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A morphological study on the migration and selective localization of graphene in the PLA/PMMA blends

机译：石墨烯在PLA / PMMA共混物中的迁移和选择性定位的形态学研究

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Nano-filled polymer blends offer the opportunity to obtain materials with fine-tuned properties. In this work, the dispersion and localization behavior of graphene nanoplate (GNP) and graphene oxide (GO) in solution mixed blends of polylactic acid (PLA) and polymethyl methacrylate (PMMA) were investigated. The blends were prepared by using different mixing sequences to investigate the effect of kinetics parameters and surface chemistry of filler as well as thermodynamics affinity on the localization of fillers. Field Emission Scanning Electron Microscopy (FESEM) and Rheometric Mechanical Spectroscopy (RMS) were employed. In addition, graphene materials were compared by Fourier transform infrared and Raman spectroscopy as well as elemental analysis characterization. Results showed that depending on the mixing sequence, the GNPs were localized in the both phases and interface through migration to reach thermodynamics equilibrium. However, GO localization was significantly affected by the mixing sequence due to better interaction with the polymer phases. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43799.
机译：纳米填充的聚合物共混物提供了获得具有微调性能的材料的机会。在这项工作中，研究了石墨烯纳米板（GNP）和氧化石墨烯（GO）在聚乳酸（PLA）和聚甲基丙烯酸甲酯（PMMA）的溶液混合混合物中的分散和定位行为。共混物是通过使用不同的混合顺序来制备的，以研究动力学参数和填料表面化学性质以及热力学亲和力对填料定位的影响。使用场发射扫描电子显微镜（FESEM）和流变机械光谱学（RMS）。此外，通过傅里叶变换红外和拉曼光谱以及元素分析表征对石墨烯材料进行了比较。结果表明，根据混合顺序，GNPs定位在两个相中，并通过迁移达到热力学平衡。然而，由于与聚合物相的更好的相互作用，GO的位置受混合顺序的影响很大。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43799。

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