Study on surface modification of nano-alumina with silicane coupling agent KH550

摘要

Silane coupling agent KH550 was used to modify the surface of nano-alumina.Ultrasonic dispersion was employed to take the place of traditional mechanical stir.Absorbency of the aqueous solution ofnano-Al2O3,which had been modified,was determined to confirm that under this process condition the optimum amount of KH550 was 2.5％ while the optimum time was 50 minutes.The infrared spectra indicated that the surface of nano-Al2O3 had been modified and the absorption of KH550 really existed there.