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1372.76 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。
In order to develop a flexible composite material for fire warning,MXene/aramid aerogel fibers for fire warning were successfully prepared by microfluidic spinning and freeze-drying using aramid nanofibers as the substrate.Scanning electron microscopy,vertical combustion test and fire warning test were used to explore the surface morphology,thermoelectric and thermal stability of fibers with different MXene mass fraction and before/after polymerization of PPy.The results show that,with the increase of MXene content,the conductivity and mechanical properties of composite fibers also increase.When the MXene mass fraction reaches 40%,the electrical conductivity and mechanical strength of the composite fibers can reach 1372.76 s/m and 1.36 MPa,respectively.At the same time,based on the unique Seebeck effect of thermoelectric materials,the fire warning aerogel fiber 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.
作者
徐杰
王丽丽
邵义伟
何华玲
于志财
Xu Jie;Wang Lili;Shao Yiwei;He Hualing;Yu Zhicai(College of Textile Science and Engineering,Wuhan Textile University,Hubei Wuhan 430200,China;Jiangsu Hengli Chemical Fiber Co.,Ltd.,Jiangsu Suzhou 215288,China)
出处
《消防科学与技术》
CAS
北大核心
2024年第12期1714-1719,共6页
Fire Science and Technology
基金
湖北省自然科学基金指导性项目(2022-CFC072)。
作者简介
徐杰(1999-),男,湖北恩施人,武汉纺织大学纺织科学与工程学院研究生,主要从事功能防护纺织品方面的研究,湖北省武汉市江夏区阳光大道特一号,430200;通信作者:于志财,武汉纺织大学纺织科学与工程学院特聘教授,yuzhicaicai@163.com。
