Ghaemi Ferial, Abdullah Luqman Chuah, Tahir Paridah
Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), 43400 Serdang, Malaysia.
Department of Chemical and Environmental Engineering, Universiti Putra Malaysia (UPM), 43400 Serdang, Malaysia.
Polymers (Basel). 2016 Nov 9;8(11):381. doi: 10.3390/polym8110381.
This paper focuses on the synthesis and mechanism of carbon nanospheres (CNS) coated with few- and multi-layered graphene (FLG, MLG). The graphitic carbon encapsulates the core/shell structure of the Ni/NiO nanoparticles via the chemical vapor deposition (CVD) method. The application of the resulting CNS and hybrids of CNS-FLG and CNS-MLG as reinforcement nanofillers in a polypropylene (PP) matrix were studied from the aspects of mechanical and thermal characteristics. In this research, to synthesize carbon nanostructures, nickel nitrate hexahydrate (Ni(NO₃)₂·6H₂O) and acetylene (C₂H₂) were used as the catalyst source and carbon source, respectively. Besides, the morphology, structure and graphitization of the resulting carbon nanostructures were investigated. On the other hand, the mechanisms of CNS growth and the synthesis of graphene sheets on the CNS surface were studied. Finally, the mechanical and thermal properties of the CNS/PP, CNS-FLG/PP, and CNS-MLG/PP composites were analyzed by applying tensile test and thermogravimetric analysis (TGA), respectively.
本文聚焦于包覆有少层和多层石墨烯（FLG、MLG）的碳纳米球（CNS）的合成及其机理。通过化学气相沉积（CVD）法，石墨化碳包裹了Ni/NiO纳米颗粒的核壳结构。从机械和热性能方面研究了所得CNS以及CNS-FLG和CNS-MLG杂化物作为增强纳米填料在聚丙烯（PP）基体中的应用。在本研究中，分别使用六水合硝酸镍（Ni(NO₃)₂·6H₂O）和乙炔（C₂H₂）作为催化剂源和碳源来合成碳纳米结构。此外，还研究了所得碳纳米结构的形态、结构和石墨化程度。另一方面，研究了CNS的生长机理以及CNS表面石墨烯片的合成。最后，分别通过拉伸试验和热重分析（TGA）对CNS/PP、CNS-FLG/PP和CNS-MLG/PP复合材料的机械和热性能进行了分析。
