Study of synthesis, stability and thermo-physical properties of graphene nanoplatelet/platinum hybrid nanofluid

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• 作者：Hooman Yarmand^a ; ^{hooman_yarmand@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Samira Gharehkhani^a ; ^{s_gharahkhani_248@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Seyed Farid Seyed Shirazi^a ; Marjan Goodarzi^b ; Ahmad Amiri^a ; Wail Sami Sarsam^a ; ^c ; Maryam Sadat Alehashem^d ; Mahidzal Dahari^a ; S.N. Kazi^a ; ^{salimnewaz@um.edu.my" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Graphene nanoplatelet (GNP) ; GNP&ndash ; Pt nanocomposite ; Hybrid nanofluid ; Thermo-physical property
• 刊名：International Communications in Heat and Mass Transfer
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：77
• 期：Complete
• 页码：15-21
• 全文大小：870 K

文摘

In the present study a new synthesis method has been introduced for the decoration of platinum (Pt) on the functionalized graphene nanoplatelet (GNP) and also highlighted the preparation method of nanofluids. GNP–Pt uniform nanocomposite was produced from a simple chemical reaction procedure, which included acid treatment for functionalization of GNP. The surface characterization was performed by various techniques such as XRD, FESEM and TEM. The effective thermal conductivity, density, viscosity, specific heat capacity and stability of functionalized GNP–Pt water based nanofluids were investigated in different instruments. The GNP–Pt hybrid nanofluids were prepared by dispersing the nanocomposite in base fluid without adding any surfactant. The examined nanofluids were stable and no significant sedimentation was observed for a long time (22 days). Thermal conductivity of GNP–Pt nanocomposite dispersed in distilled water nanofluids shows an enhancement of 17.77% at 40 °C and 0.1% weight concentration.