Effect of different trimethyl silylating agents on the hydrophobic and physical properties of silica aerogels

Ultralight and hydrophobic nanofibrillated cellulose aerogels from coconut shell with ultrastrong adsorption properties

“…The modification by MTCS contributed to the formation of a low‐energy surface of the cellulose aerogels because of the replacement of surface hydrophilic hydroxyl groups on the cellulose with plentiful hydrophobic groups; this led to the generation of hydrophobicity . Figure (a) presents the FTIR spectra of the NFC aerogels and the MTCS‐treated aerogels.…”

The influence of the hydrophobic agent, catalyst, solvent and water content on the wetting properties of the silica films prepared by one-step sol–gel method

“…However, there is not any report on the preparation of hydrophobic silica film by one-step sol-gel process using Isooctyltrimethoxysilane as a modifying agent. Many reports are available for the evaluation of the effect of the hydrophobic agent on the water repellency [1,24,28,[32][33][34][35]. They reported that in single-step sol-gel method with increasing the concentration of the hydrophobic agent, contact angle increased.…”

Preparation and characterization of hydrophobic silica aerogel sphere products by co-precursor method

“…The weight loss of 5% appear in the TG curves with respect to the temperature within 290e550 C for the aerogels at I ¼ 0.2 and I ¼ 0.8. Meanwhile, the sharp exothermic peak at around 300 C and 450 C in the DTA curves attributed to the condensation among SieOH and oxidation of SieCH 3 to SieOH [27,28]. Therefore, the transition temperature from hydrophobic to hydrophilic was assessed as around 450 C, which corresponds to the disappearance temperature of the SieCH 3 groups developed by the surface chemical modification by MTES.…”