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
楼恒屹 1万军民1
作者信息
- 1. 浙江理工大学材料科学与工程学院,杭州 310018
- 折叠
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4 mol/L氯化钠溶液中浸泡72 h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3.65 MPa,电导率为5.12 S/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.
Abstract
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 temperature-sensitive powder as the skin filler,and then the fibers were preserved in a 4 mol/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 5.12 S/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Key words
hydrogel fibers/coaxial wet spinning/high conductivity/temperature response/strain sensors引用本文复制引用
出版年
2024
NETL
NSTL
万方数据