Ultrasonic Wave Assisted Preparation and Properties of SiO2 Aerogels by Fractional Modification

Wei Ming Yao; Wen Zhi Zheng; He Chao Pan; Zhen Yue Chi; Hai Jian Chen

doi:10.4028/www.scientific.net/AMR.557-559.1037

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 557-559Ultrasonic Wave Assisted Preparation and...

Ultrasonic Wave Assisted Preparation and Properties of SiO₂ Aerogels by Fractional Modification

Abstract:

In this study, hydrophobic SiO₂ aerogel was prepared through fractional hydrophobic modification and ambient pressure drying of the raw material, tetraethoxysilane (TEOS) under ultrasonic wave and using trimethyl chlorosilane as modifier and acid catalyst in the process of sol-gel and acid-base catalysis. SiO₂ aerogels were analyzed and compared using scanning electron microscopy (SEM), transmission electron microscope (TEM), Brunauer-Emmett-Teller analysis method, Fourier transform infrared spectroscopy, X-ray diffraction. The results indicate that by adopting the ultrasonic wave, the specific surface area of SiO₂ aerogels was 801.71 m²/g. Pore distribution in micro-pore range was 0.5-1 nm. Pore distribution in meso-pore range was 2.0-20 nm. The hydrophobic SiO₂ aerogels with the hydrophobic angle at 160° displayed super hydrophobicity.

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Periodical:

Advanced Materials Research (Volumes 557-559)

Pages:

1037-1040

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.557-559.1037

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Online since:

July 2012

Authors:

Wei Ming Yao, Wen Zhi Zheng, He Chao Pan, Zhen Yue Chi, Hai Jian Chen

Keywords:

Fractional Modification, Hydrophobic Modification, SiO₂ Aerogels, Ultrasonic Wave (UW)

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