摘要
本文对聚丙烯腈(PAN)/酶解木质素(EHL)混合物的增塑熔融纺丝进行了研究,并对获得的纤维的结构与性能进行了分析。采用单螺杆纺丝机在150~200℃可以实现PAN/EHL的增塑熔融纺丝,在不同的卷绕速度下(200~500m/min)可得到均匀连续、直径在35μm左右的卷绕丝。本文采用傅里叶红外(FTIR-ATR),热失重分析(TGA),扫描电镜(SEM)和X射线衍射等手段对纤维进行表征。结果表明,增塑剂脱除后对纤维表面和断面形貌进行观察发现,纤维表面基本光滑,径向结构均一,无皮芯结构,两相间具有良好的相容性。木质素的加入使得PAN/EHL增塑熔纺纤维的热稳定性及碳收率明显提高,同时结晶度下降。
Plasticized melt spinning of polyacrylonitrile(PAN)and enzymatic hydrolysis lignin(EHL)blends using ionic liquids as a plasticizer were investigated.The results showed that the plasticized melt spinning of PAN/EHL was realized by using a conventional single-screw spinning machine at 150~200℃.The continuous as-spun PAN/EHL fibers with a diameter of 35 um were obtained.The structure and properties of as-spun PAN/EHL fibers were characterized using fourier transform infrared spectroscopy(FTIR),thermal gravimetric analyzer(TGA),scanning electron microscope(SEM)and X-ray diffraction(XRD).After the extraction of plasticizer,the SEM images of as-spun PAN/EHL showed almost smooth surfaces and circle cross-section without skin-core structure,as well as the good compatibility between PAN and EHL.Owing to the incorporation of EHL,the thermal stability and carbon yield of PAN/EHL fiber improved significantly,while the crystallinity of PAN/EHL fiber decreased.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2014年第6期893-896,902,共5页
Journal of Materials Science and Engineering
基金
国家重点基础研究发展计划(973计划)子课题的资助项目(2011CB605603)
关键词
聚丙烯腈
酶解木质素
增塑熔融纺丝
碳纤维
Polyacrylonitrile
enzymatic hydrolysis lignin
plasticized melt spinning
carbon fibers
