多壁碳纳米管/玻璃纤维/环氧树脂界面粘结特性研究  

STUDY ON INTERPHASE BONDING CHARACTERISTICS OF MULTI-WALLED CARBON NANOTUBES/GLASS FIBER/EPOXY RESIN

作　　者：吕晓敏[1] 孙志杰[1] 李敏[1] 顾轶卓[1] 张佐光[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室,北京100191

出　　处：《玻璃钢／复合材料》2012年第1期24-28,共5页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金项目(50803002);北航领航创新基金(YWF-10-01-A03)

摘　　要：本文对一种多壁碳纳米管进行表面酸化和胺化改性处理,通过超声波分散制备碳纳米管/玻璃纤维/环氧树脂单丝复合试样,采用单丝断裂法研究碳纳米管对玻璃纤维/环氧树脂界面粘结特性的影响。实验结果表明,加入碳纳米管后环氧树脂弯曲性能提高,单丝复合体系的拉伸应力-应变曲线在屈服点之后产生波动。通过比较纤维断点数-应变曲线、偏光下纤维断点形貌以及断口形貌SEM图像发现,对于玻璃纤维体系,加入硅烷偶联剂KH560后,碳纳米管可明显提高玻璃纤维/环氧界面粘结强度,并以胺化碳管改性体系影响最为显著。Multi-walled carbon nanotubes were functionalized by acid oxidization and amination methods,and then were dispersed into epoxy resin to prepare single fiber specimens by means of ultrasonic treatment.The effects of the carbon nanotubes on the interphase bonding characteristics of glass fiber/epoxy were studied using single fiber fragmentation test(SFFT).The improved flexural strength were found in carbon nanotubes modified epoxy samples.Eccentric fluctuating behavior after the yielding point emerges in the curves of tensile stress-strain for single fiber specimens.Based on the curves of number of fragments-strain,birefringence morphology of fiber break points and SEM images of fracture sections,it is revealed that carbon nanotubes can significantly improve the bonding strength of glass fiber/epoxy interphase with the addition of silane coupling agent KH560,especially for the aminated carbon nanotubes.

关 键 词：玻璃纤维 碳纳米管 环氧树脂 界面 纤维/基体粘结 单丝断裂法 

分 类 号：TB3[一般工业技术—材料科学与工程]