Effects Of Surface Treatment On Interfacial And Mechanical Properties Of Hollow Integrate Glass/Carbon Fibers Hybrid Composites

Hollow integrate glass/carbon fiber hybrid composites preform were weaved by retrofitted rapier loom. Then the hybrid preform were treated using Dielectric Barrier Discharge (DBD) plasma, DBD and coupling agent complex modification, so as to improve its interfacial and mechanical properties. The main research contents consist of the following five parts.(1) The designing and weaving of hollow integrated GF/CF hybrid preform. Design is based on choose of reinforcement materials, panel and core structures and texture parameters. The weaving process is based on retrofitted rapier loom and special method. Then hollow integrated GF/CF hybrid perform with formation panel, clear core structure can be woven.(2) Hollow integrated GF/CF hybrid preform was treated using DBD plasma equipment, and the appropriate plasma parameters were chose. GF/CF hybrid perform of"8"shape, 5mm high was treated by four different plasma powers. Then the treatment effects were characterized by SEM, FTIR, methylene blue adsorption test, wicking test and monofilament tensile test for choosing the appropriate plasma power.(3) DBD and coupling agent complex modification was used to treat the hybrid perform surface in order to improve its interfacial properties. SEM, FTIR, chemical mechanism analysis and monofilament tensile test were used to show that the compound treatment can form firm bond connection in the interface layer, and make GF/resin, CF/ resin with better interfaces.(4) The fiber/resin interface properties were tested and analysised before and after surface treatment, by GF/resin interfacial debonding test and carbon multifilament tensile test. The results showed that fiber/resin interfacial properties were improved after DBD plasma treatment, and the improvement is more significant after compound treatment.(5) Mechanical properties of the hollow integrate GF/CF hybrid composites were tested. Vacuum Assisted Resin Infusion was used to mold the hollow integrated GF/CF hybrid perform. And after molding, mechanical properties (including tensile, bending, compression) of the composites were tested. The results showed that mechanical properties of the hollow integrate GF/CF hybrid composites had greatly improved after compound surface treatment.The research provided a reliable reference for integrate fiber hybrid composites surface modification, but also laid a foundation for its mechanics performance optimization.