生物酶催化接枝芳纶纤维和复合材料的界面性能  

Surface Modification and Interface Properties of Enzymemediated Grafting Kevlar Fibers

作　　者：刘洋[1] 梁国正[2] 

机构地区：[1]咸阳师范学院化学与化工学院,咸阳712000 [2]苏州大学化学化工学院,苏州215006

出　　处：《材料研究学报》2015年第10期794-800,共7页Chinese Journal of Materials Research

基　　金：陕西省教育厅项目2013JK0918;咸阳师范学院专项科研基金12XSYK026资助项目~~

摘　　要：用辣根过氧化物酶(HRP)作为生物活性酶催化剂在芳纶纤维纤维表面上进行接枝反应,生成一层带有活性官能团烯丙基缩水甘油醚的包覆层,研究了生物酶催化接枝反应对芳纶纤维综合性能的影响。结果表明,生物酶能有效地催化纤维上的接枝反应,酶的浓度影响单体在纤维上的接枝率。随着酶浓度的提高有更多的单体接枝到纤维上,使表面极性官能团含量、表面自由能和表面粗糙度大幅度地提高,使纤维与树脂之间的界面结合强度增强。同时,与原有的纤维改性方法相比,生物酶催化接枝法基本保持了芳纶纤维的优异热学和力学性能。Surface coating with functional groups on Poly （p-phenylene terephthalaramide） （Kevlar, KF） fibers was prepared through a polymerization using horseradish peroxidase （HRP） as bioactive cata- lyst. The effect of this approach on integrated properties of KF fibers was investigated. The results show that the polymerization can effectively perform on the fiber surface with the presence of HRP. The HRP content affects the grafting percentage of the fiber surface. More monomer was grafted on the fiber sur- face with the increase of HRP content, and there with the fiber surface possessed higher amount of po- largroups, higher surface free energy, and higher roughness which then resulted in the enhancement of interface adhesion between the fibers with the resin matrix of the composite fibers/resin. Besides, this HRP catalytically grafted fibers hold more or less the same thermal and mechanical properties as the orig- inal KF fibers.

关 键 词：有机高分子材料 生物酶接枝 芳纶纤维 表面改性 机械性能 

分 类 号：TB324[一般工业技术—材料科学与工程]