Investigation of Aerogel Production Processes: Solvent Exchange under High Pressure Combined with Supercritical Drying in One Apparatusстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 апреля 2021 г.
Аннотация:This work aims to contribute to the theoretical and experimental research of supercriticalprocesses for intensification and combination in one apparatus. Investigation is carried out to improveproduction technology of organic alginate aerogels. It is proposed within the investigation to carryout the solvent exchange stage, an important stage of organic aerogels production, under pressure ina carbon dioxide medium in the same apparatus used for supercritical drying. The phase behavior inthe system “carbon dioxide–water–2-propanol”, which arises during such a solvent exchange stage,is studied theoretically. An experimental study of the process of step-by-step solvent exchange underpressure was carried out through multiphase and homogeneous regions of the phase diagram ofsuch a system. As a result, new highly efficient technology for the production of organic aerogelswas proposed, which can be implemented by combining the two main stages of the process.