耐紫外老化PBO纤维改性技术研究进展

Advances in UV-resistant PBO fiber modification technologies

聚对苯撑苯并双唑(PBO)纤维是继Kevlar纤维之后的新一代高性能有机纤维,具有高强度、高模量、高耐热性和高阻燃性等优点。但紫外光照射下PBO纤维机械强度急剧下降,制约了其进一步应用和发展。概述了PBO纤维的合成方法,通过PBO纤维晶体结构与分子链结构分析,阐述了紫外老化降解机理,综述了近年来表面涂覆法、化学共聚法以及新型配位键改性法的研究进展,对比分析了3种PBO纤维改性方法的优缺点,并展望了其未来发展方向。

Poly(p-phenylene benzobisoxazole)(PBO)fiber is a new generation of high-performance organic fiber after Kevlar fiber,which has the advantages of high strength,high modulus,high heat resistance and high flame retardancy.However,the mechanical strength of PBO fiber sharply decreases under UV irradiation,which restricts its further application and development.In this review,we introduced the synthesis methods of PBO fibers,described the mechanism of UV aging degradation through the analysis of the crystal structure and molecular chain structure of PBO fiber,reviewed the latest research developments of surface coating,chemical copolymerization and new coordination bond modification in recent years,compared and analyzed the advantages and disadvantages of three PBO fiber modification methods,and prospected the future advancement direction.