Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor
Source abstract
Abstract
We report the synthesis of flexible, hydrophobic, and oleophilic silica aerogels through a two-step acid–base sol–gel reaction followed by supercritical drying, in which methyltriethoxysilane (MTES) is used as a precursor, ethanol (EtOH) as a solvent, and hydrochloric acid (HCl) and ammonia (NH3·H2O) as catalysts. At the optimal molar ratio of MTES:EtOH:H2O:HCl:NH3·H2O is 1:18:3.5:1.44 × 10−4:1.2, MTES-based silica aerogels show the minimum density of 0.046 g/cm3 and the maximum compression ratio of 80 % with 15.09 kPa stress. They are superhydrophobic with a water contact angle of 157° and thermally stable up to 350 °C. We also find that they show the excellent adsorption for ethanol with a ratio of 1400 %.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Surface Modification and Superhydrophobicity · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
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