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Título: | Optimization and characterization of reinforced biodegradable cellulose-based aerogels via polylactic acid/polyhydroxybutyrate coating |
Autor: | Reyes, Alcira; Calleja, Alberto; Gil-Guillén, Irene; Benito González, Isaac CSIC ORCID | Palabras clave: | Biodegradability Cellulosic aerogels PHB PLA Water resistance |
Fecha de publicación: | 4-oct-2023 | Editor: | Elsevier | Citación: | International Journal of Biological Macromolecules 253: 127224 (2023) | Resumen: | Vine shoots (VS) and waste eucalyptus paperboard (EP) have been used as cellulose sources (in the form of cellulose nanocrystals -CNCs- and cellulosic fibers respectively) for developing cellulose-based aerogels. Two different parameters including cellulose concentration (0.5 % and 2 % w/v) and freezing temperatures (-20 °C and -80 °C) were tested to evaluate differences in the porosity of the aerogels via Brunauer-Emmett-Teller (BET) and thermal conductivity analyses. In addition, a supplementary coating was applied to the raw aerogels by means of dipping the materials in either polylactic acid (PLA) or polyhydroxybutyrate (PHB) solutions (1 % w/v). Their microstructure was observed via SEM and the reinforcing capacity provided by the coating was measured by means of mechanical compressive tests (~10-fold improvement) and water resistance (contact angle >100°). Finally, aerogels' biodegradability was also confirmed according to the standard ISO 20200 thus providing a sustainable and high-performance alternative to conventional materials also following circular economy principles. | Versión del editor: | https://doi.org/10.1016/j.ijbiomac.2023.127224 | URI: | http://hdl.handle.net/10261/338722 | DOI: | 10.1016/j.ijbiomac.2023.127224 | ISSN: | 0141-8130 |
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