MXene/芳纶火灾预警气凝胶纤维的制备及性能研究
Preparation and properties study of MXene/aramid fire warning aerogel fiber
徐杰 1王丽丽 2邵义伟 2何华玲 1于志财3
作者信息
- 1. 武汉纺织大学 纺织科学与工程学院,湖北 武汉 430200
- 2. 江苏恒力化纤股份有限公司,江苏 苏州 215288
- 3. 武汉纺织大学 纺织科学与工程学院,湖北 武汉 430200;江苏恒力化纤股份有限公司,江苏 苏州 215288
- 折叠
摘要
为了开发一种柔性的火灾预警功能复合材料,以芳纶纳米纤维作为基材,通过微流控纺丝与冷冻干燥技术,成功制备了MXene/芳纶火灾预警气凝胶纤维.采用扫描电子显微镜、垂直燃烧试验以及火灾预警测试等探究了不同MXene质量分数和PPy聚合前后的表面形貌、热电和热稳定等性能.结果表明:随着MXene含量的增加,复合纤维的导电性和机械性能也提升.当MXene质量分数达到40%时,复合纤维的电导率和机械强度分别可以达到 1 372.76 s/m和 1.36 MPa;同时基于热电材料特有的塞贝克效应,该火灾预警气凝胶纤维能够在100～300℃的温度范围内进行精准的温度传感,还能在无需外接电源的情况下,接触火焰后3.5 s内产生1.89 mV电压,触发预警,为人们提供及时撤离信号.
Abstract
In order to develop a flexible composite material for fire warning,MXene/aramid aerogel fibers for fire warning were suc-cessfully prepared by microfluidic spinning and freeze-drying us-ing aramid nanofibers as the substrate.Scanning electron micros-copy,vertical combustion test and fire warning test were used to explore the surface morphology,thermoelectric and thermal sta-bility of fibers with different MXene mass fraction and before/af-ter polymerization of PPy.The results show that,with the in-crease of MXene content,the conductivity and mechanical proper-ties of composite fibers also increase.When the MXene mass frac-tion reaches 40%,the electrical conductivity and mechanical strength of the composite fibers can reach 1 372.76 s/m and 1.36 MPa,respectively.At the same time,based on the unique See-beck effect of thermoelectric materials,the fire warning aerogel fi-ber can accurately sense the temperature in the temperature range of 100～300℃,and can also generate a voltage of 1.89 mV within 3.5 s after contact with the flame without external power supply,triggering the early warning,providing timely evacuation signals for people.
关键词
火灾预警/温度传感/MXene/聚吡咯/气凝胶纤维Key words
fire warning/temperature sensing/MXene/polypyr-role/aerogel fiber引用本文复制引用
出版年
2024
NETL
NSTL
万方数据