利用纳米Mo改善液态金属基SiC/石墨烯混合纳米流体分散性与流动性

doi:10.11896/cldb.24030153

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Abstract Facing the long-standing challenges of poor dispersion and flowability in liquid metal-based nanofluids, we propose to use the extremely high surface energy of Mo nanoparticles to improve the interaction energy relationship between liquid metal and non-metal mixed nanoparticles. This method can enhance the dispersion and flowability of liquid metal-based hybrid nanofluids. Theoretical analysis confirmed the energy barrier changes caused by the weak alloying of Mo nanoparticles with liquid metal at a short characteristic distance of 0.2—0.4 nm, as well as the “capture” mechanism of SiC/graphene mixed nanoparticles. Wettability experiments and “capture” experiments were designed to validate this mec-hanism. The interaction between Mo nanoparticles and mixed nanoparticles in liquid metal was analyzed in a long characteristic distance range of 0.4—10 nm, and the dispersion behavior by the repulsive positive van der Waals potential was observed. A liquid metal-based SiC/graphene hybrid nanofluid was prepared using Ga_68.5In_21.5Sn₁₀ as the base fluid, SiC nanoparticles and physically prepared graphene as the dispersed phase, and Mo nanoparticles as the intermediate. A vacuum melting furnace was used for electromagnetic heating to prepare the liquid metal-based SiC/graphene hybrid nanofluid. SEM+EDS and a specially designed high-temperature rheometer were combined to analyze the differences in basic properties between the novel prepared sample and the sample prepared by traditional oxidation method. The results indicate that the sample prepared by the new method has better dispersion, conductivity, thermal conductivity, and flowability, and has a slower temperature rise in gear pumps.

Key words： liquid metal hybrid nanofluid dispersion flowability energy barrier wettability van der Waals potential

Published: 25 May 2025 Online: 2025-05-13

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TB34

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	Articles by authors
	JIANG Jiajun
	WU Zhangyong
	MENG Xian
	LIU Dazhong
	MU Kunyang
	LIU Wenlong
	ZHU Qichen
	CAI Changli

Cite this article:

JIANG Jiajun,WU Zhangyong,MENG Xian, et al. Improving the Dispersibility and Flowability of Liquid Metal-based SiC/Graphene Hybrid Nanofluids Using Nano Mo[J]. Materials Reports, 2025, 39(10): 24030153-11.

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https://www.mater-rep.com/EN/10.11896/cldb.24030153 OR https://www.mater-rep.com/EN/Y2025/V39/I10/24030153

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