CAJ | 학술논문

利用改进的Hummers法对天然鳞片石墨进行氧化处理制备氧化石墨烯,将其与甲基丙烯酸缩水甘油酯( GMA)在温和条件下反应,再经水合肼还原得到功能化石墨烯.分散性测试结果表明,超声后的功能化石墨烯可以稳定分散于丙酮、乙醇和N,N-二甲基甲酰胺等有机溶剂中.采用傅里叶变换红外光谱、 X射线衍射分析及X射线光电子能谱对样品的结构进行了表征.结果表明, GMA上的环氧基与氧化石墨烯上的羟基发生了化学反应,键合在氧化石墨烯表面；经水合肼还原后,层间距较功能化氧化石墨烯缩小,无序度增加.扫描电子显微镜( SEM)测试结果表明,功能化石墨烯含大量褶皱和卷曲；原子力显微镜( AFM)测试结果表明,功能化石墨烯的厚度为2~3 nm.热重分析结果表明,还原氧化石墨烯的热稳定性最高,功能化石墨烯次之,氧化石墨烯的热稳定性最低.
이용개진적Hummers법대천연린편석묵진행양화처리제비양화석묵희,장기여갑기병희산축수감유지( GMA)재온화조건하반응,재경수합정환원득도공능화석묵희.분산성측시결과표명,초성후적공능화석묵희가이은정분산우병동、을순화N,N-이갑기갑선알등유궤용제중.채용부리협변환홍외광보、 X사선연사분석급X사선광전자능보대양품적결구진행료표정.결과표명, GMA상적배양기여양화석묵희상적간기발생료화학반응,건합재양화석묵희표면；경수합정환원후,층간거교공능화양화석묵희축소,무서도증가.소묘전자현미경( SEM)측시결과표명,공능화석묵희함대량습추화권곡；원자력현미경( AFM)측시결과표명,공능화석묵희적후도위2~3 nm.열중분석결과표명,환원양화석묵희적열은정성최고,공능화석묵희차지,양화석묵희적열은정성최저.
Graphene oxide(GO) was prepared from natural graphite by modified Hummers’ method, then modified by glycidyl methacrylate ( GMA ) under mild conditions to obtain functionalized graphene oxide (FGO). The as-prepared FGO could be reduced by hydrazine hydrate to get functionalized graphene(FG). The dispersion test results show that FG can be stably dispersed in ethanol, acetone and N, N-dimethyl-formamide by sonication. Fourier transform infrared spectra, X-ray diffraction analysis and X-ray photoelectron spectra all demostrated that the epoxy of GMA can react with the hydroxy group of GO and connect with hex-atomic of GO by new covalent bond. The distance between FG sheets decrease and the disorder of FG increase after FGO was reduced by hydrazine hydrate. Scanning electron microscope ( SEM ) images show that FG showed typical corrugation and scrolling structures. Atomic force microscope ( AFM ) images show that the thickness of FG sheets is 2—3 nm. Thermo gravimetric analysis( TGA) results show that the thermostability of reduced graphene oxide ( RGO ) was better than that of FG, and the thermostability of GO was the most unstable.