基于热线法的纺织材料导热系数测试研究

Thermal conductivity measurement of textile materials with hot-wire method

针对热线法技术的测量原理、特点以及纤维材料的结构特征,采用高性能纤维长丝及其织物为研究对象,讨论了热线法测试过程中纤维及织物内部的热传递机理。研究了碳纤维、玄武岩纤维、玻璃纤维及芳纶纤维等纤维轴向与热线排列导向对导热系数的影响。对碳纤维、芳纶纤维等平纹织物的结构单元进行分析计算,建立了纤维长丝与平纹织物导热系数的数值关系。经验证,计算值与试验值的相对偏差在±3%以内。

Based on the measurement principle, characteristics of hot-wire method and the structural features of testing fiber, takinghigh-performance fibers and their woven fabrics as object, the heat transfer mechanism in hot-wire method and in the internal fibers andfabrics are discussed. The influence of the fiber axial and orientation on thermal coefficient is studied on carbon fiber, basalt fiber, glass fiberand aramid fiber. The construction units of the plain fabrics with carbon fiber and aramid fiber are calculated and analyzed, and the numericalrelation between fiber filament and thermal coefficient is established. It is verified that the measured thermal conductivities agree with therelation within a deviation of ±3%.