氧化石墨纳米薄片表面接枝聚乙二醇

摘要

利用甲苯二异氰酸酯(TDI)作为连接剂,将聚乙二醇接枝在氧化石墨纳米薄片(GONPs)表面.氧化石墨选用改良的Hummers方法制备, 并用过量的TDI进行化学改性.经过改性后的氧化石墨在无水二甲基甲酰胺中剥离形成氧化石墨纳米薄片,随后在氮气保护下接枝上聚乙二醇.用X-射线衍射、傅里叶红外及元素分析对产物进行研究表征.%Polyethylene glycol (PEG) was grafted onto the graphite oxide nanoplatelets (GONPs) surface successfully using toluene diisocyanate (TDI) as coupling agent. The graphite oxide is synthesized by graphite oxide is exfoliated into two-dimensional GONPs in anhydrous N, N-dimethylformamide and grafted polyethylene glycol under nitrogen atmosphere. The product is characterized by X-ray diffraction, FT-infrared analysis and elemental analysis.