탄소섬유 표면에의 고분자 전착과 복합 재료에의 응용에 관한 연구

다국어 초록 (Multilingual Abstract)

Various surface treatment techniques can be applied onto the surface of carbon fibers to increase interlaminar shear strength (ILSS) It is well known that ILSS can be increased by the strong adhesion between fiber and matrix but impact strength may be decreased. To solve this problem, a method that introduced ductile interphase between fiber and matrix was applied. The optimum thickness was in the range of 0.1㎛ - 0.2㎛. In this study, by using electric conductivity of carbon fiber, flexible polymer which has ionizable group was coated onto the surface of carbon fiber by the technique of electrodeposition. After that manufactured composites were evaluated. The thickness of interphase was controlled by weight gain onto the carbon fibers. For this purpose, parameters for electrodeposition were studied. Interlaminar shear strength and impact strength of composites were evaluated according to the surface treatments; commercial treatment, with interphase, and without interphase. For the case of MVEMA, 0.1-0.2㎛ thickness of interphase were introduced with the condition of 1 wt% solid contens, 100 mA/g of current density, 7min of reaction time, and 10.9 pH. For the case of EMA, optimum thickness of interphase were introduced with the condition of 0.5 wt% of solid contents, 250mA/g of current density, 12 min of reaction time. Composites were made with these treated carbon fibers and epoxy resin sheets by using a hot press. For the ILSS, MVEMA interphase introduced composites showed the same results with commercially surface treated composites. For impact strength, composites introduced MVEMA interphase showed better results than they other composites. The effect of interphase thickness was studied for ILSS and impact resistance. Because of decreasing adhesion of fiber/matrix, ILSS was decreased to increasing thickness of interphase materials. And impact resistance was increased to increasing thickness of interphase materials. Introducing interphase materials, water resistance was worse than no treated carbon fiber reinforced composites.

목차 (Table of Contents)

• 제 1 장 서론
• 제 2 장 이론적 배경
• 제 3 장 실험
• 4. 실험결과
• 제 5 장 토의 및 결론
• 제 6 장 참고문헌
• Synopsis