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Citation
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HERO ID
4707243
Reference Type
Journal Article
Title
Synthesis and surface modification of aluminum oxide nanoparticles
Author(s)
Lashanizadegan, M; Farzi, G; Nia, NE
Year
2014
Is Peer Reviewed?
Yes
Journal
Journal of Ceramic Processing Research
ISSN:
1229-9162
Publisher
Hanyang University
Volume
15
Issue
5
Page Numbers
316-319
Language
English
Web of Science Id
WOS:000346117100010
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84916218158&partnerID=40&md5=e942bd71edc219e98bfea58ab8e16a74
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Abstract
Nano precursor of aluminum hydroxide was synthesizes by direct precipitation from aluminum nitrate and sodium hydroxide in the presence of polyethylene glycol. Al2O3 nanoparticles (AON) were prepared by calcinations of the precursor at 850 degrees C for 10 h. Aluminum oxide nanoparticles with average diameter of about (23 nm) were modified with oleic acid (OA-AON) as coupling agent. Successful surface modification of nanoparticles allows them to form stable dispersions and prevents aggregation of the nanoparticles. Then dispersibility of surface modified nanoparticles was examined in some monomers with different levels of hydrophobicity, including methylmetacrylate (MMA) butylacrylate (BuA) and Styrene (ST) having low, medium high hydrophobicity, respectively. To examine their dispensability, aluminum oxide were dispersed in mentined monomers, then Al2O3 loaded monomers were allowed to stand at room temperature for 24 h and the precipitate part of nanoparticles was separated and the amount of stable particles in dispersion was determined. The morphology and structures of nanoparticles were characterized by FT-IR, UV/VIS, X-ray diffraction (XRD) and scanning electron microscopy (SEM). These characterizations confirmed grafting of coupling agent on the surface of aluminum oxide nanoparticles, and showed that the surface modification of nanoparticles has been carried out successfully, so that their surface is rendered more hydrophobic.
Keywords
Aluminum oxide; Oleic acide; Surface modification; Dispersion
Tags
IRIS
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Nitrate/Nitrite
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WoS
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