CAJ | 학술논문

目的：提高碳纤维与基体树脂间的粘结力。方法对碳纤维表面进行聚甲基丙烯酸甲酯化学接枝改性。首先利用硝酸和硫酸的混酸对碳纤维进行预处理，使表面形成一定反应官能团，再以过氧化苯甲酰( BPO)为引发剂，甲基丙烯酸甲酯( MMA)为单体，通过悬浮法进行聚合。对处理前后的碳纤维进行红外光谱分析、热重分析、显微形貌分析和XPS分析。结果接枝碳纤维的红外光谱在1775.28 cm-1处出现了C O伸缩振动的特征峰；在740益时的热失重率为6.08%，比未处理时及混酸处理后增加约5%左右。表面形态显示，在碳纤维表面局部地方有PMMA存在；XPS分析结果显示，化学接枝后的碳纤维表面比接枝前有更多的含氧官能团。结论该方法可以使MMA在碳纤维的表面发生聚合反应，以化学键的形式接枝在碳纤维表面。
목적：제고탄섬유여기체수지간적점결력。방법대탄섬유표면진행취갑기병희산갑지화학접지개성。수선이용초산화류산적혼산대탄섬유진행예처리，사표면형성일정반응관능단，재이과양화분갑선( BPO)위인발제，갑기병희산갑지( MMA)위단체，통과현부법진행취합。대처리전후적탄섬유진행홍외광보분석、열중분석、현미형모분석화XPS분석。결과접지탄섬유적홍외광보재1775.28 cm-1처출현료C O신축진동적특정봉；재740익시적열실중솔위6.08%，비미처리시급혼산처리후증가약5%좌우。표면형태현시，재탄섬유표면국부지방유PMMA존재；XPS분석결과현시，화학접지후적탄섬유표면비접지전유경다적함양관능단。결론해방법가이사MMA재탄섬유적표면발생취합반응，이화학건적형식접지재탄섬유표면。
Objective To improve the bonding ability between carbon fiber and matrix resin. Methods The surface of carbon fi-ber was modified by chemical grafting of PMMA. First, mixed acids of nitric acid and sulfuric acid were used to pretreat the carbon fiber, leading to the formation of reactive functional groups on the surface, and then benzoyl peroxide ( BPO) was used as the initi-ator and methyl methacrylate ( MMA) as the monomers to realize polymerization by the suspension method. The carbon fiber sam-ples before and after treatment were characterized by FT-IR,TG, SEM and XPS analyses. Results Streching vibration characteristic peaks of carbonyl groups appeared at 1775. 28 cm-1 in the infrared spectra of grafted carbon fiber. The thermal weight loss rate was 6. 08% after grafting, which was about 5% more than those of untreated sample and mixed acid treated samples. The surface mor-phology showed that PMMA existed in local regions on the surface of the carbon fiber. XPS result revealed that there were more ox-ygen containing groups on the surface of carbon fiber after chemical grafting. Conclusion The method enabled MMA polymerization on the surface of carbon fiber, in the form of grafting chemical bond on the surface of carbon fiber.