不同类型表面活性剂对纳米SiO2流体粘度的影响

doi:10.3724/SP.J.1095.2014.30623

摘要/Abstract

摘要： 系统地研究了不同类型的表面活性剂对低浓度纳米SiO2流体粘度的影响规律，并在此基础上深入探讨了不同碳链长度的阳离子和非离子表面活性剂对纳米SiO2流体粘度的影响。结果表明，阴离子表面活性剂十二烷基苯磺酸钠（SDBS）对纳米流体粘度的影响较小，其相对粘度值维持在1.23左右；而阳离子表面活性剂十四烷基三甲基溴化铵（TTAB）、十六烷基三甲基溴化铵（CTAB）、十八烷基三甲基溴化铵（OTAB）、十六烷基氯化吡啶（CPC）、非离子表面活性剂OP-8、OP-10和两性离子表面活性剂DXS14、DXS18对纳米流体粘度的变化影响较大，其最大相对粘度值分别能达到3.42、1.82和8.87。同时也发现，阳离子表面活性剂碳链越长，纳米流体最高粘度值越大，且纳米流体最高粘度所对应的表面活性剂浓度均在其临界胶束浓度值附近。

关键词: 纳米流体, 表面活性剂, 粘度, 吸附

Abstract: 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.

Key words: nanofluid, surfactant, viscosity, adsorption

中图分类号:

O648.1

宋汝彤, 郭立娟, 郭拥军, 冯茹森, 张新民, 胡俊, 李华兵. 不同类型表面活性剂对纳米SiO₂流体粘度的影响[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30623.

SONG Rutong1,2, GUO Lijuan1,3, GUO Yongjun1,2,4*, FENG Rusen1,2, ZHANG Xinmin1,4, HU Jun4, LI Huabing4. Effect of Surfactants on the Viscosity of Nano-SiO₂ Fluids[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30623.

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不同类型表面活性剂对纳米SiO₂流体粘度的影响

Effect of Surfactants on the Viscosity of Nano-SiO₂ Fluids

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