Comparison of some physical properties of silica aerogel monoliths synthesized by different precursors

Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

“…This is consistent with the results for nitrogen at 50-10 5 Pa and SRM at 10 4 -10 5 Pa. Although the thermal conductivity is higher for our cryogel powders than for aerogels prepared by supercritical drying in reports [24,36], our technique is simple and inexpensive, and can be used in large-scale thermal insulating applications at low pressures, such as vacuum insulating plates [37] and silica granulate insulating materials [38,39].…”

Aerogel insulation for building applications: A state-of-the-art review

“…From the point of view for application as thermal insulation, the thermal conductivities of PEDS and TMOS aerogel monoliths will be found lower compared to TEOS aerogel monoliths [81], whereas high-quality transparent aerogels have been developed [75] based on TEOS. Additional solvents such as ethanol are needed too much water will yield low-porosity gels.…”

Hybrid aerogel preparations as drug delivery matrices for low water-solubility drugs

“…For the 78 aerogels synthesized, functionalized and impregnated in this work, two processing characteristics of the supercritical fluid technology make the method 79 significantly more efficient than when applying other more conventional liquid solvents. First, the null surface tension of a supercritical fluid allows the 80 drying of alcogels preserving their porosity to form aerogels (Wagh et al, 1999;Yoda and Ohshima, 1999). Second, due to the low viscosity and high 81 diffusivity of fluids under supercritical conditions, scCO2 solutions have the ability to penetrate and efficiently impregnate porous matrices with organic 82 solutes, in this work selected model drugs, again without damaging the porous structure (Domingo et al, 1998;Murillo-Cremaes et al, 2010).…”