Statistical analysis of thermal conductivity of nanofluid containing decorated multi-walled carbon nanotubes with TiO2 nanoparticles

• Published in: Bulletin of materials science Vol. 37; no. 6; pp. 1439 - 1445
• Main Authors: Abbasi, Sedigheh, Zebarjad, Seyed Mojtaba, Baghban, Seyed Hossein Noie, Youssefi, Abbas
• Format: Journal Article
• Language: English
• Published: India Springer India 01.10.2014; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Design factors; Engineering; Heat transfer; Materials Science; Multi wall carbon nanotubes; Nanofluids; Nanoparticles; Oxidation; Statistical analysis; Thermal conductivity; Titanium dioxide; Transmission electron microscopy; MWCNT; nanoparticles; TiO; thermal conductivity; nanofluid
• ISSN: 0250-4707; 0973-7669
• DOI: 10.1007/s12034-014-0094-2

In this paper, we report for the first time the statistical analysis of thermal conductivity of nanofluids containing TiO 2 nanoparticles, pristine MWCNTs and decorated MWCNTs with different amounts of TiO 2 nanoparticles. The functionalized MWCNT and synthesized hybrid of MWCNT-TiO 2 were characterized using transmission electron microscopy (TEM). TEM image confirmed that the ends of MWCNTs were opened during their oxidation of them in HNO 3 and TiO 2 nanoparticles successfully attach to the outer surface of oxidized MWCNTs. Thermal conductivity measurements of nanofluids were analysed via two-factor completely randomized design and comparison of data means is carried out with Duncan’s multiple-range test. Statistical analysis of experimental data show that temperature and weight fraction have a reasonable impact on the thermal conductivity of all tested nanofluids ( α = 0.05). The results also show that increased temperature and weight fraction leads to the increased thermal conductivity.