سنتز یک مرحله ای نانوسیلیکای آبگریز با استفاده از الکل زنجیر بلند ۱-اکتادکانول

چکیده مقاله

In this work, one-pot synthesis of modified silica nanoparticles with long-chain alcohol 1-Octadecanol by stober
method at 70C is presented. Hydrophobicity of particles increased dramatically by increasing the amount of 1-
Octadecanol up to 7 wt.%. Surface modification was completed during the first 90 minutes. Additional reaction time
had no further effect. The most possible modification was obtained when the reaction took place at pH=8. Successful
surface modification was confirmed by FT-IR spectroscopy, thermogravimetric analyses and contact angle
measurements. X-ray diffraction patterns indicate an amorphous structure which did not significantly change by
surface modification. Transmission electron microscopy images were used to investigate the morphology and
dimension of the silica particles.