Graphene nanoplatelets (GNP) were exfoliated using a nondestructive chemical reduction method and subsequently decorated with polymers using two different approaches: grafting from and grafting to. Poly(methyl methacrylate) (PMMA) with varying molecular weights was covalently attached to the GNP layers using both methods. The grafting ratios were higher (44.6% to 126.5%) for the grafting from approach compared to the grafting to approach (12.6% to 20.3%). The products were characterized using thermogravimetric analysis–mass spectrometry (TGA-MS), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), atomic force microscopy (AFM), and transmission electron microscopy (TEM). The grafting from products showed an increase in the grafting ratio and dispersibility in acetone with increasing monomer supply; on the other hand, due to steric effects, the grafting to products showed lower absolute grafting ratios and a decreasing trend with increasing polymer molecular weight. The excellent dispersibility of the grafting from functionalized graphene, 900 μg/mL in acetone, indicates an increased compatibility with the solvent and the potential to increase graphene reinforcement performance in nanocomposite applications.

中文翻译：

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接枝从与接枝到途径为石墨烯微片的功能化与聚（甲基丙烯酸甲酯）

石墨烯纳米薄片（GNP）用非破坏性化学还原法剥离，随后装饰有使用聚合物两种不同的方法：从接枝和嫁接。使用两种方法，将分子量不同的聚甲基丙烯酸甲酯（PMMA）共价连接到GNP层上。接枝比率为较高（44.6％至126.5％）从接枝比的方法接枝到的方法（12.6％对20.3％）。使用热重分析-质谱（TGA-MS），拉曼光谱，X射线光电子能谱（XPS），X射线衍射（XRD），原子力显微镜（AFM）和透射电子显微镜（TEM）对产品进行表征。对于g从漂流随着单体供应的增加，产物显示出接枝率和在丙酮中的分散性增加。另一方面，由于空间效应，接枝至产物显示出较低的绝对接枝率，并且随着聚合物分子量的增加而降低。从功能化石墨烯接枝的优异分散性（900μg/ mL在丙酮中）表明与溶剂的相容性增强，并具有在纳米复合材料应用中增强石墨烯增强性能的潜力。