Results 241 to 250 of about 40,598 (285)
Production of Porous Agarose-Based Structures: Freeze-Drying vs. Supercritical CO2 Drying [PDF]
Gels, 2021 In this work, the effect of two processes, i.e., freeze-drying and supercritical CO2 (SC-CO2) drying, on the final morphology of agarose-based porous structures, was investigated. The agarose concentration in water was varied from 1 wt% up to 8 wt%. Agarose cryogels were prepared by freeze-drying using two cooling rates: 2.5 °C/min and 0.1 °C/min.
Lucia Baldino +2 more
exaly +4 more sources
Supercritical drying of cementitious materials [PDF]
Cement and Concrete Research, 2017 Techniques to characterize the microstructure of hydrated cement require dried materials. However, the microstructure of hydrated products is significantly altered by high capillary forces during drying when using the conventional drying methods. To avoid drying stresses when preparing samples, we have employed supercritical drying (SCD) which has been
Zhidong Zhang
exaly +2 more sources
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Journal of Non-Crystalline Solids, 1986
Abstract Crack free dry gels provide a possibly advantageous route to glasses for, for example, optical fibers. Cracking of condensed alkoxide silica gels occurs during drying when strains are produced because some capillaries are liquid filled while others have dried.
R.A Laudise, D.W Johnson
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Abstract Crack free dry gels provide a possibly advantageous route to glasses for, for example, optical fibers. Cracking of condensed alkoxide silica gels occurs during drying when strains are produced because some capillaries are liquid filled while others have dried.
R.A Laudise, D.W Johnson
openaire +1 more source
Supercritical drying of food products: An insightful review
Journal of Food Engineering, 2023Snehasis Chakraborty +2 more
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Modeling and scale-up of supercritical fluid processes. Part I: Supercritical drying
Journal of Supercritical Fluids, 2015Abstract The mathematical model has been developed to describe the hydrodynamics of supercritical fluid flow in the reactor, heat, and mass transfer during drying processes for aerogels production. The model is based on the provisions of continuum mechanics, and Ansys Fluent is used for its calculation. In this research, the medium inside the reactor
Artem Lebedev, Natalia Menshutina
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Supercritical drying of barium titanate alcogels
Proceedings of 1994 IEEE International Symposium on Applications of Ferroelectrics, 2002Aerogels are nanostructured materials containing a large volume of interconnected porosity, which are generated by the supercritical drying of sol-gel systems. Barium metal and titanium butoxide derived sol has been used to generate transparent alcogels.
G.D. Pethybridge +2 more
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Intensification methods of supercritical drying for aerogels production
Drying Technology, 2021The features of the supercritical drying process are considered. The intensification methods of the supercritical drying for the production of aerogels were shown.
Natalia Menshutina +3 more
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Design of supercritical fluid extractor using dry ice as a supercritical solvent
AIP Conference Proceedings, 2019The supercritical fluid extraction is the most effective and efficient way to extract valuable constituent in botanicals but the apparatus is usually very complex, complicated and expensive. Carbon dioxide gas needs to be pumped and pressed to reach its supercritical pressure.
Endang Kwartiningsih +3 more
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