Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 20, Pages 5973-5977Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2010.03.104
Keywords
Hydrophobic; Alumina aerogel; Surface modification; Siloxane
Categories
Funding
- Changjiang Scholars Program of China
Ask authors/readers for more resources
Hydrophobic crack-free alumina aerogel monoliths were fabricated by -Si(CH3)(3) (trimethylsilyl substituent) modi. cation of alcogels followed by an ambient pressure drying procedure. One-step solvent exchange and surface modi. cation were simultaneously progressed by immersing alumina alcogels in trimethylmethoxysilane (TMMOS)/hexane solution. It is found that the hydrophobic property of alumina aerogels is affected by the contents of TMMOS from the measurements of contact angle and Fourier transform infrared spectrometry. Thermogravimetry/differential scanning calorimetry analyses reveal that the modified aerogels maintain their hydrophobic behavior up to a temperature of 260 degrees C. The structure and morphology of the obtained hydrophobic alumina aerogels were characterized by the measurements of N-2 physical adsorption and scanning electron microscopy, which showed that they were highly porous materials with narrow slit-like pore geometry and a high degree of pore size uniformity. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available