基于纤维素膜的聚乙烯醇基抗溶胀水凝胶柔性传感材料的制备及性能研究  

Preparation and Performance Study of Polyvinyl Alcohol-based Anti-swelling Hydrogel Flexible Sensing Material Based on Cellulose Membrane

作　　者：黄有诚 史珺[1,2,4] 孔晨光 王杭州 江淑敏 杨立 HUANG Youcheng;SHI Jun;KONG Chenguang;WANG Hangzhou;JIANG Shumin;YANG Li(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC(Nanxiong)Research Institute of Advanced Materials Co.,Ltd.,Nanxiong 512400,China;Nanxiong Science and Technology Development Service Center,Shaoguang 512499,China)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院大学,北京100049 [3]中国科学院新型特种精细化学品工程实验室,广东广州510650 [4]国科广化(南雄)新材料研究院有限公司,广东南雄512440 [5]南雄市科学技术开发服务中心,广东韶关512499

出　　处：《纤维素科学与技术》2024年第3期13-19,I0001,共8页Journal of Cellulose Science and Technology

基　　金：梅州市科技计划项目-梅州鸿雁计划(2024HY001TD003);广东省科技专项资金-韶关科技计划项目(210906134536798)。

摘　　要：目前,基于水凝胶的柔性可穿戴传感器受到了人们广泛的关注。然而传统的水凝胶在水环境中的膨胀,限制了其应用。文中以聚乙烯醇(PVA)为基体,通过缩醛反应将4-乙炔基苯甲醛引入网络中,成功地制备了具有良好力学性能的抗溶胀水凝胶。该水凝胶通过破坏PVA分子链与水分子之间的氢键,降低溶胀的驱动力,π-π堆积增强链间相互作用减小孔隙度,抵抗水分子的渗透,使得溶胀率维持在5%。同时网络交联密度增加,改善了分子链间的间距,赋予水凝胶更高的韧性(断裂应力=1.4 MPa,断裂伸长率=528%)。考虑到生物相容性以及水环境的应用,使用无毒纤维素膜与水凝胶构建出一种用于人体动作监测的柔性应变传感器,拓展了可穿戴电子设备的潜在应用。In recent years,hydrogel-based flexible wearable sensors have received widespread attention.However,swelling of hydrogels in an aquatic environment dramatically limits their application.Herein,an anti-swelling hydrogel with good mechanical properties is successfully fabricated by introducing 4-ethynylbenzaldehyde into the network through acetal reaction with polyvinyl alcohol as the matrix.The hydrogel reduces the driving force of swelling by destroying the hydrogen bond between the PVA chains and the water molecules.Theπ-πstacking enhances the interaction between the chains to reduce the porosity and resist the penetration of water molecules,so that the swelling rate is maintained at 5%.Meanwhile,the crosslinking density of the network increases,which improves the fusion between the molecular chains and gives the hydrogel higher toughness(the tensile strength=1.4 MPa,elongation at break=528%).Considering the application of biocompatibility and water environment,the hydrogel is combined with a non-toxic cellulose film to assemble a flexible sensor for human motion detection,which expands the potential application of wearable electronic devices.

关 键 词：聚乙烯醇 水凝胶 抗溶胀 纤维素膜 传感材料 

分 类 号：TQ427.26[化学工程] TP212[自动化与计算机技术—检测技术与自动化装置]