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Dendrobium polysaccharide nano-cellulose hydrogel

A technology of nanocellulose and dendrobium polysaccharides, which is applied in the field of hydrogel materials and skin care products, can solve the problems of poor thermal stability, limit the promotion and application of skin care products, and reduce the effect of skin care, and achieve good thermal stability and delay skin aging. Aging, firming skin aging effect

Active Publication Date: 2019-10-29
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Dendrobium officinale is known as the "Panda in the Pharmaceutical World" in the international medicinal plant world, and is called "Life-saving Immortal Grass" by the folks. It has been proved by modern scientific research that it contains many nutrients such as Dendrobium, flavonoids, amino acids, etc., and among them The highest content is Dendrobium polysaccharide; therefore, there are many skin care products related to Dendrobium officinale in the market, but at present these skin care products have poor thermal stability. The effect is significantly reduced, and the actual needs of the people can no longer be met, thus limiting the promotion and application of these skin care products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare modified nanocellulose, comprising the following steps:

[0047] Step 1: Put 8 g of cellulose and 2 g of carboxymethyl cellulose into 40 ml of a mixed solvent and stir and mix them for 20 min at a speed of 300 r / min at a temperature of 20° C. to form the first mixed solution; (wherein the mixed solvent It is a mixture of acetone and N,N-dimethylacetamide, the volume ratio is 2:1)

[0048] Step 2: Add 1g modifier to the first mixed solution and stir and mix, and mix for 10 minutes at a speed of 400r / min and a temperature of 20°C to form a second mixed solution; then use 0.01M aqueous sodium hydroxide solution The pH of the second mixed solution was adjusted to 10-11, and at the same time, the temperature of the second mixed solution was raised to 60° C. for modification treatment, and the modification time was 3 hours, thereby preparing modified nanocellulose.

[0049] The modifiers are 3-[2-(pentafluorohexyl)ethoxy]-1,2-cycloethoxypropane, 5-chloro-1-(4-piperid...

Embodiment 2

[0051] The preparation of dendrobium polysaccharide nanocellulose hydrogel comprises the following steps:

[0052] Step 1: Place 2.5g of modified nanocellulose (prepared by Example 1), 0.9g of dendrobium polysaccharide and 0.3g of regulator in 20ml of deionized water, stir and mix, and mix well to form a mixed solution;

[0053] Step 2: Add 0.06g N-hydroxysuccinimide and 0.04g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide to the mixture, stir and mix for 15 minutes, then add 0.5 g of polyvinyl alcohol and 0.1 g of a crosslinking agent were reacted at a temperature of 70°C for a reaction time of 4 hours to prepare a hydrogel.

[0054] The regulator is 3-mercaptopropionic acid-2-ethyl-2-[(3-mercapto-1-oxopropoxyl)methyl]-1,3-propylene diester, N-bromobutane A mixture of imide and 1,2-epoxy-4-vinylcyclohexane in a mass ratio of 1:2:2.

[0055] The crosslinking agent is a mixture of glutaraldehyde and diglycolic anhydride, and its mass ratio is 4:1.

Embodiment 3

[0057]A kind of essence lotion containing dendrobium polysaccharide nanocellulose hydrogel, its preparation method comprises the following steps:

[0058] Step 1: Add 0.4g of glycerol, 0.3g of propylene glycol, 0.1g of sodium hyaluronate, 0.1g of mannitol, 0.1g of glutathione and 0.1g of sodium polyglutamate to 20ml of deionized water in sequence, stirring and mixing, at the rotating speed Mixing for 30min under the condition of 200rpm and temperature of 15℃ to form the third mixed solution;

[0059] Step 2: Next, add 3g of Dendrobium polysaccharide nanocellulose hydrogel (prepared by Example 2), 0.4g of xanthan gum, 0.1g of pearl powder and 0.2g of rose essential oil into the third mixed solution and stir and mix at a rotating speed. At 400 rpm, the mixture was mixed for 90 minutes at a temperature of 15° C. to prepare the essence.

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PUM

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Abstract

The invention discloses a dendrobium polysaccharide nano-cellulose hydrogel. Modified nano-cellulose, dendrobium polysaccharides and polyvinyl alcohol serve as main raw materials, wherein the dendrobium polysaccharides are taken from dendrobium officinale, the modified nano-cellulose is prepared from cellulose processed by a modifier, the modifier is a mixture of 3-[2-(five fluorine hexyl)ethyoxyl]-1,2-ethoxy cyclopropane, 5-chlorine group-1-(4-piperidyl)-2-benzimidazole indamide and dimethyl diallyl ammonium chloride; and the modified nano-cellulose has good compatibility with dendrobium polysaccharide and the polyvinyl alcohol. The dendrobium polysaccharide nano-cellulose hydrogel is a polymer with the polymer network structure, and contains hydrophilic groups and the network structure,the dendrobium polysaccharide can be wrapped, high stability is achieved, the biocompatibility of essence taking the dendrobium polysaccharide nano-cellulose hydrogel as the raw material is good, meanwhile skin aging can be delayed, heat stability of the essence is good, and the essence still has the good functions such as anti-aging after being placed in high-temperature for a period of time.

Description

technical field [0001] The invention relates to the fields of hydrogel materials and skin care products, and more specifically relates to a dendrobium polysaccharide nanocellulose hydrogel. Background technique [0002] In recent years, with the improvement of people's living standards, people pay more and more attention to skin care, because many chemical synthetic products will not only cause damage to the skin, but also have certain harm to the human body; more and more people prefer natural, Green skin care products, that is, adding various natural extracts to skin care products; the most representative of which is plant polysaccharides. [0003] Dendrobium officinale is known as the "Panda in the Pharmaceutical World" in the international medicinal plant world, and is called "Life-saving Immortal Grass" by the folks. It has been proved by modern scientific research that it contains many nutrients such as Dendrobium, flavonoids, amino acids, etc., and among them The hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L1/28C08L5/00C08L29/04C08J3/075C08J3/24
CPCC08J3/075C08J3/246C08J2301/02C08J2401/28C08J2405/00
Inventor 张伟禄邹锦萱陈文健孙襄扬李响齐淑彤劳东豪李雯
Owner WENZHOU UNIVERSITY