原子层沉积表面改性碳纳米球和碳纳米粉纳米流体的热导率增强

Thermal Conductivity Enhancement of Atomic Layer Deposition Surface-Modified Carbon Nanosphere and Carbon Nanopowder Nanofluids.

作者信息

Bohus Marcell, Ba Thong Le, Hernadi Klara, Gróf Gyula, Kónya Zoltán, Erdélyi Zoltán, Parditka Bence, Igricz Tamás, Szilágyi Imre Miklós

机构信息

Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem Rakpart 3, 1111 Budapest, Hungary.

Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary.

出版信息

Nanomaterials (Basel). 2022 Jun 29;12(13):2226. doi: 10.3390/nano12132226.

DOI:10.3390/nano12132226

PMID:35808062

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9267995/

Abstract

In this paper, we present a study on thermal conductivity and viscosity of nanofluids containing novel atomic layer deposition surface-modified carbon nanosphere (ALD-CNS) and carbon nanopowder (ALD-CNP) core-shell nanocomposites. The nanocomposites were produced by atomic layer deposition of amorphous TiO. The nanostructures were characterised by scanning (SEM) and transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetry/differential thermal analysis (TG/DTA) and X-ray powder diffraction (XRD). High-concentration, stable nanofluids were prepared with 1.5, 1.0 and 0.5 vol% nanoparticle content. The thermal conductivity and viscosity of the nanofluids were measured, and their stability was evaluated with Zeta potential measurements. The ALD-CNS enhanced the thermal conductivity of the 1:5 ethanol:water mixture by 4.6% with a 1.5 vol% concentration, and the viscosity increased by 37.5%. The ALD-CNS increased the thermal conductivity of ethylene-glycol by 10.8, whereas the viscosity increased by 15.9%. The use of a surfactant was unnecessary due to the ALD-deposited TiO layer.

摘要

在本文中，我们展示了一项关于含有新型原子层沉积表面改性碳纳米球（ALD-CNS）和碳纳米粉（ALD-CNP）核壳纳米复合材料的纳米流体的热导率和粘度的研究。这些纳米复合材料是通过非晶TiO的原子层沉积制备的。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能量色散X射线分析（EDX）、傅里叶变换红外光谱（FT-IR）、拉曼光谱、热重/差热分析（TG/DTA）和X射线粉末衍射（XRD）对纳米结构进行了表征。制备了纳米颗粒含量为1.5%、1.0%和0.5%（体积分数）的高浓度稳定纳米流体。测量了纳米流体的热导率和粘度，并通过Zeta电位测量评估了它们的稳定性。在浓度为1.5%（体积分数）时，ALD-CNS使1:5乙醇:水混合物的热导率提高了4.6%，粘度增加了37.5%。ALD-CNS使乙二醇的热导率提高了10.8%，而粘度增加了15.9%。由于通过原子层沉积的TiO层，无需使用表面活性剂。