摘要
为增强氧化石墨烯的疏水性,以鳞片石墨为原料,在改进Hummers法制备氧化石墨烯的基础上,采用水热法制得Fe_3O_4/石墨烯,并采用戊二醛交联法对其进行聚乙烯亚胺改性,得到聚乙烯亚胺修饰的Fe_3O_4/石墨烯复合材料。利用X-射线衍射、傅里叶红外光谱、扫描电子显微镜、透射电子显微镜及热重分析表征该复合材料的结构、形貌及成分组成。结果表明:由于聚乙烯亚胺分子间相互交联反应,聚乙烯亚胺修饰Fe_3O_4/石墨烯复合材料的Fe_3O_4纳米粒子包裹在聚乙烯亚胺分子胶层及石墨烯片层中,Fe_3O_4纳米粒子粒径约为35 nm,分布均匀,尺度较均一。该研究为制备改性及修饰的石墨烯复合材料提供了一种简单方法。
This paper is targeted at enhancing the hydrophobicity of graphene oxide. The study involves obtaining Fe3O4/graphene by using flake graphite as raw material,improving the preparation of graphene oxide by Hummers method,and employing hydrothermal method; modifying polyethyleneimine using glutaraldehyde crosslinking method and thereby obtaining polyethyleneimine modified Fe3O4/graphene composites; and ultimately characterizing the structures,morphologies and compositions of graphene oxide,Fe3O4,Fe3O4/graphene and polyethylene imine modified Fe3O4/graphene by X-ray diffraction,Fourier infrared spectrum,scanning electron microscope,transmission electron microscope and thermogravimetric analysis. The results demonstrate that intermolecular crosslinking reaction of polyethylene imine results in Fe3O4 nanoparticles of polyethylene imine modified Fe3O4/grapheme being enwrapped in polyethylene imine rubber internal molecules and grapheme sheet layers,with the result that Fe3O4 nanoparticles have particle size of about 35 nm size,with uniform distribution and homogeneous size. This research could provide a simple method for preparing modified graphene composites.
作者
刘丽来
李勇
任秀君
殷秀珍
刘小珍
Liu Lilai;Li Yong;Ren Xiujun;Yin Xiuzhen;Liu Xiaozhen(School of Environmental ＆ Chemical Engineering,Heilongjiang University of Science ＆ Technology,Harbin 150022,China;Baotailong New Materials Co.Ltd.,Qitaihe 154603;School of Chemistry ＆Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China;School of Mining Engineering,Heilongjiang University of Science ＆ Technology,Harbin 150022,China)
出处
《黑龙江科技大学学报》
CAS
2018年第3期262-266,共5页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金青年科学基金项目(51604102)
黑龙江省博士后科研启动金资助项目(LBH-Z1620)
