CN112481735A - Skin-care moisture-retention regenerated cellulose fiber and preparation method thereof - Google Patents
Skin-care moisture-retention regenerated cellulose fiber and preparation method thereof Download PDFInfo
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- CN112481735A CN112481735A CN202011355828.0A CN202011355828A CN112481735A CN 112481735 A CN112481735 A CN 112481735A CN 202011355828 A CN202011355828 A CN 202011355828A CN 112481735 A CN112481735 A CN 112481735A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P21/00—Preparation of peptides or proteins
- C12P21/06—Preparation of peptides or proteins produced by the hydrolysis of a peptide bond, e.g. hydrolysate products
Abstract
The invention discloses a regenerated cellulose fiber for skin care and moisture retention, which is prepared by mixing a polygonatum extract and a viscose spinning solution and then spinning. The invention also discloses a preparation method of the regenerated cellulose fiber, which comprises the steps of crushing and grinding the rhizome of the polygonatum odoratum, and then purifying to prepare a polygonatum odoratum extracting solution; and then mixing the polygonatum odoratum extract with the viscose spinning solution and carrying out wet spinning to obtain a final product. The skin-care moisture-retention regenerated cellulose fiber disclosed by the invention has good moisture-retention performance, higher protein content, better hand feeling and good skin-care effect. The preparation method disclosed by the invention combines a physical method and a biological enzyme method, can furthest reserve the polygonatum odoratum polysaccharide and protein in the polygonatum odoratum, and has the advantages of simple process, easiness in realization, high efficiency, environmental friendliness and low energy consumption.
Description
Technical Field
The invention relates to a cellulose fiber, in particular to a preparation method of a regenerated cellulose fiber with skin care and moisture retention functions.
Background
The polygonatum odoratum is a perennial herb of polygonatum in liliaceae, is widely distributed in northeast, north China, east China, southwest China, south China and other provinces, is a traditional medicine and food plant, and has the root and stem commonly used for health care and food therapy, and has the effects of nourishing yin and lung, diminishing inflammation and inhibiting bacteria, growing and blackening hair, promoting the production of body fluid and quenching thirst and the like. The polygonatum odoratum has rich medicinal value, can be used as both medicine and food, and has wide development and application prospects. The polygonatum contains various beneficial components, wherein the content of polygonatum polysaccharide is 6-10%, the content of protein is more about 12%, and the content of amino acid beneficial to human body is about 5%. The polygonatum odoratum has rich medicinal value and can be used as both medicine and food, and is increasingly popular among people as an excellent nutritional tonic for nourishing, preventing dryness, reducing blood pressure and dispelling summer heat, and the demand of the polygonatum odoratum as a health food is far higher than that of the medicine industry.
At present, the application of polygonatum is mostly in the field of food health care, and particularly, the application of polygonatum may account for about 90 percent of the whole application of polygonatum; along with the continuous expansion of the application, the polygonatum is applied more and more in the fields of cosmetics, medical treatment and the like. In the field of cosmetics, polygonatum odoratum is mostly used as a traditional Chinese medicine component and plays a role in moisturizing and protecting skin; the polygonatum odoratum health care food is a natural raw material with rich nutrition in the field of health care food, has the effects of nourishing yin, moistening dryness, promoting the production of body fluid, quenching thirst, reducing blood pressure, reducing blood fat, improving myocardial ischemia and relieving the formation of atherosclerotic plaques, has good prevention and treatment effects on apoplexy, and has no report on related application of the polygonatum odoratum in the field of textiles.
Disclosure of Invention
The purpose of the invention is as follows: the first purpose of the invention is to provide a regenerated cellulose fiber with good moisturizing and skin-care performances and physical and mechanical performances; the second purpose of the invention is to provide a preparation method of the regenerated cellulose fiber for skin care and moisture retention.
The technical scheme is as follows: the regenerated cellulose fiber for skin care and moisture retention is prepared by mixing a polygonatum extract and a viscose spinning solution and then spinning.
Further, the viscose spinning solution contains alpha fibers, and the mass ratio of the polygonatum odoratum extract to the alpha fibers is 10-15: 100.
the preparation method of the regenerated cellulose fiber for skin care and moisture retention of the invention comprises the following steps:
(1) pulverizing and grinding the rhizome of the polygonatum odoratum, and then purifying to obtain a polygonatum odoratum extracting solution;
(2) mixing the rhizoma Polygonati Odorati extract with the viscose spinning solution to obtain a mixture;
(3) and carrying out wet spinning on the mixture to obtain a final product.
Further, in the step (1), the purification treatment comprises enzyme treatment, decolorization, dialysis, hot water leaching, drying and grinding dissolution.
Further, the enzyme treatment process comprises the step of adding the ground product and water into a reaction kettle, wherein the mass ratio of the product to the water is 1: 10-20; and then adding cellulase, pectinase, ligninase and proteolytic enzyme, and simultaneously adjusting the reaction temperature to be 50-55 ℃ and the reaction time to be 2-3 h.
Further, the dosage of the cellulase, the proteolytic enzyme, the pectinase and the ligninase is as follows: 1-1.5 g/L, 2-3 g/L, 1-1.5 g/L.
Further, the decoloring treatment adopts a hydrogen peroxide decoloring method, and the specific process comprises the following steps: 37.5 percent of hydrogen peroxide by mass, the mass ratio of the hydrogen peroxide to the polygonatum enzyme treatment liquid is 0.4, and the temperature is kept at 40 ℃ for 2 hours.
Further, the dialysis treatment comprises two working procedures, wherein the pore diameter molecular weight of the membrane pore in the first working procedure is 30KD-40 KD; in the second step, the pore diameter molecular weight of the membrane pore is 60KD-70 KD.
Further, in the hot water extraction treatment, the mass ratio of the polygonatum odoratum extract to water is 1: 20-30; the temperature of the water is 80-85 ℃, and the leaching time is 1-2 h; and then drying at the constant temperature of 60-80 ℃.
Further, in the grinding and dissolving treatment, the polygonatum extract is ground to 400-500 meshes and dissolved in 5-10% of NaOH solution by mass, and the mass ratio of the polygonatum extract to the solution is 10-20%.
Further, in the step (2), the mixing method is an interspinning injection.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) according to the skin-care moisture-retention regenerated cellulose fiber, the polygonatum extract is added, so that the fiber has good moisture-retention performance, high protein content, good hand feeling and good skin-care effect.
(2) According to the preparation method, the physical method and the biological enzyme method are combined, so that lignin, pectin and other substances in the polygonatum are degraded into micromolecular substances to be removed, cellulose and protein macromolecules in the polygonatum are degraded to about 50KD by cellulase and proteolytic enzyme, the polysaccharide and protein in the polygonatum are more favorably combined with viscose, the stability and the spinnability of a mixed system of the polygonatum extract and the viscose spinning solution are improved, and the utilization rate of the polygonatum polysaccharide and the polygonatum protein is further improved.
(3) The preparation method can furthest reserve the polygonatum odoratum polysaccharide and the protein in the polygonatum odoratum, and has the advantages of simple process, easy realization, high efficiency, environmental protection and low energy consumption.
Detailed Description
The technical solution of the present invention is further explained below.
The invention adopts a biological enzyme method to prepare the polygonatum dispersion liquid, the polygonatum dispersion liquid is mixed with the viscose spinning solution in a mode of interspinning injection, and then wet spinning is carried out to prepare the skin-care moisture-keeping regenerated cellulose fiber.
The method comprises the steps of firstly pre-crushing the polygonatum odoratum slices to prepare polygonatum odoratum powder, and then deeply grinding the polygonatum odoratum powder to finally prepare micron-sized polygonatum odoratum micro powder. And then carrying out enzyme treatment on the polygonatum fine powder, degrading the pectin, lignin and other impurities in the polygonatum into micromolecular substances with smaller molecular weight by utilizing the action of pectinase and ligninase, simultaneously degrading cellulose in the polygonatum into cellulose macromolecules with the degree of polymerization of about 500 by using cellulase, and degrading protein in the polygonatum by using proteolytic enzyme to ensure that the molecular weight of the protein is between 30KD and 70KD and is close to the molecular weight of the cellulose macromolecules. After dialysis and separation, substances such as polygonatum polysaccharides, proteins and cellulose in polygonatum are retained, and impurities such as lignin, pectin and minerals in polygonatum dispersion liquid are removed. Extracting rhizoma Polygonati Odorati after removing impurities with hot water to obtain mixture of rhizoma Polygonati Odorati polysaccharide and rhizoma Polygonati Odorati protein, oven drying, and pulverizing to obtain rhizoma Polygonati Odorati extract; and dissolving the polygonatum extract in a dilute alkali solution to prepare the polygonatum dispersion liquid. And finally, blending the polygonatum dispersion liquid and the viscose spinning solution, and preparing the skin-care and moisture-keeping regenerated cellulose fiber through wet spinning.
Example 1
The preparation method of the skin-care moisturizing regenerated cellulose fiber of the embodiment comprises the following steps:
and sequentially crushing, sieving and grinding the polygonatum to obtain the polygonatum nano micro powder. Preparing a mixture of 1: 10 Yuzhu and an aqueous dispersion system. Respectively adding cellulase, pectinase and ligninase into the mixed system, wherein the mass ratio of the polygonatum odoratum to the cellulase, the proteolytic enzyme, the pectinase and the ligninase is 1g/L, 2g/L and 1 g/L; the temperature of the reaction system is adjusted to 50 ℃, and the reaction time is 2 h. Adding 37.5 percent hydrogen peroxide by mass into the reaction kettle, wherein the mass ratio of the hydrogen peroxide to the polygonatum odoratum enzyme treatment solution is 0.4:1, and keeping the temperature at 40 ℃ for 2 hours.
Performing two dialysis procedures on a dialyzer, wherein the first dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 30KD-40KD, and the second dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 60KD-70KD, and removing the substances after the second dialysis to obtain the Polygonatum odoratum extract.
Adding the polygonatum odoratum extract and water into a reaction kettle 1 according to the mass ratio of 1:20, heating to 80-85 ℃, preserving heat for 1 hour, and then filtering and drying to obtain the polygonatum odoratum glycoprotein. Grinding the dried polygonatum odoratum glycoprotein extract to 400-500 meshes on grinding equipment.
A strong sodium oxide solution with the mass fraction of 5% is prepared in a reaction kettle 2, and the solvent is water. Then adding the ground polygonatum glycoprotein, wherein the polygonatum glycoprotein accounts for 10 percent of the mass of the sodium hydroxide solution, and uniformly stirring to obtain the polygonatum cellulose alkali solution.
The raw material of the viscose spinning solution is wood pulp with 500 polymerization degree, the methyl fiber content is more than 95 percent, and the viscose is prepared according to the following process route: dipping, squeezing, crushing, ageing, yellowing, continuously dissolving, filtering and defoaming to prepare the viscose spinning solution, wherein the content of the methyl fiber in the spinning solution is 9.0 percent.
Uniformly mixing the polygonatum odoratum cellulose aqueous solution and the viscose spinning solution through spinning of interspinning injection, wherein the mass ratio of the polygonatum odoratum extract to the methyl cellulose in the viscose spinning solution is 10%, and carrying out wet spinning on the mixed spinning solution, and carrying out procedures of drafting, drying, cutting, oiling and the like to prepare the skin-care moisture-preserving regenerated cellulose fiber.
Example 2
The preparation method of the skin-care moisturizing regenerated cellulose fiber of the embodiment comprises the following steps:
and sequentially crushing, sieving and grinding the polygonatum to obtain the polygonatum nano micro powder. Preparing a mixture of 1: 15 rhizoma Polygonati Odorati and water dispersion system. Respectively adding cellulase, pectinase and ligninase into the mixed system, wherein the mass ratio of the polygonatum odoratum to the cellulase, the proteolytic enzyme, the pectinase and the ligninase is 1.2g/L, 2.5g/L and 1.2 g/L; the temperature of the reaction system is adjusted to 50 ℃, and the reaction time is 2 h. Adding 37.5 percent hydrogen peroxide by mass into the reaction kettle, wherein the mass ratio of the hydrogen peroxide to the polygonatum odoratum enzyme treatment solution is 0.4:1, and keeping the temperature at 40 ℃ for 2 hours.
Performing two dialysis procedures on a dialyzer, wherein the first dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 30KD-40KD, and the second dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 60KD-70KD, and removing the substances after the second dialysis to obtain the Polygonatum odoratum extract.
Adding the polygonatum odoratum extract and water into a reaction kettle 1 according to the mass ratio of 1:25, heating to 80-85 ℃, preserving heat for 1 hour, and then filtering and drying to obtain the polygonatum odoratum glycoprotein. Grinding the dried polygonatum odoratum glycoprotein extract to 400-500 meshes on grinding equipment.
A strong sodium oxide solution with the mass fraction of 5% is prepared in a reaction kettle 2, and the solvent is water. Then adding the ground polygonatum glycoprotein, wherein the polygonatum glycoprotein accounts for 10 percent of the mass of the sodium hydroxide solution, and uniformly stirring to obtain the polygonatum cellulose alkali solution.
The raw material of the viscose spinning solution is wood pulp with 500 polymerization degree, the methyl fiber content is more than 95 percent, and the viscose is prepared according to the following process route: dipping, squeezing, crushing, ageing, yellowing, continuously dissolving, filtering and defoaming to prepare the viscose spinning solution, wherein the content of the methyl fiber in the spinning solution is 9.0 percent.
Uniformly mixing the polygonatum odoratum cellulose aqueous solution and the viscose spinning solution through spinning of interspinning injection, wherein the mass ratio of the polygonatum odoratum extract to the methyl cellulose in the viscose spinning solution is 12%, and carrying out wet spinning on the mixed spinning solution, and carrying out procedures of drafting, drying, cutting, oiling and the like to prepare the skin-care moisture-preserving regenerated cellulose fiber.
Example 3
The preparation method of the skin-care moisturizing regenerated cellulose fiber of the embodiment comprises the following steps:
and sequentially crushing, sieving and grinding the polygonatum to obtain the polygonatum nano micro powder. Preparing a mixture of 1:20 rhizoma Polygonati Odorati and water dispersion system. Respectively adding cellulase, pectinase and ligninase into the mixed system, wherein the mass ratio of the polygonatum odoratum to the cellulase, the proteolytic enzyme, the pectinase and the ligninase is 1.5g/L, 3g/L and 1.5 g/L; the temperature of the reaction system is adjusted to 50 ℃, and the reaction time is 2 h. Adding 37.5 percent hydrogen peroxide by mass into the reaction kettle, wherein the mass ratio of the hydrogen peroxide to the polygonatum odoratum enzyme treatment solution is 0.4:1, and keeping the temperature at 40 ℃ for 2 hours.
Performing two dialysis procedures on a dialyzer, wherein the first dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 30KD-40KD, and the second dialysis is performed by preferably selecting a dialysis membrane with a membrane pore diameter controlled to have a molecular weight of 60KD-70KD, and removing the substances after the second dialysis to obtain the Polygonatum odoratum extract.
Adding the polygonatum odoratum extract and water into a reaction kettle 1 according to the mass ratio of 1:30, heating to 80-85 ℃, preserving heat for 1 hour, and then filtering and drying to obtain polygonatum odoratum glycoprotein; grinding the dried polygonatum odoratum glycoprotein extract to 400-500 meshes on grinding equipment.
A strong sodium oxide solution with the mass fraction of 5% is prepared in a reaction kettle 2, and the solvent is water. Then adding the ground polygonatum glycoprotein, wherein the polygonatum glycoprotein accounts for 10 percent of the mass of the sodium hydroxide solution, and uniformly stirring to obtain the polygonatum cellulose alkali solution.
The raw material of the viscose spinning solution is wood pulp with 500 polymerization degree, the methyl fiber content is more than 95 percent, and the viscose is prepared according to the following process route: dipping, squeezing, crushing, ageing, yellowing, continuously dissolving, filtering and defoaming to prepare the viscose spinning solution, wherein the content of the methyl fiber in the spinning solution is 9.0 percent.
Uniformly mixing the polygonatum odoratum cellulose aqueous solution and the viscose spinning solution through spinning of interspinning injection, wherein the mass ratio of the polygonatum odoratum extract to the methyl cellulose in the viscose spinning solution is 15%, and carrying out wet spinning on the mixed spinning solution, and carrying out procedures of drafting, drying, cutting, oiling and the like to prepare the skin-care moisture-preserving regenerated cellulose fiber.
Comparative example 1
In the first dialysis procedure in the dialysis step in this comparative example, the molecular weight of the dialysis membrane was controlled to be 10KD, and the other raw materials, the ratio, the preparation method, the process parameters and the detection method were the same as those in example 1.
Comparative example 2
In the second dialysis procedure in the dialysis step in this comparative example, the molecular weight of the dialysis membrane was controlled to 100KD, and the other raw materials, ratio, preparation method, process parameters and detection method were the same as those in example 1.
Comparative example 3
In the comparative example, the dosages of the polygonatum odoratum, the cellulase, the proteolytic enzyme, the pectinase and the ligninase are 0.5g/L, 1g/L and 0.5g/L, and other raw materials, proportions, preparation methods, process parameters and detection methods are the same as those in example 1.
Comparative example 4
In the comparative example, the mass ratios of polygonatum odoratum to cellulase, proteolytic enzyme and ligninase are 2g/L, 4g/L and 2g/L, and other raw materials, proportions, preparation methods, process parameters and detection methods are the same as those in example 1.
Comparative example 5
In this comparative example, the hot water extraction step was not performed, and the other raw materials, ratios, preparation methods, process parameters, and detection methods were the same as those in example 1.
The breaking strength test of the fiber is carried out according to the test method of the tensile property of the short fiber of the GB/T14337-. The regenerated cellulose fiber obtained by spinning is processed by spinning, weaving, printing and dyeing and the like to obtain the corresponding regenerated cellulose fiber fabric, and the skin moisture content of a user when the fabric is used is tested as shown in the following table.
TABLE 1 Fabric moisturization and protein content test in fabrics woven from the fibers
As can be seen from table 1, among others,
compared with the embodiment 1, the control molecular weight of the first dialysis procedure membrane pore size is too small, so that a large amount of substances with small molecular weight, such as lignin, pectin, cellulose, hemicellulose, protein and the like, are remained in the polygonatum extract, and due to the existence of the small molecular substances, the polygonatum extract is influenced to have poor compatibility in the viscose spinning solution, and the small molecular substances are easy to aggregate, so that the pore blocking phenomenon is caused. Ultimately affecting the strength index of the fiber. And the small molecular substances are easy to lose in the later spinning process, so that the protein content in the finished fiber is low.
Compared with the embodiment 1, the comparative example 2 has the advantages that the excessive control molecular weight of the membrane aperture in the second dialysis procedure can cause the structures such as protein and cellulose with larger molecular weight to remain in the polygonatum extract, which not only can influence the compatibility of the polygonatum extract and the viscose spinning solution, but also can influence the strength index of the final fiber due to the hole blocking phenomenon in the spinning process caused by larger molecular weight
Comparative example 3 compared with example 1, due to the small amount of enzyme treatment to polygonatum odoratum extract, the degradation of cellulose and protein macromolecules is insufficient, resulting in low utilization rate of protein and cellulose, and poor mechanical properties of the finally prepared fiber due to the compatibility of polygonatum odoratum extract and viscose spinning solution.
Compared with the embodiment 1, the comparative example 4 has the advantages that the enzyme dosage is increased, the enzyme degradation reaction is too sufficient, the amount of micromolecular cellulose and protein in the extract can be greatly increased, the loss rate of the effective substances of the polygonatum odoratum is high, and the utilization rate is low.
Compared with the embodiment 1, the comparative example 5 has the advantages that the hot water extraction is not selected, the content of the fibrin is obviously reduced, so that the hot water extraction can promote the polygonatum odoratum polysaccharide and the polygonatum odoratum protein to form glycoprotein, the bonding force between the polygonatum odoratum polysaccharide and the polygonatum odoratum protein is larger, and the retention rate of the polygonatum odoratum polysaccharide and the polygonatum odoratum protein in the fiber can be effectively improved.
Experiments prove that the cellulose and the protein in the polygonatum are degraded by enzyme, the molecular weight of the cellulose and the protein macromolecules in the polygonatum is degraded by about 50KD, and the polygonatum is blended and spun with a viscose spinning solution to prepare the composite fiber with the highest protein content (compared under the same condition), and when the fabric made of the fibers is used, the skin moisture content of an experiencer is highest.
Claims (10)
1. The regenerated cellulose fiber for skin care and moisture retention is characterized in that the fiber is prepared by mixing a polygonatum extract and a viscose spinning solution and then spinning.
2. The skin-care moisture-retention regenerated cellulose fiber according to claim 1, wherein the viscose spinning solution contains alpha cellulose, and the mass ratio of the polygonatum odoratum extract to the alpha cellulose is 5-10: 100.
3. a method for preparing the skin-care moisturizing regenerated cellulose fiber according to claim 1, which is characterized by comprising the following steps:
(1) pulverizing and grinding the rhizome of the polygonatum odoratum, and then purifying to obtain a polygonatum odoratum extracting solution;
(2) mixing the rhizoma Polygonati Odorati extract with the viscose spinning solution to obtain a mixture;
(3) and carrying out wet spinning on the mixture to obtain a final product.
4. The preparation method of the skin-care moisture-retention regenerated cellulose fibers according to the claim 3, characterized in that in the step (1), the purification treatment comprises enzyme treatment, decolorization, dialysis, hot water extraction, drying and grinding dissolution.
5. The preparation method of the skin-care moisturizing regenerated cellulose fibers according to claim 4, wherein the enzyme treatment is to add water to the ground product, wherein the mass ratio of the product to the water is 1: 10-20; and then adding cellulase, pectinase, ligninase and proteolytic enzyme, and simultaneously adjusting the reaction temperature to be 50-55 ℃ and the reaction time to be 2-3 h.
6. The preparation method of the skin-care moisturizing regenerated cellulose fibers according to claim 4, characterized in that the decoloring treatment adopts a hydrogen peroxide decoloring method.
7. The preparation method of the regenerated cellulose fibers with the skin care and moisture retention functions as claimed in claim 4, wherein the dialysis treatment comprises two steps, wherein in the step one, the pore diameter molecular weight of the membrane pores is 30KD-40 KD; in the second step, the pore diameter molecular weight of the membrane pore is 60KD-70 KD.
8. The preparation method of the skin-care moisturizing regenerated cellulose fibers according to claim 4, wherein in the hot water leaching treatment, the mass ratio of the polygonatum odoratum extract to water is 1: 20-30; the temperature of the water is 80-85 ℃, and the leaching time is 1-2 h.
9. The preparation method of the regenerated cellulose fiber with skin care and moisture retention functions as claimed in claim 4, wherein in the grinding and dissolving treatment, the polygonatum extract is ground to 400-500 meshes and dissolved in a NaOH solution with the mass fraction of 5-10%, and the mass ratio of the polygonatum extract to the solution is 10-20%.
10. The preparation method of the skin-care moisturizing regenerated cellulose fibers according to claim 3, wherein in the step (2), the mixing method is a spinning injection.
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