CN110820331A - Preparation method of high-strength anti-wrinkle finishing agent material for natural fiber fabric - Google Patents
Preparation method of high-strength anti-wrinkle finishing agent material for natural fiber fabric Download PDFInfo
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- D06M2200/20—Treatment influencing the crease behaviour, the wrinkle resistance, the crease recovery or the ironing ease
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Abstract
The invention discloses a preparation method of a high-strength anti-wrinkle finishing agent material for natural fiber fabrics, and belongs to the technical field of textile materials. According to the technical scheme, when the hydroxyl modified collagen is compositely baked, esterification reaction can be carried out during the baking of the collagen, a larger three-dimensional net-shaped structure is generated, the collagen becomes a more effective high-molecular cross-linking agent, so that the wrinkle recovery angle is improved, the non-ironing performance of the fabric is improved, meanwhile, the hydroxyl in a composite gel system is sealed, the esterification reaction is not interfered, the hydrolysis trend of ester bonds is reduced, the washing fastness of the fabric is improved, the dehydration decomposition of the material at high temperature is effectively improved, and the yellowing phenomenon of the fabric is also effectively inhibited.
Description
Technical Field
The invention discloses a preparation method of a high-strength anti-wrinkle finishing agent material for natural fiber fabrics, and belongs to the technical field of textile materials.
Background
The cotton fiber is a textile fiber with a long history, has a plurality of excellent wearing performances of clothes, such as soft hand feeling, moisture absorption, air permeability, static resistance, wearing comfort and the like, and is deeply loved by people. However, cotton fiber has certain disadvantages, such as poor elasticity, easy wrinkling, easy shrinkage, easy microbial attack, fiber mildew and brittle damage, easy wrinkling during wearing and washing, incapability of maintaining a flat and stiff appearance, frequent ironing, and inconvenience for people's life. Therefore, after the synthetic fibers appear, the synthetic fibers and blended and interwoven fabrics thereof are popular once. In recent years, with the improvement of the living standard of the public and the increasing of environmental protection and health consciousness, people correspondingly change the concept of clothing, pursue to return to the nature, and advocate natural fiber. In order to overcome the defects that the all-cotton clothes are easy to wrinkle in the process of being taken and need to be ironed after washing, the non-ironing finishing becomes an important post-finishing processing technology.
In order to overcome the defect that cotton fabrics and silk fabrics are easy to wrinkle, the possibility of relative displacement between fiber molecular chains under the action of external force must be reduced, or the relative displacement which can enable the fiber molecular chains to form hydrogen bonds at a new position is prevented, so that after the external force is removed, the fibers can be quickly restored to the positions before being influenced by the external force. The anti-wrinkle mechanism of cotton and silk fabrics is mainly two-point, resin deposition and covalent crosslinking. The theory of resin deposition is that polymer materials are deposited in an amorphous region or fiber molecules are coated, so that relative slippage or deformation of molecular chains due to external force is limited. The covalent crosslinking mechanism is that a compound containing active groups capable of reacting with groups in the fibers is used as a finishing agent to chemically crosslink with hydroxyl or amino in molecules in the fibers to form covalent bonds and form a network structure in the fibers, and a catalyst is often added in the reaction process. So, when the fabric received the exogenic action, because resin deposition or covalent cross-linking's effect in the fibre, alright stabilize the original hydrogen bond structure between the molecular chain, reduce the probability that new hydrogen bond formed, not only reduced fibrous deformation, still improved fibrous deformation recovery ability to reach the crease-resistant effect to the fabric. At present, most of the non-ironing finishing agents industrially applied to cellulose fabrics (such as cotton, hemp and the like) are N-hydroxymethyl amide compounds and modified products thereof. The compound has the main advantages of good reaction performance, durable anti-wrinkle effect, low cost, mature process and capability of greatly improving the flatness and the anti-wrinkle performance of fabrics. However, the fabric finished by the finishing agent is easy to release formaldehyde in the using process, and the common scheme of modifying polycarboxylic acid has the defects of serious strength reduction, poor bending friction resistance, yellowing or the need of using a toxic catalyst and the like due to the polybasic carboxylic acid, so that the crease resistance modification performance of the material is needed to be improved.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the problems that the fabric finished by the traditional crease-resistant modifier is easy to release formaldehyde in the using process, and the common scheme of modifying polycarboxylic acid has the defects of serious strength reduction, no resistance to bending friction, yellowing or need of using a toxic catalyst and the like due to the polybasic carboxylic acid, the preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
(1) taking sodium lignosulfonate for purification treatment to obtain purified sodium lignosulfonate, respectively weighing 120-150 parts by weight of deionized water, 10-15 parts by weight of purified sodium lignosulfonate, 1-2 parts by weight of sodium hydroxide and 3-5 parts by weight of 20% hydrogen peroxide solution, placing the mixture into a triangular flask, stirring and mixing the mixture, placing the mixture into a water bath at 45-50 ℃ for treatment for 3-5 hours to obtain a water bath reaction liquid, respectively weighing 45-50 parts by weight of the water bath reaction liquid, 3-5 parts by weight of 65% sulfuric acid and 1-2 parts by weight of sodium sulfite, and stirring the mixture for 25-30 minutes to obtain a heat preservation mixed liquid;
(2) adding sodium chloride into the heat-preservation mixed solution according to the mass ratio of 1:15, stirring, mixing, filtering, performing centrifugal separation, collecting the separated precipitate, adding a sodium hydroxide solution with the mass fraction of 0.5% into the separated precipitate according to the mass ratio of 1:5, stirring, mixing, performing heat preservation reaction at 45-50 ℃ for 1-2 hours, standing, cooling to room temperature, performing centrifugal separation again to obtain a lower-layer gel matrix liquid;
(3) respectively weighing 45-50 parts by weight of deionized water, 10-15 parts by weight of collagen fiber, 1-2 parts by weight of glyoxylic acid and 5-8 parts by weight of 0.1mol/L sodium hydroxide solution, placing the mixture in a beaker, stirring and mixing, placing the mixture at 55-60 ℃ for heat preservation reaction for 3-5 hours, filtering the mixture by using a screen and collecting a filter cake, drying the filter cake in a vacuum freezing environment, and grinding and sieving the filter cake to obtain modified matrix collagen particles;
(4) adding modified matrix collagen particles into deionized water according to a mass ratio of 1:10, heating and preheating, adjusting the pH value of the preheated mixed solution to 2.0, standing and cooling to room temperature, adding pepsin into the preheated mixed solution, carrying out heat preservation reaction, heating to boil, carrying out heat preservation boiling, carrying out centrifugal treatment, collecting supernatant, respectively weighing 45-50 parts by weight of lower-layer gel matrix body fluid, 25-30 parts by weight of supernatant, 3-5 parts by weight of propylene glycol and 1-2 parts by weight of penetrant in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength anti-wrinkle natural fiber fabric.
The purification treatment step comprises the steps of adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 1-2 min, heating and refluxing at 85-90 ℃ for 65-80 min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 3-5 h, filtering, collecting a filter cake, and vacuum drying at 55-60 ℃ for 6-8 h to obtain the purified sodium lignosulfonate.
The screen is a 0.25-0.28 mu m screen.
The particle size of the modified matrix collagen particles is 500 meshes.
The temperature raising and preheating treatment temperature is 85-90 ℃.
The preheated mixed solution is regulated to have the pH value of 2.0 by adopting hydrochloric acid with the mass fraction of 0.5%.
The addition amount of the pepsin is 50U/g.
The heating to boiling is carried out according to the temperature rise of 2 ℃/min.
The invention has the beneficial effects that:
(1) the invention adopts sodium lignosulfonate as a main matrix material, because lignosulfonate molecules contain a large number of benzene rings, the lignosulfonate has certain rigidity and has a reinforcing effect on materials, because the lignosulfonate molecules are three-dimensional reticular molecules, the heat resistance of the materials can be improved, but because the lignosulfonate contains not only monosaccharide but also glycan, the lignosulfonate is modified by the technical scheme of the invention, firstly, the content of carbohydrate impurities in the sodium lignosulfonate is reduced by an acid hydrolysis-salting-out method, then the gel material is prepared by sulfonating the sodium lignosulfonate, after the modification by hydrogen peroxide oxidation and sulfite sulfonation, the content of hydrophilic groups such as hydroxyl, carboxyl, sulfonic group and the like in the molecules can be increased, and the hydrogen peroxide and the carbonyl on lignin side chains or the double construction reaction can be converted into hydroxyl or carboxyl, when the hydrogen peroxide reacts with a benzene ring of a lignin structural unit, the methoxyl can be converted into carboxyl, the benzene ring can be cracked, and the benzene ring is converted into a binary acid structure, so that the hydrogen peroxide can increase the content of the carboxyl and the hydroxyl in lignin molecules under the alkaline condition of normal temperature and pressure, and simultaneously reduce the content of the benzene ring and the methoxyl, thereby reducing the total amount of hydrophobic groups and increasing the total amount of hydrophilic groups, and when the hydrogen peroxide is used as a finishing agent, the crease recovery angle and the wear resistance of finished fabrics are effectively improved, and the fabrics are endowed with good hand feeling;
(2) according to the technical scheme, when the hydroxyl modified collagen is compositely baked, esterification reaction can be carried out during the baking of the collagen, a larger three-dimensional net-shaped structure is generated, the collagen becomes a more effective high-molecular cross-linking agent, so that the wrinkle recovery angle is improved, the non-ironing performance of the fabric is improved, meanwhile, the hydroxyl in a composite gel system is sealed, the esterification reaction is not interfered, the hydrolysis trend of ester bonds is reduced, the washing fastness of the fabric is improved, the dehydration decomposition of the material at high temperature is effectively improved, and the yellowing phenomenon of the fabric is also effectively inhibited.
Detailed Description
Adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 1-2 min, heating and refluxing at 85-90 ℃ for 65-80 min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 3-5 h, filtering, collecting a filter cake, and vacuum drying at 55-60 ℃ for 6-8 h to obtain purified sodium lignosulfonate; respectively weighing 120-150 parts by weight of deionized water, 10-15 parts by weight of purified sodium lignosulfonate, 1-2 parts by weight of sodium hydroxide and 3-5 parts by weight of 20% hydrogen peroxide solution, placing the mixture into a triangular flask, stirring and mixing the mixture, placing the mixture in a water bath at 45-50 ℃ for treatment for 3-5 hours to obtain a water bath reaction solution, respectively weighing 45-50 parts by weight of the water bath reaction solution, 3-5 parts by weight of 65% sulfuric acid and 1-2 parts by weight of sodium sulfite, stirring the mixture for 25-30 minutes under heat preservation to obtain a heat preservation mixed solution, adding sodium chloride into the heat preservation mixed solution according to the mass ratio of 1:15, stirring and mixing the solution, filtering and centrifugally separating the mixture, collecting separated precipitates according to the mass ratio of 1:5, adding 0.5% by mass of sodium hydroxide solution into the separated precipitates, stirring and mixing the mixture, placing the mixture for heat preservation reaction at 45-50 ℃ for 1-2 hours, standing and cooling the mixture to room temperature, and centrifugally separating the mixture for 10, obtaining lower layer gel matrix liquid; respectively weighing 45-50 parts by weight of deionized water, 10-15 parts by weight of collagen fiber, 1-2 parts by weight of glyoxylic acid and 5-8 parts by weight of 0.1mol/L sodium hydroxide solution, placing the materials into a beaker, stirring and mixing the materials, placing the mixture at 55-60 ℃ for heat preservation reaction for 3-5 hours, filtering the mixture by using a 0.25-0.28 mu m screen, collecting a filter cake, drying the filter cake for 6-8 hours in a vacuum freezing environment, and grinding the filter cake by using a 500-mesh sieve to obtain modified matrix collagen particles; adding modified matrix collagen particles into deionized water according to a mass ratio of 1:10, preheating in water bath at 85-90 ℃ for 3-5 min, adjusting the pH of the preheated mixed solution to 2.0 by using hydrochloric acid with the mass fraction of 0.5%, standing, cooling to room temperature, adding pepsin into the preheated mixed solution according to 50U/g, carrying out heat preservation reaction at 35-37 ℃ for 1-2 h, heating to boil at 2 ℃/min, carrying out heat preservation boiling for 10-15 min, carrying out centrifugal treatment at 8000-10000 r/min for 25-30 min, and collecting supernatant; respectively weighing 45-50 parts by weight of lower-layer gel matrix body fluid, 25-30 parts by weight of supernatant fluid, 3-5 parts by weight of propylene glycol and 1-2 parts by weight of penetrating agent JFC, placing the materials in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength crease-resistant natural fiber fabric.
Example 1
Adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 1min, heating and refluxing at 85 ℃ for 65min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 3h, filtering, collecting a filter cake, and vacuum-drying at 55 ℃ for 6h to obtain purified sodium lignosulfonate; respectively weighing 120 parts of deionized water, 10 parts of purified sodium lignosulfonate, 1 part of sodium hydroxide and 3 parts of 20% hydrogen peroxide solution by mass fraction, placing the materials in a triangular flask, stirring, mixing, placing in a water bath at 45 ℃ for 3h to obtain a water bath reaction solution, respectively weighing 45 parts of the water bath reaction solution, 3 parts of sulfuric acid with the mass fraction of 65% and 1 part of sodium sulfite by weight, stirring for 25min under the condition of heat preservation, obtaining heat preservation mixed liquor, adding sodium chloride into the heat preservation mixed liquor according to the mass ratio of 1:15, stirring, mixing, filtering, centrifuging, collecting the separated precipitate, adding 0.5% sodium hydroxide solution into the separated precipitate according to the mass ratio of 1:5, stirring, mixing, reacting at 45 deg.C for 1h, standing, cooling to room temperature, and centrifuging at 1200r/min for 10min to obtain lower layer gel matrix liquid; respectively weighing 45 parts of deionized water, 10 parts of collagen fiber, 1 part of glyoxylic acid and 5 parts of 0.1mol/L sodium hydroxide solution according to parts by weight, placing the materials into a beaker, stirring and mixing the materials, placing the materials into the beaker for heat preservation reaction at 55 ℃ for 3 hours, filtering the mixture by using a 0.25 mu m screen, collecting a filter cake, drying the filter cake for 6 hours in a vacuum freezing environment, and grinding the filter cake by using a 500-mesh sieve to obtain modified matrix collagen particles; adding modified matrix collagen particles into deionized water according to the mass ratio of 1:10, preheating in water bath at 85 ℃ for 3min, adjusting the pH of the preheated mixed solution to 2.0 by using hydrochloric acid with the mass fraction of 0.5%, standing, cooling to room temperature, adding pepsin into the preheated mixed solution according to 50U/g, carrying out heat preservation reaction at 35 ℃ for 1h, heating to boil at 2 ℃/min, carrying out heat preservation boiling for 10min, carrying out centrifugal treatment at 8000r/min for 25min, and collecting supernatant; respectively weighing 45 parts of lower-layer gel matrix body fluid, 25 parts of supernatant, 3 parts of propylene glycol and 1 part of penetrating agent JFC in parts by weight, placing the materials in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength crease-resistant natural fiber fabric.
Example 2
Adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 1min, heating and refluxing at 87 ℃ for 72min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 4h, filtering, collecting a filter cake, and vacuum-drying at 57 ℃ for 7h to obtain purified sodium lignosulfonate; respectively weighing 137 parts of deionized water, 12 parts of purified sodium lignosulfonate, 1 part of sodium hydroxide and 4 parts of 20% hydrogen peroxide solution by mass fraction, placing the materials in a triangular flask, stirring, mixing, placing in a water bath at 47 ℃ for 4h to obtain a water bath reaction solution, respectively weighing 47 parts by weight of the water bath reaction solution, 4 parts by weight of sulfuric acid with the mass fraction of 65% and 1 part by weight of sodium sulfite, stirring for 27min under the condition of heat preservation, obtaining heat preservation mixed liquor, adding sodium chloride into the heat preservation mixed liquor according to the mass ratio of 1:15, stirring, mixing, filtering, centrifuging, collecting the separated precipitate, adding 0.5% sodium hydroxide solution into the separated precipitate according to the mass ratio of 1:5, stirring, mixing, reacting at 47 deg.C for 1h, standing, cooling to room temperature, and centrifuging at 1350r/min for 12min to obtain lower layer gel matrix liquid; respectively weighing 47 parts of deionized water, 12 parts of collagen fiber, 1 part of glyoxylic acid and 7 parts of 0.1mol/L sodium hydroxide solution in parts by weight, placing the materials into a beaker, stirring and mixing the materials, placing the materials into the beaker for heat preservation reaction at 57 ℃ for 4 hours, filtering the mixture by using a 0.27 mu m screen, collecting a filter cake, drying the filter cake for 7 hours in a vacuum freezing environment, and grinding the filter cake by using a 500-mesh sieve to obtain modified matrix collagen particles; adding modified matrix collagen particles into deionized water according to the mass ratio of 1:10, preheating in a water bath at 87 ℃ for 4min, adjusting the pH of the preheated mixed solution to 2.0 by using hydrochloric acid with the mass fraction of 0.5%, standing, cooling to room temperature, adding pepsin into the preheated mixed solution according to 50U/g, carrying out heat preservation reaction at 36 ℃ for 1h, heating to boil at 2 ℃/min, carrying out heat preservation boiling for 12min, carrying out centrifugal treatment at 9000r/min for 27min, and collecting supernatant; respectively weighing 47 parts by weight of lower-layer gel matrix body fluid, 27 parts by weight of supernatant fluid, 4 parts by weight of propylene glycol and 1 part by weight of penetrating agent JFC, placing the materials in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength crease-resistant natural fiber fabric.
Example 3
Adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 2min, heating and refluxing at 90 ℃ for 80min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 5h, filtering, collecting a filter cake, and carrying out vacuum drying at 60 ℃ for 8h to obtain purified sodium lignosulfonate; respectively weighing 150 parts of deionized water, 15 parts of purified sodium lignosulfonate, 2 parts of sodium hydroxide and 5 parts of 20% hydrogen peroxide solution by mass fraction, placing the materials in a triangular flask, stirring, mixing, placing in a water bath at 50 ℃ for 5h to obtain a water bath reaction solution, respectively weighing 50 parts by weight of the water bath reaction solution, 5 parts by weight of sulfuric acid with the mass fraction of 65% and 2 parts by weight of sodium sulfite, stirring for 30min under heat preservation, obtaining heat preservation mixed liquor, adding sodium chloride into the heat preservation mixed liquor according to the mass ratio of 1:15, stirring, mixing, filtering, centrifuging, collecting the separated precipitate, adding 0.5% sodium hydroxide solution into the separated precipitate according to the mass ratio of 1:5, stirring, mixing, reacting at 50 deg.C for 2 hr, standing, cooling to room temperature, and centrifuging at 1500r/min for 15min to obtain lower layer gel matrix liquid; respectively weighing 50 parts by weight of deionized water, 15 parts by weight of collagen fiber, 2 parts by weight of glyoxylic acid and 8 parts by weight of 0.1mol/L sodium hydroxide solution, placing the deionized water, the 15 parts by weight of collagen fiber, the 2 parts by weight of glyoxylic acid and the 8 parts by weight of 0.1mol/L sodium hydroxide solution into a beaker, stirring and mixing the materials, placing the mixture into the beaker for heat preservation reaction at the temperature of 60 ℃ for 5 hours, filtering the mixture by using a 0.28 mu m screen, collecting a filter cake, drying; adding modified matrix collagen particles into deionized water according to a mass ratio of 1:10, preheating in a water bath at 90 ℃ for 5min, adjusting the pH of the preheated mixed solution to 2.0 by using hydrochloric acid with the mass fraction of 0.5%, standing, cooling to room temperature, adding pepsin into the preheated mixed solution according to 50U/g, carrying out heat preservation reaction at 37 ℃ for 2h, heating to boil at 2 ℃/min, carrying out heat preservation boiling for 15min, carrying out centrifugal treatment at 10000r/min for 30min, and collecting supernatant; respectively weighing 50 parts by weight of lower-layer gel matrix body fluid, 30 parts by weight of supernatant fluid, 5 parts by weight of propylene glycol and 2 parts by weight of penetrating agent JFC, placing the materials in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength crease-resistant natural fiber fabric.
The finishing agent material prepared by the technical scheme of the invention is coated by the following scheme, the coating is soaked twice and rolled twice, the soaking temperature is controlled to be 50 ℃, the soaking is carried out for 10min each time, the mangle rolling rate is 80-90%, the coating is dried for 10min at 85 ℃, and then the coating is dried for 6min at 180 ℃.
By referring to GB/T3819-1997 section 1 of testing recovery angle of crease resilience of textile fabric, 5 samples of the front surface are selected in the warp direction and the weft direction respectively, the slow-elastic crease recovery angle is tested on a YG541D full-automatic digital fabric crease elasticity instrument, and the average value is obtained, and simultaneously, referring to GB/T3923.1-1997 section 1 of tensile property of textile fabric: bar method for determination of breaking strength and elongation at break, measured on a YG026T electronic fabric strength machine, the specific test protocol is shown in table 1 below:
TABLE 1 comparison of Properties
From the above table, it can be seen that the finishing agent material prepared by the invention has excellent mechanical strength and wrinkle resistance.
Claims (8)
1. A preparation method of a high-strength crease-resistant finishing agent material for natural fiber fabrics is characterized by comprising the following specific preparation steps:
(1) taking sodium lignosulfonate for purification treatment to obtain purified sodium lignosulfonate, respectively weighing 120-150 parts by weight of deionized water, 10-15 parts by weight of purified sodium lignosulfonate, 1-2 parts by weight of sodium hydroxide and 3-5 parts by weight of 20% hydrogen peroxide solution, placing the mixture into a triangular flask, stirring and mixing the mixture, placing the mixture into a water bath at 45-50 ℃ for treatment for 3-5 hours to obtain a water bath reaction liquid, respectively weighing 45-50 parts by weight of the water bath reaction liquid, 3-5 parts by weight of 65% sulfuric acid and 1-2 parts by weight of sodium sulfite, and stirring the mixture for 25-30 minutes to obtain a heat preservation mixed liquid;
(2) adding sodium chloride into the heat-preservation mixed solution according to the mass ratio of 1:15, stirring, mixing, filtering, performing centrifugal separation, collecting the separated precipitate, adding a sodium hydroxide solution with the mass fraction of 0.5% into the separated precipitate according to the mass ratio of 1:5, stirring, mixing, performing heat preservation reaction at 45-50 ℃ for 1-2 hours, standing, cooling to room temperature, performing centrifugal separation again to obtain a lower-layer gel matrix liquid;
(3) respectively weighing 45-50 parts by weight of deionized water, 10-15 parts by weight of collagen fiber, 1-2 parts by weight of glyoxylic acid and 5-8 parts by weight of 0.1mol/L sodium hydroxide solution, placing the mixture in a beaker, stirring and mixing, placing the mixture at 55-60 ℃ for heat preservation reaction for 3-5 hours, filtering the mixture by using a screen and collecting a filter cake, drying the filter cake in a vacuum freezing environment, and grinding and sieving the filter cake to obtain modified matrix collagen particles;
(4) adding modified matrix collagen particles into deionized water according to a mass ratio of 1:10, heating and preheating, adjusting the pH value of the preheated mixed solution to 2.0, standing and cooling to room temperature, adding pepsin into the preheated mixed solution, carrying out heat preservation reaction, heating to boil, carrying out heat preservation boiling, carrying out centrifugal treatment, collecting supernatant, respectively weighing 45-50 parts by weight of lower-layer gel matrix body fluid, 25-30 parts by weight of supernatant, 3-5 parts by weight of propylene glycol and 1-2 parts by weight of penetrant in a mortar, grinding, dispersing and collecting dispersed slurry, filtering the dispersed slurry and collecting filtrate to obtain the finishing agent material for the high-strength anti-wrinkle natural fiber fabric.
2. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the purification treatment step comprises the steps of adding sodium lignosulfonate into a sulfuric acid solution with the mass fraction of 2.5% according to the mass ratio of 1:15, stirring, mixing, standing for 1-2 min, heating and refluxing at 85-90 ℃ for 65-80 min, standing, cooling to room temperature to obtain a reaction solution, dropwise adding a sodium chloride solution with the mass fraction of 15% into the reaction solution according to the mass ratio of 1:5, stirring, mixing, standing for 3-5 h, filtering, collecting a filter cake, and vacuum drying at 55-60 ℃ for 6-8 h to obtain the purified sodium lignosulfonate.
3. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the screen is a 0.25-0.28 mu m screen.
4. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the particle size of the modified matrix collagen particles is 500 meshes.
5. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the temperature raising and preheating treatment temperature is 85-90 ℃.
6. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the preheated mixed solution is regulated to have the pH value of 2.0 by adopting hydrochloric acid with the mass fraction of 0.5%.
7. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the addition amount of the pepsin is 50U/g.
8. The preparation method of the finishing agent material for the high-strength crease-resistant natural fiber fabric according to claim 1, characterized in that: the heating to boiling is carried out according to the temperature rise of 2 ℃/min.
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| GB2621381A (en) * | 2022-08-11 | 2024-02-14 | Univ Northwest | Lignosulphonate purification |
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