Production of bacterial cellulose with antioxidant additive from grape residue with promising cosmetic applications

The present study describes the development of a polymeric matrix based on bacterial cellulose (BC) additivated with grape skin residue extract by in situ and ex situ methods, to obtain a material with antioxidant and moisturizing characteristics for possible cosmetic applications. The samples developed by the different methods showed antioxidant activity, and this property was intensified with the increase of the extracted content used. Among the samples added by the in situ method, the produced with a fermentation medium containing only pure grape skin residue extract (100%v/v-G100) presented the highest value of antioxidant activity 35.6%. While for the produced by the ex situ method (HSGex situ) the value was approximately 30.3%. Both antioxidant activity results were close to those found for the pure extract (38.5%), emphasizing its stability even after incorporation into the membrane. In addition, it was observed that other properties, such as high water retention capacities (around 98%), high porosity (around 85%), and low crystallinity, favor the development of cosmetic products, because they increase the moisturizing effect and the ability to incorporate active compounds. In addition, the use of residue from the grape juice extraction process is valuable inputs for BC additive with antioxidant properties.

Automated summary

This study developed a material with antioxidant and moisturizing characteristics for possible cosmetic applications by adding grape skin residue extract to a polymeric matrix based on bacterial cellulose through in situ and ex situ methods. The samples showed antioxidant activity, with the highest value found in the sample produced with fermentation medium containing pure grape skin residue extract. The high water retention capacities, high porosity, and low crystallinity of the samples favor the development of cosmetic products with enhanced moisturizing effect and active compound incorporation ability.