Stability and Agglomeration of Alumina Nanoparticles in Ethanol-Water Mixtures

被引：43
作者：
Ilyas, Suhaib Umer [1 ]
Pendyala, Rajashekhar [1 ]
Marneni, Narahari [2 ]
机构：
[1] Univ Teknol PETRONAS, Dept Chem Engn, Bandar Seri Iskandar 32610, Perak Darul Rid, Malaysia
[2] Univ Teknol PETRONAS, Dept Petr Engn, Bandar Seri Iskandar 32610, Perak Darul Rid, Malaysia
来源：
PROCEEDING OF 4TH INTERNATIONAL CONFERENCE ON PROCESS ENGINEERING AND ADVANCED MATERIALS (ICPEAM 2016) | 2016年 / 148卷
关键词：
nanofluids; sedimentation; agglomeration; sonication; stability; HEAT-TRANSFER CHARACTERISTICS; THERMAL-CONDUCTIVITY; SEDIMENTATION; NANOFLUIDS; AGGREGATION;
D O I：
10.1016/j.proeng.2016.06.616
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanofluids have gained much attention in the last decade due to wide range of engineering applications. Agglomeration among nanoparticles in nanosuspensions accelerates settling of nanoparticles due to gravity and reduces overall thermal conductivity of nanofluid. Settling characteristics of alumina nanoparticles in six different concentrations in different proportions of ethanol and water mixtures are studied. Surfactant free nanofluids are prepared with Alumina nanoparticles of average diameter 40 nm, 50 nm and 100 nm using two-step method. Settling behaviour of nanoparticles in nanosuspensions is observed under natural and sonicated conditions. Photographic technique is used to measure sediment height in a batch sedimentation apparatus. Heights of the sediments are observed for 24 hours with and without sonication at room temperature. It is found that sonication has significant influence on the stability of nanofluids. Effect of ethanol concentration on the sediment ratio is studied with and without sonication. Aggregation among nanoparticles and interaction of particles with fluid mixtures are investigated by performing various analyses such as Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and particle size analyser. (C) 2016 The Authors. Published by Elsevier Ltd.
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收藏
页码：290 / 297
页数：8
相关论文
共 24 条
[1]   Investigating the use of nanofluids to improve high heat flux cooling systems [J].
Barrett, Thomas R. ;
Robinson, S. ;
Flinders, K. ;
Sergis, A. ;
Hardalupas, Y. .
FUSION ENGINEERING AND DESIGN, 2013, 88 (9-10) :2594-2597
[2]   Preparation of superhydrophobic PET fabric from Al2O3-SiO2 hybrid: geometrical approach to create high contact angle surface from low contact angle materials [J].
Damayanti, N. P. .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2010, 56 (01) :47-52
[3]   Enhancement of heat transfer using nanofluids-An overview [J].
Godson, Lazarus ;
Raja, B. ;
Lal, D. Mohan ;
Wongwises, S. .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2010, 14 (02) :629-641
[4]   Shelf stability of nanofluids and its effect on thermal conductivity and viscosity [J].
Haghighi, E. B. ;
Nikkam, N. ;
Saleemi, M. ;
Behi, M. ;
Mirmohammadi, S. A. ;
Poth, H. ;
Khodabandeh, R. ;
Toprak, M. S. ;
Muhammed, M. ;
Palm, B. .
MEASUREMENT SCIENCE AND TECHNOLOGY, 2013, 24 (10)
[5]   Effects of aggregation on the thermal conductivity of alumina/water nanofluids [J].
Hong, Jonggan ;
Kim, Dongsik .
THERMOCHIMICA ACTA, 2012, 542 :28-32
[6]  
Ilyas S. U., 2014, MATER RES INNOV, V18, DOI DOI 10.1179/1432891714Z.000000000953
[7]   A Review on the Viscous and Thermal Transport Properties of Nanofluids [J].
Ilyas, Suhaib Umer ;
Pendyala, Rajashekhar ;
Shuib, Anis ;
Marneni, Narahari .
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PROCESS ENGINEERING AND ADVANCED MATERIALS 2012-ICPEAM 2012, 2014, 917 :18-27
[8]   Preparation, Sedimentation, and Agglomeration of Nanofluids [J].
Ilyas, Suhaib Umer ;
Pendyala, Rajashekhar ;
Marneni, Narahari .
CHEMICAL ENGINEERING & TECHNOLOGY, 2014, 37 (12) :2011-2021
[9]   Settling Characteristics of Alumina Nanoparticles in Ethanol-Water Mixtures [J].
Ilyas, Suhaib Umer ;
Pendyala, Rajashekhar ;
Marneni, Narahari .
ADVANCED MATERIALS DESIGN AND MECHANICS II, 2013, 372 :143-+
[10]  
Kwak K, 2005, KOREA-AUST RHEOL J, V17, P35
123