Preparation method of dendrobium polysaccharides and product thereof

Abstract

The invention discloses a preparation method of dendrobium polysaccharides. The method comprises the following steps of: S1, heating water to a preset temperature, adding dendrobium officinale sections, and carrying out heat preservation; S2, squeezing a mixed liquid obtained in the step S1, and performing separation to obtain residues and squeezed liquid; S3, adding a calcium hydroxide solution into the squeezed liquid obtained in the step S2, performing filtering, and collecting filtrate; and S4, decolorizing the filtrate obtained in the step S3 to obtain the dendrobium polysaccharides. Thepreparation method is simple in process, easy to filter, free of organic solvent, free of enzyme, less in solid waste and beneficial to production amplification, and meanwhile, the preparation methodbreaks through the effects of eliminating opalescence, increasing the yield and keeping long-time stability, and is beneficial to production conversion and product application.

Description

technical field [0001] The invention relates to the technical fields of biomedicine and cosmetics, in particular to a preparation method of Dendrobium polysaccharide and its products. Background technique [0002] Dendrobium officinale is a traditional and precious medicinal material. It has been included in the catalog of homology of medicine and food, and it is distinguished from other species of Dendrobium in the Pharmacopoeia. Therefore, it has far-reaching significance for the development of Dendrobium officinale. In the field of biomedical technology, modern pharmacological studies have proved that the main active ingredient in Dendrobium officinale is polysaccharides, which have various biological functions such as lowering lipids, lowering blood sugar, anti-tumor and improving immunity. In the field of cosmetic technology, Dendrobium polysaccharides are also more and more reused, especially in moisturizing, anti-allergic and anti-inflammatory, anti-aging, skin repair...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of extracting polysaccharides from Dendrobium uses dried Dendrobium as raw material. The process is complex, the extraction rate is low, and the solid-liquid separation is difficult. In order to increase the yield, cellulase or alkaline water is often used to destroy the cell wall. At the same time, it also destroyed part of Dendrobium polysaccharides

Chinese patent CN201710654381.9 discloses a process for enzymatically preparing polysaccharides from Dendrobium candidum, in which pectinase is used to hydrolyze pectin, reduce viscosity, and solve the problem of difficult filtration; cellulase is used to hydrolyze cellulose, which helps polysaccharides The dissolution of polyphenols; use laccase to oxidize polyphenols to improve stability. However, despite the high efficiency and specificity of the enzyme, the hydrolysis of dendrobium polysaccharides by industrial enzymes is also very fast, which not only affects the yield, but also stabilizes the process. sex carries risks

[0004] At present, there are relatively few methods for extracting polysaccharides from fresh Dendrobium dendrobii. For example, Chinese patent CN201610766175.2 discloses a polysaccharide from Dendrobium officinale and its preparation method and application. As a result, the fibers are fine, the viscosity of the slurry is high, the difficulty of solid-liquid separation increases, and it is difficult to achieve large-scale production

[0005] At present, the decolorization of dendrobium polysaccharides often requires the use of activated carbon, but activated carbon has no selectivity for the adsorption of polysaccharides and pigments. While adsorbing pigments, it also adsorbs a large amount of polysaccharides, which reduces the extraction rate. Enzymes, methylate polyphenols, solve the discoloration problem formed after polyphenol oxidation, such as Chinese patent CN201710654381.9

[0006] In addition, the salt content in the extracted Dendrobium polysaccharides will reduce the thickening effect of carbomer thickeners, resulting in the inability to guarantee the quality of downstream products, but most Dendrobium polysaccharides have not paid much attention to this