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Citation: XUE Ru-Jun, WU Yu-Cheng. Surface Modification of Nano-alumina with Silane Coupling Agent[J]. Chinese Journal of Applied Chemistry, ;2007, 24(11): 1236-1239. shu

Surface Modification of Nano-alumina with Silane Coupling Agent

XUE Ru-Jun ^a,b ,
WU Yu-Cheng ^a,,

1.
a School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009;
2.
b Department of Chemical Engineering, Anhui University of Technology, Huainan

Corresponding author: WU Yu-Cheng,
Received Date: 19 December 2006
Available Online: 3 April 2007
Fund Project: 国家自然科学基金(20571022) (20571022)教育部博士点基金(20060359011) (20060359011)合肥工业大学中青年创新群体基金(103-037016)资助项目 (103-037016)

Silane coupling agent KH570 was hydrolyzed in alcohol with acid solution as a catalyst. Then nanoalumina was modified with it by wet surface modification. The rate of coverage of the coupling agent was determined by roasting method. The hydrolysis conditions of KH570 and their influence on the coupling effect were investigated. It was found that the hydrolysis conditions such as the acid used had important influence on the coupling, and the proper hydrolysis conditions of the silane coupling agent were: oxalic acid as the catalyst, pH 3~4, hydrolysis at room temperature for 1 h. The proper processing conditions for the surface modifier for nano-alumina were that the mass percent of coupling agent was 4.5%, at 45℃ reacting for 5.5 h. It was shown by IR that the silane coupling agent reacted with the surface —OH of the alumina, by which nano-alumina was modified. Both the dispersity and stability of the modified alumina in organic phase were improved.
- alumina,
- silane coupling agent,
- surface modification,
- property
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