可控交联PVA导电水凝胶织物柔性传感器的制备与性能  

Preparation and properties of controllable crosslinked PVA conductive hydrogel fabric flexible sensor

作　　者：黎顺洋 诸葛承耀 吕汪洋[1] 李楠[1] LI Shunyang;ZHUGE Chengyao;LÜWangyang;LI Nan(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018

出　　处：《现代纺织技术》2024年第11期35-45,共11页Advanced Textile Technology

基　　金：国家自然科学基金项目(51703201)。

摘　　要：为了制备交联程度可控的导电水凝胶,以聚乙烯醇(PVA)为原料,添加羟丙基纤维(HPC)来控制水凝胶的交联度,制备了羟丙基纤维-聚乙烯醇(HPC-PVA)导电水凝胶溶液。将水凝胶溶液涂覆在涤氨织物上,通过循环冷冻-解冻法制得羟丙基纤维素-聚乙烯醇(HPC-PVA)导电水凝胶织物。对导电水凝胶织物的形貌、组成、机械性能、抗冻性、热稳定性及传感性能进行分析。结果表明,当HPC质量分数为2%、PVA质量分数为10%时,HPC-PVA导电水凝胶织物具有良好的力学强度(断裂强度为16.77 MPa)、优异的抗冻性、较好的导电率(1.48 S/m),对人体运动以及面部微表情变化具有较好的灵敏度。In recent years,the demand for flexible sensors has been increasing.Among them,conductive hydrogel flexible sensors have attracted wide attention due to their excellent flexibility,biocompatibility and conductivity.Conductive hydrogels can be prepared by physical crosslinking,chemical crosslinking and radiation crosslinking.The crosslinking degree of conductive hydrogels directly affects their electrical conductivity and mechanical strength.However,the control of crosslnking degree of conductive hydrogels prepared by physical cross-linking is usually difficult.In order to control it,we chose to add hydroxypropyl cellulose(HPC)to reduce the crosslinking degree of polyvinyl alcohol(PVA)hydrogels.In addition,the traditional conductive hydrogel is hard to meet the high conductivity and high mechanical strength at the same time.Therefore,in order to address the issue of poor mechanical properties of traditional conductive hydrogels,we coated conductive hydrogels directly onto fabrics to produce conductive hydrogel fabrics.With good elasticity,high mechanical strength,good air permeability,and comfortable softness,knitted fabrics,particularly,can fit the human body well and are excellent substrates for preparing conductive hydrogel fabrics.Meanwhile,the introduced HPC can be used as a nano-filler to toughen and improve the mechanical strength of the conductive hydrogel.In this paper,HPC was introduced into the PVA hydrogel,and a hydrogel with controllable crosslinking degree was prepared by cyclic freezing-thawing method,and it was coated on polyester/spandex fabric(90%polyester&10%spandex).Sodium chloride(NaCl)was used as a conductive material to endow the hydrogel with electrical conductivity.Water(H 2O)and ethylene glycol(EG)were used as solvents to make the prepared hydrogel have frost resistance.The introduction of polyester ammonia fabrics and HPC together enhanced the strength of the hydrogel.Analysis of scanning electron microscope images,Fourier transform infrared spectroscopy,mechanical properties,frost resis

关 键 词：羟丙基纤维素 聚乙烯醇水凝胶 交联 柔性传感器 

分 类 号：TB332[一般工业技术—材料科学与工程]