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[1] Yang Liu, Du Kai, Zhang Xiaosong, Niu Xiaofeng, et al. Preparation and stability of zinc ferrite nano-particle suspensionof ammonia-water solution [J]. Journal of Southeast University (English Edition), 2010, 26 (2): 368-371. [doi:10.3969/j.issn.1003-7985.2010.02.050]
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Preparation and stability of zinc ferrite nano-particle suspensionof ammonia-water solution()
铁酸锌-氨水纳米流体的制备及稳定性
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
26
Issue:
2010 2
Page:
368-371
Research Field:
Energy and Power Engineering
Publishing date:
2010-06-30

Info

Title:
Preparation and stability of zinc ferrite nano-particle suspensionof ammonia-water solution
铁酸锌-氨水纳米流体的制备及稳定性
Author(s):
Yang Liu1;  Du Kai1;  Zhang Xiaosong1;  Niu Xiaofeng1;  2
1School of Energy and Environment, Southeast University, Nanjing 210096, China
2Department of Building Services Engineering, the Hong Kong Polytechnic University, Hong Kong, China
杨柳1;  杜垲1;  张小松1;  牛晓峰1;  2
1东南大学能源与环境学院, 南京210096; 2香港理工大学屋宇设备工程学系, 中国香港
Keywords:
nanofluid;  stability;  surfactant;  ammonia water
纳米流体;  稳定性;  表面活性剂;  氨水
PACS:
TB61+1
DOI:
10.3969/j.issn.1003-7985.2010.02.050
Abstract:
In order to apply nano-particles to the ammonia-water absorption refrigeration, the zinc ferrite nano-particles suspension of ammonia-water solution with the mixed surfactants of sodium dodecyl benzene sulfonate(SDBS)and cetyl trimethyl ammonium bromide(CTAB)is prepared.A series of experiments is performed to investigate the stability of the prepared nanofluid with different contents and proportions of surfactants, different durations of ultrasonic wave vibration and different durations of illumination.The optimal dispersion conditions are 1.5% SDBS, 0.015% CTAB(mass fraction), 30 min of ultrasonic vibration and over 72 h of illumination.Finally, based on double electrode layer theory, the influences of the content of the surfactants on the stability of nanofluid are analyzed.The existence of the optimal surfactant content is proved, which is in accordance with the experimental results.
为了将纳米颗粒的强化传热吸收作用应用于氨水吸收制冷中, 提出了在氨水溶液中添加铁酸锌纳米颗粒和复配阴/阳离子表面活性剂SDBS和 CTAB的纳米流体的配制方法, 并对其稳定性进行了实验研究.研究了阴阳离子活性剂质量分数、复配比例及超声分散和光照对稳定性的影响, 确定了铁酸锌-氨水纳米流体分散的最佳工艺为:SDBS质量分数为 1.5%, CTAB质量分数为0.015%, 超声时间为30 min, 光照时间 72 h以上.最后根据双电层原理分析了活性剂质量分数对悬浮液稳定性的影响, 表明存在最佳活性剂质量分数, 并与实验结果相符.

References:

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[2] Kim Jin-Kyeong, Jung Jun Young, Kang Yong Tae.The effect of nano-particles on the bubble absorption performance in a binary nanofluid [J].Int J Refrigeration, 2006, 29(1): 22-29.
[3] Kang Yong Tae, Lee Jin-Ki, Kim Bum-Chan.Absorption heat transfer enhancement in binary nanofluids [C]//International Congress of Refrigeration 2007.Beijing, 2007: ICR07-B2-371.(in Chinese)
[4] Cheng Bo, Du Kai, Zhang Xiaosong, et al.Influence of stability of carbon black nano-particle suspension of ammonia solution [J].Journal of Chemical Industry and Engineering, 2008, 59(S2):49-52.(in Chinese)
[5] Zhou Lihong, Fang Yun, Lü Shuanshuo.Mixing behaviors and application of anionic-cationic surfactant[J].China Surfactant Detergent & Cosmetics, 2001, 31(5): 37-40.(in Chinese)
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Memo

Memo:
Biographies: Yang Liu(1984—), male, graduate;Du Kai(corresponding author), male, professor, du-kai@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.50876020).
Citation: Yang Liu, Du Kai, Zhang Xiaosong, et al.Preparation and stability of zinc ferrite nano-particle suspension of ammonia-water solution[J].Journal of Southeast University(English Edition), 2010, 26(2):368-371.
Last Update: 2010-06-20