Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Seminaryjna 3 Street, 85-326 Bydgoszcz, Poland.
Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B Street, 02-106 Warsaw, Poland.
Molecules. 2023 Apr 11;28(8):3383. doi: 10.3390/molecules28083383.
A large amount of graphene-related research is its use as a filler for polymer composites, including thin nanocomposite films. However, its use is limited by the need for large-scale methods to obtain high-quality filler, as well as its poor dispersion in the polymer matrix. This work presents polymer thin-film composites based on poly(vinyl chloride) (PVC) and graphene, whose surfaces were modified by curcuminoids. TGA, UV-vis, Raman spectroscopy, XPS, TEM, and SEM methods have confirmed the effectiveness of the graphene modification due to π-π interactions. The dispersion of graphene in the PVC solution was investigated by the turbidimetric method. SEM, AFM, and Raman spectroscopy methods evaluated the thin-film composite's structure. The research showed significant improvements in terms of graphene's dispersion (in solutions and PVC composites) following the application of curcuminoids. The best results were obtained for materials modified with compounds obtained from the extraction of the rhizome of L. Modification of the graphene's surface with these compounds also increased the thermal and chemical stability of PVC/graphene nanocomposites.
大量与石墨烯相关的研究都将其作为聚合物复合材料的填充剂，包括薄的纳米复合材料薄膜。然而，其应用受到需要大规模方法获得高质量填充剂以及其在聚合物基体中较差分散性的限制。本工作提出了基于聚氯乙烯（PVC）和石墨烯的聚合物薄膜复合材料，其表面通过姜黄素类化合物进行了改性。TGA、UV-vis、拉曼光谱、XPS、TEM 和 SEM 方法证实了由于π-π相互作用，石墨烯的改性是有效的。通过浊度法研究了石墨烯在 PVC 溶液中的分散情况。SEM、AFM 和拉曼光谱方法评估了薄膜复合材料的结构。研究表明，应用姜黄素类化合物后，石墨烯在溶液和 PVC 复合材料中的分散性有了显著提高。用从根茎中提取的化合物对材料进行改性，得到了最好的结果。这些化合物对石墨烯表面的改性也提高了 PVC/石墨烯纳米复合材料的热稳定性和化学稳定性。
