科研之友
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摘要
PEG ( Polyethylene Glycol)-grafted nano-titania has been obtained in a one-step procedure using hexamethylene diisocyanate as the coupling agent and dibutyltin dilaurate as the catalyst in toluene at 80 degrees C and characterized qualitatively by FTIR and quantitatively by elemental analysis and thermogravimetric analysis. A comparison of nano-titania with two other commonly used inorganic nanoparticles, nano-silica and nano-alumina, is made, revealing that reactivity order is nano-silica > nano-alumina > nano-titania in view of PEG grafting. Possible mechanism of PEG grafting is also discussed.
- 出版日期2007-5
- 单位清华大学
