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多壁碳纳米管经过强氧化性酸的处理后,经XPS表征结果得出表面含有羧基的碳纳米管(MWNTs-COOH)。MWNTs-COOH经过超声处理后放入4,6-二氨基间苯二酚和对苯二甲酸的多聚磷酸体系中,原位聚合得到MWNTs-COOH/聚对苯撑苯并双噁唑(PBO)复合材料,经液晶纺丝得到MWNTs-COOH/PBO纤维。用纤维界面分析仪测试MWNTs-COOH的加入对PBO纤维/环氧树脂界面剪切强度的影响。通过SEM和AFM对纤维的表面形貌进行观察,可看出MWNTs-COOH的加入改善了PBO与环氧树脂的界面强度。
After the multi-walled carbon nanotubes treated by strong oxidizing acid, the carbon nanotubes (MWNTs-COOH) with carboxyl groups on the surface were obtained by XPS characterization. MWNTs-COOH was sonicated and placed in a polyphosphoric acid system of 4,6-diamino resorcinol and terephthalic acid. In situ polymerization of MWNTs-COOH gave MWNTs-COOH / polyparaphenylenebenzobisoxazole (PBO ) Composite material, the liquid crystal spinning MWNTs-COOH / PBO fiber. The influence of the addition of MWNTs-COOH on the interfacial shear strength of PBO fibers / epoxy was tested by fiber interface analyzer. SEM and AFM were observed on the surface morphology of the fibers, it can be seen that the addition of MWNTs-COOH improves the interfacial adhesion between PBO and epoxy resin.