Applications of agar oligosaccharide in cosmetics
A technology of oligosaccharides and cosmetics, applied in whitening, agar oligomers in the field of moisture absorption, can solve the problems of weakened moisture retention of oligosaccharides, achieve good inhibitory activity, reduce the formation of melanin, and have high safety Effect
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preparation example 1
[0029] Wash and remove impurities from the altar laver, then dry it at 45°C, add appropriate amount of water (algae water ratio is 1:15), soak for 2 hours, and then soak in 5% sodium hydroxide solution for 12 hours (algae:alkaline ratio is 1:15) . After the alkaline immersion solution was stirred in a boiling water bath for 1 hour, it was washed with water and bleached with 0.08% hypochlorous acid solution for 2 minutes. This was followed by acidification with pH 1.28 hydrochloric acid for 5 minutes. Repeatedly wash the leaves to neutral. Add appropriate amount of water (the ratio of algae to water is 1:40), boil for 1 hour, filter, take the supernatant gel to freeze, and then dry at 45°C to obtain agar.
[0030] Make agar gel into a 1% solution, add citric acid to adjust the pH to 1-2, stir and react for 4.5 hours in a 60°C water bath, neutralize, concentrate under reduced pressure, add absolute ethanol (sample solution: ethanol = 1: 3), put in the refrigerator overnight. ...
preparation example 2
[0032] Commercially available food-grade agar was used as the raw material for the preparation of oligosaccharides, and the preparation method was the same as above.
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