对位芳纶沉析纤维及其纸基材料性能的研究

Study on the Properties of Para Aramid Fibrid and PPTA Paper

关键词:  对位芳纶  沉析纤维  浆粕纤维  纤维特性  成纸性能

Key Words:para aramid  pulp  fibrids  properties of fibers  properties of paper

摘要:采用扫描电子显微镜、比表面积仪、纤维形态分析仪、X射线衍射仪等对比分析了对位芳纶沉析纤维和对位芳纶浆粕纤维的微观形貌、形态参数、结晶结构以及成纸性能。实验表明，与对位芳纶浆粕纤维相比，对位芳纶沉析纤维呈非粒状且尺寸较小，外形上既像皱膜又像薄片，表面活性高，比表面积大，达到7.35 m2/g；纤维细碎化程度高，长度均一性好，柔软性好，强韧性高；结晶度为28.55%，具备细微丝晶结构，有利于成纸的匀度和强度；配抄成纸机械强度和电气性能均高于对位芳纶浆粕纤维配抄的纸。

Abstract:This article analyzed and compared the morphology, crystal structure and morphological parameters of the para aramid pulp fibers and the fibrids as well as the properties of the papers made of the pulp fibers and fibrids by scanning electron microscopy, surface area analyzer, fiber morphology analyzer, X-ray diffraction and other modern instruments. It was found that compared with the pulp fibers, fibrid was non-granular and smaller in size, it had the shape like a slice or wrinkled membrane, with large surface area, to 7.35 m2/g, and high surface activity; fibrid crushing a high degree of uniformity, with good length distribution, softness, and high strength and toughness; fibrid crystallinity was 28.55%, with small grain size, it had fine silk crystal structure and it was conducive to the formation and strength of the paper; the mechanical strength and the electrical properties of fibrid paper was higher than PPTA pulp paper．