Preparation of algal polysaccharide and application of algal polysaccharide in cosmetics
A seaweed polysaccharide and seaweed technology, applied in the field of preparation and its application in cosmetics, can solve problems such as complicated procedures, achieve good water solubility, strong anti-oxidation, and delay aging effects
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[0051] Example 1
[0052] The present embodiment provides a preparation method of seaweed polysaccharide, comprising the following steps:
[0053] Step 1: Remove impurities
[0054] According to the solid-liquid ratio g / mL (1:20), the dried and pulverized seaweed was extracted with methanol under reflux for 4 hours, filtered, and the filtrate was recovered with methanol; the filter residue was evaporated to dry the residual methanol, and fully dried at 45 ° C for use.
[0055] Step 2: Extract
[0056] The dried filter residue was extracted with 0.2M hydrochloric acid solution, the material-to-liquid ratio of the filter residue and the hydrochloric acid solution was 1:30, the extraction temperature was 75 ° C, the extraction was performed for 2 hours, filtered, and the filtrate was subjected to a vacuum degree of 0.098Mpa. Evaporate to near dryness to obtain semi-fluid crude extract.
[0057] Step 3: Alcohol precipitation
[0058] Add ethanol slowly to the above crude extr...
Example Embodiment
[0067] Example 2
[0068] The present embodiment provides a preparation method of seaweed polysaccharide, comprising the following steps:
[0069] Step 1: Remove impurities
[0070] According to the solid-liquid ratio g / mL (1:30), the dried and pulverized seaweed was extracted with methanol under reflux for 2 hours, filtered, and the filtrate was recovered with methanol; the filter residue was evaporated to dry the residual methanol, and fully dried at 45 ° C for use.
[0071] Step 2: Extract
[0072] The dried filter residue was extracted with 0.2M hydrochloric acid solution, the material-to-liquid ratio of the filter residue and the hydrochloric acid solution was 1:15, the extraction temperature was 70 ° C, extraction was performed for 4 hours, filtered, and the filtrate was placed under a vacuum of 0.085Mpa. Evaporate to near dryness to obtain semi-fluid crude extract.
[0073] Step 3: Alcohol precipitation
[0074] Add ethanol slowly to the above crude extract, and k...
Example Embodiment
[0077] Example 3
[0078] The present embodiment provides a preparation method of seaweed polysaccharide, comprising the following steps:
[0079] Step 1: Remove impurities
[0080] According to the solid-liquid ratio g / mL (1:25), the dried and pulverized seaweed was extracted with methanol under reflux for 3 hours, filtered, and methanol was recovered from the filtrate; the filter residue was evaporated to dryness the residual methanol, and fully dried at 45 ° C for use.
[0081] Step 2: Extract
[0082] The dried filter residue was extracted with 0.1M hydrochloric acid solution, the material-to-liquid ratio of the filter residue and the hydrochloric acid solution was 1:20, the extraction temperature was 70°C, the extraction was performed for 4 hours, and the filtrate was filtered at a vacuum degree of 0.085Mpa. Evaporate to near dryness to obtain semi-fluid crude extract.
[0083] Step 3: Alcohol precipitation
[0084] Add ethanol slowly to the above crude extract, and...
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