对位芳纶沉析/短切纤维及其纸基材料性能的研究  

Study on the Properties of Para-aramid Fibrid /Fiber and Their Paper Based Composite

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：《造纸科学与技术》2014年第4期28-33,共6页Paper Science & Technology

基　　金：国家高技术研究发展计划(863)重大项目(2012AA03A208);陕西省科技统筹创新工程计划项目(2011ktcg01-19);陕西省工业攻关项目(2011K08-08)

摘　　要：为了解对位芳纶沉析纤维这种新型纤维和短切纤维的特性,并制备出高性能纸基复合材料,本文采用SEM表征了芳纶纤维的表观形貌;通过纤维质量分析仪(Morfi Compact)、保尔筛分仪测定了纤维的形态参数;分别探讨了沉析/短切纤维的处理工艺及配抄比例对纸基材料性能的影响,并利用TGA研究了纸基的热学性能。结果表明:短切纤维呈刚性圆柱状,两端粗细一致,表面光洁均整;沉析纤维呈薄膜褶皱状,形态细小,纤维均一性好,细碎化程度高,有利于纸基材料的匀度和强度;采用沉析纤维的打浆度60SR,短切纤维的分散剂用量0.3%,配抄比例7:3的工艺条件,将获得最佳机械性能和介电性能的芳纶纸基材料;这种纸基材料初始分解温度高达535℃,TG10%为560℃,说明其热学稳定性优异。In order to reveal the performance of para - aramid fibrids which is a new material and fiber and their PPTA paper based composite. The microstructure features of fibers were characterized by scanning electron microscopy. The crystal structure of fibers was analyzed by fiber quality analyzer and fiber classifier. The effect of the treatment and ratio of fibers on PPTA paper based composite properties were investigated. Moreover, the thermal stability was investigated by TG -DSC. The results showed that the para -aramid fiber was smooth and nearly cylindrical in shape while fibrids exhibited small sized pieces with wrinkled surface, uniform size and highly degree of fragmentation, which is beneficial to enhance the strength and evenness of PPTA paper based composite. While the beating degree was 60SR, the PEO dosage was 0.3% , the ratio of fibrid to short fiber was 7：3, the mechanical and dielectric properties of the composite reached the maximum. The initial decomposition temperature and TG10% of paper are 535℃ and 560℃, respectively, which exhibit excellent thermal properties.

关 键 词：沉析纤维 结构 纸基材料 性能 

分 类 号：TQ342[化学工程—化纤工业]