PVA-AgNWs@PVA水凝胶纤维制备及传感性能研究  

Preparation and sensing properties of PVA-AgNWs@PVA hydrogel fibers

作　　者：楼恒屹 万军民[1] LOU Hengyi;WAN Junmin(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2024年第6期735-742,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(52173274);浙江省自然科学基金项目(LY13B030009)。

摘　　要：为解决传统纤维基传感器功能单一与应变范围窄的缺点,以聚乙烯醇(PVA)为水凝胶基材、银纳米线为芯层填料、温敏粉末为皮层填料,采用同轴湿法纺丝技术制备PVA-AgNWs@PVA水凝胶初生纤维,将初生纤维置于4mol/L氯化钠溶液中浸泡72h制得PVA-AgNWs@PVA水凝胶传感纤维;对PVA-AgNWs@PVA水凝胶纤维的温度和拉伸传感性能进行测定。结果表明:PVA-AgNWs@PVA水凝胶纤维在环境温度小于17℃时呈深蓝色,18~27℃时呈蓝灰色,28~35℃时呈淡红色,大于36℃时呈灰白色;该水凝胶纤维断裂伸长率为374%,拉伸强度为3.65MPa,电导率为5.12S/m,应变灵敏度为3.57,在高频次运动状态下相对电阻变化一致。该文制备的PVA-AgNWs@PVA水凝胶纤维具有优异的温度和拉伸传感性能,在柔性可穿戴设备领域具有潜在的应用价值。To solve the shortcomings of traditional fiber-based sensors with single function and narrow strain range,PVA-AgNWs@PVA hydrogel fibers were prepared by coaxial wet spinning with polyvinyl alcohol(PVA)as the hydrogel substrate,silver nanowires(AgNWs)as the core filler and temperaturesensitive powder as the skin filler,and then the fibers were preserved in a 4mol/L NaCl solution for 72 hours to improve the performance of the fibers;and the temperature and tensile sensing properties of the PVA-AgNWs@PVA hydrogel fibers were measured.The results show that the PVA-AgNWs@PVA hydrogel fibers were dark blue when the ambient temperature was less than 17℃,blue-gray when it was in the range of 18℃to 27℃,light red when it was in the range of 28℃to 35℃,and grayish-white when it was greater than 36℃;the elongation at break of the fibers was 374%,the tensile strength was 3.65 MPa,the electrical conductivity was 5.12S/m,and the sensitivity to strain was 3.57,and the relative resistance varied consistently under the movement of high frequency.Thus,the PVA-AgNWs@PVA hydrogel fibers have excellent temperature and tensile sensing properties and boast potential application value in the field of flexible wearable devices.

关 键 词：水凝胶纤维 同轴湿法纺丝 高导电性 温敏响应 应变传感 

分 类 号：TQ342.83[化学工程—化纤工业]