Preparation and Thermal Conductivity of Alumina/Reduced Graphene Oxide Composite Dispersed Aqueous Nanofluids

4th Annual International Workshop on Materials Science and Engineering

Yang, Guoqiang^1 ; Yu, Xiaofeng^1 ; Wu, Qibai^1 ; Zhang, Haiyan^1,2 ; Li, Wenwu^1 ; Qian, Yannan^1,2

School of Materials and Energy, Guangdong University of Technology, Guangzhou

510006, China^1

GuangDong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou

510006, China^2

关键词: Crystal phase structure;    Nanofluids;    Oxide composites;    Solvothermal reactions;    Suspension stability;    Two-step process;    Ultra-sonication;    Water based;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012071/pdf
DOI  :  10.1088/1757-899X/381/1/012071

来源: IOP

【 摘 要 】

Alumina/reduced graphene oxide composite dispersed aqueous nanofluids with various concentrations have been synthesized successfully by a two-step process: synthesis of Al2O3/rGO composite via solvothermal reaction method and preparation water-based nanofluids through ultrasonication treatment. The crystal phase structure and morphology of the prepared composite have been characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The suspension stability and thermal conductivity of as prepared Al2O3/rGO-water nanofluids with different composite concentration have been studied in detail. The overall value of thermal conductivity increases along with increasing concentration at various temperatures, indicating potential application for heat transfer field.