采用微波辐射原位聚合制备含石墨烯片 PMMA 的合成与表征。

Synthesis and characterization of the in situ bulk polymerization of PMMA containing graphene sheets using microwave irradiation.

机构信息

King Abdulaziz City for Science & Technology, National Nanotechnology Research Center, PO Box 6086, Riyadh 11442, Saudi Arabia.

出版信息

Molecules. 2013 Mar 11;18(3):3152-67. doi: 10.3390/molecules18033152.

Polymethylmethacrylate-graphene (PMMA/RGO) nanocomposites were prepared via in situ bulk polymerization using two different preparation techniques. In the first approach, a mixture of graphite oxide (GO) and methylmethacrylate monomers (MMA) were polymerized using a bulk polymerization method with a free radical initiator. After the addition of the reducing agent hydrazine hydrate (HH), the product was reduced via microwave irradiation (MWI) to obtain R-(GO-PMMA) composites. In the second approach, a mixture of graphite sheets (RGO) and MMA monomers were polymerized using a bulk polymerization method with a free radical initiator to obtain RGO-(PMMA) composites. The composites were characterized by FTIR, (1)H-NMR and Raman spectroscopy and XRD, SEM, TEM, TGA and DSC. The results indicate that the composite obtained using the first approach, which involved MWI, had a better morphology and dispersion with enhanced thermal stability compared with the composites prepared without MWI.

聚甲基丙烯酸甲酯/石墨烯（PMMA/RGO）纳米复合材料是通过两种不同的制备技术，通过原位本体聚合制备的。在第一种方法中，使用自由基引发剂通过本体聚合方法聚合氧化石墨（GO）和甲基丙烯酸甲酯单体（MMA）。加入还原剂水合肼（HH）后，通过微波辐射（MWI）将产物还原，得到 R-（GO-PMMA）复合材料。在第二种方法中，使用自由基引发剂通过本体聚合方法聚合石墨片（RGO）和 MMA 单体，得到 RGO-（PMMA）复合材料。通过傅里叶变换红外光谱（FTIR）、（1）H-NMR 和拉曼光谱以及 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、热重分析（TGA）和差示扫描量热法（DSC）对复合材料进行了表征。结果表明，与未经过 MWI 处理的复合材料相比，通过第一种方法（涉及 MWI）制备的复合材料具有更好的形态和分散性，并且热稳定性得到了增强。