沉析纤维尺寸和含量对间位芳纶纸性能的影响  

Effect of precipitated fiber size and content on performance of m-aramid paper

作　　者：曹凯凯[1] 杨军[1] 伍威[1] 曹卓 杨锡鹏 曾勇 王进[1] 宋欢[1] CAO Kaikai;YANG Jun;WU Wei;CAO Zhuo;YANG Xipeng;ZENG Yong;WANG Jin;SONG Huan(Zhuzhou Time New Material Technology Co.,Ltd.,Zhuzhou 412007)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《合成纤维工业》2024年第2期30-36,共7页China Synthetic Fiber Industry

基　　金：湖南省科技创新团队项目(2021RC4072)。

摘　　要：使用不同目数的筛网对自制的Z沉析纤维进行筛分,将得到的不同尺寸的沉析纤维与间位芳纶短切纤维按一定质量比配抄成纸,制备间位芳纶纸;通过红外光谱、X射线衍射、扫描电镜及热失重、动态滤水分析对自制的Z沉析纤维的化学结构、热性能、动态滤水性能进行表征,并与进口的J沉析纤维对比;研究了沉析纤维的尺寸和含量对间位芳纶纸性能的影响。结果表明:Z沉析纤维与J沉析纤维均为膜状结构,化学结构基本一致,动态滤水性能及热性能相当;经30目或50目的筛网筛分后的沉析纤维可以与短切纤维更好地抱合,间位芳纶纸的抗张强度、断裂伸长率、撕裂度、击穿强度均达到较大值;间位芳纶纸的撕裂度随沉析纤维含量的增加逐渐降低,间位芳纶纸的抗张强度、断裂伸长率、击穿强度随沉析纤维含量的增加呈现先增后降的变化趋势,当沉析纤维质量分数为55%时,间位芳纶纸的抗张强度、断裂伸长率、击穿强度均达到最大值,分别为3.0 kN/m、5.50%、18.7 kV/mm。Precipitated fibers with different sizes were prepared by sieving self-made Z precipitated fibers with different mesh sizes of screens and were mixed with m-aramid short cut fibers in a certain mass ratio to prepare m-aramid paper.The chemical structure,thermal properties and dynamic water filtration performance of self-made Z precipitated fiber were characterized by infrared spectrometry,X-ray diffraction,scanning electron microscopy,thermogravimetric analysis and dynamic water filtration analysis and were compared with those of imported J precipitated fiber.The effects of the size and content of precipitated fibers on the properties of m-aramid paper were studied.The results showed that both Z precipitated fiber and J precipitated fiber had membranous structures,similar chemical structures and comparable dynamic water filtration and thermal properties;the precipitated fibers could better adhere to the short cut fibers after sieving with a 30-mesh or 50-mesh screen,and the tensile strength,elongation at break,tear resistance and breakdown strength of m-aramid paper all reached relatively high values;the tear resistance of m-aramid paper gradually decreased with the increase of precipitated fiber content;and the tensile strength,elongation at break and breakdown strength of m-aramid paper presented a trend of first increasing and then decreasing with the increase of precipitated fiber content,and were maximized as 3.0 kN/m,5.50%and 18.7 kV/mm,respectively,when the mass fraction of precipitated fibers was 55%.

关 键 词：间位芳纶 沉析纤维 间位芳纶纸 力学性能 击穿强度 

分 类 号：TQ342.721[化学工程—化纤工业]