PBO纤维表面二氧化钛涂层的构建及其抗紫外光性能研究

Construction of titanium dioxide coating on the surface of PBO fiber and study on its anti-ultraviolet property

为提高聚对苯撑苯并二噁唑(PBO)纤维的抗紫外老化性能,以3-氨丙基三甲氧基硅烷(APTMS)为桥梁,在PBO纤维表面构建二氧化钛(TiO_(2))涂层,并考察了纤维改性前后的表面形貌、界面剪切强度(IFSS)、以及紫外光照射前后的力学性能等变化.研究结果表明,在PBO纤维表面构建二氧化钛涂层后,PBO纤维与树脂的界面剪切强度提高了43.5%;PBO纤维的抗紫外光性能大幅增强,经200 h加速老化实验后其拉伸强度保持率提高了25%.

In order to improve the anti-ultraviolet aging performance of poly-p-phenylene benzodioxazole(PBO)fiber,3-aminopropyltrimethoxysilane(APTMS)was used as a bridge to build a titanium dioxide(TiO_(2))coating on the surface of PBO fiber.The surface morphology,interfacial shear strength(IFSS)before and after modification of fiber,and the mechanical properties before and after UV irradiation were also investigated.The research results showed that after constructing a titanium dioxide coating on the surface of the PBO fiber,the shear strength of the interface between the PBO fiber and the resin was increased by 43.5%.The UV resistance of PBO fiber was greatly enhanced,and its tensile strength retention rate was increased by 25%after 200 h accelerated aging test.