CN112708962A - Red yeast rice extract modified protein/cellulose composite fiber and preparation method thereof - Google Patents
Red yeast rice extract modified protein/cellulose composite fiber and preparation method thereof Download PDFInfo
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- SWGJCIMEBVHMTA-UHFFFAOYSA-K trisodium;6-oxido-4-sulfo-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate Chemical group [Na+].[Na+].[Na+].C1=CC=C2C(N=NC3=C4C(=CC(=CC4=CC=C3O)S([O-])(=O)=O)S([O-])(=O)=O)=CC=C(S([O-])(=O)=O)C2=C1 SWGJCIMEBVHMTA-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Artificial Filaments (AREA)
Abstract
The invention provides red yeast extract modified protein/cellulose composite fiber, wherein the red yeast extract comprises 0.95-1.86% by mass of the fiber and 4.85-9.75% by mass of protein; the invention also provides a preparation method of the fiber, which comprises the steps of preparing red yeast extract modified protein micro powder dispersion liquid, preparing blended spinning stock solution, spinning and post-treatment. The fiber prepared by the invention contains 0.95-1.86% of red yeast extract and 4.85-9.75% of protein; the dry breaking strength is 2.3-2.5cN/dtex, the wet breaking strength is 1.25-1.4cN/dtex, and the dry breaking elongation is 16-22%; meanwhile, the fabric made of the fiber has good moisture absorption and quick drying.
Description
Technical Field
The invention relates to a health-care fiber and a preparation method thereof, in particular to a red yeast rice extract modified protein/cellulose composite fiber with skin-friendly health-care function and a preparation method thereof, which are prepared by using protein micro powder as a carrier of a red yeast rice extract and adopting a blending wet spinning technology, and belong to the technical field of textiles.
Background
With the development of technology and the improvement of living standard of people, the idea of health is deep in mind, safe, comfortable and functional textiles increasingly become development requirements, the traditional Chinese medicine physiotherapy and health care effect is accepted by more and more people, the traditional Chinese medicine physiotherapy and health care effect is changed into dressing protection, and the functional health care textiles are popular with many consumers.
Chinese patent ZL201610159011.3 provides a preparation method of traditional Chinese medicine health-care regenerated cellulose fiber, which is prepared by extracting effective components from traditional Chinese medicines of apocynum venetum, mint, wormwood, folium isatidis, poria cocos and folium ginkgo, selecting one or more of the effective components, blending the effective components with viscose and performing wet spinning. According to the technology, traditional Chinese medicine components are directly added into spinning stock solution for spinning, although effective components of the traditional Chinese medicine are reserved in the fiber, the fiber has a certain health care function, the traditional Chinese medicine is easy to damage in strong acid and strong alkali environments due to no protection, and meanwhile, the problems that the binding force of an extract and cellulose is not strong, the subsequent fabrics are poor in washing resistance and the like exist.
Chinese patent ZL201110400581.4 is characterized in that a nanometer animal micropowder protein dispersion liquid is added into denatured viscose and uniformly stirred to prepare animal micropowder blending viscose, and the animal micropowder protein blending viscose is prepared through deaeration, filtration and spinning forming, but has the defects of easy loss of protein and washing fastness.
With the trend of comfortable and healthy life, people can not only meet the single functional requirements of fiber textiles, high-performance and multifunctional fiber textiles are continuously emerged, the development of multifunctional fibers is one of important directions for the development of chemical fiber industry, the market potential is huge, and the multifunctional fiber becomes the target pursued by people. Recent medical research reports suggest that red yeast rice has the effects of reducing blood pressure and blood fat, and the contained monascus can prevent the generation of cholesterol; the red yeast rice is purple red on the outer skin and red on the inner core, has slight sour taste and light taste, and is often used as a food dyeing pigment; compared with the chemical synthesis of red pigment, the red yeast rice has the advantages of no toxicity and safety, and also has the effects of promoting blood circulation, promoting blood circulation to remove blood stasis and enhancing immunity.
In the early stage test, the applicant finds that the red yeast rice extract and the protein powder are added into the viscose spinning solution, and the composite fiber prepared by spinning has the technical problem that the red yeast rice extract and the protein powder are easy to run off, and meanwhile, the washing resistance is poor.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides the red yeast extract modified protein/cellulose composite fiber, which takes protein micro powder and a red yeast extract as functional components, utilizes the high adsorption and coloring capacity of red yeast to protein, prepares modified protein micro powder containing high content of the red yeast extract by selecting the protein micro powder with large specific surface area, and prepares regenerated cellulose fiber containing the red yeast extract and protein components by combining specific spinning and post-treatment processes, thereby avoiding the loss of the red yeast extract and protein powder in the post-treatment processes of spinning, refining and the like and improving the washing resistance of the regenerated cellulose fiber.
In order to solve the technical problems, the invention adopts the following technical scheme:
a red yeast rice extract modified protein/cellulose composite fiber contains 0.95-1.86% of red yeast rice extract (calculated by monacolin-K content and measured by high performance liquid chromatography) and 4.85-9.75% of protein (measured by Kjeldahl method).
The following is a further improvement of the above technical solution:
the dry breaking strength of the fiber is more than or equal to 2.0cN/dtex, the wet breaking strength is more than or equal to 1.0cN/dtex, and the dry breaking elongation is 16-22%; meanwhile, the fabric made of the fibers has good moisture absorption and quick drying performance, the soaking time is 5.6-7.8 s, the level of 3-4 is achieved, the water absorption rate is 40.9-55.2%, and the level of 3-4 is also achieved (GB/T21655.2-2019 evaluation part 2 of the moisture absorption and quick drying performance of textiles: a dynamic moisture transfer method).
After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. the washing conditions and the washing method in the procedure are simplified, the fiber contains 0.90-1.80% of red yeast rice extract, 4.80-9.69% of protein and less loss.
A method for preparing red yeast rice extract modified protein/cellulose composite fiber comprises the following steps:
1. preparation of red yeast extract modified protein micro powder dispersion liquid
The protein micro powder is as follows: the preparation method comprises the steps of mixing crushed animal protein such as wool, silk, feather and the like or a mixture thereof with the particle size D90 being less than or equal to 2.0um and a red yeast extract (the content of monacolin-K is 3 percent) in a mass ratio of red yeast extract to protein micropowder =1:5, adding the mixture into deionized water to prepare a red yeast extract/protein micropowder dispersion liquid with the protein micropowder mass fraction being 10-20 percent, adjusting the pH value to 2-4 by using one of acetic acid, dilute hydrochloric acid or dilute sulfuric acid, heating to 70-80 ℃, stirring at a stirrer rotating speed of 300-times for 400r/min to ensure uniform adsorption, preserving the temperature for 30-50 min, cooling to 10-20 ℃, adding one of sodium sulfite or sodium hydroxide, adjusting the pH value to be neutral, emulsifying, filtering, defoaming and standing by a homogenizer.
Emulsifying by the homogenizer, and emulsifying by high shear (LR-100L) at 1000-1500 r/min for 10-30 min.
And (3) filtering: selecting a plate-and-frame filter, wherein the filter material is 1300g/m2The inlet pressure of the polypropylene fiber felt is controlled to be less than or equal to 0.4 MPa.
Defoaming; and (5) conventional vacuum defoaming.
2. Preparation of blended spinning dope
The viscose spinning solution is prepared by adopting a conventional viscose preparation process, and has the main indexes that: the mass fraction of the A cellulose is 8.85-9.50%, the mass fraction of the sodium hydroxide is 4.50-5.20%, the viscosity is 30-50 s, and the ripening degree is 12-20 mL. By adopting a pre-spinning injection technology, uniformly adding the red yeast rice extract modified protein powder dispersion liquid into the viscose spinning solution, wherein the addition amount of the red yeast rice extract modified protein powder dispersion liquid is 5.0-10.0% of the content of alpha fibers in viscose according to the protein content, so as to obtain a blended spinning stock solution.
3. Preparation of red yeast rice extract modified protein/cellulose composite fiber
And spinning the blended spinning stock solution through the adjusted coagulating bath, and drafting the primary tows to obtain the formed tows. The forming speed of the functional cellulose fiber is accelerated and the functional cellulose fiber presents a hollow structure by changing the coagulating bath, so that the surface area is enlarged, the content of effective components is increased by utilizing a mild desulfurization process, an acid pickling process and an oiling process, and the red yeast extract modified protein/cellulose composite fiber is obtained without bleaching.
Preferably, the coagulation bath comprises 100-110 g/L of sulfuric acid and 290-310 g/L of sodium sulfate, and zinc sulfate is not used.
Preferably, the desulfurization bath: na (Na)2SO35.0-8.5 g/L at 60-85 ℃.
Preferably, the pickling bath: dilute hydrochloric acid: 1.0-3.5 g/L, and the temperature is 60-70 ℃, not only playing the purpose of removing metal, but also having the function of adjusting the pH value to 6.0-6.8.
Preferably, the oil bath: 2.0-5.0 g/L at 55-65 ℃.
Preferably, a steam drying process is adopted, three-stage drying is carried out, the temperature of the first stage is 110-120 ℃, the time is 5.0-10 min, the temperature of the second stage is 115-125 ℃, the time is 5.0-10 min, and the temperature of the third stage is 105-115 ℃, and the time is 10-20 min. The moisture content of the dried cellulose fiber is 9.2% -12.5%.
The invention adopts the technical scheme to obtain the beneficial effects that:
(1) the prepared fiber contains 0.95-1.86% of red yeast extract (calculated by monacolin-K content and measured by high performance liquid chromatography), 4.85-9.75% of protein (measured by Kjeldahl method); the dry breaking strength is 2.3-2.5cN/dtex, the wet breaking strength is 1.25-1.4cN/dtex, and the dry breaking elongation is 16-22%; meanwhile, the fabric made of the fibers has good moisture absorption and quick drying performance, the soaking time is 5.6-7.8 s, the level of 3-4 is achieved, the water absorption rate is 40.9-55.2%, and the level of 3-4 is also achieved (GB/T21655.2-2019 evaluation part 2 of the moisture absorption and quick drying performance of textiles: a dynamic moisture transfer method).
After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 supplement 2006 appendix C4. simplified washing conditions and a washing method in a program, the fiber contains 0.90-1.80% of red yeast rice extract, 4.80-9.69% of protein, the loss rate of the red yeast rice extract is 2-5.3%, and the loss rate of the protein is 0.6-1%.
(2) The invention utilizes the high adsorption coloring capacity of the red yeast to protein, selects the protein micropowder with large specific surface area, and simultaneously adjusts the preparation reaction conditions of the dispersion liquid of the modified protein micropowder of the red yeast extract, thereby furthest increasing the adsorption capacity of the red yeast extract and preparing the modified protein micropowder containing high content of the red yeast extract. Through specific spinning and post-treatment processes, the prepared fiber reduces the loss of red yeast rice extract and protein powder in the spinning refining post-treatment process, and improves the washing resistance of the red yeast rice extract and protein powder.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1:
a method for preparing red yeast rice extract modified protein/cellulose composite fiber with specification of 1.33dtex 38mm comprises the following steps:
1. preparation of red yeast extract modified protein micro powder dispersion liquid
The protein micropowder is wool protein micropowder with particle size D90 ═ 1.968 μm, red yeast extract (3% by mass of monacolin-K) is mixed according to the mass ratio of red yeast extract to protein micropowder =1:5, and added into deionized water to prepare red yeast extract/protein micropowder dispersion with 10% by mass of protein micropowder, the pH is adjusted to 2 with acetic acid, the temperature is increased to 70 ℃, the stirrer rotates at 400r/min for stirring to ensure uniform adsorption, the temperature is kept for 30min, the temperature is reduced to 20 ℃, sodium sulfite is added to adjust the pH to be neutral, the mixture is emulsified by a high shear emulsifying homogenizer (LR-100L) at 1000r/min for 30min, and the filter material is 1300g/m2Polypropylene felt, inFiltering with plate-frame filter with pressure not higher than 0.4Mpa, and vacuum defoaming.
2. Preparation of blended spinning dope
The viscose spinning solution is prepared by adopting a conventional viscose preparation process, and has the main indexes that: the mass fraction of the alpha cellulose is 8.85 percent, the mass fraction of the sodium hydroxide is 4.50 percent, the viscosity is 30s, and the ripening degree is 12 mL. By adopting the injection technology before spinning, the red yeast rice extract modified protein powder dispersion liquid is uniformly added into the viscose spinning solution, and the addition amount is 5.0 percent of the mass content of the protein to the alpha fibers in the viscose.
3. Preparation of red yeast rice extract modified protein/cellulose composite fiber
And spinning the blended spinning stock solution through the adjusted coagulating bath, and drafting the primary tows to obtain the formed tows. The content of effective components is increased by utilizing a mild desulfurization process, an acid pickling process and an oiling process, and the red yeast extract modified protein/cellulose composite fiber is obtained without bleaching.
The coagulating bath comprises 100g/L of sulfuric acid and 290g/L of sodium sulfate; the desulfurization bath comprises: na (Na)2SO35.0g/L at 85 ℃; and (3) acid bath: dilute hydrochloric acid: 1.0g/L at 60 ℃, not only plays the role of removing metals, but also has the function of adjusting the pH value to 6.8; oil bath: 2.0g/L and the temperature is 65 ℃; a steam drying process is adopted, and three-stage drying is carried out, wherein the temperature of the first stage is 110 ℃ for 10min, the temperature of the second stage is 125 ℃ for 5.0min, and the temperature of the third stage is 105 ℃ for 20.0 min. The moisture content of the dried cellulose fiber was 12.5%.
The prepared red yeast extract modified protein/cellulose composite fiber with the specification of 1.33dtex 38mm contains 0.95 percent of red yeast extract (calculated by the content of monacolin-K) and 4.85 percent of protein; dry breaking strength 2.44cN/dtex, wet breaking strength 1.38cN/dtex, dry elongation at break 16%. Meanwhile, the fabric made of the fibers has good moisture absorption and quick drying properties, the soaking time is 5.6s and reaches the level of 4, the water absorption rate is 55.2 percent, and the level of 4 is also reached. After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. the washing conditions and the washing method in the procedure are simplified, the fiber contains 0.90 percent of red yeast rice extract, 4.80 percent of protein, the loss rate of the red yeast rice extract is 5.3 percent, and the loss rate of the protein is 1 percent.
Example 2:
a method for preparing red yeast rice extract modified protein/cellulose composite fiber with specification of 1.56dtex 38mm comprises the following steps:
1. preparation of red yeast extract modified protein micro powder dispersion liquid
The protein micropowder is fibroin micropowder with particle size D90 ═ 1.825 μm, and red yeast extract (3% by mass of Monacolin-K) is mixed according to the mass ratio of red yeast extract to protein micropowder =1:5, and added into deionized water to obtain red yeast extract/protein micropowder dispersion with protein micropowder mass fraction of 15.0%, and the red yeast extract/protein micropowder dispersion is adjusted to pH 3 with dilute hydrochloric acid, heated to 75 deg.C, stirred at 400r/min to ensure uniform adsorption, kept at temperature for 40min, cooled to 15 deg.C, and added with sodium hydroxide to adjust pH to neutral, emulsified at 1250r/min with high shear homogenizer (LR-100L), and emulsified for 20min, and filter material selected from 1300g/m2Filtering the polypropylene felt by a plate and frame filter with the inlet pressure of less than or equal to 0.4Mpa, and then carrying out conventional vacuum defoaming for later use.
2. Preparation of blended spinning dope
The viscose spinning solution is prepared by adopting a conventional viscose preparation process, and has the main indexes that: the mass fraction of the alpha cellulose is 9.26 percent, the mass fraction of the sodium hydroxide is 4.95 percent, the viscosity is 38s, and the ripening degree is 18 mL. By adopting the injection technology before spinning, the red yeast rice extract modified protein powder dispersion liquid is uniformly added into the viscose spinning solution, and the addition amount is 7.5 percent of the mass content of the protein to the methyl cellulose in the viscose.
3. Preparation of red yeast rice extract modified protein/cellulose composite fiber
And spinning the blended spinning stock solution through the adjusted coagulating bath, and drafting the primary tows to obtain the formed tows. The content of effective components is increased by utilizing a mild desulfurization process, an acid pickling process and an oiling process, and the red yeast extract modified protein/cellulose composite fiber is obtained without bleaching.
The coagulating bath comprises 105g/L of sulfuric acid and 300g/L of sodium sulfate; the desulfurization bath comprises: na (Na)2SO37.5g/L at 75 ℃; and (3) acid bath: dilute hydrochloric acid: 2.6g/L at 66 ℃, not only plays the role of removing metals, but also has the function of adjusting the pH value to 6.5; oil bath: 3.5g/L at 58 ℃; a steam drying process is adopted, and three-stage drying is carried out, wherein the temperature of the first stage is 115 ℃, the time is 8.5min, the temperature of the second stage is 120 ℃, the time is 7.5 min, and the temperature of the third stage is 110 ℃, and the time is 13.5 min. The moisture content of the dried cellulose fiber was 10.8%.
The prepared red yeast extract modified protein/cellulose composite fiber with the specification of 1.56dtex 38mm contains 1.46 percent of red yeast extract (calculated by the content of monacolin-K) and 7.36 percent of protein; dry breaking strength 2.38cN/dtex, wet breaking strength 1.31cN/dtex, dry elongation at break 18.5%. Meanwhile, the fabric made of the fibers has good moisture absorption and quick drying properties, the soaking time is 6.3s and reaches the level of 3, and the water absorption rate is 49.8 percent and reaches the level of 3. After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. the washing conditions and the washing method in the procedure are simplified, the fiber contains 1.43 percent of red yeast rice extract, 7.30 percent of protein, the loss rate of the red yeast rice extract is 2 percent, and the loss rate of the protein is 0.8 percent.
Example 3:
a method for preparing red yeast rice extract modified protein/cellulose composite fiber with specification of 1.67dtex 38mm comprises the following steps:
1. preparation of red yeast extract modified protein micro powder dispersion liquid
The protein micropowder is feather protein micropowder with particle size D90 ═ 1.562 μm, and red yeast rice extract (Ci' an Shang Cheng biological science and technology Co., Ltd, wherein the mass content of monacolin-K is 3%), mixing according to the mass ratio of red yeast rice extract to protein micropowder =1:5, adding into deionized water to prepare red yeast rice extract/protein micropowder dispersion with protein micropowder mass fraction of 20%, adjusting pH to 4 with dilute sulfuric acid, heating to 80 deg.C, and stirring with a stirrerStirring at 300r/min to ensure uniform adsorption, maintaining the temperature for 50min, cooling to 10 deg.C, adding sodium sulfite to adjust pH to neutral, emulsifying at 1500r/min with high shear emulsifying homogenizer (LR-100L) for 10min, selecting filter material of 1300g/m2Filtering the polypropylene felt by a plate and frame filter with the inlet pressure of less than or equal to 0.4Mpa, and then carrying out conventional vacuum defoaming for later use.
2. Preparation of blended spinning dope
The viscose spinning solution is prepared by adopting a conventional viscose preparation process, and has the main indexes that: the mass fraction of the alpha cellulose is 9.50 percent, the mass fraction of the sodium hydroxide is 5.20 percent, the viscosity is 50s, and the ripening degree is 20 mL. By adopting the injection technology before spinning, the red yeast rice extract modified protein powder dispersion liquid is uniformly added into the viscose spinning solution, and the addition amount is 10.0 percent of the mass content of the protein to the alpha fibers in the viscose.
3. Preparation of red yeast rice extract modified protein/cellulose composite fiber
And spinning the blended spinning stock solution through the adjusted coagulating bath, and drafting the primary tows to obtain the formed tows. The content of effective components is increased by utilizing a mild desulfurization process, an acid pickling process and an oiling process, and the red yeast extract modified protein/cellulose composite fiber is obtained without bleaching.
The coagulating bath comprises 110g/L of sulfuric acid and 310g/L of sodium sulfate; the desulfurization bath comprises: na (Na)2SO38.5g/L at 60 ℃; and (3) acid bath: dilute hydrochloric acid: 3.5g/L at 70 ℃, not only plays the role of removing metals, but also has the function of adjusting the pH value to 6.0; oil bath: 5.0g/L at 55 ℃; a steam drying process is adopted, and three-stage drying is carried out, wherein the temperature of the first stage is 120 ℃, the time is 5.0min, the temperature of the second stage is 115 ℃, the time is 10min, and the temperature of the third stage is 115 ℃, and the time is 10.0 min. The moisture content of the dried cellulose fiber was 9.2%.
The prepared red yeast rice extract modified protein/cellulose composite fiber with the specification of 1.67dtex 38mm contains 1.86 percent of red yeast rice extract (calculated by the content of monacolin-K) and 9.75 percent of protein; dry breaking strength 2.30cN/dtex, wet breaking strength 1.25cN/dtex, dry elongation at break 22%. Meanwhile, the fabric made of the fibers has good moisture absorption and quick drying properties, the soaking time is 7.8s and reaches the level of 3, and the water absorption rate is 40.9 percent and reaches the level of 3. After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. the washing conditions and the washing method in the procedure are simplified, the fiber contains 1.80 percent of red yeast rice extract, 9.69 percent of protein, the loss rate of the red yeast rice extract is 3.2 percent, and the loss rate of the protein is 0.6 percent.
Comparative example 1:
on the basis of the embodiment 1, the step 1 and the preparation of the red yeast rice extract modified protein micro powder dispersion liquid are changed, and the specific changes are as follows: the pH is adjusted to 2-4 without using one of acetic acid, dilute hydrochloric acid or dilute sulfuric acid, the red yeast rice extract modified protein/cellulose composite fiber with the specification of 1.33dtex 38mm is directly treated under the neutral condition, the rest steps are the same as the example 1, the red yeast rice extract modified protein/cellulose composite fiber prepared by the method contains 0.78 percent of red yeast rice extract (calculated by the content of monacolin-K) and 4.79 percent of protein; dry breaking strength 2.42cN/dtex, wet breaking strength 1.35cN/dtex, dry elongation at break 17.2%. Meanwhile, the fabric made of the fibers has good moisture absorption and quick drying properties, the soaking time is 6.1s and reaches the level of 4, the water absorption rate is 61.8 percent, and the level of 4 is also reached. The prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. simplified washing conditions and a washing method in a program, and the fiber contains 0.69 percent of red yeast rice extract and 4.65 percent of protein; the loss rate of the red yeast rice extract is 11.5 percent, and the loss rate of the protein is 2.9 percent.
In the fiber prepared in the comparative example 1, the content of the red yeast rice extract and the content of the protein are both obviously lower than that of the fiber prepared in the example 1, and after the fiber is washed for 20 times, the loss rate of the red yeast rice extract and the loss rate of the protein are both obviously higher than that of the fiber prepared in the example 1.
Comparative example 2
On the basis of example 1, the composition of the coagulation bath was changed to: keeping the concentration of 100g/L sulfuric acid and 290g/L sodium sulfate unchanged, adding 12.5g/L zinc sulfate, and the rest steps are the same as example 1, wherein the indexes of the prepared fiber are as follows: the prepared red yeast extract modified protein/cellulose composite fiber with the specification of 1.33dtex 38mm contains 0.90 percent of red yeast extract (calculated by the content of monacolin-K) and 4.81 percent of protein; dry breaking strength 2.49cN/dtex, wet breaking strength 1.40cN/dtex, dry elongation at break 16.2%. Meanwhile, the fabric made of the fibers has the soaking time of 20.6s and reaches the level of 2, and the water absorption rate of 35.9 percent and reaches the level of 3. After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. simplified washing conditions and a washing method in a program, the fiber contains 0.85 percent of red yeast rice extract, 4.72 percent of protein, the loss rate of the red yeast rice extract is 5.5 percent, and the loss rate of the protein is 1.9 percent.
It can be seen that the fabric made from the fibers prepared in comparative example 2 has a significantly longer wet out time than example 1 and a significantly lower water absorption rate than example 1.
Comparative example 3
On the basis of the example 1, the acid washing process of the step 3 is omitted, the other steps are the same as the example 1, and the indexes of the prepared fiber are as follows: the prepared red yeast rice extract modified protein/cellulose composite fiber with the specification of 1.33dtex 38mm contains 0.91 percent of red yeast rice extract (calculated by the content of monacolin-K) and 4.82 percent of protein; dry breaking strength 2.47cN/dtex, wet breaking strength 1.39cN/dtex, dry elongation at break 15.8%. Meanwhile, the fabric made of the fibers has good moisture absorption and quick drying performance, the soaking time is 6.5s and reaches the level of 4, the water absorption rate is 59.2 percent, and the level of 4 is also reached. After the prepared red yeast rice extract modified protein/cellulose composite fiber is washed for 20 times according to standard FZ/T73023 and 2006 appendix C4. simplified washing conditions and a washing method in a program, the fiber contains 0.85 percent of red yeast rice extract, 4.69 percent of protein, the loss rate of the red yeast rice extract is 6.6 percent, and the loss rate of the protein is 2.7 percent.
The fiber prepared in comparative example 3, after 20 washes, the red yeast rice extract and protein loss rate was significantly higher than the fiber prepared in example 1.
Unless otherwise specified, the proportions used in the present invention are mass ratios, and the percentages used are mass percentages.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A red yeast rice extract modified protein/cellulose composite fiber is characterized in that: the mass content of the red yeast rice extract is 0.95-1.86%, and the mass content of the protein is 4.85-9.75%.
2. A preparation method of red yeast rice extract modified protein/cellulose composite fiber is characterized by comprising the following steps: the preparation method comprises the steps of preparing red yeast extract modified protein micro powder dispersion liquid, preparing blended spinning stock solution, spinning and post-treatment.
3. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 2, characterized in that: the preparation method comprises the steps of preparing a red yeast extract modified protein micro powder dispersion liquid, mixing a red yeast extract and protein micro powder, adding the mixture into water to prepare a red yeast extract/protein micro powder dispersion liquid with the mass fraction of the protein micro powder of 10-20%, adjusting the pH value to 2-4, heating to 70-80 ℃, stirring, keeping the temperature for 30-50 min, cooling to 10-20 ℃, and adjusting the pH value to be neutral to obtain the red yeast extract modified protein micro powder dispersion liquid.
4. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 3, wherein the method comprises the following steps: the mass ratio of the red yeast extract to the protein micropowder is 1: 4.9-5.2; the particle size D90 of the protein micropowder is less than or equal to 2.0 um.
5. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 3, wherein the method comprises the following steps: and adjusting the pH to 2-4 by adopting inorganic acid.
6. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 2, characterized in that: the coagulating bath adopted by the spinning comprises 100-110 g/L of sulfuric acid and 290-310 g/L of sodium sulfate, and zinc sulfate is not contained.
7. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 2, characterized in that: the post-treatment comprises mild desulfurization, acid pickling, oiling and drying; and the post-treatment omits a bleaching process.
8. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 7, wherein the method comprises the following steps: the acid bath adopted by the acid washing is 1.0-3.5 g/L of dilute hydrochloric acid, and the temperature is 60-70 ℃.
9. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 7, wherein the method comprises the following steps: the moisture content of the dried cellulose fiber is 9.2% -12.5%.
10. The method for preparing red yeast rice extract modified protein/cellulose composite fiber according to claim 7, wherein the method comprises the following steps: the drying is steam drying and comprises three drying procedures: the temperature of the first section is 110-120 ℃ and the time is 5.0-10 min, the temperature of the second section is 115-125 ℃ and the time is 5.0-10 min, and the temperature of the third section is 105-115 ℃ and the time is 10-20 min.
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