MWNTs改性Lyocell基碳纤维的结构及性能研究  

Structure and properties of MWNTs modified Lyocell-based carbon fibers

作　　者：鲁江[1] 邵惠丽[2] 

机构地区：[1]湖北工业大学,湖北武汉430068 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2016年第2期13-16,共4页China Synthetic Fiber Industry

基　　金：国家自然科学基金项目(50873024)

摘　　要：以纤维素浆粕为原料,添加多壁碳纳米管(MWNTs)制备纤维素质量分数为10%的纺丝原液,经干喷湿法纺丝制得MWNTs改性Lyocell纤维原丝,再经多段预氧化、高温碳化处理制备了MWNTs改性Lyocell基碳纤维,研究了所得碳纤维的结构和性能。结果表明:MWNTs改性Lyocell基碳纤维的表面比较光洁,没有明显的孔洞缺陷,MWNTs在碳纤维中的分散情况与其添加量有密切的关系;与纯Lyocell基碳纤维相比,MWNTs改性Lyocell基碳纤维的力学性能明显提高,含质量分数1%MWNTs的改性碳纤维的强度和模量分别提高了70%和116%;添加MWNTs质量分数1%的Lyocell纤维更适合作为碳纤维原丝,所得碳纤维形态结构完善、力学性能好。A spinning solution containing 10% cellulose by mass fraction was prepared by using cellulose pulp as raw material and adding multi-walled carbon nanotubes（ MWNTs） and was spun into MWNTs modified Lyocell precursor via dry-jet wet spinning process,which was produced into MWNTs modified Lyocell-based carbon fiber after multi-stage pre-oxidation and high-temperature carbonization. The structure and properties of the obtained carbon fiber were studied. The results showed that the MWNTs modified Lyocell-based carbon fiber had a smooth surface with no obvious porous flaws; the dispersion of MWNTs in carbon fiber was closely related to the MWNTs amount; as compared with pure Lyocell-based carbon fiber,the mechanical properties of MWNTs modified Lyocell-based carbon fiber were profoundly improved,and the strength and modulus of the modified carbon fiber containing 1% MWNTs by mass fraction were increased by 70% and 116%; and the modified Lyocell precursor containing1% MWNTs by mass fraction was more suitable for carbon fiber as a precursor,and the obtained carbon fiber had a perfect morphology and good mechanical properties.

关 键 词：纤维素纤维 多壁碳纳米管 碳纤维 改性 结构 性能 

分 类 号：TQ342.742[化学工程—化纤工业]