tobacco Sichuan Industrial Co.,Ltd.,Cigar Fermentation Technology Key Laboratory of China Tobacco,Chengdu 610066,China;School of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China)

机构地区：[1]四川中烟工业有限责任公司烟草行业雪茄发酵工艺重点实验室,四川成都610066 [2]四川师范大学化学与材料科学学院,四川成都610066

出　　处：《塑料工业》2023年第12期70-76,95,共8页China Plastics Industry

基　　金：烟草行业雪茄发酵工艺重点实验室开放基金资助项目(项目编号:20202302BC530);四川中烟工业有限责任公司科研项目(项目编号:cl202103)。

摘　　要：微环境的湿度调控对于维持材料的结构性能具有十分重要的意义,然而目前关于微环境湿度调控的研究很少。针对此,本论文通过分子结构设计,制备了一种可智能调湿的水凝胶材料,将其用于微环境的湿度调控。首先通过“一锅法”混合丙烯酰胺(AM)、丙酮缩甘油(Sol)和氯化锂(LiCl)制备PAM-Sol-LiCl水凝胶。PAM-Sol-LiCl拥有良好的三维立体网络结构,为水凝胶中水分的吸收和释放提供了良好的通道。该水凝胶拥有良好的透光性(透光率高达90%),可满足使用者的观察需求。相对于传统的PAM水凝胶,PAM-Sol-LiCl有更好的力学性能,拉伸强度可达0.24 MPa,压缩强度可达1.2 MPa。三维立体网络间的动态物理相互作用(静电相互作用、氢键作用)使PAM-Sol-LiCl具有良好的保水性,8 d质量保留率仍为85%(30℃,65%RH)。进一步探究了水凝胶对微环境的调湿效果,在高湿度条件下(90%RH)水凝胶通过吸收水分使微环境湿度在78%RH平衡,在低湿度条件下(40%RH)通过释放水分使微环境湿度在66%RH左右平衡,表明PAM-Sol-LiCl可智能调节微环境湿度。这项研究为微环境湿度的调控提供了一种新的策略。The humidity control of the microenvironment was of great significance for maintaining the structure and properties of materials,but there was currently little research on humidity control in the microenvironment.To solve this problem,a kind of hydrogel material was prepared with intelligent humidity control properties through molecular structure design,and it was used for humidity control of the microenvironment.Firstly,polyacrylamide-solketal-lithium chloride(PAM-Sol-LiCl)hydrogel was prepared by mixing acrylamide(AM),solketal(Sol)and lithium chloride(LiCl)via “one pot”method.The PAM-Sol-LiCl hydrogel had a three-dimensional network structure,which provided a good channel for the absorption and release of water in the hydrogel.Meanwhile,the hydrogel possessed a good light transmittance(up to 90%),which could meet the observation needs for users.Comparing with pure PAM hydrogel,the PAM-Sol-LiCl hydrogel displays better mechanical properties,with tensile strength up to 0.24 MPa and compressive strength up to 1.2 MPa.Moreover,the dynamic physical interactions between three-dimensional networks,including the electrostatic interactions,hydrogen bonding interactions,impart the PAM-Sol-LiCl hydrogel with good water retention.The 8-day mass retention rate is still 85%under the condition of 30 ℃ and 65% RH.The humidity regulation effect of hydrogel on microenvironment is further explored.Under a high humidity condition(90%RH),the hydrogel balances the microenvironment humidity at 78%RH by absorbing water.Under a low humidity condition(40%RH),the hydrogel balances the microenvironment humidity at 65%RH by releasing water.The above results indicate that the PAM-Sol-LiCl hydrogel can intelligently regulate the microenvironment humidity.This study provides a new strategy for regulating the humidity of the microenvironment.

关 键 词：调湿性能 水凝胶 丙酮缩甘油 氯化锂 

分 类 号：TQ326[化学工程—合成树脂塑料工业]