Effect of PEK-C water-based sizing agent on interface properties of CCF/PEEK composites
In order to enhance the infiltration of poly(ether ether ketone)(PEEK)resin on continuous carbon fibers(CCF)and improve the interfacial properties of CCF/PEEK composites,phenolphthalein-based polyaryletherketone(PEK-C)aqueous emulsion prepared by self was used as a sizing agent to modify CCF,and CCF/PEEK composites were prepared by the laminated hot pressing method.The wettability of CCF fabric surface before and after sizing was tested,and the effects of sizing agent concentration on the flexural properties,porosity,and interlaminar shear strength(ILSS)of CCF/PEEK composite materials were studied.The results show that the contact angle of CCF surface decreases from 74.9°(prior to sizing treatment)to 53°(following sizing treatment)when the concentration of the PEK-C water-based sizing agent is 2%.The flexural strength,flexural modulus,and ILSS of CCF/PEEK composites prepared with CCF treated by sizing agent with 2%concentration are 895 MPa,72 GPa,and 66.7 MPa,which are 95.7%,72.7%,and 39.8%higher than those of the unsized CCF/PEEK composites,respectively.The porosity is only 0.85%.The PEK-C water-based sizing agent has been demonstrated to significantly enhance the interfacial bonding and compatibility between CCF and PEEK,as well as to improve the mechanical properties of CCF/PEEK composites.
NETL
NSTL
万方数据
