碳纤维/聚硅氧硼烷阻燃改性环氧复合材料的制备及性能  

Preparation and Properties of Carbon Fiber/Poly(siloxane-borane)Flame Retardant Modified Epoxy Composite

作　　者：苏丽评 林修煌 乔华伟 许佳佳 刘灿培[1] 章华桂[1] 钟伟 兰加水 陈明锋[1,2] Liping Su;Xiuhuang Lin;Huawei Qiao;Jiajia Xu;Canpei Liu;Huagui Zhang;Wei Zhong;Jiashui Lan;Mingfeng Chen(College of Chemistry and Materials Science,Fujian Key Laboratory of Polymer Materials,Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering,Fujian Normal University,Fuzhou 350007,China;Fujian Innovation Center of Additive Manufacturing,Fuzhou 350002,China;Xiamen Waexim Rubber Co.,LTD.,Xiamen 361023,China)

机构地区：[1]福建师范大学化学与材料学院福建省高分子材料重点实验室福建省先进材料化工基础重点实验室,福建福州350007 [2]福建省增材制造创新中心,福建福州350002 [3]厦门万新橡胶有限公司,福建厦门361023

出　　处：《高分子材料科学与工程》2021年第5期36-42,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21805036);福建省自然科学基金资助项目(2019J01668);福建省泉州市科技局福建师范大学泉港石化研究院专项(2018YJY04);福建省增材制造创新中心开放基金(ZCZZ20-02)。

摘　　要：以苯硼酸和含磷硅氧烷为主要原料,设计合成了一种以Si-O-B为主链,侧链含苯环和磷杂菲基团的聚硅氧硼烷(PTDOB),在此基础上,以PTDOB为阻燃剂,碳纤维(CF)为增强材料,通过手糊结合模压成型的工艺制备了一种碳纤维/聚硅氧硼烷阻燃改性环氧复合材料(CF/PTDOB-EP)。采用极限氧指数、垂直燃烧、冲击强度和弯曲强度探究了CF/PTDOB-EP的阻燃和力学性能。结果表明,PTDOB的引入有效改善了复合材料的阻燃性能,CF/PTDOB-EP的极限氧指数提高到36.7%,并且通过了UL-94测试的V-1等级,说明PTDOB结构的磷杂菲和Si,B等元素充分发挥了阻燃作用。同时,CF/PTDOB-EP的冲击强度和弯曲强度分别达到120.5kJ/m^(2)和524.3MPa,提高了66.7%和37.4%,这是因为PTDOB结构中刚性的苯环和柔性的Si-O-B结构协同作用,赋予了CF/PTDOB-EP良好的力学性能,从而拓宽了碳纤维增强环氧复合材料的应用范围。Poly(siloxane-borane)(PTDOB)with Si-O-B as main chain and benzene ring and phosphaphenanthrene groups in side chain was designed and synthesized through the reaction between phenylboric acid and phosphorus-containing siloxane.Then,carbon fiber/poly(siloxane-borane)flame retardant modified epoxy composites(CF/PTDOB-EP)were prepared with PTDOB as flame retardant and carbon fiber(CF)as reinforced material by hand lay-up combined through hot press molding process.The flame retardancy and mechanical properties of CF/PTDOB-EP were investigated by limiting oxygen index,vertical combustion,impact strength and bending strength.The results show that the introduction of PTDOB effectively improves the flame retardancy of CF/PTDOB-EP with a limit oxygen index value of 36.7% and V-1 grade of UL-94 test,indicating that the phosphaphenanthrene and Si,B elements of PTDOB have excellent flame retardant effect.Meanwhile,the impact strength and bending strength of CF/PTDOB-EP reach 120.5 kJ/m^(2) and 524.3 MPa,increased by 66.7% and 37.4% respectively.This attributes to the synergistic effect of the rigid benzene rings and flexible Si-O-B structure in PTDOB endowed CF/PTDOB-EP with good mechanical properties,thus broadening the application ranges of carbon fiber reinforced epoxy composites.

关 键 词：碳纤维 聚硅氧硼烷 复合材料 阻燃性能 

分 类 号：TB332[一般工业技术—材料科学与工程]