关键词: 聚甲基丙烯酸甲酯, 还原氧化石墨烯, 乳液聚合, 纳米复合材料

Abstract:

In this work， the surface of reduced graphene oxide （RGO） was modified with diethylaminoethyl methacrylate （DEAM） and then dispersed in an MMA monomer. The PMMA/DEAM-RGO nanocomposites were prepared by emulsion polymerization， and their structure and properties were investigated using Fourier-transform infrared spectrometer， Raman spectrometer， scanning electron microscope， transmission electron microscope， X-ray diffractometer， differential scanning calorimeter and thermogravimetric analyzer. The results indicated that RGO was completely covered by PMMA with the aid of DEAM and thus achieved a uniform dispersion in the PMMA matrix. The experiments also confirmed that there was a strong interaction between the DEAM amine groups and surface the functional groups on the RGO surface. The modified RGO could act as a physical cross-linking point in the PMMA matrix. This led to an increase in the toughness and strength of PMMA/RGO nanocomposites with an increase in the amount of modified RGO. Moreover， the thermal stability and antistatic properties of the nanocomposites were also improved.

Key words: polymethyl methacrylate, reduced graphene oxide, emulsion polymerization, nanocomposite