Preparation and Characterization of Graphene Oxide-based Natural Hybrids Containing Alfa Fibers or Microcrystalline Cellulose

ABSTRACT

New functional hybrids containing graphene oxide nanosheets (GO) and natural fibers (alfa fibers (AF) or microcrystalline cellulose (MCC)) were successfully produced using simple blending followed by oven drying. Such hybrids offer unique benefits of natural fibers with functionality of graphene oxide. The obtained products have been characterized using different analytical techniques such as Fourier transform infrared (FTIR) and Raman spectroscopies, scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravilmetry (TGA). The morphological analysis revealed that the applied surface treatment of the Alfa fibers (AF) ensured a good distribution of the GO sheets on the fibers surface. It is also demonstrated that the hydrogen bonding interactions between the natural fibers and GO facilitate the dispersion of the latter on the surface of the fibers, producing homogeneous composites (AF/GO) and (MCC/GO). The thermal behavior of the obtained composites is obviously affected by the type of natural fibers. The presence of hemicellulose and lignin in AF slightly decreased the thermal stability of AF/GO hybrid compared to MCC/GO, which presented a better thermal stability. Such hybrids would open up a new way to develop composites with tunable physicochemical properties for various applications.

摘要

通过简单的共混和烘箱干燥，成功地制备了含氧化石墨烯纳米片（GO）和天然纤维（alfa纤维（AF）或微晶纤维素（MCC））的新型功能杂化材料. 这种杂化物具有氧化石墨烯功能的天然纤维的独特优点. 利用傅立叶变换红外光谱（FTIR）和拉曼光谱（Raman）、扫描电子显微镜（SEM）、X射线衍射（XRD）和热重分析（TGA）等分析技术对所得产物进行了表征. 形态分析表明，对Alfa纤维（AF）进行表面处理可以保证GO片在纤维表面的良好分布. 天然纤维与GO之间的氢键作用促进了后者在纤维表面的分散，形成了均匀的复合材料（AF/GO）和（MCC/GO）. 天然纤维的种类对复合材料的热性能有明显的影响. 与MCC/GO相比，半纤维素和木质素的存在使AF/GO的热稳定性略有下降，表现出较好的热稳定性. 这种杂化材料为开发物理化学性能可调的复合材料开辟了一条新的途径.

关键词:

• 氧化石墨烯
• 微晶纤维素
• 阿尔法纤维
• 复合材料
• 混合填料

KEYWORDS:

• Graphene oxide
• microcrystalline cellulose
• alfa fibers
• composites
• hybrid fillers