对位芳纶沉析纤维及其复合纸的结构与性能  

Structure and Properties of Para-Aramid Fibrid and Its Para-Phenylene Terephthalamide Paper

作　　者：陆赵情[1] 江明[1] 张美云[1] 宋顺喜[1] 杨斌[1] 

机构地区：[1]陕西科技大学陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021

出　　处：《高分子材料科学与工程》2015年第2期88-92,97,共6页Polymer Materials Science & Engineering

基　　金：国家高技术研究发展计划(863)重大项目(2012AA03A208);华南理工大学制浆造纸工程国家重点实验室开放基金项目(201333);陕西省科技统筹创新工程计划项目(2011ktcg01-19)

摘　　要：为研究对位芳纶沉析纤维这种新型纤维及其复合纸的结构与性能,文中采用光学显微镜、扫描电镜、原子力显微镜表征了纤维的表观形貌;通过纤维质量分析仪分析了纤维的形态参数;利用压汞仪定量表征了复合纸的结构特征,并综合研究了其力学性能、介电性能和热学性能。结果表明,沉析纤维呈薄膜褶皱状,形态柔顺,表面粗糙,在水相介质中分散均匀;重均长度0.552mm,细小纤维含量71.9%,纤维均一性好,细碎化程度高,有利于成纸的增强;芳纶复合纸的孔隙率为18.33%,孔径为14.64μm,成纸结合相对紧密,类似于钢筋混凝土结构;其拉伸指数为38.8 N·m/g,撕裂指数为18.4 m N·m2/g,耐压强度达到21.8 k V/mm;初始分解温度535℃,t10%为560℃,热学稳定性优异。In order to reveal the structure and performance of para-aramid fibrid and its para-phenylene terephthalamide(PPTA) paper,the microstructure features of fibrids were characterized by light microscopy(LM),scanning electron microscopy(SEM) and atomic force microscopy(AFM). The crystal structure of fiber was analyzed by fiber quality analyzer(Morfi Compact). The structure of PPTA-paper was analyzed by mercury intrusion porosimetry(MIP).The mechanical,dielectric properties and thermal stability were investigated. The results show that para-aramid fibrids exhibit small sized pieces with wrinkled surface,and can be dispersed evenly in water. The surface of fibrids is uneven.The fines content in the fibrids is 71. 9% and the weighted average length is 0. 552 mm; fibrid has a high degree of uniformity,which is beneficial to enhance strength of the paper. The structure of PPTA-paper is similar to reinforced concrete structure. The porosity and pore diameter of the paper are 18. 33%,14. 64 μm,respectively,which prove that the structure of paper is tight. The index of tensile strength and tear strength of PPTA-paper are 38. 8 N·m/g,18. 4 m N·m2/ g,respectively,and the dielectric strength is 21. 8 k V/mm. The initial decomposition temperature of paper is 535℃,t10%is 560 ℃,which exhibit excellent thermal properties.

关 键 词：对位芳纶 沉析纤维 复合纸 性能 

分 类 号：TS712[轻工技术与工程—制浆造纸工程]