The influence of gold nanoparticles on the thermal conductivity of water solutions of graphen
hereinafter graphene, nanoparticles, thermal conductivity
The objects of study were water dispersions of raw graphene (hereinafter referred to as graphene-n), higher degree of purification of graphene samples (hereinafter graphene), and nanoparticles of graphene-Au nanoparticles based on them.
The thermal conductivity of water graphene dispersions and water dispersions of gold graphene nanoparticles nanostructures at different temperatures and component ratios was investigated. The values of effective thermal conductivity of dry nanofillers are calculated. The temperature dependences of the thermal conductivity of the nanofillers were obtained. It is found that the in-thermal conductivity of water dispersions of purified graphene is higher than the thermal conductivity of raw graphene as a result of better packing of nanoparticles in pure graphene nanofillers compared to raw. The effect of enhancement of thermal conductivity of gold nanoparticles, which is accompanied by higher absolute values of thermal conductivity of nanoparticles of graphene-nanoparticles of gold than the corresponding graphene, was revealed. At the same time, there is a significant difference in thermal conductivity between nanoparticles of graphene nanoparticles of gold.
It is established that higher values of thermal conductivity of graphene-nanoparticles nanostructures of gold are the result of the reinforcing action of a gold nanoparticle substrate, which is formed as a result of joint sedimentation with graphene during the formation of nano-flakes from water solution during evaporation of water.
2. Shahil К.М., Balandin A. Thermal properties of graphene and multilayer graphene: Application in thermal interfase materials // Solid State Communications.–2012. – Vol.152. P. 1331 - 1340.
3. Song Yu., Yang Ch., Liu D., Lin Y., Nan C.W.Self-orientation of graphite-nanoplates induces anisotropy ofnanoplates-epoxy composites // Ceramics International. – 2012. – Vol. 38. – P. 591 – 594.
4. Khalil I.,Rahmati Sh., Muhd N., Wageeh J.Graphene metal nanocomposites // Recent progress in electrochemical biosensing applications // Journal of Industrial and Engineering Chemistry. – 2018. – Vol. 59. – P. 425 – 439.
5. Waszkielis K.M., Białobrzewski I., Nowak K.W., Dzadz Ł., Dach J. Determination of the thermal conductivity of composed material // Measurement. – 2014. – Vol.58. – P. 441 - 447.
6. Xu H., Wu X., Li X. et. al. Properties of graphene-metal contacts probed by Raman spectroscopy // Carbon. – 2018. – Vol. 127. – P. 491 - 497.
7. ZhouL., WangH., ZhangJ.Study on the synthesis and surface enhanced Raman spectroscopy of graphene-based nanocomposites decorated with noble metal nanoparticles // Colloids and Surfaces A: Physicochemical and Engineering Aspects. –2013. – Vol. 430. – P. 103 - 109.
8. Korskanov V.V., Karpova I.L., Ruhaylo M.V. et.al. Calorimetric module for studying the thermophysical properties of composite materials // Ceramics: science and life. - 2016. №3(32). - Р. 5 - 15.
9. Wunderlich B. Thermal Analysis of Materials//Springer.– 2005. – 907 p.
10. Kaye G.w., Laby T.H. Tables of Physical and Chemical Constants // LONGMANS GREEN & Сo, London,New York, Toronto. - 1962. - 248 p.
11. Chu K., Wang X., Li Y. et. al. Thermal properties of graphene/metal composites with aligned graphene // Materials and Design. – 2018. – Vol. 140. – P. 85 - 94.
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