Plasma Treatment of Nanoparticles for Nanofluids

Plasma treatment of nanoparticles for nanofluids can be obtained by plasma treatment using low-temperature plasmas. The diamond nanoparticle surfaces, for example, can be modified by the low-temperature plasmas of methane and oxygen mixtures, which can improve their dispersion characteristics including dispersibility and suspension stability in water for nanofluid. Plasma treatment of diamond nanoparticles with selected plasma chemistry imparted various functional groups on the particle surfaces and tailored... 

Plasma treatment of nanoparticles for nanofluids can be obtained by plasma treatment using low-ten5)erature plasmas. The diamond nanoparticle surfaces, for example, can be modified by the low-temperature plasmas of methane... 

Plasma Treatment of Nanoparticles for Nanofluids, Figure 2 Schematic diagram of the magneticaiiy assisted fiuidized bed plasma reactor system... 

Plasma Treatment of Nanopartides for Nanofluids, Rgure 6 Contad angle change of diamond nanoparticles with plasma treatment time. Plasma treatment conditions were 60 mtom pressure, 4 W RF power... 

Plasma Treatment of Nanopardcles for Nanofluids, Table 1 The contact angle (9) and Its suface energy of untreated and treated (CH4 02 = 1 1, 60 mtorr, 4 W RF power) diamond nanoparticles. Surface energy of each solvent is = 71,99, yf = 23.46, = 17,89. and y are the surface... 

Plasma Treatment of Nanoparddes for Nanofluids, Hguie 9 Plasma treatment time effects on thermal conductivity of the resulting nanofluids with addition of 0.15 Vol.% plasma treated diamond nanoparticles into water. The thermal conductivities were measured after 1.0 h settling time. Plasma treatment conditions were 60 mtorr pressure, 4 W RF power, 1 1 ratio of CH4 O2... 

Plasma Treatment of Nanoparticles and Carbon Nanotubes for Nanofluids Powder Blasting... 

Plasma treatment provides a new approach to functionalize nanoparticle and nanotube surface for heat transfer nanofluid preparation without using stabilizing agents. More experimental investigation is very necessary to optimize the plasma treatment process in terms of plasma chemistry, plasma operating conditions, and proper plasma apparatus design. As pointed out in this entry, besides nanoparticle and nanotube concentration, the enhanced interfacial interactions between nanoparticles and/or carbon nanotubes with base fluids could be another important factor that contributed to the thermal conductivity increase observed in heat transfer nanofluids. A detailed characterization of the nanofluids with the aid of theoretical simulations will help us to understand the fundamental mechanisms for the observed heat transfer enhancement. 

---