聚乙二醇改性聚合纺丝液对湿纺聚丙烯腈初生纤维截面形貌和晶态结构的影响  

Influence of polyethylene glycol-600 modifying spinning solution on the cross section and crystal structure of wet spinning polyacrylonitrile nascent fibers

作　　者：史纪友[1,2] 吕春祥[2] 张寿春[2] 周普查[1,2] 李人杰[1,2,3] 贺福[2] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院山西煤炭化学研究所碳纤维制备技术国家工程实验室炭材料重点实验室,太原030001 [3]新疆武警消防总队,乌鲁木齐830000

出　　处：《化工新型材料》2010年第S1期88-91,共4页New Chemical Materials

基　　金：国家自然科学基金项目(50602045)

摘　　要：采用聚乙二醇-600(PEG-600)改性丙烯腈-衣康酸二元共聚的聚丙烯腈(PAN)纺丝液,并通过湿纺制备出初生纤维。通过接触角测试、光学显微镜、扫描电镜(SEM)、X-射线衍射(XRD)研究了PEG-600用量对PAN树脂亲水性、初生纤维横截面形貌、晶态结构的影响。结果表明,PEG-600用量为0.1%时,与未加PEG-600的样品相比,PAN树脂的亲水性降低,初生纤维的横截面仍为非圆形,皮芯结构增强,结晶度降低,晶粒尺寸变大;PEG-600用量为0.3%～0.5%时,与未添加PEG-600的样品相比,PAN树脂的亲水性较未加PEG-600的样品的亲水性增加,初生纤维的横截面为圆形,皮芯结构减弱,结晶度降低但比PEG-600用量为0.1%样品的高,晶粒尺寸与PEG-600用量为0.1%样品的相同。Spinning solution of acrylonitrile-itaconic acid copolymer was modified by polyethylene Glycol-600. The nascent fibers were produced by wet spinning. The influence of PEG-600 content on the hydrophilicity of the PAN resin,the cross section structure and crystal structure of the PAN nascent fibers were characterized by contact angle,optical microscope,scanning electron microscope (SEM) and X-ray diffraction (XRD). The results showed that,when the PEG-600 content was 0.1%,compared with the PAN resin without PEG-600,the hydrophilicity of the PAN resin decreased,and for the nascent fibers,the cross section was also non-circular,the skin-core structure enhanced,the crystallinity decreased,the crystal size largened; when the PEG-600 degree was 0.3%~0.5%,compared with the PAN resin without PEG-600,the hydrophilicity of the PAN resin increased,and for the nascent fibers,the cross section was circle,the skin-core structure weakens,the crystallinity decreases but increases compared with the nascent fibers with 0.1% PEG-600,the crystal size was the same to that of the nascent fibers with 0.1% PEG-600.

关 键 词：聚乙二醇 聚丙烯腈 接触角 结晶度 

分 类 号：TQ340.14[化学工程—化纤工业]