Silylation of polydiethoxysiloxane derived silica aerogels

Enhancing mechanical properties of silica aerogels

“…Through this process, the residual uncondensed silanols in the alcogel are further condensed to form additional siloxane bonds strengthening the polymeric network. When forming a TMS hydrophobic monolayer on the surface of the aerogel other silanes such as hexamethyldisilazane, trimethylsilylchloride, or dimethyldimethoxysilane can be used [23,24]. The addition of this hydrophobic monolayer, not only condenses residual silanols, but also protects the otherwise hydrophilic aerogel from water, thereby enhancing the structural integrity of the aerogel.…”

Correlation between physical properties and structure of silica xerogels

“…This can be avoided by rendering the surface of the pores hydrophobic prior to drying, through chemical treatment, e.g. with an alkylchlorosilane, such as chlorotrimethylsilane, Si(CH 3 ) 3 Cl [14][15][16][17]: the residual silanol groups are converted into trimethylsiloxane (hydrophobic) groups. Assuming full hydrolysis (y = 0) and substitution of the silanol groups, this reaction can be written as…”

Structural Design of P(BMA‐co‐VTES)/TEOS Hybrid Membranes for Removal of Benzene from Water by Pervaporation

“…Trimethylmethoxysilane (TMS) as a silane coupling reagent was added in ethanol at a 100:1 molar ratio of TEOS in the hybrid membrane. The silane coupling reaction was carried out at 25 °C for 24 h 15–17…”