Citation:
SONG Rutong, GUO Lijuan, GUO Yongjun, FENG Rusen, ZHANG Xinmin, HU Jun, LI Huabing. Effect of Surfactants on the Viscosity of Nano-SiO2 Fluids[J]. Chinese Journal of Applied Chemistry,
;2014, 31(9): 1083-1088.
doi:
10.3724/SP.J.1095.2014.30623
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The effect of surfactants on the viscosity of low concentration nano-SiO2 fluids was studied. Specifically, we studied the effect of different carbon chain lengths of cationic and nonionic surfactants for the nano-SiO2 fluids viscosity. The results show that the anionic surfactant of sodium dodecyl benzene sulfonate(SDBS) has a slight effect on the viscosity of nanofluids, it's relative viscosity value maintaining of about 1.23; while the cationic surfactants of tetradecyl trimethyl ammonium bromide(TTAB), cetyl trimethyl ammonium bromide(CTAB), octadecyl trimethyl ammonium bromide(OTAB), cetyl chloride pyridinium(CPC), nonionic surfactants of OP-8, OP-10, zwitterionic surfactants of DXS14, DXS18 have a greater influence on the viscosity, and it's maximum relative viscosity values can reach 3.42, 1.82 and 8.87, respectively, have a greater influence on the viscosity. At the same time, we found that the longer carbon chain in cationic surfactants, the greater the viscosity of nanofluids. The highest viscosity of nanofluids is obtained at the concentration of the surfactants near the critical micelle concentration value.
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Keywords:
- nanofluid,
- surfactant,
- viscosity,
- adsorption
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