芳纶纤维/NFC复合纸基材料的界面及强度性能研究  

Study on interfacial bonding and strength properties of aramid Fiber/NFC paper based compsite

作　　者：郝杨[1] 陆赵情[1] 赵永生[1] 丁威 张美娟 

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]浙江仙鹤股份有限公司,浙江衢州324022

出　　处：《陕西科技大学学报》2017年第3期18-24,29,共8页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅科技新星专项项目(2015KJXX-34);陕西省教育厅产业化培育计划项目(15JF012)

摘　　要：芳纶纸基材料中由于芳纶纤维表面呈惰性,与基体之间的界面结合强度不佳.而纳米纤维素(NFC)因其优异的性能对复合材料具有增强效果.采用磷酸溶液对芳纶纤维进行改性来增加其表面粗糙度和活性,并研究了NFC含量对芳纶纸基材料性能的影响.结果表明,当NFC的含量为20%时,成纸的抗张指数、撕裂指数、层间结合强度分别提高了1.99、1.5和1.66倍,抗张能量吸收(TEA)提高了99.7%.傅立叶红外光谱仪(FT-IR)表明强度性能的提升主要是因为NFC表面丰富的游离羟基和芳纶纤维表面的活性基团能够产生很强的氢键缔合作用;扫描电镜(SEM)结果显示NFC像"蛛网"或"蚕丝"状的薄膜结构粘贴在芳纶纤维上,作为短切纤维和沉析纤维的界面粘结桥梁和填充剂而使得纸张的界面粘结强度大幅度提高.The interfacial bond strength between aramid fiber and matrix is inferior because of the surface inertness of aramid fiber in aramid paper sheet. Nanofiber cellulose （NFC） has been widely studied in reinforcing composite due to its excellent mechanical performance. In this paper,aram id fiber was modified by phosphoric acid solution in order to increase its sur-face activity and roughness. The aram id fiber/NFC paper composites was prepared by adding different ratios ofNFC and the properties of aram id fiber/NFC paper based composite were investigated. The results showed that the paper tensile index, tear index, interlayer bond strength increased by 1. 99,1. 5 and 1. 66 times, respectively. In addition, TEA was also im-proved by an increment of 99. 7 % with 20% NFC. It can be found that enhanced mechanical properties of aramid fiber /NFC paper were derived from the strong hydrogen bonding inter-action between aramid fiber and NFC by the fourier transform infrared spectroscopy （FT- IR）. The scanning electron microscopy（SEM） showed that NFC thin iilm structure just like the “ spider web” or “ silk” could become the pivotal bonding bridge and iilling agent between chopped and fibrid,which could improve interficail adhesion strength of paper sheet greatly.

关 键 词：芳纶纤维 NFC 界面结合 强度性能 

分 类 号：TQ342.722[化学工程—化纤工业]