Bio-based finishing agent and waterproof and antifouling finishing method of superfine fiber product
By using a combination of bio-based finishing agent and crosslinking agent, the problem of poor durability of existing fluorine-free waterproofing agents after washing is solved, and efficient waterproof and stain-proof finishing of microfiber products is achieved, and the water-resistant resistance is significantly improved.
Patent Information
- Application Number
- CN202510344442.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-05-30
AI Technical Summary
The existing fluorine-free waterproofing agents have poor durability and poor versatility after washing, making them difficult to apply to thin fabrics, and have few reports on waterproof and oil-resistant microfibers.
Using bio-based finishing agent, the deionized water, non-ionic surfactant and cationic surfactant are stirred until completely dissolved, biomass modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid and potassium persulfate are added, and the reaction is obtained to obtain a bio-based finishing agent, which is mixed with a crosslinking agent, and is sorted onto the microfiber products by one-immersion and rolling method, and is cured by ultraviolet rays to obtain a product with good waterproof and anti-fouling effect and water washing resistance.
It has achieved good waterproof and anti-fouling effect and water washing resistance without affecting the feel of the fabric. It can withstand the waterproofness of the family after 20 washes.
Smart Images
Figure CN120059059A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a bio-based finishing agent and a waterproof and stain-proof finishing method for ultra-fine fiber products, belonging to the technical field of functional finishing of fiber products. Background Art
[0002] Ultra-fine fibers have better wearing properties than conventional polyester fibers, such as moisture absorption, air permeability, soft handfeel, elasticity, fluffiness and floating feeling, etc., and are thus loved by people. Textile fabrics with waterproof and stain-proof functions can not only improve the service performance of home textile products, such as outdoor hiking clothes, tents, etc., but also provide protection for people in some special occupational environments, such as fire-fighting clothes, sanitation clothes, protective supplies, etc.
[0003] Based on environmental protection and safety considerations, fluorinated long-chain waterproof finishing agents have been gradually phased out. Currently, the fluorine-free waterproof agents on the market mainly include alkane long-chain waterproof agents (such as paraffin emulsions), polyurethane-based and silicone-based waterproof agents, and there are several prominent problems: One is that the waterproof products have poor washability and are prone to the phenomenon of reduced waterproof effect; The second is the poor versatility of the products, with high requirements for the cleanliness of the processed fabrics, being difficult to be applied to thin fabrics, and there are few reports on waterproof and oil-proof functional ultra-fine fibers. Summary of the Invention
[0004] In view of this, the present application first provides a bio-based finishing agent, which not only has good compatibility but also has good waterproof and stain-proof properties.
[0005] Specifically, the present application is realized through the following scheme: A bio-based finishing agent is obtained by stirring deionized water, a non-ionic surfactant, and a cationic surfactant until completely dissolved, then heating to 65 - 75 °C and adding biomass-modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid, and potassium persulfate for reaction. The addition molar ratio of the biomass-modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid, and potassium persulfate is 1 - 3:4 - 6:1 - 3:4 - 6:0.4 - 1.
[0006] Furthermore, The non-ionic surfactant is any one of Tween 80, polyoxyethylene fatty alcohol ether, and detergent 6501.
[0007] The cationic surfactant is any one of dodecyl dimethyl benzyl ammonium chloride, cetyl trimethyl ammonium bromide, and polyquaternium-10.
[0008] The mass percentages of nonionic surfactants and cationic surfactants in the entire bio-based finishing agent are 1-3% and 1-3% respectively, the mass percentage of deionized water is 60-80%, and the rest are biomass modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid, and potassium persulfate.
[0009] The finishing agent provided in the above scheme is a bio-based waterproof and oil-proof finishing agent, which uses biomass-modified guar gum as a functional monomer and adopts a microemulsion polymerization method to prepare a guar gum-based polyacrylate emulsion. Combined with a cross-linking agent, it can be used in the finishing of ultrafine fiber fabrics. After finishing, the fabric is then cured by ultraviolet light. While not affecting the feel of the fabric, it has good waterproof and anti-fouling effects and water washability, and the water washability is improved. The waterproofness does not decrease after 20 home washes.
[0010] The applicant also provides the above-mentioned bio-based finishing agent for use in ultra-fine fiber products, namely: A method for waterproofing and antifouling finishing of ultrafine fiber products, comprising the following steps: Step 1: Wash and then dry the microfiber products to be processed.
[0011] The specific washing process is: first use 2g / L neutral detergent as the detergent, immerse and wash in a water bath at 80-100°C for 30-60 minutes, then take out and wash thoroughly with deionized water, and dry.
[0012] Step 2: prepare a cross-linking agent and the bio-based finishing agent of the above scheme respectively, and mix the bio-based finishing agent and the cross-linking agent to obtain a stable emulsion.
[0013] The cross-linking agent is prepared by the following method: adding 1-5% by mass of catechin condensed tannin into deionized water, stirring thoroughly to dissolve, adding 0.2-1% by mass of nano silicon dioxide and 1-5% by mass of sericin powder, stirring magnetically for 30 minutes, reacting in a water bath at 20-40° C. for 0.5-2 hours, and cooling to obtain the cross-linking agent.
[0014] In the stable emulsion, the added mass percentage of the cross-linking agent is 1-5%, the added mass percentage of the bio-based finishing agent is 5-50%, and the rest is deionized water.
[0015] Step 3: Use a dip-and-roll method to apply the stable emulsion obtained in step 2 to the microfiber product, with a rolling excess of 70-100%, dry it, and then cure it with ultraviolet light to obtain the finished product. The drying temperature is 70-80°C, and the drying time is 1-5 minutes. The ultraviolet curing conditions are: ultraviolet irradiation intensity is 40-45.0W / m 2 , irradiation time 1 to 6 hours.
[0016] The above-mentioned solution is to mix the prepared bio-based finishing agent with a cross-linking agent to obtain a padding liquor, which is padded onto superfine fiber products such as polyester fabrics. This can achieve a good waterproof and anti-fouling effect on ultra-thin fabrics and has good washability, enabling the finished fabric obtained by finishing to withstand 20 times of home laundering. Description of the Drawings
[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a comparison chart of the particle sizes of the bio-based finishing agent and the cross-linking agent in the present application; Figure 2 It is a scanning electron microscope image of the fabric before and after finishing in the present application. Detailed Embodiments
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the following will further elaborate on the technical solutions of the present application in combination with specific cases in the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the technical solutions of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.
[0020] Testing Methods: Dilution Stability: Take about 1 mL of the emulsion, dilute it 10 times with deionized water, seal it and let it stand for 72 h, and observe whether the emulsion has delamination or precipitation.
[0021] Storage Stability and Centrifugal Stability: Measured according to GB / T 11543-2008 "Testing Methods for the Characteristics of Medium and High Viscosity Emulsions and Evaluation Methods for Their Emulsifying Ability" of surfactants.
[0022] Solid Content: Accurately weigh 2.0000 g of the emulsion (weight denoted as m 1 ), pour it into a watch glass, place it in a constant temperature drying oven, dry it to a constant weight at 120 °C, and weigh its weight as m 2 after cooling to room temperature in a desiccator. Calculate the solid content W according to the following formula.
[0023] W = m 2 / m 1 × 100.
[0024] Particle size: An aqueous emulsion solution with a mass fraction of 0.5% was ultrasonically dispersed for 5 min, and at room temperature, the particle size of the emulsion was measured using a nano particle size and zeta potential analyzer.
[0025] The waterproofness test was carried out according to "Testing and Evaluation of Waterproof Performance of Textiles - Spray Test" (GB / T 4745 - 2012) to test the waterproof performance of textiles. The higher the grade, the better the performance.
[0026] The anti - fouling property was tested according to "Testing and Evaluation of Anti - fouling Performance of Textiles - Part 1: Resistance to Soiling" (GB / T 30159.1 - 2013). In addition to the high - salt thin - state soy sauce specified in the standard, corn oil was selected for the same test. The higher the grade, the better the performance.
[0027] The hand - feel test was carried out with reference to the AATCC EP5 - 2011 Fabric Hand Evaluation Procedure. The treated specimen was compared with the original specimen, and the sensory grade was described according to the change in hand - feel. Grade 1 means no different feeling; Grade 2 means a slight different feeling; Grade 3 means a moderate different feeling; Grade 4 means an obvious difference is felt.
[0028] Example 1
[0029] In this example, the preparation of the bio - based finishing agent was carried out as follows: In a four - necked flask equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer, 68.7 mL of deionized water, 4% (mass fraction) of Tween 80 and 5% of cetyltrimethylammonium bromide were added. Stir at room temperature on a magnetic stirrer until completely dissolved, then disperse for 1 min on a homogenizer, and then slowly heat up to 75 °C with a stirring rate of 300 r / min. 5.5 g of modified guar gum, 7.5 g of methyl methacrylate, 3.2 g of butyl acrylate, 7.4 g of acrylic acid and 1.7 g of potassium persulfate were added in sequence and reacted for 3 h to obtain the bio - based finishing agent.
[0030] The obtained bio - based finishing agent stably meets the above standards, is uniform and does not delaminate, with a particle size of 184 nm and a PDI of 15.1%.
[0031] Example 1 - 1
[0032] In this example, the preparation of the bio - based finishing agent was carried out as follows: In a four-necked flask equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer, 68.7 mL of deionized water and cetyltrimethylammonium bromide with mass fractions of 1%, 2%, 3%, 4% and 5% were added. Stir at room temperature on a magnetic stirrer until completely dissolved, disperse for 1 min on a homogenizer, then slowly heat up to 75 °C, with a stirring rate of 300 r / min. Sequentially add 5.5 g of modified guar gum, 7.5 g of methyl methacrylate, 3.2 g of butyl acrylate, 7.4 g of acrylic acid and 1.7 g of potassium persulfate, and react for 3 h to obtain the bio-based finishing agent.
[0033] The effects of different addition amounts of cationic surfactants on the bio-based finishing agent are shown in Table 1.
[0034] Table 1: Effects of the addition amount of cationic surfactant on the bio-based finishing agent 。
[0035] As can be seen from Table 1, in the case of only containing cationic surfactants, when the mass fraction of dodecyldimethylbenzylammonium chloride is 5%, the average particle size of the emulsion is 208 nm, the PDI is 29.5, and the uniformity is worse than that of Example 1 with a particle size of 184 nm and a PDI of 15.1%. As the mass fraction of dodecyldimethylbenzylammonium chloride decreases, the average particle size and PDI gradually increase. This is because in the preparation system of the bio-based finishing agent of the present application, the cationic surfactant can adsorb at the oil-water interface, reducing the surface tension of the interface. When the concentration reaches the critical micelle concentration, micelles are formed. However, if the mass fraction of the cationic surfactant is relatively low (such as 1% in Table 1), it will lead to insufficient emulsification, the particle size distribution becomes wider, and larger aggregates are formed in the emulsion. However, after the bio-based finishing agent stands still at room temperature for 60 days, the emulsion shows stratification, indicating that the emulsion stability of dodecyldimethylbenzylammonium chloride is poor. This is mainly because in the oil-in-water emulsion, the cationic emulsifier is easily affected by anionic impurities in water, reducing the stability of the emulsion.
[0036] To improve the stability of the bio-based finishing agent, the particle size and stability of the emulsion after adding non-ionic surfactants with different mass percentages were discussed when the mass fraction of dodecyldimethylbenzylammonium chloride was 5%, as shown in Examples 1-2 specifically.
[0037] Examples 1-2
[0038] The preparation of the bio-based finishing agent was carried out in this example, and the method is as follows: In a four-necked flask equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer, 68.7 mL of deionized water, cetyltrimethylammonium bromide with a mass fraction of 5%, and Tween 80 with mass fractions of 1%, 2%, 3%, and 5% were added. Stir at room temperature on a magnetic stirrer until completely dissolved, disperse for 1 min on a homogenizer, then slowly heat up to 75 °C, with a stirring rate of 300 r / min. Sequentially add 5.5 g of modified guar gum, 7.5 g of methyl methacrylate, 3.2 g of butyl acrylate, 7.4 g of acrylic acid, and 1.7 g of potassium persulfate, and react for 3 h to obtain a bio-based finishing agent.
[0039] The effects of different dosages (mass fractions) of non-ionic surfactants on the bio-based finishing agent are shown in Table 2.
[0040] Table 2: Effects of the dosage of non-ionic surfactant on the bio-based finishing agent 。
[0041] It can be seen from Table 2 that as the mass fraction of emulsifier Tween 80 increases, the particle size of the emulsion gradually decreases. When the mass fraction of emulsifier Tween 80 is 4%, the average particle size of the emulsion is 184 nm, and the particle size distribution is relatively uniform. After the emulsion stands at room temperature for 60 days, when the emulsifier dosage is 4% (i.e., Example 1), the emulsion does not stratify. Tween 80 is a non-ionic surfactant and does not adsorb ions in water at the water-oil interface, which is beneficial to improving the stability of the emulsion interface, making the emulsion distribution more uniform and the stability better. After the emulsifier dosage exceeds 4%, both the average particle size and PDI distribution increase slightly, indicating that it has exceeded the critical micelle concentration, and increasing the dosage has little effect on the emulsion. Therefore, 4% is considered the best.
[0042] Since the modified guar gum has a quaternary ammonium salt structure and carries a positive charge, it is easy to precipitate with anionic emulsifiers. Therefore, in this case, the cationic surfactant dodecyl dimethyl benzyl ammonium chloride and the non-ionic surfactant Tween 80 are selected together to improve the stability of the finishing solution.
[0043] In summary, in the preparation system of the bio-based finishing agent in this case, it is appropriate to use a combination of non-ionic surfactants and cationic surfactants. In the feeding amount of the bio-based finishing agent, when the mass fraction of the non-ionic surfactant in the total bio-based finishing agent is maintained at 4-5%, and the mass fraction of the cationic surfactant in the total bio-based finishing agent is maintained at 4-5%, and the addition amount of Tween 80 is 4% and the addition amount of dodecyl dimethyl benzyl ammonium chloride is 5% is the best.
[0044] Example 2
[0045] In this example, the preparation of the cross-linking agent was carried out: Add 3.0 g of catechin condensed tannin to 93 mL of deionized water in a beaker. After stirring well to dissolve, add 0.8 g of nano-silica and 2.5 g of sericin powder, stir magnetically for 30 min, and react for 1 h under the condition of 900 revolutions per minute in a water bath heating. After cooling, a crosslinking agent is obtained.
[0046] The influence of the reaction temperature (i.e., the water bath temperature) on the particle size and stability of the crosslinking agent is shown in Table 3.
[0047] Table 3: Influence of different reaction temperatures on the crosslinking agent 。
[0048] It can be seen from Table 3 that as the reaction temperature increases, the particle size and PDI of the crosslinking agent show a trend of first decreasing and then increasing, and the solid content gradually increases with the increase of the reaction temperature. When the reaction temperature is 30 °C, the particle size of the crosslinking agent is 169 nm, the PDI is 13.3, and the emulsion is uniform without precipitation. Silica is dispersed in the aqueous solution of polymeric tannin and sericin powder, and as the temperature rises, the reaction begins, gradually forming a uniform and stable emulsion. However, after the reaction temperature exceeds 30 °C, the particle size and PDI of the crosslinking agent increase, and even stratification and precipitation occur. This is because when the reaction temperature is too high, the solubility of silica in water decreases, catechin condensed tannin and sericin agglomerate, and crosslink with each other under the action of high temperature to form a network structure with a relatively large molecular weight. Silica cannot be dispersed evenly, so the particle size of the crosslinking agent becomes larger, and even precipitation occurs, and the stability decreases. Considering the solid content and particle size comprehensively, it is determined that the reaction temperature is preferably 30 °C.
[0049] Example 3
[0050] The method for waterproof and stain-proof finishing of ultrafine fiber products using the bio-based finishing agent in this example is as follows: Step 1, add 68.7 mL of deionized water, 4% (mass fraction) of Tween 80 and 5% (mass fraction) of cetyltrimethylammonium bromide into a four-necked flask equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer. Stir at room temperature on a magnetic stirrer until completely dissolved, disperse for 1 min on a homogenizer, then slowly heat up to 75 °C, with a stirring rate of 300 r / min, and sequentially add 5.5 g of modified guar gum, 7.5 g of methyl methacrylate, 3.2 g of butyl acrylate, 7.4 g of acrylic acid and 1.7 g of potassium persulfate, and react for 3 h to obtain a bio-based finishing agent.
[0051] Step 2, mix the bio-based finishing agent with water to prepare a waterproof finishing solution. The mass percentage of the bio-based finishing agent is shown in Table 4, and the balance is deionized water (that is, when the bio-based finishing agent takes a value of 5%, the addition amount of deionized water is 95%). Finish on ultrafine polyester fabric by the one-dip-one-roll method, with a liquor pickup of 90%, dry at 80 °C for 20 min, 45.0 W / m2 Ultraviolet curing for 5 h.
[0052] When no crosslinking agent is added, the effects of bio-based finishing agents with different concentrations on the waterproof and oil-proof properties and washability of fabrics are shown in Table 4.
[0053] Table 4: Waterproof and oil-proof properties and water washability of fabrics with different concentrations of bio-based finishing agents .
[0054] It can be seen from Table 4 that the effects of the mass percentage of the bio-based finishing agent on the waterproof and anti-fouling properties and water washability of the fabric are mainly as follows: as the mass percentage of the bio-based finishing agent increases, the waterproofness, anti-fouling property and water washability of the fabric are significantly improved. This is because modified guar gum, as a derivative of a natural polymer, has good film-forming properties and can improve the adhesion and mechanical properties between acrylate waterproof agents and fabrics. When the dosage of the bio-based finishing agent is 30%, the waterproofness of the fabric reaches 4 - 5 levels, but the anti-fouling property and water washability still need to be improved. Therefore, the bio-based finishing agent and the crosslinking agent are used in combination, and the specific situation is as follows.
[0055] Example 4
[0056] In this example, the bio-based finishing agent and the crosslinking agent are used for the waterproof and oil-proof finishing of microfiber products: Step 1: In a four-necked flask equipped with a reflux condenser, a stirrer, a dropping funnel and a thermometer, add 68.7 mL of deionized water, 4% Tween 80 and 5% cetyltrimethylammonium bromide by mass fraction. Stir at room temperature on a magnetic stirrer until completely dissolved, then disperse for 1 min on a homogenizer, and then slowly heat up to 75 °C with a stirring rate of 300 r / min. Add 5.5 g of modified guar gum, 7.5 g of methyl methacrylate, 3.2 g of butyl acrylate, 7.4 g of acrylic acid and 1.7 g of potassium persulfate in sequence, and react for 3 h to obtain the bio-based finishing agent.
[0057] Step 2: Add 3.0 g of catechin condensed tannin to 90 mL of deionized water in a beaker. After fully stirring and dissolving, add 4.5 g of nano-silica and 2.5 g of sericin powder, stir magnetically for 30 min, and react at 800 r / min under a water bath heating at 30 °C for 1 h. After cooling, obtain the crosslinking agent.
[0058] Step 3: Prepare a waterproof finishing solution from the bio-based finishing agent, the crosslinking agent and water, where the mass percentage of the bio-based finishing agent is 30%, and the crosslinking agent is as shown in Table 5, and the balance is deionized water (that is, when the crosslinking agent value is 0, the deionized water value is 70%; when the crosslinking agent value is 2%, the deionized water value is 68%). Finish it on the microfiber polyester fabric by the one-dip-one-roll method, with a liquor pickup of 90%, dry at 80 °C for 20 min, 45.0 W / m2 Ultraviolet curing for 5 h.
[0059] Table 5: Waterproof and stain-proof properties and washability of fabrics with different concentrations of crosslinking agent .
[0060] Figure 1 Particle size distribution diagrams of the bio-based finishing agent and crosslinking agent prepared in this example: A single peak appears near 200 nm for both the bio-based finishing agent and the crosslinking agent, and the particle size distribution is concentrated, indicating that the emulsion particles of the prepared bio-based finishing agent and crosslinking agent are relatively uniform. The actually measured particle sizes of the bio-based finishing agent and the crosslinking agent are 184 nm and 169 nm respectively, and the PDI is 15.1% and 13.3%.
[0061] It can be seen from Table 5 that the influence of the mass percentage of the crosslinking agent on the waterproof and stain-proof properties and washability of the fabric is mainly manifested as follows: with the increase of the mass percentage of the crosslinking agent, the stain-proof property and washability of the fabric are significantly improved. When the dosage of the crosslinking agent is 8%, the waterproof property of the fabric is grade 5, the stain-proof property is grade 4 - 5, and the waterproof property is grade 4 after 20 washes. This is because both catechin condensed tannin and sericin are natural high molecular polymers containing phenolic hydroxyl groups and hydroxyl groups. Under certain humid and hot conditions, they react with themselves or with the fabric to form a film, which has good adhesion to the fabric and improves the washability; adding nano-silica can create a rough structure on the fabric surface, further improving the stain-proof property of the fabric. After the dosage of the crosslinking agent exceeds 8%, the hand feeling of the fabric changes slightly. Therefore, the optimal dosage of the crosslinking agent is 8%.
[0062] Catechin condensed tannin is prone to condensation reaction under ultraviolet initiation. Therefore, the influence of ultraviolet curing time on the waterproof property of the fabric was discussed and compared with the conventional baking process (150 °C, 2 min). The results are shown in Table 6.
[0063] Table 6: Influence of ultraviolet curing time on the waterproof, stain-proof and washable properties of fabrics .
[0064] It can be seen from Table 6 that the influence of ultraviolet irradiation time on the waterproof and stain-proof properties and washability of the fabric is mainly manifested as follows: The ultraviolet curing effect is better than the conventional high-temperature baking process. With the extension of the irradiation time, the stain-proof property and washability of the fabric are significantly improved. When the ultraviolet irradiation is 5 h, the waterproof property of the fabric is grade 5, the stain-proof property is grade 4 - 5, and the waterproof property is grade 4 after 20 washes. This is because compared with the conventional baking process, the high-energy particles in ultraviolet light can initiate the oxidation reaction of catechin condensed tannin. Catechin condensed tannin forms a water-insoluble and ethanol-insoluble high molecular compound under ultraviolet initiation. This compound not only has good adhesion to the fabric, but also has waterproof and anti-corrosion functions, so the washability of the fabric is improved.
[0065] Table 7: Comparison of waterproof performance between the waterproof superfine polyester fabric obtained after organizing this case and the ordinary superfine polyester fabric .
[0066] The surface change of the fabric before and after organizing is as Figure 2 shown: The surface of the unorganized fabric (i.e., ordinary superfine polyester) is smooth, without adhering to other substances, and the yarn arrangement is relatively loose; for the waterproof superfine polyester obtained by organizing Example 4 (8% cross-linking agent), a layer of mucous membrane covers its fabric surface, indicating that the waterproof finishing agent adheres to the fabric surface. At the same time, granular polymers can also be seen on the fabric surface. This is the micro-nano rough structure formed by the aggregation of nano-silica on the fabric surface, which increases the water contact angle and improves the waterproof and antifouling performance of the fabric.
[0067] The results in Table 7 also prove that: for the polyester fabric organized by this case, there are good waterproof and oil-proof effects on the ultra-thin fabrics, which can withstand 20 times of household washing, and its waterproof and antifouling properties have not decreased. The biological finishing agent and cross-linking agent used are both made of natural polymer materials, which are green and environmentally friendly. And ultraviolet curing treatment is adopted in the composite finishing process, which improves the reaction efficiency of catechin condensed tannin and the fabric.
[0068] The above-described embodiments only represent several feasible implementation modes of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. The embodiments are not intended to limit the protection scope in the claims of the present invention. For those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made. Any equivalent implementation or change made without departing from the present invention should be included in the technology of the present invention.
Claims
1. A bio-based finishing agent, characterized in that: A certain amount of nonionic surfactant and cationic surfactant are added to deionized water and stirred until completely dissolved, then the temperature is raised to 65-75°C, biomass-modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid and potassium persulfate are added, and the bio-based finishing agent is obtained by reaction, wherein the molar ratio of the biomass-modified guar gum, methyl methacrylate, butyl acrylate, acrylic acid and potassium persulfate is 1-3:3-6:3-6:1-3:1-3.
2. A bio-based finishing agent according to claim 1, characterized in that: The nonionic surfactant is any one of Tween 80, fatty alcohol polyoxyethylene ether and alkyl polyglycoside.
3. The bio-based finishing agent according to claim 1, characterized in that: The cationic surfactant is any one of dodecyl dimethyl benzyl ammonium chloride, polyhexamethylene biguanide hydrochloride, and didecyl methyl hydroxyethyl ammonium chloride.
4. The bio-based finishing agent according to claim 1, characterized in that: The added mass percentages of nonionic surfactant and cationic surfactant are 1-3% and 1-3% respectively.
5. A method for waterproofing and antifouling of ultrafine fiber products, characterized in that: Here are the steps: Step 1, stirring a crosslinking agent, deionized water and the bio-based finishing agent according to claim 1 to obtain a stable emulsion; Step 2: using a dipping and rolling method, the obtained stable emulsion is arranged on the ultrafine fiber product, with a rolling surplus of 70-100%, and after drying, ultraviolet curing treatment is performed to obtain the finished product.
6. The method for waterproofing and antifouling of a superfine fiber product according to claim 5, characterized in that: The cross-linking agent is prepared by the following method: adding 1-5% by mass of catechin condensed tannin into deionized water, stirring thoroughly to dissolve, adding 0.2-1% by mass of nano silicon dioxide and 1-5% by mass of sericin powder, stirring magnetically for 30 minutes, reacting in a water bath at 20-40° C. for 0.5-2 hours, and cooling to obtain the cross-linking agent.
7. The method for waterproofing and antifouling of a superfine fiber product according to claim 5, characterized in that: In the stable emulsion, the added mass percentage of the cross-linking agent is 1-5%, the added mass percentage of the bio-based finishing agent is 5-50%, and the rest is deionized water.
8. The method for waterproofing and antifouling of a superfine fiber product according to claim 5, characterized in that: In step 2, the drying temperature is 70-80° C. and the drying time is 5-10 minutes.
9. The method for waterproofing and antifouling of ultrafine fiber products according to claim 5, characterized in that: In step 3, the UV curing treatment conditions are: UV irradiation intensity 40-45.0W / m 2 , irradiation time 1 to 6 hours.
10. The method for waterproofing and antifouling of a superfine fiber product according to claim 5, characterized in that: The ultrafine fiber product is polyester fabric.