Effect of Dopamine on Interface Performance of Carbon Fiber Reinforced Polyphenylene Sulfide Composites
Carbon fiber reinforced polyphenylene sulfide(CF/PPS)composites have excellent comprehensive properties,but in practical applications,it has been found that the interface bonding between carbon fibers and polyphenylene sulfide is not ideal.Therefore,improving the interfacial bonding strength of CF/PPS to enhance its macroscopic mechanical properties has profound theoretical significance and application value.Based on the microsphere debonding technology,dopamine aqueous solution with excellent adhesion was used as interface modifier to modify the surface of fiber.Microsphere debonding experiment and macroscopic tensile test were used to explore the effect of different dopamine concentrations on the interface performance of CF/PPS.The results show that when the dopamine concentration is 2 g/L,polydopamine uniformly adheres to the surface of carbon fibers,forming a good micro nano structure,and the coating effect is the best,the maximum shear strength of the apparent interface is 36.09 MPa,which is 13.50％higher than before modification;the cross section of PD-CF2/PPS tensile sample show uneven shape,and the residual resin matrix is the most on the pulled carbon fiber,which exhibits a good interface modification effect.
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