| Summary: | Recently, there is a growing trend towards the fabrication of bioactive materials by using natural extracts, which can achieve diverse functionalities and environmental benefits simultaneously. This study presents a facile approach towards the preparation of bioactive and UV protective silk materials using the extract from red radish (an edible root vegetable). The adsorption mechanism of red radish extract on silk was studied. The results showed that red radish extract displayed higher exhaustion rate at lower pH. The equilibrium adsorption study indicated that the Langmuir and Freundlich isotherms were suitable to describe the adsorption behavior of red radish extract on silk, revealing that the ion–ion interactions, hydrogen bonding, and van der Waals forces play major roles in the adsorption process. The silk treated with red radish extract over 5% owf, exhibited excellent antioxidant activity, high antibacterial activities against Escherichia coli and Staphylococcus aureus, and very good UV protective property. The functionalities of the treated silk showed a gradual decline in the continuous washing process due to the release of red radish extract during washing. In general, the results demonstrate that the red radish treated silk materials have a promising future for the preparation of healthy and hygiene-related textiles. Keywords: Green chemistry, Natural extract, Silk, Adsorption, Antioxidant activity, Antibacterial activity, Ultraviolet protection
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