Facile Synthesis of Dual Modal Pore Structure Aerogel with Enhanced Thermal Stability
نویسندگان
چکیده
Regarding the preparation of aerogels by co-precursor method, skeleton collapse caused its low strength is one key problems that needs to be solved urgently. In this study, vinyl-functionalized silica aerogel was prepared under atmospheric drying conditions (APD) with vinyltriethoxysilane (V) and water glass (W) as co-precursors. The performance varied components When V:W ratio 0.8, had excellent properties thermal conductivity (0.0254 W/(m·K)), super hydrophobicity (hydrophobic angle 160°), high specific surface area (890.76 m2/g), porosity (96.82%), density (0.087 g/cm3). Test results SEM BET showed affected pore structure. around a dual modal structure composed both small (6–8 nm) large (20–30 mesopores, which could contribute enhance aerogel. On other hand, addition promoted stability reducing capillary force. novel combinations can provide guidance for APD conditions.
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ژورنال
عنوان ژورنال: Coatings
سال: 2022
ISSN: ['2079-6412']
DOI: https://doi.org/10.3390/coatings12101566