硼酸浸渍碳纤维对激光石墨化效果的影响  

Influence of boric acid impregnation of carbon fiber on laser graphitization effect

作　　者：卿晋锋 丁奇胜 程礼盛[1,2] 谭晶[1,2] 杨卫民[1,2] Qing Jinfeng;Ding Qisheng;Cheng Lisheng;Tan Jing;Yang Weimin(Institute of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029)

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]北京化工大学,有机无机复合材料国家重点实验室,北京100029

出　　处：《化工新型材料》2024年第6期144-148,共5页New Chemical Materials

摘　　要：在激光石墨化前对聚丙烯腈(PAN)基碳纤维进行硼酸(H_(3)BO_(3))浸渍处理,通过改变H_(3)BO_(3)含量和H_(3)BO_(3)浸渍时间考察H_(3)BO_(3)浸渍对激光石墨化效果的影响,采用拉曼光谱仪和X射线衍射仪对石墨化碳纤维的化学结构和微观形貌进行表征。结果表明:微量的硼可以进入石墨片层结构,石墨碳微晶的堆叠厚度L_(c)增大、石墨片层间距d_(002)减小、方位角半高宽减小、结晶度提高,同时石墨化程度提高;而过量的硼使得微晶结晶度和石墨化程度降低;在H_(3)BO_(3)含量和浸渍时间相同条件下,随着激光功率的增加,碳纤维石墨化程度显著提高。Polyacrylonitrile(PAN)-based carbon fibers were impregnated with boric acid(H_(3)BO_(3))before laser graphitization.The influence of H_(3)BO_(3) impregnation on laser graphitization effect was investigated by changing H_(3)BO_(3) content and impregnation time.The chemical structure and microscopic morphology of the graphitized carbon fibers were characterized by Raman spectrometer and X-ray diffractometer.The results showed that trace boron could enter the graphite lamellar structure,the stacking thickness L_(c) of graphite carbon microcrystals increased,the graphite lamellar spacing d_(002) decreased,the azimuth half-height width decreased,the crystallinity increased,and the degree of graphitization increased.However,excessive boron decreased the microcrystal crystallinity and graphitization degree.Under the same H_(3)BO_(3) concentration and impregnation time,the degree of graphitization of carbon fibers increased significantly with the increase of laser power.

关 键 词：碳纤维 激光石墨化 石墨化程度 结晶度 

分 类 号：TQ342.74[化学工程—化纤工业]