Anti-aging wear-resistant tarpaulin and preparation method thereof
By using composite antioxidants and other specific materials in the tarp, the aging and durability of the tarp is solved, achieving higher anti-aging, wear and waterproofing properties, extending service life and improving the overall strength and waterproofing of the material.
Patent Information
- Application Number
- CN202411850864.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-07
- Estimated Expiration
- Not applicable · inactive patent
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of textiles, in particular to an anti-aging and wear-resistant tarpaulin and a preparation method thereof. Background Art
[0002] Tarpaulin, as a widely used protective and shading material, plays an indispensable role in many fields. This durable and flexible fabric is usually woven from high-strength synthetic fibers such as polyester, nylon or polypropylene. It has excellent waterproof, windproof, sun-proof and wear-resistant properties, and can provide reliable protection for objects or people in harsh natural environments. In the industrial field, tarpaulin is often used as a warehouse cover, equipment protection cover or temporary enclosure on a construction site; in agriculture, tarpaulin is an ideal choice for greenhouses, temporary sunshade and rain protection for crops, and for building simple sheds in animal husbandry; in logistics and transportation, tarpaulin is also an ideal choice for building simple sheds in the logistics industry. In the transportation industry, tarpaulins are used to fix and protect loaded goods to prevent them from being damaged by wind, sun, rain and snow during transportation. In addition, when natural disasters occur, tarpaulins can be used to build temporary shelters to provide temporary living and shelter for the affected people. Tarpaulins have become an indispensable practical material in modern society due to their excellent physical properties, wide applicability and convenient operability. However, as time goes by, tarpaulins will age, such as becoming hard, brittle, and discolored, resulting in a decrease in their performance and a significant shortening of their service life. Tarpaulins are also susceptible to wear and tear during use, and their durability will be seriously affected. In view of this, we propose an anti-aging and wear-resistant tarpaulin and a preparation method thereof. Summary of the invention
[0003] The object of the present invention is to provide an anti-aging and wear-resistant tarpaulin and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above object, the present invention provides an anti-aging and wear-resistant tarpaulin, comprising the following components: 1-3 parts by weight of a composite antioxidant, 75-85 parts by weight of polyester fiber, 9-13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 0.8-1.4 parts by weight of nano-silicon dioxide and 0.1-0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:0.5-2.
[0005] Preferably, the preparation method of the composite antioxidant is as follows: Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane and stir to dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, after the reaction is completed, naturally cool it to room temperature, then use a separatory funnel to extract to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant.
[0006] Syringic acid is a natural phenolic acid with carboxylic acid functional groups and phenolic hydroxyl groups, which makes it have a strong hydrogen supply capacity and can effectively remove free radicals, thus showing good antioxidant properties. It has antioxidant effects. Since many aging processes are caused by oxidation reactions, it also has good anti-aging effects. However, syringic acid is easily decomposed under conditions such as light and high temperature, which will affect its long-term effect. Therefore, 2-(trifluoromethyl)sulfonamideethanol is added to improve its stability. Since 2-(trifluoromethyl)sulfonamideethanol contains trifluoromethyl, sulfonamide and hydroxyl groups, the hydroxyl groups of 2-(trifluoromethyl)sulfonamideethanol can undergo esterification reaction with the carboxyl group of syringic acid, thereby improving the stability of syringic acid. Chemical stability. In addition, the polar groups on 2-(trifluoromethyl)sulfonamideethanol can interact with the polar ester groups of polyester fibers, which helps to improve the dispersibility and compatibility of 2-(trifluoromethyl)sulfonamideethanol in polyester fibers. The fluorine, nitrogen and oxygen elements on 2-(trifluoromethyl)sulfonamideethanol have strong electronegativity and can form hydrogen bonds with the hydrogen atoms on the polyester chain, thereby enhancing the intermolecular force of the polyester fiber and thereby improving the wear resistance of the overall material. In addition, since the trifluoromethyl group has strong hydrophobicity, it can increase the hydrophobicity of the polyester fiber surface, reduce the adhesion of water and dirt, improve its waterproofness, and also have a self-cleaning effect.
[0007] Preferably, the mass ratio of dichloromethane to syringic acid is 5-10:1.
[0008] Preferably, the added amount of p-toluenesulfonic acid accounts for 1-5% of the mass of syringic acid.
[0009] Preferably, the water bath temperature of the water bath is 60-80° C., and the reflux time is 4-6 h.
[0010] On the other hand, the present invention provides a method for preparing an anti-aging and wear-resistant tarpaulin, which is used for an anti-aging and wear-resistant tarpaulin as described in any one of the above, comprising the following steps: The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature and screw speed are set. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation and dried in a hot air circulation oven to obtain a tarpaulin.
[0011] Preferably, the extrusion temperature is 260-280° C., and the screw speed is maintained at 200-300 rpm.
[0012] Preferably, the cooling rate is set at 50-80°C / min.
[0013] Preferably, the temperature of the hot air circulation oven is 70-80°C, and the drying time is 24-48h.
[0014] Preferably, the tarpaulin has a thickness of 0.2-0.8 mm.
[0015] Compared with the prior art, the present invention has the following beneficial effects: In the anti-aging and wear-resistant tarpaulin and its preparation method, a composite antioxidant is used to improve the anti-aging performance of the tarpaulin through the antioxidant effect of natural syringic acid, and 2-(trifluoromethyl)sulfonamideethanol is used to overcome the instability of syringic acid. At the same time, the polar groups of 2-(trifluoromethyl)sulfonamideethanol form hydrogen bonds with polyester fibers, and hydrogen bonds can form physical crosslinks between molecules, thereby improving the stability and mechanical strength of the overall structure of the tarpaulin, thereby enhancing the wear resistance of the polyester fibers, and utilizing the strong hydrophobicity of the trifluoromethyl group to increase the hydrophobicity of the polyester fiber surface, thereby improving the waterproofness and increasing the self-cleaning effect. DETAILED DESCRIPTION
[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0017] The invention discloses an anti-aging and wear-resistant tarpaulin, comprising the following components: 1-3 parts by weight of a composite antioxidant, 75-85 parts by weight of polyester fiber, 9-13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 0.8-1.4 parts by weight of nano silicon dioxide and 0.1-0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:0.5-2.
[0018] Embodiment 1: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 1-3 parts by weight of composite antioxidant, 85 parts by weight of polyester fiber, 13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 1.4 parts by weight of nano silicon dioxide and 0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol at a mass ratio of 1:0.5-2; the mass ratio of dichloromethane to syringic acid is 10:1; the amount of p-toluenesulfonic acid added is 5% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0019] Embodiment 2: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 3 parts by weight of composite antioxidant, 85 parts by weight of polyester fiber, 13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 1.4 parts by weight of nano silicon dioxide and 0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol at a mass ratio of 1:1.3; the mass ratio of dichloromethane to syringic acid is 10:1; the amount of p-toluenesulfonic acid added is 5% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0020] Embodiment 3: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 3 parts by weight of composite antioxidant, 85 parts by weight of polyester fiber, 13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 1.4 parts by weight of nano silicon dioxide and 0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:2; the mass ratio of dichloromethane to syringic acid is 10:1; the amount of p-toluenesulfonic acid added is 5% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0021] Embodiment 4: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 3 parts by weight of composite antioxidant, 75 parts by weight of polyester fiber, 9 parts by weight of 2-hydroxy-4-methoxybenzophenone, 0.8 parts by weight of nano silicon dioxide and 0.1 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:2; the mass ratio of dichloromethane to syringic acid is 5:1; the amount of p-toluenesulfonic acid added is 1% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0022] Embodiment 5: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 1 part by weight of composite antioxidant, 85 parts by weight of polyester fiber, 13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 1.4 parts by weight of nano silicon dioxide and 0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:2; the mass ratio of dichloromethane to syringic acid is 10:1; the amount of p-toluenesulfonic acid added is 5% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0023] Embodiment 6: An anti-aging and wear-resistant tarpaulin and a preparation method thereof, comprising the following steps: Prepare components: 2 parts by weight of composite antioxidant, 85 parts by weight of polyester fiber, 13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 1.4 parts by weight of nano silicon dioxide and 0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:2; the mass ratio of dichloromethane to syringic acid is 10:1; the amount of p-toluenesulfonic acid added is 5% of the mass of syringic acid; Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane to stir and dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, the water bath temperature is 80° C., the reflux time is 5 hours, after the reaction is completed, naturally cool it to room temperature, then extract it with a separatory funnel to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant; The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature is set at 270°C and the screw speed is set at 300rpm. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set at 80°C / min, and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation, and dried in a hot air circulation oven to obtain a tarpaulin.
[0024] Comparative Example 1: The method of Example 3 was adopted without adding a composite antioxidant.
[0025] Comparative Example 2: The method of Example 3 was adopted, and syringic acid was directly used without compounding syringic acid with 2-(trifluoromethyl)sulfonamide ethanol.
[0026] Comparative Example 3: The method of Example 3 was adopted, and 2-(trifluoromethyl)sulfonamideethanol was directly used without compounding 2-(trifluoromethyl)sulfonamideethanol with syringic acid.
[0027] The present invention adopts a composite antioxidant to prepare an anti-aging and wear-resistant tarpaulin, wherein the performance index inspection items and inspection standards of the anti-aging and wear-resistant tarpaulin are as follows: Place the tarpaulin in a xenon lamp aging test box, set the radiation intensity to 0.55W / m²@340nm, maintain at 65±3℃, maintain the relative humidity at 50%, and age for 24h. Test the tensile strength and elongation at break of the tarpaulin before and after aging. Refer to GB / T3923.1-2013 "Tensile properties of textile fabrics Part 1: Determination of breaking strength and elongation at break (strip method)" to calculate the change rate of tensile strength and elongation at break before and after aging. The change rate of aging tensile strength = (tensile strength before aging - tensile strength after aging) / tensile strength before aging × 100%, the change rate of aging elongation at break = (elongation at break before aging - elongation at break after aging) / elongation at break before aging × 100%.
[0028] The tarpaulin was cut into a circular specimen with a diameter of 38 mm, and the specimen was fixed on the fixture of the Martindale abrasion tester. A piece of standard abrasive cloth was placed under the instrument. A load of 12 kPa was selected, and the number of cycles was 10,000. The instrument was started to test, and the test was stopped after the predetermined cycle was completed. The sample mass was weighed using an electronic balance, and the mass loss percentage of each sample was calculated. The mass loss percentage = (mass before cycle - mass after cycle) / mass before cycle × 100%.
[0029] The waterproof performance of the tarpaulin is tested according to GB / T 4744-2013 "Hydrostatic Pressure Method for Testing and Evaluation of Waterproof Performance of Textiles". The hydrostatic pressure test simulates the impact of rain or other water sources on the material by applying a certain water pressure on one side of the material, and observes whether there is water penetration on the other side. The test water pressure increase rate is 10kPa / min, and the hydrostatic pressure value is obtained.
[0030] According to the above standards, an anti-aging and wear-resistant tarpaulin prepared in the above Examples 1-6 and Comparative Examples 1-3 was tested, and the obtained data are shown in Table 1: Table 1 Performance data of Examples 1-6 and Comparative Examples 1-3 The above data fully show that compared with Comparative Examples 1-3, Examples 1-6 can fully show the effect of the composite antioxidant on the anti-aging, wear-resistant and waterproof properties of the anti-aging and wear-resistant tarpaulin.
[0031] Since the present invention adopts a composite antioxidant to prepare the anti-aging and wear-resistant tarpaulin, the performance of the anti-aging and wear-resistant tarpaulin is effectively improved by the composite antioxidant, as follows: It can be seen from Examples 1-3 that with the continuous increase in the proportion of the composite antioxidant component, the anti-aging, wear-resistant and waterproof properties of the tarpaulin are significantly improved, indicating that syringic acid provides a good antioxidant effect, and 2-(trifluoromethyl)sulfonamideethanol enhances the chemical stability of syringic acid through its structural characteristics, and improves the dispersibility and compatibility in polyester fibers. At the same time, the polar groups on 2-(trifluoromethyl)sulfonamideethanol help to enhance the intermolecular forces within the material, thereby improving the physical properties of the overall material, and improving the waterproof performance through hydrophobic fluorine, so the anti-aging, wear-resistant and waterproof properties of the tarpaulin are significantly improved.
[0032] It can be seen from Examples 3 and 4 that with the continuous changes in the content of other components, the anti-aging, wear-resistant and waterproof properties of the tarpaulin do not change significantly, indicating that small changes in other components within a certain range are not enough to significantly affect the anti-aging, wear-resistant and waterproof properties of the tarpaulin, and therefore there is no obvious change.
[0033] It can be seen from Examples 3, 5 and 6 that as the content of the composite antioxidant continues to change, the anti-aging, wear-resistant and waterproof properties of the tarpaulin continue to change, which means that a larger amount of effective ingredients can more effectively combat the material aging phenomenon caused by environmental factors. At the same time, due to the structural characteristics of 2-(trifluoromethyl)sulfonamide ethanol, it can not only help the chemical stability of syringic acid, but also directly contribute to the improvement of the surface properties of the material and the enhancement of the intermolecular force, thereby improving the wear resistance and anti-aging effects of the polyester fiber.
[0034] According to the above test experiments, the anti-aging and wear-resistant tarpaulin prepared according to Example 3 has the best performance, so Example 3 is taken as the best embodiment; By comparing Example 3 with Comparative Examples 1-3, it can be seen that: In comparative example 1, no composite antioxidant was added, and the anti-aging, wear resistance and waterproof performance of the tarpaulin were worse. Without the composite antioxidant, the ability to scavenge free radicals was lacking, causing the polyester fiber to be easily attacked by free radicals, resulting in chain breakage problems, which in turn affected its service life and physical properties. Therefore, the performance of the tarpaulin was significantly reduced.
[0035] In Comparative Example 2, syringic acid is directly used without being compounded with 2-(trifluoromethyl)sulfonamide ethanol. The anti-aging, wear-resistant and waterproof properties of the tarpaulin are poor. Since syringic acid is easily decomposed under light and high temperature conditions, its long-term effectiveness is limited, and thus the performance of the tarpaulin is significantly reduced.
[0036] In Comparative Example 3, 2-(trifluoromethyl)sulfonamideethanol was directly used without compounding 2-(trifluoromethyl)sulfonamideethanol with syringic acid. The anti-aging, wear-resistant and waterproof properties of the tarpaulin were worse. Although 2-(trifluoromethyl)sulfonamideethanol could enhance the surface properties and stability of the material, it did not have sufficient antioxidant activity to completely prevent the occurrence of the aging process. It lacked the antioxidant basic support provided by syringic acid. Therefore, in the absence of syringic acid as the main antioxidant, the performance of the tarpaulin was reduced.
[0037] In summary, by using an antioxidant composed of syringic acid and 2-(trifluoromethyl)sulfonamide ethanol, the tarpaulin can more effectively remove free radicals, thereby delaying the aging process of the material. This composite antioxidant not only provides immediate antioxidant protection, but also enhances the stability of syringic acid under different environmental conditions due to the action of 2-(trifluoromethyl)sulfonamide ethanol, making the antioxidant effect more lasting. The polar groups (such as hydroxyl groups and sulfonamide) in 2-(trifluoromethyl)sulfonamide ethanol can interact with the polar ester groups of polyester fibers, thereby enhancing the intermolecular forces within the material, thereby enhancing The overall strength and wear resistance of the material are increased. At the same time, since the trifluoromethyl contained in 2-(trifluoromethyl)sulfonamideethanol has strong hydrophobicity, it can increase the hydrophobic properties of the polyester fiber surface and reduce the adhesion of water and dirt, so that it can not only better resist the influence of moisture such as rain, but also maintain a clean state for a longer time, reducing maintenance costs. Moreover, syringic acid, as a natural phenolic acid, is widely available and relatively environmentally friendly. Combining it with 2-(trifluoromethyl)sulfonamideethanol not only retains the advantages of natural substances, but also utilizes the functional advantages of 2-(trifluoromethyl)sulfonamideethanol, achieving a balance between performance and environmental protection.
[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.
Claims
1. An anti-aging and wear-resistant tarpaulin, characterized in that: The invention comprises the following components: 1-3 parts by weight of a composite antioxidant, 75-85 parts by weight of polyester fiber, 9-13 parts by weight of 2-hydroxy-4-methoxybenzophenone, 0.8-1.4 parts by weight of nano silicon dioxide and 0.1-0.5 parts by weight of polyvinyl butyral; The composite antioxidant is surface-modified by syringic acid and 2-(trifluoromethyl)sulfonamide ethanol in a mass ratio of 1:0.5-2.
2. The anti-aging and wear-resistant tarpaulin according to claim 1, characterized in that: The preparation method of the composite antioxidant is as follows: Add syringic acid and 2-(trifluoromethyl)sulfonamide ethanol to a round-bottom flask equipped with a magnet, add dichloromethane and stir to dissolve, then add p-toluenesulfonic acid to the mixed solution, install a condenser on the round-bottom flask, transfer it to a water bath and heat it under reflux, after the reaction is completed, naturally cool it to room temperature, then use a separatory funnel to extract to obtain an organic phase, transfer the extracted organic phase to a flask of a rotary evaporator to evaporate the solvent, and obtain a composite antioxidant.
3. The anti-aging and wear-resistant tarpaulin according to claim 2, characterized in that: The mass ratio of the dichloromethane to syringic acid is 5-10:
1.
4. The anti-aging and wear-resistant tarpaulin according to claim 2, characterized in that: The added amount of the p-toluenesulfonic acid accounts for 1-5% of the mass of syringic acid.
5. The anti-aging and wear-resistant tarpaulin according to claim 2, characterized in that: The water bath temperature of the water bath pot is 60-80° C., and the reflux time is 4-6 hours.
6. A method for preparing an anti-aging and wear-resistant tarpaulin, used for preparing an anti-aging and wear-resistant tarpaulin according to any one of claims 1 to 5, characterized in that: The steps include: The polyester fiber, composite antioxidant, 2-hydroxy-4-methoxybenzophenone, nano-silica and polyvinyl butyral are added into a high-speed mixer and mixed evenly. The mixed raw materials are sent into a twin-screw extruder for melt extrusion. The extrusion temperature and screw speed are set. The extruded sheet is quickly cooled and solidified by a cooling roller. The cooling rate is set and then stretched by a traction device. A layer of polyvinyl chloride is coated on the cloth surface by impregnation and dried in a hot air circulation oven to obtain a tarpaulin.
7. The method for preparing an anti-aging and wear-resistant tarpaulin according to claim 6, characterized in that: The extrusion temperature is 260-280° C., and the screw speed is 200-300 rpm.
8. The method for preparing an anti-aging and wear-resistant tarpaulin according to claim 6, characterized in that: The cooling rate was set at 50-80°C / min.
9. The method for preparing an anti-aging and wear-resistant tarpaulin according to claim 6, characterized in that: The temperature of the hot air circulation oven is 70-80° C., and the drying time is 24-48 hours.
10. The method for preparing an anti-aging and wear-resistant tarpaulin according to claim 6, characterized in that: The tarpaulin has a thickness of 0.2-0.8 mm.