新型炭材料2019，Vol.34Issue(3)：286-295,10.
Si—B掺杂沥青基炭纤维的制备及其抗氧化性能
Preparation and oxidation resistance of Si—B co-doped pitch-based carbon fibers
摘要
Abstract
Si—B co-doped pitch-based carbon fibers were prepared from mixtures of polyborosilicane ( PSNB) and petroleum pitch with a PSNB content of 3 to 10 wt% to improve their oxidation resistance. The composition, microstructure, mechanical prop-erties and oxidation resistance of the fibers were investigated. Results show that with increasing PSNB content in the pitch, the ten-sile strength and Young＇s modulus decrease gradually, but the oxidation resistance increases significantly. For fibers prepared by car-bonization at 1400 ℃, the weight loss is 25% after oxidation at 600℃ for 240 min and 60% after oxidation at 650℃ for 140 min. However, these values are 46% and 99% of the respective values for the un-doped carbon fibers. The B2 O3 generated during oxida-tion of the Si-B co-doped carbon fibers has a good fluidity, and as a result a continuous glass film is formed on the surface of the fi-bers, which effectively inhibits carbon oxidation.关键词
聚硼硅氮烷/掺杂/炭纤维/抗氧化Key words
PSNB/Doping/Pitch-based carbon fibers/Oxidation resistance分类
化学化工引用本文复制引用
杜力,董志军,袁观明,丛野,朱辉,李轩科,罗永明..Si—B掺杂沥青基炭纤维的制备及其抗氧化性能[J].新型炭材料,2019,34(3):286-295,10.基金项目
国家自然科学基金专项项目(51352001) （51352001）
国家自然科学基金重大研究计划重点项目(91016003). Foundation item: National Natural Science Foundations of China(51352001, 91016003). （91016003）
