生物酶催化接枝处理PPTA纤维表面研究  

Study on enzyme-mediated grafting of GMA to para-aramid fibers

作　　者：崔丽丽[1] 胡祖明[1,2] 于俊荣[1,2] 诸静[1,2] 王彦[1,2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《高科技纤维与应用》2015年第5期38-43,47,共7页Hi-Tech Fiber and Application

基　　金：国家863计划(2012AA03212);上海市自然科学基金(51473031)

摘　　要：采用生物酶催化接枝的方法处理PPTA纤维表面,运用正交实验方法探讨了最佳反应条件。对处理前后PPTA纤维进行了红外、X射线光电子能谱、扫描电镜、力学性能和拉曼表征。结果发现:改性后纤维表面出现了环氧官能团,表面碳元素物质分数明显降低,氧元素物质分数明显增加;改性后纤维表面粗糙度有了显著提高,纤维与环氧树脂间的界面剪切强度提高了34%,而纤维力学性能没有受到明显影响。其最佳反应条件为反应温度48℃、酶质量浓度0.01 mg/ml、单体质量分数5%、氧化剂质量浓度0.03 g/ml和p H值6.9。The paper focuses on enzyme-mediated grafting of GMA to PPTA fiber, and adopts the method of orthogonal experiment to explore the optimum conditions. Untreated and treated PPTA fibers are charactered by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, mechanical test, Raman spectroscopy and the micro-debonding method are utilized to analyze the interfacial shear strength. The results show that： after treatment, epoxy functional groups appear on the surface of fibers, there is a obvious decrease in carbon, and increase in oxygen; Moreover, modified fibers have higher surface roughness and the interfacial shear strength, and mechanical properties are not affected significantly. Optimum conditions： temperature is 48 ℃, enzyme concentration is 0.01 mg/ml, monomer concentration was 5%, oxidant concentration is 0.03 g/ml, pH value is 6.9.

关 键 词：生物酶催化改性 对位芳纶 界面剪切强度 力学性能 

分 类 号：TQ342.722[化学工程—化纤工业]