Impact of Surface Modiifcation of Carbon Fiber on Properties of PA66/CF Composites
Taking 10% mass fraction of carbon fiber(CF) reinforced polyamide(PA) as an experimental object,two modification methods of CF,including liquid phase acidification and a new polyamide sizing agent self-developed were tested. Functional groups on CF were analyzed with infrared spectra and the impacts of surface state of CF on microstructure and mechanical properties of PA66/CF composite were analyzed further. The results indicate that CF surface acidification rate is effectively increased in mixed acid with ammonium persulfate. Active functional group density on CF is increased with self-developed PA sizing agent and the compatibility between polyamide matrix and CF and interface microstructure are improved. Accordingly,mechanical properties of PA66/CF composite are increased. The tensile strength of PA66/CF composite increase from 115 MPa to 162MPa, increased by 40.87%,and impact strength increase from 7.8 kJ/m2 to 11.2 kJ/m2,increased by 43.59%.
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万方数据
维普
