Role of surface charge, morphology, and adsorbed moieties on thermal conductivity enhancement of nanofluids

被引：8
|
作者：
Angayarkanni, S. Anbumozhi [1 ]
Philip, John [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, SMARTS, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 17期
关键词：
SUSPENSIONS; SCATTERING; NANOTUBES; MICELLES; WATER; SIZE;
D O I：
10.1063/1.4764050
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The role of surface charge, morphology, and adsorbed moieties on thermal conductivity is studied using soft micellar systems and alumina nanofluids of size varying from 2.5 to 30 nm. The thermal conductivity of soft systems of different sizes, surface charges, and morphologies is found to follow effective medium theory of poor thermal conductors. It is observed that the adsorption of surface active moieties on alumina nanoparticles does not lower the enhanced thermal conductivity of nanofluids but significantly enhances the stability and dispersibility of nanomaterials. Further, the cationic and non-ionic surfactants provide optimal thermal to rheological property enhancements. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4764050]
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页数：4
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