冷等离子体改性芳纶及其复合材料导热系数研究

Thermal conductivity of aramid fiber modified by cold plasma as composites

为研究芳纶复合材料的隔热性能,探索芳纶作为复合材料在防护领域的应用,对芳纶织物进行冷等离子体改性后涂覆不同含量的环氧树脂,并测试其导热系数。结果表明:经过冷等离子体处理后,纤维表面变得粗糙,导热系数相对较低;随着涂层树脂含量的增加,导热系数减小,隔热性能增强;与未处理的材料相比,经冷等离子体处理和环氧树脂涂层后,芳纶复合材料导热系数较小,隔热性能较强,说明等离子体刻蚀增强了芳纶与树脂基体的接触面积和结合力,更有利于提高复合材料的隔热性能。

In order to study the thermal insulation property of aramid composites and explore their applications in various fields, the aramid fabrics are modified by cold plasma and coated with different content of epoxy resin, using hot disk thermal constant analyzer to test the thermal conductivity of the materials. The results show that the surface of the fiber treated by cold plasma becomes coarse, and the thermal conductivity is relatively low. The smaller the thermal conductivity is, the better the thermal insulation property is. Compared with untreated materials, the aramid composites coated with cold plasma and epoxy resin have lower thermal conductivity and better thermal insulation. It is proved that the contact area and bonding force between aramid fiber and resin matrix are enhanced by plasma etching, which is more advantageous to the improvement of composite properties.