表面活性剂对水基纳米流体固液相变特性的影响

doi:10.3969/j.issn.0438-1157.2013.09.034

化工学报 ›› 2013, Vol. 64 ›› Issue (9): 3324-3330.DOI: 10.3969/j.issn.0438-1157.2013.09.034

表面活性剂对水基纳米流体固液相变特性的影响

李兴¹, 陈颖¹, 莫松平¹, 贾莉斯²

1. 广东工业大学材料与能源学院, 广东广州 510006;
2. 重庆大学动力工程学院, 重庆 400044

收稿日期:2013-01-10 修回日期:2013-04-01 出版日期:2013-09-05 发布日期:2013-09-05
通讯作者: 陈颖
作者简介:李兴(1988- ),男,硕士研究生。
基金资助:
国家自然科学基金项目(51106031);国家自然科学基金-广东联合资助项目(U0934006);广东省教育部产学研结合项目(2011B090400374)。

Influence of surfactant on characteristics of solid-liquid phase change for water-based nanofluid

LI Xing¹, CHEN Ying¹, MO Songping¹, JIA Lisi²

1. School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;
2. School of Power Engineering, Chongqing University, Chongqing 400044, China

Received:2013-01-10 Revised:2013-04-01 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the National Natural Science Foundation of China(51106031).

摘要/Abstract

关键词: 水基纳米流体, 表面活性剂, 吸附结构, 过冷度

Abstract: Surfactant was used in the study to help dispersing TiO₂ nanoparticles in deionized water.The effects of different surfactants(sodium dodecyl benzene sulfonate(SDBS),polyvinylpyrrolidone(PVP)and cetyl trimethyl ammonium bromide(CTAB))on the dispersion stability and solid-liquid phase transition of TiO₂-H₂O nanofluids were investigated.Surfactants SDBS and PVP significantly enhanced the dispersion stability of TiO₂-H₂O nanofluid,and reduced its degree of supercooling by about 37.02% and 9.65%,respectively.Whereas,surfactant CTAB showed no effect on improving the dispersion stability of TiO₂-H₂O nanofluid,and even worse,increased the degree of supercooling of nanofluid by about 6.11%.The adsorption structures of SDBS,PVP and CTAB were analyzed by measuring the adsorbent layer thickness on TiO₂ nanoparticles(X-ray photoelectron spectroscopy).The adsorption structures of surfactants SDBS and PVP were hydrophilic while that of surfactant CTAB was micellar,which could explain the above phenomena.In addition,all three surfactants were found to extend the phase transition time of TiO₂-H₂O nanofluid due to the decrease in the thermal conductivity of nanofluid.

Key words: water-base nanofluid, surfactant, adsorption structure, degree of supercooling

中图分类号:

TB61⁺1

李兴, 陈颖, 莫松平, 贾莉斯. 表面活性剂对水基纳米流体固液相变特性的影响[J]. 化工学报, 2013, 64(9): 3324-3330.

LI Xing, CHEN Ying, MO Songping, JIA Lisi. Influence of surfactant on characteristics of solid-liquid phase change for water-based nanofluid[J]. CIESC Journal, 2013, 64(9): 3324-3330.

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表面活性剂对水基纳米流体固液相变特性的影响

Influence of surfactant on characteristics of solid-liquid phase change for water-based nanofluid

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