聚对苯撑苯并二噁唑纤维共聚改性研究进展  

Research progress on copolymerization modification of poly(p-phenylene benzobisoxazole)fibers

作　　者：张殿波 白金旺 钟蔚华[1] 梁晨 张君贤 ZHANG Dianbo;BAI Jinwang;ZHONG Weihua;LIANG Chen;ZHANG Junxian(Institute 53,China North Industries Group,Jinan 250031,China;Analysis and Testing Center,Shenzhen Technology University,Shenzhen 518118,China)

机构地区：[1]中国兵器工业集团第五三研究所,济南250031 [2]深圳技术大学分析测试中心,深圳518118

出　　处：《现代纺织技术》2024年第11期123-133,共11页Advanced Textile Technology

基　　金：国家重点研发计划项目(2022YFB3707900)。

摘　　要：聚对苯撑苯并二噁唑(PBO)纤维是目前综合性能最好的高性能有机纤维之一,但PBO纤维存在抗紫外光老化性能差、压缩强度低和界面粘结性能差等缺陷,无法满足航天、兵器等领域的严苛需求,因此需对其进行改性以提高性能。根据改性目的,从提升拉伸力学性能、提升压缩强度、改善界面粘接性能和提升抗紫外老化性能4个方面,综述了近年来国内外PBO纤维共聚改性技术的研究进展,提出共聚改性应充分考虑化学结构、凝聚态结构和纺丝工艺对最终纤维性能的综合影响,并对未来PBO纤维的共聚改性技术进行了展望。The PBO fiber is currently one of the high-performance organic fibers with the best comprehensive performance,featuring high strength,modulus,flame retardancy,and heat resistance.It is dubbed the"super fiber of the twenty-first century."The strength of PBO fibers reaches 5.8 GPa,and their modulus can reach 280 GPa.Their limiting oxygen index(LOI)is 68,and the thermal decomposition temperature is 650℃.Due to these excellent properties,PBO fibers can be applied in aerospace,weaponary and naval vessels,building reinforcement,high-temperature filtration,special protection and other fields.However,PBO fibers have performance shortcomings such as poor UV-aging resistance and weak interfacial adhesion,which limit its further application and development.They can not meet the stringent criteria of aerospace,weaponary,and other fields.Therefore,it is urgent to modify PBO fibers to improve their performance.This paper summarized the research progress of copolymerization modification technology of PBO fibers at home and abroad in recent years.It can be divided into four aspects based on the modification objectives:improving tensile mechanical properties,enhancing compressive strength,improving interfacial adhesion performance,and improving UV-aging resistance.The mechanical characteristics of PBO fibers can be further enhanced by copolymerizing PBO molecular chains with functionalized carbon nanotubes or graphene;although PBO fibers have a high tensile strength and modulus,they have a weak transverse compressive strength.By introducing chemical cross-links into the PBO macromolecular chain,their compressive strength can be significantly improved.However,PBO fibers have a smooth surface and do not contain polar groups,resulting in a weaker ability to bond with resin matrices.Adding carboxyl or hydroxyl groups to PBO molecular chains can effectively enhance the composite ability of PBO fibers with resins;the anti-UV aging performance of PBO fibers is relatively weak.Introducing intermolecular hydrogen bonds or fused ring str

关 键 词：PBO纤维 共聚改性 力学性能 界面粘结性能 耐紫外光老化性能 

分 类 号：TQ342[化学工程—化纤工业]