High-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber and its preparation process

Abstract

This invention relates to the field of base fabric technology, specifically to a high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers and its preparation process. Ethanolamine and pyruvic acid are used to separate eucalyptus lignin, resulting in ethanolamine-pyruvate-separated lignin with polyphenolic hydroxyl groups. Ethanolamine-pyruvate-separated lignin, gallic acid, and polyethyleneimine are used as a pretreatment solution. Antibacterial metal ion-composite ethanolamine-pyruvate-separated lignin is used as a filler. A protective finishing solution is prepared using bis-epoxy-terminated polydimethylsiloxane as a low surface energy monomer, epoxy-modified waterborne polyurethane as a film-forming agent, and water as a solvent. These components synergistically impart long-lasting antibacterial, UV-resistant, waterproof, and stain-resistant properties to the base fabric, significantly extending its service life.

Description

Technical Field

[0001] This invention relates to the field of base fabric technology, specifically to high-performance base fabrics made of aramid and ultra-high molecular weight polyethylene composite fibers and their preparation process. Background Technology

[0002] Aramid fibers and ultra-high molecular weight polyethylene fibers are widely used in bulletproof protection, special equipment, and high-performance industrial fabrics due to their excellent strength, modulus, abrasion resistance, and chemical stability. Compared with conventional polyester weft-knitted fabrics, warp-knitted fabrics made from aramid and ultra-high molecular weight polyethylene fibers with interlaced yarns achieve an ultra-lightweight structure while possessing mechanical properties superior to conventional polyester fabrics. Furthermore, they exhibit good flame-retardant properties without the need for flame-retardant chemical finishing, making them suitable for applications such as leather base fabrics in racing cars or sports cars.

[0003] However, aramid and ultra-high molecular weight polyethylene fibers exhibit strong surface chemical inertness and low interfacial bonding energy, leading to significant drawbacks when treated with conventional finishing solutions. On one hand, to improve the UV aging resistance of leather-based fabrics, existing technologies often employ organic UV absorbers or inorganic UV absorbers such as titanium dioxide and zinc oxide. However, most organic UV absorbers are fat-soluble compounds, posing potential health risks through skin contact or the food chain. Inorganic UV absorbers, on the other hand, have poor compatibility with fiber-based fabrics, easily migrating and shedding, resulting in insufficient durability. On the other hand, in terms of antibacterial construction, conventional antibacterial agents such as silver-based and quaternary ammonium salts also face problems such as poor wash resistance, weak durability, or potential biotoxicity, making it difficult to meet the safety, environmental protection, and long-lasting requirements of high-end textile fields such as automotive interiors. Summary of the Invention

[0004] The purpose of this invention is to provide a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber and its preparation process, so as to solve the problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The preparation process of high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers includes the following steps: S1: The base fabric is obtained by combining ultra-high molecular weight polyethylene fiber yarn and aramid yarn as warp and weft yarns and interlacing them. S2: A pretreatment solution was prepared by separating lignin, gallic acid, and polyethyleneimine using ethanolamine pyruvate; the washed base fabric was then immersed in the pretreatment solution, washed, and dried to obtain the pretreated base fabric. S3: Mix deionized water and penetrant, add double epoxy-terminated polydimethylsiloxane, perform a first ultrasonic dispersion treatment, add antibacterial metal ion composite lignin, perform a second ultrasonic dispersion, add epoxy-modified waterborne polyurethane emulsion, stir, and obtain the protective finishing liquid. S4: The pretreated base fabric is impregnated with a protective finishing liquid, baked, and dried to obtain a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fibers.

[0006] Furthermore, the ratio of ultra-high molecular weight polyethylene fiber yarn to aramid yarn in the warp yarn is 1:4; and the ratio of polyethylene fiber yarn to aramid yarn in the weft yarn is 1:6.

[0007] Furthermore, the working conditions for the impregnation treatment are: shaking at 25°C for 9 hours.

[0008] Furthermore, the working conditions for the first ultrasonic dispersion treatment are: time of 10 min, power of 600 W, and frequency of 40 kHz; the working conditions for the second ultrasonic dispersion treatment are: time of 20-30 min, power of 600 W, and frequency of 40 kHz.

[0009] Furthermore, the working conditions for the dip-rolling treatment are as follows: three dips and three rolls are used, the dip time is 1 minute, and the roll residue is 85%; the baking working conditions are as follows: the temperature is 130℃ and the time is 12-15 minutes.

[0010] Furthermore, the preparation of the pretreatment solution includes the following steps: Deionized water and tris(hydroxymethyl)aminomethane were mixed and the pH was adjusted to 8.5. Ethanolamine pyruvate was added to separate lignin, gallic acid, and polyethyleneimine. The mixture was stirred to obtain a pretreated solution.

[0011] Furthermore, the mass ratio of the sum of the lignin and gallic acid separated by ethanolamine pyruvate to the mass of polyethyleneimine is 1:1, and the mass ratio of the lignin and gallic acid separated by ethanolamine pyruvate is 1:3.

[0012] Furthermore, the preparation of lignin isolated from ethanolamine pyruvate includes the following steps: 1) Ethanolamine was added dropwise to pyruvate under stirring in an ice-water bath, and stirring was continued for 11-12 hours. The mixture was then rotary evaporated to obtain ethanolamine pyruvate. 2) Mix oven-dried wood powder and ethanolamine pyruvate, heat in an oil bath at 120°C for 35-45 minutes, add ethanol, stir for 30 minutes, vacuum filter, centrifuge, wash, freeze dry, and grind to obtain ethanolamine pyruvate separated lignin.

[0013] Furthermore, the preparation of lignin separated by antibacterial metal ion complex ethanolamine pyruvate includes the following steps: Ethanolamine pyruvate lignin separation solution and tris(hydroxymethyl)aminomethane solution were mixed and the pH was adjusted to 8. One of copper chloride solution and zinc chloride solution was added, stirred, filtered, washed and dried to obtain antibacterial metal ion composite ethanolamine pyruvate lignin separation solution.

[0014] Furthermore, using deionized water as a solvent, the protective finishing solution comprises: 3-5 g / L of antibacterial metal ion complex ethanolamine pyruvate separated lignin, 11 g / L of bisepoxy-terminated polydimethylsiloxane, 50 g / L of epoxy-modified waterborne polyurethane emulsion, and 0.2 g / L of penetrant.

[0015] Furthermore, the preparation of epoxy-modified waterborne polyurethane includes the following steps: Polytetrahydrofuran diol and 2,2-dimethylolbutyric acid were mixed, heated to 110°C and held for 2 hours, then cooled to 60°C. Isophorone diisocyanate was added, the temperature was raised to 80°C and held for 2 hours, then cooled to 60°C. Trimethylolpropane and epoxy resin E-51 were added and held for 3 hours, then the temperature was lowered to 45°C. Triethylamine was added and the temperature was held for 30 minutes, then lowered to 30°C. Deionized water was added, and the mixture was emulsified to obtain an epoxy-modified waterborne polyurethane emulsion with a solid content of 35%.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber and its preparation process. Through process and composition design, a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber with anti-ultraviolet aging, environmental protection, antibacterial, waterproof and stain-resistant properties is prepared.

[0017] In this invention, lignin, a biomass raw material, is used as an antioxidant and ultraviolet absorber. Ethanolamine and pyruvate are combined as a proton-type ionic liquid for separating eucalyptus lignin, thus preparing ethanolamine pyruvate lignin-separating solution with polyphenolic hydroxyl groups. Ethanolamine pyruvate lignin-separating solution, gallic acid, and polyethyleneimine are combined as a pretreatment solution. The Michael addition and Schiff base reaction between the three components are utilized to adhere to the base fabric surface. By controlling the ratio, a large number of amino groups are introduced into the base fabric surface, thereby improving the ultraviolet resistance of the base fabric and the bonding strength between the base fabric and the finishing solution.

[0018] To further improve the waterproof and antibacterial properties of the base fabric, lignin separated by ethanolamine pyruvate was combined with copper chloride or zinc chloride to construct a copper-lignin polyphenol network or a zinc-lignin polyphenol network, resulting in an antibacterial metal ion composite lignin separated by ethanolamine pyruvate. Using this antibacterial metal ion composite lignin separated by ethanolamine pyruvate as a filler, bis-epoxy-terminated polydimethylsiloxane as a low surface energy monomer, epoxy-modified waterborne polyurethane as a film-forming agent, and water as a solvent, a protective finishing solution was prepared. The low surface energy characteristics of the antibacterial metal ion composite lignin and bis-epoxy-terminated polydimethylsiloxane synergistically endow the base fabric surface with excellent hydrophobic and stain-resistant properties. The introduction of epoxy-modified waterborne polyurethane imparts good flexibility and interfacial adhesion to the film layer. Several functional components form a complex cross-linked network structure, synergistically endowing the base fabric with long-lasting antibacterial, UV-resistant, waterproof, and stain-resistant properties, significantly extending the service life of the base fabric. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0022] Example 1: The preparation process of high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers includes the following steps: S1: The base fabric is obtained by combining ultra-high molecular weight polyethylene fiber yarn and aramid yarn as warp and weft yarns and interlacing them. The ratio of ultra-high molecular weight polyethylene fiber yarn to aramid yarn in the warp yarn is 1:4; the ratio of polyethylene fiber yarn to aramid yarn in the weft yarn is 1:6. S2: A pretreatment solution was prepared by separating lignin, gallic acid, and polyethyleneimine using ethanolamine pyruvate; the washed base fabric was then immersed in the pretreatment solution, washed, and dried to obtain the pretreated base fabric. The preparation of the pretreatment solution includes the following steps: Mix 400 mL of deionized water and 0.48 g of tris(hydroxymethyl)aminomethane, adjust the pH to 8.5, add 0.1 g of ethanolamine pyruvate to separate lignin, 0.3 g of gallic acid, and 0.4 g of polyethyleneimine, stir, and obtain the pretreated solution; The working conditions for the impregnation treatment are: shaking at 25℃ for 9 hours; The preparation of lignin separated by ethanolamine pyruvate includes the following steps: 1) Under ice-water bath stirring conditions, 3 mol of ethanolamine was added dropwise to 1 mol of pyruvate, and stirring was continued for 11 h. The mixture was then rotary evaporated to obtain ethanolamine pyruvate. 2) Mix 5g of oven-dried wood powder and 45mL of ethanolamine pyruvate, heat in an oil bath at 120℃ for 35min, add 45mL of ethanol, stir for 30min, vacuum filter, centrifuge, wash, freeze dry, grind to obtain ethanolamine pyruvate separated lignin. S3: Mix deionized water and penetrant, add double epoxy-terminated polydimethylsiloxane, perform a first ultrasonic dispersion treatment, add antibacterial metal ion composite lignin, perform a second ultrasonic dispersion, add epoxy-modified waterborne polyurethane emulsion, stir, and obtain the protective finishing liquid. The working conditions for the first ultrasonic dispersion treatment are: time 10 min, power 600 W, frequency 40 kHz; the working conditions for the second ultrasonic dispersion treatment are: time 20 min, power 600 W, frequency 40 kHz. Using deionized water as a solvent, the protective finishing solution consists of: 3 g / L of antibacterial metal ion composite ethanolamine pyruvate separated lignin, 11 g / L of bisepoxy-terminated polydimethylsiloxane, 50 g / L of epoxy-modified waterborne polyurethane emulsion, and 0.2 g / L of penetrant. S4: The pretreated base fabric is impregnated with a protective finishing liquid, baked, and dried to obtain a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber. The working conditions for the immersion and rolling process are as follows: three immersions and three rollings are used, the immersion time is 1 minute, and the roll residue is 85%; the baking working conditions are as follows: the temperature is 130℃ and the time is 12 minutes. The preparation of the antibacterial metal ion complex ethanolamine pyruvate-separated lignin includes the following steps: Mix 1g of ethanolamine pyruvate to separate lignin with 200mL of 10mmol / L tris(hydroxymethyl)aminomethane solution, adjust the pH to 8, add 200mL of 0.3mol / L copper chloride solution, stir, filter, wash, and dry to obtain antibacterial metal ion composite ethanolamine pyruvate to separate lignin.

[0023] Example 2: The preparation process of high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers includes the following steps: S1: The base fabric is obtained by combining ultra-high molecular weight polyethylene fiber yarn and aramid yarn as warp and weft yarns and interlacing them. The ratio of ultra-high molecular weight polyethylene fiber yarn to aramid yarn in the warp yarn is 1:4; the ratio of polyethylene fiber yarn to aramid yarn in the weft yarn is 1:6. S2: A pretreatment solution was prepared by separating lignin, gallic acid, and polyethyleneimine using ethanolamine pyruvate; the washed base fabric was then immersed in the pretreatment solution, washed, and dried to obtain the pretreated base fabric. The preparation of the pretreatment solution includes the following steps: Mix 400 mL of deionized water and 0.48 g of tris(hydroxymethyl)aminomethane, adjust the pH to 8.5, add 0.1 g of ethanolamine pyruvate to separate lignin, 0.3 g of gallic acid, and 0.4 g of polyethyleneimine, stir, and obtain the pretreated solution; The working conditions for the impregnation treatment are: shaking at 25℃ for 9 hours; The preparation of lignin separated by ethanolamine pyruvate includes the following steps: 1) Under ice-water bath stirring conditions, 3 mol of ethanolamine was added dropwise to 1 mol of pyruvate, and stirring was continued for 11.5 h. The mixture was then rotary evaporated to obtain ethanolamine pyruvate. 2) Mix 5g of oven-dried wood powder and 45mL of ethanolamine pyruvate, heat in an oil bath at 120℃ for 40min, add 45mL of ethanol, stir for 30min, vacuum filter, centrifuge, wash, freeze dry, grind to obtain ethanolamine pyruvate separated lignin. S3: Mix deionized water and penetrant, add double epoxy-terminated polydimethylsiloxane, perform a first ultrasonic dispersion treatment, add antibacterial metal ion composite lignin, perform a second ultrasonic dispersion, add epoxy-modified waterborne polyurethane emulsion, stir, and obtain the protective finishing liquid. The working conditions for the first ultrasonic dispersion treatment are: time 10 min, power 600 W, frequency 40 kHz; the working conditions for the second ultrasonic dispersion treatment are: time 25 min, power 600 W, frequency 40 kHz. Using deionized water as a solvent, the protective finishing solution consists of: 4 g / L of antibacterial metal ion complex ethanolamine pyruvate separated lignin, 11 g / L of double epoxy-terminated polydimethylsiloxane, 50 g / L of epoxy-modified waterborne polyurethane emulsion, and 0.2 g / L of penetrant. S4: The pretreated base fabric is impregnated with a protective finishing liquid, baked, and dried to obtain a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber. The working conditions for the immersion and rolling process are as follows: three immersions and three rollings are used, the immersion time is 1 minute, and the roll residue is 85%; the baking working conditions are as follows: the temperature is 130℃ and the time is 14 minutes. The preparation of the antibacterial metal ion complex ethanolamine pyruvate-separated lignin includes the following steps: Mix 1g of ethanolamine pyruvate to separate lignin with 200mL of 10mmol / L tris(hydroxymethyl)aminomethane solution, adjust the pH to 8, add 200mL of 0.3mol / L copper chloride solution, stir, filter, wash, and dry to obtain antibacterial metal ion composite ethanolamine pyruvate to separate lignin.

[0024] Example 3: The preparation process of high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers includes the following steps: S1: The base fabric is obtained by combining ultra-high molecular weight polyethylene fiber yarn and aramid yarn as warp and weft yarns and interlacing them. The ratio of ultra-high molecular weight polyethylene fiber yarn to aramid yarn in the warp yarn is 1:4; the ratio of polyethylene fiber yarn to aramid yarn in the weft yarn is 1:6. S2: A pretreatment solution was prepared by separating lignin, gallic acid, and polyethyleneimine using ethanolamine pyruvate; the washed base fabric was then immersed in the pretreatment solution, washed, and dried to obtain the pretreated base fabric. The preparation of the pretreatment solution includes the following steps: Mix 400 mL of deionized water and 0.48 g of tris(hydroxymethyl)aminomethane, adjust the pH to 8.5, add 0.1 g of ethanolamine pyruvate to separate lignin, 0.3 g of gallic acid, and 0.4 g of polyethyleneimine, stir, and obtain the pretreated solution; The working conditions for the impregnation treatment are: shaking at 25℃ for 9 hours; The preparation of lignin separated by ethanolamine pyruvate includes the following steps: 1) Under ice-water bath stirring conditions, 3 mol of ethanolamine was added dropwise to 1 mol of pyruvate, and stirring was continued for 12 h. The mixture was then rotary evaporated to obtain ethanolamine pyruvate. 2) Mix 5g of oven-dried wood powder and 45mL of ethanolamine pyruvate, heat in an oil bath at 120℃ for 45min, add 45mL of ethanol, stir for 30min, vacuum filter, centrifuge, wash, freeze dry, grind to obtain ethanolamine pyruvate separated lignin. S3: Mix deionized water and penetrant, add double epoxy-terminated polydimethylsiloxane, perform a first ultrasonic dispersion treatment, add antibacterial metal ion composite lignin, perform a second ultrasonic dispersion, add epoxy-modified waterborne polyurethane emulsion, stir, and obtain the protective finishing liquid. The working conditions for the first ultrasonic dispersion treatment are: time 10 min, power 600 W, frequency 40 kHz; the working conditions for the second ultrasonic dispersion treatment are: time 30 min, power 600 W, frequency 40 kHz. Using deionized water as a solvent, the protective finishing solution consists of: 5 g / L of antibacterial metal ion complex ethanolamine pyruvate separated lignin, 11 g / L of diepoxy-terminated polydimethylsiloxane, 50 g / L of epoxy-modified waterborne polyurethane emulsion, and 0.2 g / L of penetrant. S4: The pretreated base fabric is impregnated with a protective finishing liquid, baked, and dried to obtain a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber. The working conditions for the immersion and rolling treatment are as follows: three immersions and three rollings are used, the immersion time is 1 minute, and the roll residue is 85%; the baking working conditions are as follows: the temperature is 130℃ and the time is 15 minutes. The preparation of the antibacterial metal ion complex ethanolamine pyruvate-separated lignin includes the following steps: Mix 1g of ethanolamine pyruvate to separate lignin with 200mL of 10mmol / L tris(hydroxymethyl)aminomethane solution, adjust the pH to 8, add 200mL of 0.3mol / L copper chloride solution, stir, filter, wash, and dry to obtain antibacterial metal ion composite ethanolamine pyruvate to separate lignin.

[0025] Comparative Example 1: Using Example 3 as the control group, alkali lignin (471003: Sigma-Aldrich (Shanghai) Trading Co., Ltd.) was used to replace ethanolamine pyruvate for lignin separation, while other processes were normal.

[0026] Comparative Example 2: With Example 3 as the control group, the mass ratio of the sum of the lignin and gallic acid separated by ethanolamine pyruvate to the mass of polyethyleneimine was 1:0.5, that is, the mass of polyethyleneimine was 0.2g, and other processes were normal.

[0027] Comparative Example 3: Using Example 3 as the control group, the protective finishing solution was replaced with polydimethylsiloxane (P433351, Aladdin reagent) instead of the cyclooxygen-terminated polydimethylsiloxane, and other processes were normal.

[0028] In Examples 1-3, the mass ratio of the sum of the masses of lignin and gallic acid separated by ethanolamine pyruvate to the mass of polyethyleneimine was 1:1, and the mass ratio of lignin to gallic acid separated by ethanolamine pyruvate was 1:3. In the examples and comparative examples, the base fabric is a plain weave fabric with a warp density of 80 threads / 10cm and a weft density of 75 threads / 10cm. The preparation of epoxy-modified waterborne polyurethane in the examples and comparative examples includes the following steps: 20g of polytetrahydrofuran glycol and 1.14g of 2,2-dimethylolbutyric acid were mixed, heated to 110℃ and held for 2 hours, then cooled to 60℃. 21.16g of isophorone diisocyanate was added, the temperature was raised to 80℃ and held for 2 hours, then cooled to 60℃. 0.91g of trimethylolpropane and 0.68g of epoxy resin E-51 were added and held for 3 hours, then cooled to 45℃. 0.78g of triethylamine was added and held for 30 minutes, then cooled to 30℃. Deionized water was added, and the mixture was emulsified to obtain an epoxy-modified waterborne polyurethane emulsion with a solid content of 35%.

[0029] Sources of raw materials used (for illustrative purposes only): Ultra-high molecular weight polyethylene fiber yarn (HS800, 800D, 8001, Hanvo), aramid yarn (1414, 1000D, strength ≥19cN / dtex, breaking strength ≥245N, limiting oxygen index ≥29%), polyethyleneimine (MW600, ≥99%), pyruvic acid (≥98%), oven-dried wood flour (60-100 mesh eucalyptus powder), penetrant JFC (fatty alcohol polyoxyethylene ether, nonionic), diepoxy-terminated polydimethylsiloxane (industrial grade, MW2000, epoxy value 0.1-0.2eq / 100g), polytetrahydrofuran glycol (PTMG2000), epoxy resin E-51: commercially available.

[0030] Performance testing: The base fabrics prepared in the examples and comparative examples were tested. Referring to "Colorfastness to Household and Commercial Washing: Accelerated Method", the samples were tested for water wash resistance. Each wash lasted 5 minutes and constituted a cycle test. After 15 cycles, the base fabric was dried to obtain the test sample. Hydrophobicity: The water contact angle of the test sample was measured using a contact angle meter to characterize the hydrophobicity. Antibacterial properties: The antibacterial rate of the test sample was tested using the plate method, with Staphylococcus aureus as the test species. UV aging resistance: The sample was irradiated with 365nm UV light for 48 hours, and the initial water contact angle was compared with that of the test sample. If the difference was ≤1°, it was considered qualified; otherwise, it was unqualified. The results are shown in Table 1. Table 1 This invention provides a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber and its preparation process. Through process and composition design, an environmentally friendly, antibacterial, UV-resistant and hydrophobic high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber is prepared.

[0031] As shown in Table 1, the water contact angle of the base fabrics prepared in Examples 1-3 is greater than 120°, the antibacterial rate is higher than 99%, and the water contact angle changes by ≤1° after 48h of UV irradiation, demonstrating excellent hydrophobic, antibacterial and UV aging resistance properties. Comparing Example 3 with Comparative Example 1, using alkali lignin instead of ethanolamine pyruvate to separate lignin resulted in a significant decrease in antibacterial rate to 84.2% due to the low phenolic hydroxyl content and weak metal complexation ability of alkali lignin, and also failed the UV aging resistance test. Comparing Example 3 with Comparative Example 2, reducing the amount of PEI resulted in insufficient cross-linking of the pretreatment layer and weak interfacial bonding, leading to a decrease in both antibacterial rate and UV aging resistance after multiple water washes. Comparing Example 3 with Comparative Example 3, using ordinary polydimethylsiloxane instead of bis(epoxy)-terminated polydimethylsiloxane resulted in a decrease in water contact angle and UV aging resistance after multiple water washes due to the lack of chemical cross-linking.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the present invention's specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A process for preparing high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fibers, characterized in that, Includes the following steps: S1: The base fabric is obtained by combining ultra-high molecular weight polyethylene fiber yarn and aramid yarn as warp and weft yarns and interlacing them. S2: A pretreatment solution was prepared by separating lignin, gallic acid, and polyethyleneimine using ethanolamine pyruvate; the washed base fabric was then immersed in the pretreatment solution, washed, and dried to obtain the pretreated base fabric. S3: Mix deionized water and penetrant, add double epoxy-terminated polydimethylsiloxane, perform a first ultrasonic dispersion treatment, add antibacterial metal ion composite lignin, perform a second ultrasonic dispersion, add epoxy-modified waterborne polyurethane emulsion, stir, and obtain the protective finishing liquid. S4: The pretreated base fabric is impregnated with a protective finishing liquid, baked, and dried to obtain a high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fibers.

2. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The ratio of ultra-high molecular weight polyethylene fiber yarn to aramid yarn in the warp yarn is 1:4; the ratio of polyethylene fiber yarn to aramid yarn in the weft yarn is 1:

6.

3. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The working conditions for the immersion treatment in S2 are: oscillation at 25℃ for 9 hours; the working conditions for the first ultrasonic dispersion treatment in S3 are: time for 10 minutes, power for 600W, and frequency for 40kHz; the working conditions for the second ultrasonic dispersion treatment are: time for 20-30 minutes, power for 600W, and frequency for 40kHz.

4. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The working conditions for the S4 immersion and rolling process are as follows: three immersions and three rollings are used, the immersion time is 1 minute, and the rolling residue rate is 85%; the baking working conditions are as follows: the temperature is 130℃ and the time is 12-15 minutes.

5. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The preparation of the pretreatment solution includes the following steps: Deionized water and tris(hydroxymethyl)aminomethane were mixed and the pH was adjusted to 8.

5. Ethanolamine pyruvate was added to separate lignin, gallic acid, and polyethyleneimine. The mixture was stirred to obtain a pretreated solution.

6. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, In the pretreatment solution, the mass ratio of the sum of lignin and gallic acid separated by ethanolamine pyruvate to polyethyleneimine is 1:1, and the mass ratio of lignin and gallic acid separated by ethanolamine pyruvate is 1:

3.

7. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The preparation of lignin separated by ethanolamine pyruvate includes the following steps: 1) Ethanolamine was added dropwise to pyruvate under stirring in an ice-water bath, and stirring was continued for 11-12 hours. The mixture was then rotary evaporated to obtain ethanolamine pyruvate. 2) Mix the oven-dried wood powder and ethanolamine pyruvate, keep in an oil bath at 120℃ for 35-45 min, add ethanol, stir for 30 min, vacuum filter, centrifuge, wash, freeze dry, grind to obtain ethanolamine pyruvate separated lignin.

8. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, The preparation of the antibacterial metal ion complex ethanolamine pyruvate-separated lignin includes the following steps: Ethanolamine pyruvate-separated lignin and tris(hydroxymethyl)aminomethane solution were mixed and the pH was adjusted to 8. One of copper chloride solution and zinc chloride solution was added, stirred, filtered, washed, and dried to obtain antibacterial metal ion composite ethanolamine pyruvate-separated lignin.

9. The preparation process of the high-performance base fabric of aramid and ultra-high molecular weight polyethylene composite fiber according to claim 1, characterized in that, Using deionized water as a solvent, the protective finishing solution consists of: 3-5 g / L of antibacterial metal ion complex ethanolamine pyruvate separated lignin, 11 g / L of bisepoxy-terminated polydimethylsiloxane, 50 g / L of epoxy-modified waterborne polyurethane emulsion, and 0.2 g / L of penetrant.

10. A high-performance base fabric made of aramid and ultra-high molecular weight polyethylene composite fibers, characterized in that, It is prepared according to any one of the preparation processes described in claims 1-9.

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