ScholarLens Back to search
2011•Chinese Journal of Spectroscopy LaboratoryRequires access

Preparation and Characterization of Hydrophobic Mesoporous SiO_2

Yu Zhang

Open publisher page 0 citations

Abstract

Silica gel was prepared by acid-base two step catalysis using cheap industrial tetraethyl orthosilicate(TEOS) as precursor.The obtained silica gel was directly modified by trimethylchlorosilane/hexamethyldisiloxane(TMCS/HMDSO) mixed solution,and then dried at ambient atmosphere to prepare hydrophobic SiO2 aerogel with a high specific surface area.The chemical composites,thermal stability,hydrophobic property of the modified silica aerogel were studied by IR,N2 desorption and adsorption,DTA-TG spectrogram and the determination of contact angle.The results showed that the modified samples had a mesoporous structure with 6nm of pore diameter and 931m2/g of specific surface area.It had good hydrophobic property for the hydrophilic group(—CH3) linked to the aerogel’s surface and high thermal stability.

About this research paper

What this paper is about

Silica gel was prepared by acid-base two step catalysis using cheap industrial tetraethyl orthosilicate(TEOS) as precursor.The obtained silica gel was directly modified by trimethylchlorosilane/hexamethyldisiloxane(TMCS/HMDSO) mixed solution,and then dried at ambient atmosphere to prepare hydrophobic SiO2 aerogel with a high specific surface area.The chemical composites,thermal stability,hydrophobic property of the modified silica aerogel were studied by IR,N2 desorption and adsorption,DTA-TG spectrogram and the determination of contact angle.The results showed that the modified samples had a mesoporous structure with 6nm of pore diameter and 931m2/g of specific surface area.It had good hydrophobic property for the hydrophilic group(—CH3) linked to the aerogel’s surface and high thermal stability.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Silica gel was prepared by acid-base two step catalysis using cheap industrial tetraethyl orthosilicate(TEOS) as precursor.The obtained silica gel was directly modified by trimethylchlorosilane/hexamethyldisiloxane(TMCS/HMDSO) mixed solution,and then dried at ambient atmosphere to prepare hydrophobic SiO2 aerogel with a high specific surface area.The chemical composites,thermal stability,hydrophobic property of the modified silica aerogel were studied by IR,N2 desorption and adsorption,DTA-TG spectrogram and the determination of contact angle.The results showed that the modified samples had a mesoporous structure with 6nm of pore diameter and 931m2/g of specific surface area.It had good hydrophobic property for the hydrophilic group(—CH3) linked to the aerogel’s surface and high thermal stability.

Key concepts: Aerogel, Tetraethyl orthosilicate, Thermal stability, Hexamethyldisiloxane, Hydrophobic silica, Mesoporous material, Chemical engineering, Mesoporous silica

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Preparation and Characterization of Hydrophobic Mesoporous SiO_2 — Research Paper | ScholarLens