한국전산유체공학회:학술대회논문집
- 2008.03b
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- Pages.538-541
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- 2008
Characterization of carbon nanofluids applicable to heat transfer fluids
열전달 유체 적용을 위한 카본 나노유체 특성 분석
- Kim, Doo-Hyun (Pusan Nationl University, Department of Mechanical Engineering) ;
- Hwang, Yu-Jin (Pusan Nationl University, Department of Mechanical Engineering) ;
- Kwon, Yeoung-Hwan (Pusan Nationl University, Department of Mechanical Engineering) ;
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Lee, Jae-Keun
(Pusan Nationl University, Department of Mechanical Engineering)
;
- Hong, Dae-Seung (N-BARO TECH CO) ;
- Moon, Seong-Young (N-BARO TECH CO) ;
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Kim, Soo-H.
(Pusan Nationl University, Department of Nanosystem and Nanoprocess Engineering)
- Published : 2008.03.26
Abstract
The carbon laden suspensions in water with no surfactants have poor stability caused by the hydrophobic layer of particles. In this study, the water-based carbon nano colloide(CNC) was successfully produced using electro-chemical one-step method without agent. The properties of CNC were characterized by using various techniques such as particle size analyzer, TEM, FT-IR, turbidity meter, viscometer, and transient hot-wire method. The average size of the suspended in the CNC was 15 nm in diameter. The thermal conductivity of CNC compared with water was increased up to 14% with 4.2wt% concentration. The CNC was stable over 600hr. The enhanced colloidal stability of CNC may be caused by the chemical structures, such as, hydroxide and carboxyl groups formed in outer atomic layer of carbon, which (i) made the carbon nanofparticles hydrophilic and (ii) prevented the aggregation among nanoparticles.