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Studies of surface functional modification of nanosized α-alumina
- Source :
-
Powder Technology . Sep2007, Vol. 178 Issue 3, p203-207. 5p. - Publication Year :
- 2007
-
Abstract
- Abstract: Surface functional modification of nanosized α-alumina is an effective way to improve its dispersion in polymer and to enhance interfacial agglutinate force between particles and polymer. In this paper, diphenylmathane-4,4''-diisocyanate(MDI) was used as a surface grafting agent to react with the hydroxyl group on the surface of nanosized α-alumina. The surface properties of the grafted α-alumina were studied by FT-IR spectra X-ray photoelectron spectroscopy(XPS), surface tensiometer and transmission electron microscope (TEM). It was found that the reaction between the isocyanate group and the hydroxyl group on the surface of α-alumina nanoparticles was attribute to additional reaction of the double bond between C and N in the isocyanate group. The surface of MDI grafted α-alumina nanoparticles showed an extremely hydrophobic property and good dispersibility in ethanol. The most important influence was that there was a quantity of isocyanate groups with an active chemical property on the surface of the grafted particles, which could readily react with compounds containing –OH, –NH2 or –COOH groups. [Copyright &y& Elsevier]
- Subjects :
- *ALUMINUM oxide
*SPECTRUM analysis
*POLYMERS
*NANOPARTICLES
Subjects
Details
- Language :
- English
- ISSN :
- 00325910
- Volume :
- 178
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Powder Technology
- Publication Type :
- Academic Journal
- Accession number :
- 26336518
- Full Text :
- https://doi.org/10.1016/j.powtec.2007.04.020