Optimisation of critical parameters during alginate aerogels' production
Source abstract
Abstract
Abstract A new method – ethanol-induced gelation seems a promising method for preparing gels from various polysaccharides. Anyhow, the characteristics of alginate aerogel, prepared by this method are not the best and the process parameters should thus be optimized. In this research we investigated the effect of process variables, such as the viscosity of alginate, gelation time and type of primary alcohol, on the characteristic properties of prepared materials. Three types of alginic acid were used during the research. The gelation times were set at 1 h and 24 h. Methanol, ethanol, propanol and n -butanol were used for the gelation. The best characteristics of alginate aerogels were obtained by the 24 h gelation time and by using high-viscosity alginic acid. Gelation in methanol is the best method as the surface areas of those samples were much higher (370 m 2 g − 1 ) than those prepared in ethanol (180 m 2 g − 1 ). Those samples also provided low thermal conductivity (0.042 Wm − 1 K − 1 ).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Surface Modification and Superhydrophobicity · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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