Enhanced thermal conductivity of nanofluid-based ethylene glycol containing Cu nanoparticles decorated on a Gr–MWCNT hybrid material. Issue 1 (23rd December 2016)

• Record Type: Journal Article
• Authors: Van Trinh, Pham; Anh, Nguyen Ngoc; Thang, Bui Hung; Quang, Le Dinh; Hong, Nguyen Tuan; Hong, Nguyen Manh; Khoi, Phan Hong; Minh, Phan Ngoc; Hong, Phan Ngoc
• Is Part Of: RSC advances. Volume 7:Issue 1(2017)
• Page Start: 318
• Page End: 326
• Publication Date: 2016-12-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra25625b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : High thermal conductivity was obtained for nanofluid-based EG containing Cu nanoparticle-decorated Gr–MWCNT hybrid material synthesized by chemical reduction. Abstract : In this study, nanofluid based ethylene glycol (EG) containing Cu nanoparticles decorated on a Gr–MWCNT hybrid material (Gr–MWCNT/Cu) was synthesized successfully for the first time via a chemical reduction method. The SEM, HRTEM, FTIR and XRD studies revealed that Cu nanoparticles with an average diameter of 18 nm were well decorated on the surface of both MWCNTs and graphene sheets. The nanofluids containing Gr–MWCNT/Cu material showed good stability and a maximum thermal conductivity enhancement of 41% at 60 °C for the nanofluid containing 0.035 vol% material compared to EG alone. The enhancement is due to the combination of the high thermal conductivity of graphene, CNT and Cu nanoparticles as well as the higher surface area of the Gr–MWCNT/Cu hybrid structure. Experimental results of thermal conductivity were evaluated using different theoretical models, amongst which the Hamilton–Crosser model was found suitable for predicting the thermal conductivity of the nanofluid.