Abstract
The present study describes the impregnation of coffee extract (CE) into bacterial cellulose synthesized from kombucha tea fungus (KBC) of different cellulose content, incubated for different incubation periods (2, 4, and 10 days), to prepare biocomposites having the potential for wound healing applications. Total polyphenols in hydroalcoholic extracts from ground roasted coffee and its release from the prepared biocomposites were determined as gallic acid equivalent. The polyphenols content was found to be 13.66 mg/g and the minimum inhibitory concentration (MIC) of the CE was determined using colony-forming unit (CFU) method against Gram-negative bacteria Escherichia coli and Gram-positive bacteria Staphylococcus aureus where the growth inhibition was 86 and 97% respectively. Biocomposites (KBC/CE) with the lowest cellulose and CE content showed the highest wet tensile stress (3.35 MPa), absorption of pseudo extracellular fluid (154.32% ± 4.84), and water vapor transmission rate (3184.94 ± 198.07 g/m2/day), whereas it showed the lowest polyphenols’ release (51.85% ± 2.94)when immersed in PBS buffer of pH 7.4. The impregnation of CE into KBC provided biocomposites that can enlarge the range of BC in the biomedical application.
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Highlights
•Bacterial cellulose as a pure, ultrafine, random, fibrous network, possessing high mechanical strength, high crystallinity, and high water absorption capacity lack antimicrobial activity.
•Impregnation of coffee extracts into bacterial cellulose was performed to afford antimicrobial activity to the BC matrix
•Evaluation of the prepared biocomposites in the terms of antimicrobial activity, wet tensile stress, absorption of pseudo extracellular fluid (PECF), water vapor transmission rate (WVTR), and the polyphenols’ release percentage showed that the biocomposites have the potential to be used in the wound healing field.
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El-Wakil, N.A., Hassan, E.A., Hassan, M.L. et al. Bacterial cellulose/phytochemical’s extracts biocomposites for potential active wound dressings. Environ Sci Pollut Res 26, 26529–26541 (2019). https://doi.org/10.1007/s11356-019-05776-w
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DOI: https://doi.org/10.1007/s11356-019-05776-w