Caracterización de sericina obtenida a partir de aguas de desengomado de seda natural
DOI:
https://doi.org/10.15665/rp.v11i2.31Keywords:
Caracterización, Desengomado, Proteína, Seda, SericinaAbstract
La sericina es una proteína globular parcialmente soluble en agua, que se obtiene luego de un proceso conocido
como desengomado. Estudios indican que ésta puede ser reticulada, copolimerizada, y mezclada con otros materiales
para introducir mejoras en ellos, además presenta diferentes actividades biológicas. Estos factores hacen de
ella un ingrediente valioso para la industria alimentaria, farmacéutica y cosmética. En este trabajo se evaluaron
características químicas y térmicas de la sericina presente en las aguas de desengomado de la seda extraída con
jabón de coco (JC) y bicarbonato de sodio (BS), simulando procedimientos semiindustriales realizados por la
Corporación para el Desarrollo de la Sericultura del Cauca – CORSEDA (Popayán-Colombia). La precipitación
de la sericina se lleva a cabo con etanol al 75%. Luego se caracteriza, estableciendo el contenido de proteína por el
método Kjeldahl. Se observa que la sericina extraída tiene un 63,8% de pureza, con presencia de JC y BS, lo cual
se evidencia en los ensayos de espectroscopía infrarroja (IR) y análisis termogravimétrico (TGA). De acuerdo a los
resultados obtenidos, se concluye que la precipitación con etanol permite recuperar la sericina de las aguas del
desengomado, sin embargo, de acuerdo a las aplicaciones se requieren posteriores tratamientos que incrementen
la pureza de las muestras.
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