CAJ | 학술논문

将氧化石墨烯与自制酚醛树脂乳液( PF)共混,经水合肼还原和热固化制备石墨烯/酚醛树脂( GNS/PF)纳米复合材料. 利用AFM﹑SEM﹑FTIR和TG-DTG技术考察石墨烯对GNS/PF复合材料的形貌﹑结构﹑热稳定性和残炭率的影响. 结果表明,石墨烯片均匀分布在PF中,没有发生团聚,且石墨烯片与PF间具有良好的界面结合. 石墨烯薄片对PF基体强烈的吸附作用增加了PF分子链的活性和有序性,显著提高了GNS/PF纳米复合材料内PF基体的固化交联密度,进而提高了PF基体的耐热性和高温残炭率. 在300~450℃条件下,纯酚醛树脂的热分解峰值温度为382. 7℃,添加质量分数0. 65%的GNS后,热分解峰值温度提高到408℃. 在隔绝空气下900℃热处理,纯酚醛树脂的残炭率为46. 2%,添加0. 65%氧化石墨烯后残炭率增至59. 4%,提高了13. 2%.
장양화석묵희여자제분철수지유액( PF)공혼,경수합정환원화열고화제비석묵희/분철수지( GNS/PF)납미복합재료. 이용AFM﹑SEM﹑FTIR화TG-DTG기술고찰석묵희대GNS/PF복합재료적형모﹑결구﹑열은정성화잔탄솔적영향. 결과표명,석묵희편균균분포재PF중,몰유발생단취,차석묵희편여PF간구유량호적계면결합. 석묵희박편대PF기체강렬적흡부작용증가료PF분자련적활성화유서성,현저제고료GNS/PF납미복합재료내PF기체적고화교련밀도,진이제고료PF기체적내열성화고온잔탄솔. 재300~450℃조건하,순분철수지적열분해봉치온도위382. 7℃,첨가질량분수0. 65%적GNS후,열분해봉치온도제고도408℃. 재격절공기하900℃열처리,순분철수지적잔탄솔위46. 2%,첨가0. 65%양화석묵희후잔탄솔증지59. 4%,제고료13. 2%.
A graphene/phenolic( GNS/PF) resin composite was prepared by blending a graphene oxide suspension with an emul-sion of phenolic resin in water, followed by reduction with hydrazine and curing at 160 ℃. AFM, SEM, FT-IR and TG-DTG were performed to reveal the effects of graphene on the morphology, structure, thermal stability and char yield of the composites. Results showed that GNS was uniformly dispersed in the PF matrix. Strong adsorption of GNS on the PF resulted in an ordered arrangement of PF along the GNS plane. The density of crosslinks in the PF matrix was drastically increased after curing and its thermal stability and char yield were remarkably improved. The thermal decomposition peak temperature was increased from 382. 7℃ for pure PF to 408 ℃ for the GNS/PF composites and the char yield of pure PF at 900 ℃ was increased from 46. 2% to 59. 4% for that in the composite containing 0. 65 wt% graphene oxide.