Toughened anti-aging composite plastic woven cloth and preparation method thereof

Abstract

The application discloses a kind of toughening material aging-resistant composite plastic woven cloth, raw material includes by mass fraction: homopolymer polypropylene 60-100 parts, random copolymer polypropylene 30-50 parts, maleic anhydride grafted polypropylene 1-2 parts, polyisobutylene masterbatch PW60 10-20 parts, sodium carbonate 1-3 parts, sodium silicate 1-3 parts, calcium nitrate 1-2 parts, activated carbon nanotube 1-2 parts, toughening carbon fiber 4-14 parts, color masterbatch 3-6 parts, heat stabilizer 3-6 parts, lubricant 3-6 parts;Activated carbon nanotube is carbon nanotube placed in surfactant solution and handled to obtain;Toughening carbon fiber is in the surface of carbon fiber deposition silica, then add fly ash, desulfurization gypsum, silica fume and polyvinyl alcohol are mixed and calcined to obtain.The application discloses the preparation method of the above-mentioned toughening material aging-resistant composite plastic woven cloth.

Description

Technical Field

[0001] This invention relates to the field of woven fabric technology, and in particular to a toughened and aging-resistant composite plastic woven fabric and its preparation method. Background Technology

[0002] Plastics stand out in the field of new materials due to their abundant raw material sources, ease of manufacturing, simple processing, significant energy savings and investment benefits, wide variety, good performance, and extensive applications.

[0003] Polypropylene is a translucent, semi-crystalline thermoplastic with high strength, good insulation, low water absorption, high heat distortion temperature, low density, and high crystallinity. It is the main raw material for making woven fabrics. Plastic woven fabric is made from polypropylene as the main raw material. The process involves melt extrusion molding of the polypropylene into films using a single-screw extruder, followed by cutting, hot stretching, and shaping to produce flat filaments. These flat filaments are then woven into tubular or flat-width woven fabrics using a cylindrical braiding machine. Finally, the woven fabric is coated with a coating material through melt extrusion to form a coated fabric.

[0004] Plastic woven fabric has a wide range of applications. Currently, it is mainly used for agricultural product packaging, cement bag packaging, food packaging, geotechnical engineering, tourism transportation, and flood control materials. With the rapid development of industrial and agricultural production, the demand for plastic woven fabric is increasing, thus requiring higher strength from the fabric.

[0005] Existing woven fabrics not only have poor weather resistance, but also tend to age, become less tough and weaker due to high summer temperatures and strong sunlight, resulting in a short service life, which wastes resources and pollutes the environment. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a toughened and aging-resistant composite plastic woven fabric and its preparation method.

[0007] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include, by weight: 60-100 parts homopolymer polypropylene, 30-50 parts random copolymer polypropylene, 1-2 parts maleic anhydride grafted polypropylene, 10-20 parts polyisobutylene masterbatch PW60, 1-3 parts sodium carbonate, 1-3 parts sodium silicate, 1-2 parts calcium nitrate, 1-2 parts activated carbon nanotubes, 4-14 parts toughened carbon fiber, 3-6 parts color masterbatch, 3-6 parts heat stabilizer, and 3-6 parts lubricant.

[0008] Preferably, the activated carbon nanotubes are obtained by treating carbon nanotubes in a surfactant solution.

[0009] Preferably, the toughened carbon fiber is obtained by depositing silica on the surface of carbon fiber, adding fly ash, desulfurized gypsum, silica fume and polyvinyl alcohol, and then calcining.

[0010] Preferably, the heat stabilizer is at least one of di-n-octyltin dimercaptoacetate, di-n-butyltin dodecyl mercaptoacetate, and di-n-octyltin β-mercaptopropionic acid.

[0011] Preferably, the lubricant is at least one of stearamide, erucamide, ricinoleamide, N,N'-ethylene bis-stearamide, and N,N'-ethylene ricinoleic acid amide.

[0012] Preferably, activated carbon nanotubes are prepared by the following steps: adding carbon nanotubes and surfactants to water and stirring for 1-2 hours, ultrasonically dispersing for 10-30 minutes at an ultrasonic frequency of 5-12 kHz, and spray drying to obtain activated carbon nanotubes.

[0013] Preferably, the surfactant is at least one of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, polyvinyl alcohol, and polystyrene.

[0014] More preferably, the mass ratio of carbon nanotubes to surfactant is 5-10:1-2.

[0015] Preferably, the toughened carbon fiber is prepared by the following steps: carbon fiber is added to dimethyl sulfoxide, methyltrimethoxysilane is added under stirring, saturated ammonia water is added and stirring is continued, washed, and vacuum dried to obtain pretreated carbon fiber; fly ash, desulfurized gypsum, and silica fume are mixed evenly, water and polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 50-60℃ for 10-30 min, heated at 150-160℃ for 1-2 h, and calcined at 800-1000℃ for 10-20 min to obtain toughened carbon fiber.

[0016] Toughened carbon fiber is made by bonding silica to the surface of carbon fiber, and then attaching fly ash, desulfurized gypsum and silica fume to the surface of the carbon fiber. After sintering, a porous structure containing silicon and calcium is formed on the surface of the carbon fiber, which greatly enhances the strength of the carbon fiber.

[0017] More preferably, the mass ratio of carbon fiber, methyltrimethoxysilane, and saturated ammonia is 20-40:1-5:1-3; and the mass ratio of fly ash, desulfurized gypsum, silica fume, and polyvinyl alcohol is 1-2:0.1-1:0.1-1:0.1-1.

[0018] The above-mentioned method for preparing toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0019] S1. Homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, color masterbatch, heat stabilizer, and lubricant are mixed evenly. Toughened carbon fiber is added and stirred evenly. The mixture is melt-extruded, cut, longitudinally stretched, heat-set, cooled, and woven to obtain a prefabricated woven layer.

[0020] S2. Homopolymer polypropylene, toughened carbon fiber, activated carbon nanotubes, color masterbatch, heat stabilizer and lubricant are mixed evenly to obtain toughened layer premix.

[0021] S3. Mix random copolymer polypropylene, color masterbatch, heat stabilizer and lubricant evenly to obtain nonwoven fabric layer premix;

[0022] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer to obtain a toughened and aging-resistant composite plastic woven fabric.

[0023] Preferably, the mass ratio of toughened carbon fiber used in the prefabricated braided layer to toughened carbon fiber used in the toughening layer premix is ​​1-4:1-3.

[0024] Preferably, the mass ratio of homopolymer polypropylene used in the prefabricated braided layer to homopolymer polypropylene used in the toughening layer premix is ​​3-5:3-5.

[0025] Preferably, the mass ratio of the masterbatch used in the prewoven layer, the masterbatch used in the toughening layer premix, and the masterbatch used in the nonwoven layer premix is ​​1-2:1-2:1-2.

[0026] Preferably, the mass ratio of the heat stabilizer used in the prewoven layer, the heat stabilizer used in the toughening layer premix, and the heat stabilizer used in the nonwoven layer premix is ​​1-2:1-2:1-2.

[0027] Preferably, the mass ratio of the lubricant used in the prewoven layer, the lubricant used in the toughening layer premix, and the lubricant used in the nonwoven layer premix is ​​1-2:1-2:1-2.

[0028] Beneficial effects:

[0029] This invention incorporates toughening carbon fibers into both the pre-woven layer and the toughening layer premix, and then casts the toughening layer premix onto the pre-woven layer, significantly improving the toughness of the woven fabric. This results in a significant increase in toughness even with a small amount of toughening carbon fibers added to the toughening layer premix.

[0030] This invention incorporates toughening carbon fibers into woven fabrics. With the assistance of maleic anhydride-grafted polypropylene, the intercalation strength between the homopolymer polypropylene and the toughening carbon fibers is extremely high. This not only improves the dispersion of the toughening carbon fibers in the homopolymer polypropylene matrix and greatly enhances the tensile strength of the woven fabric through synergistic effects, but also enables the woven fabric to form a high-strength calcium silicate component in a humid environment, effectively strengthening the structure of the woven fabric. This not only fully utilizes the toughening effect of carbon fibers but also provides excellent aging resistance.

[0031] Activated carbon nanotubes can be uniformly dispersed in homopolymer polypropylene and, when combined with toughened carbon fibers, effectively improve the bond between the fiber and the matrix, and exhibit a significant slip hardening effect between the fiber and the matrix, thereby improving the tensile strain capacity of the woven fabric. At the same time, the activated carbon nanotubes and toughened carbon fibers bridge each other, filling and inhibiting the expansion of pores and cracks inside the matrix at multiple scales, enhancing the strength and ductility of the woven fabric, and exhibiting excellent toughening effect.

[0032] This invention provides a simple, convenient, and widely applicable production process for plastic woven fabric. It not only effectively enhances the structure of the woven fabric, extending its service life, but also significantly prevents aging. The resulting woven fabric is strong, durable, has good toughening properties, high mechanical strength, and strong stability, making it less susceptible to premature damage from environmental changes and thus extending its lifespan, giving it a highly competitive market position. Attached Figure Description

[0033] Figure 1 This is a comparison chart of the tensile strength and tensile strength retention rate after aging of the composite plastic woven fabrics obtained in Example 5 and Comparative Examples 1-3.

[0034] Figure 2 This is a comparison chart of the weight loss rate of the composite plastic woven fabrics obtained in Example 5 and Comparative Examples 1-3 under different aging times in a thermo-oxidative aging environment. Detailed Implementation

[0035] The present invention will be further explained below with reference to specific embodiments.

[0036] Example 1

[0037] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include: 60 kg of homopolymer polypropylene, 30 kg of random copolymer polypropylene, 1 kg of maleic anhydride grafted polypropylene, 10 kg of polyisobutylene masterbatch PW60, 1 kg of sodium carbonate, 1 kg of sodium silicate, 1 kg of calcium nitrate, 1 kg of activated carbon nanotubes, 4 kg of toughened carbon fiber, 3 kg of color masterbatch, 3 kg of di-n-octyltin dithiocarbamate, and 3 kg of stearamide.

[0038] Activated carbon nanotubes are prepared by the following steps: 5 kg of carbon nanotubes and 1 kg of sodium dodecylbenzenesulfonate are added to 20 kg of water, stirred at 1000 r / min for 1 h, ultrasonically dispersed for 10 min at an ultrasonic frequency of 5 kHz, and spray dried to obtain activated carbon nanotubes.

[0039] Toughened carbon fiber is prepared by the following steps: 20 kg of carbon fiber is added to 100 kg of dimethyl sulfoxide, and 1 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 1 hour, 1 kg of saturated ammonia water is added and stirring is continued for 10 minutes. The mixture is soaked in ethanol for 10 hours, filtered, washed once with ethanol, and vacuum dried to obtain pretreated carbon fiber. 1 kg of fly ash, 0.1 kg of desulfurized gypsum, and 0.1 kg of silica fume are mixed evenly, 2 kg of water and 0.1 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 50℃ for 10 minutes, added to a calcining furnace, heated at 150℃ for 1 hour, heated to 800℃ and calcined for 10 minutes, and cooled to room temperature to obtain toughened carbon fiber.

[0040] The preparation method of the above-mentioned toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0041] S1. Mix 30kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1kg color masterbatch, 1kg isooctyl thioglycolate di-n-octyltin, and 1kg stearamide evenly. Add 2kg toughened carbon fiber and stir evenly. Feed the mixture into an extruder for melt extrusion. The extruder barrel temperature is 170℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 120℃. Set it in a heat-setting roller at 85℃ for 1 minute. After cooling, weave the mixture into a pre-woven layer using a circular loom.

[0042] S2. Mix 30kg homopolymer polypropylene, 2kg toughened carbon fiber, activated carbon nanotubes, 1kg color masterbatch, 1kg isooctyl thiodimer di-n-octyltin, and 1kg stearamide evenly to obtain a toughening layer premix.

[0043] S3. Mix random copolymer polypropylene, 1 kg masterbatch, 1 kg isooctyl thiosulfate di-n-octyltin, and 1 kg stearamide evenly to obtain nonwoven fabric layer premix.

[0044] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, a toughened and aging-resistant composite plastic woven fabric is obtained.

[0045] Example 2

[0046] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include: 100 kg of homopolymer polypropylene, 50 kg of random copolymer polypropylene, 2 kg of maleic anhydride grafted polypropylene, 20 kg of polyisobutylene masterbatch PW60, 3 kg of sodium carbonate, 3 kg of sodium silicate, 2 kg of calcium nitrate, 2 kg of activated carbon nanotubes, 14 kg of toughened carbon fiber, 6 kg of color masterbatch, 6 kg of dioctyl tin di-n-thiomeryl ester, and 6 kg of N,N'-ethylene bis-stearamide.

[0047] Activated carbon nanotubes are prepared by the following steps: 10 kg of carbon nanotubes and 2 kg of polyvinyl alcohol are added to 40 kg of water, stirred at 2000 r / min for 2 h, ultrasonically dispersed for 30 min at an ultrasonic frequency of 12 kHz, and spray dried to obtain activated carbon nanotubes.

[0048] Toughened carbon fiber is prepared by the following steps: 40 kg of carbon fiber is added to 150 kg of dimethyl sulfoxide, and 5 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 2 hours, 3 kg of saturated ammonia water is added and stirring is continued for 30 minutes. The mixture is soaked in ethanol for 20 hours, filtered, washed with ethanol 5 times, and vacuum dried to obtain pretreated carbon fiber. 2 kg of fly ash, 1 kg of desulfurized gypsum, and 1 kg of silica fume are mixed evenly, 4 kg of water and 1 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 60℃ for 30 minutes, added to a calcining furnace, heated at 160℃ for 2 hours, heated to 1000℃ and calcined for 20 minutes, and cooled to room temperature to obtain toughened carbon fiber.

[0049] The preparation method of the above-mentioned toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0050] S1. Mix 50kg of homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 2kg of color masterbatch, 2kg of isooctyl thioglycolate di-n-octyltin, and 2kg of N,N'-ethylene bis-stearamide evenly. Add 8kg of toughened carbon fiber and stir evenly. Send the mixture to an extruder for melt extrusion. The extruder barrel temperature is 190℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 135℃. Set it in a heat-setting roller at 92℃ for 4 minutes. After cooling, weave the mixture on a circular loom to obtain a pre-woven layer.

[0051] S2. Mix 50kg homopolymer polypropylene, 6kg toughened carbon fiber, activated carbon nanotubes, 2kg color masterbatch, 2kg isooctyl 2-dimercaptoacetate di-n-octyltin, and 2kg N,N'-ethylene bis-stearamide evenly to obtain a toughening layer premix.

[0052] S3. Mix random copolymer polypropylene, 2kg color masterbatch, 2kg isooctyl dithiocarbamate di-n-octyltin, and 2kg N,N'-ethylene bis-stearamide evenly to obtain nonwoven fabric layer premix.

[0053] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, a toughened and aging-resistant composite plastic woven fabric is obtained.

[0054] Example 3

[0055] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 35 kg of random copolymer polypropylene, 1.7 kg of maleic anhydride grafted polypropylene, 12 kg of polyisobutylene masterbatch PW60, 2.5 kg of sodium carbonate, 1.5 kg of sodium silicate, 1.7 kg of calcium nitrate, 1.2 kg of activated carbon nanotubes, 11 kg of toughened carbon fiber, 4.1 kg of color masterbatch, 4.8 kg of dodecyl mercaptan di-n-butyltin, and 4.5 kg of N,N'-ethylene ricinoleic acid amide.

[0056] Activated carbon nanotubes are prepared by the following steps: 8 kg of carbon nanotubes and 1.3 kg of sodium dodecyl sulfate are added to 35 kg of water, stirred at 1300 r / min for 100 min, ultrasonically dispersed for 15 min at an ultrasonic frequency of 10 kHz, and spray dried to obtain activated carbon nanotubes.

[0057] Toughened carbon fiber is prepared by the following steps: 25 kg of carbon fiber is added to 140 kg of dimethyl sulfoxide, and 2 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 100 min, 1.5 kg of saturated ammonia water is added and stirring is continued for 25 min. The mixture is soaked in ethanol for 13 h, filtered, washed with ethanol 4 times, and vacuum dried to obtain pretreated carbon fiber. 1.3 kg of fly ash, 0.7 kg of desulfurized gypsum, and 0.3 kg of silica fume are mixed evenly, 3.5 kg of water and 0.4 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 58℃ for 15 min, added to a calcining furnace, heated at 157℃ for 80 min, heated to 950℃ and calcined for 12 min, and cooled to room temperature to obtain toughened carbon fiber.

[0058] The preparation method of the above-mentioned toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0059] S1. Mix 45kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.3kg color masterbatch, 1.8kg dodecyl mercaptan di-n-butyltin, and 1.3kg N,N'-ethylhexane alkydamide evenly. Add 6kg toughened carbon fiber and stir evenly. Feed the mixture into an extruder for melt extrusion. The extruder barrel temperature is 175℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 130℃. Set it in a heat-setting roller at 87℃ for 3 minutes. After cooling, weave the mixture into a pre-woven layer using a circular loom.

[0060] S2. Mix 35kg homopolymer polypropylene, 5kg toughened carbon fiber, activated carbon nanotubes, 1.2kg color masterbatch, 1.7kg dodecanethiol di-n-butyltin, and 1.4kg N,N'-ethylene castor oil alkydamide evenly to obtain a toughening layer premix.

[0061] S3. Mix random copolymer polypropylene, 1.6 kg masterbatch, 1.3 kg dodecyl mercaptan di-n-butyltin, and 1.8 kg N,N'-ethylene ricinoleic acid amide evenly to obtain a nonwoven fabric layer premix.

[0062] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, a toughened and aging-resistant composite plastic woven fabric is obtained.

[0063] Example 4

[0064] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 45 kg of random copolymer polypropylene, 1.3 kg of maleic anhydride grafted polypropylene, 18 kg of polyisobutylene masterbatch PW60, 1.5 kg of sodium carbonate, 2.5 kg of sodium silicate, 1.3 kg of calcium nitrate, 1.8 kg of activated carbon nanotubes, 7 kg of toughened carbon fiber, 4.9 kg of color masterbatch, 4.2 kg of dodecyl mercaptan di-n-butyltin, and 4.5 kg of ricinoleic acid amide.

[0065] Activated carbon nanotubes were prepared by the following steps: 6 kg of carbon nanotubes and 1.7 kg of surface polyvinyl alcohol were added to 25 kg of water, stirred at 1700 r / min for 80 min, ultrasonically dispersed for 25 min at an ultrasonic frequency of 6 kHz, and spray dried to obtain activated carbon nanotubes.

[0066] Toughened carbon fiber is prepared by the following steps: 35 kg of carbon fiber is added to 120 kg of dimethyl sulfoxide, and 4 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 80 min, 2.5 kg of saturated ammonia water is added and stirring is continued for 15 min. The mixture is soaked in ethanol for 17 h, filtered, washed twice with ethanol, and vacuum dried to obtain pretreated carbon fiber. 1.7 kg of fly ash, 0.3 kg of desulfurized gypsum, and 0.6 kg of silica fume are mixed evenly, 2.5 kg of water and 0.8 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 52℃ for 25 min, added to a calcining furnace, heated at 153℃ for 100 min, heated to 850℃ and calcined for 18 min, and cooled to room temperature to obtain toughened carbon fiber.

[0067] The preparation method of the above-mentioned toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0068] S1. Mix 35kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.7kg color masterbatch, 1.2kg dodecyl mercaptan di-n-butyltin, and 1.7kg ricinoleic acid amide evenly. Add 4kg toughened carbon fiber and stir evenly. Feed the mixture into an extruder for melt extrusion. The extruder barrel temperature is 185℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 125℃. Set it in a heat-setting roller at 90℃ for 2 minutes. After cooling, weave the mixture into a pre-woven layer using a circular loom.

[0069] S2. Mix 45kg homopolymer polypropylene, 3kg toughened carbon fiber, activated carbon nanotubes, 1.8kg color masterbatch, 1.3kg dodecanethiol di-n-butyltin, and 1.6kg castor oil amide evenly to obtain a toughening layer premix.

[0070] S3. Mix random copolymer polypropylene, 1.4 kg masterbatch, 1.7 kg dodecyl mercaptan di-n-butyltin, and 1.2 kg ricinoleic acid amide evenly to obtain a nonwoven fabric layer premix.

[0071] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, a toughened and aging-resistant composite plastic woven fabric is obtained.

[0072] Example 5

[0073] A toughened and aging-resistant composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 40 kg of random copolymer polypropylene, 1.5 kg of maleic anhydride grafted polypropylene, 15 kg of polyisobutylene masterbatch PW60, 2 kg of sodium carbonate, 2 kg of sodium silicate, 1.5 kg of calcium nitrate, 1.5 kg of activated carbon nanotubes, 9 kg of toughened carbon fiber, 4.5 kg of color masterbatch, 4.5 kg of di-n-octyltin β-mercaptopropionate, and 4.5 kg of erucamide.

[0074] Activated carbon nanotubes are prepared by the following steps: 7 kg of carbon nanotubes and 1.5 kg of sodium dodecylbenzenesulfonate are added to 30 kg of water, stirred at 1500 r / min for 90 min, ultrasonically dispersed for 20 min at an ultrasonic frequency of 8 kHz, and spray dried to obtain activated carbon nanotubes.

[0075] Toughened carbon fiber is prepared by the following steps: 30 kg of carbon fiber is added to 130 kg of dimethyl sulfoxide, and 3 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 90 min, 2 kg of saturated ammonia water is added and stirring is continued for 20 min. The mixture is soaked in ethanol for 15 h, filtered, washed with ethanol 3 times, and vacuum dried to obtain pretreated carbon fiber. 1.5 kg of fly ash, 0.5 kg of desulfurized gypsum, and 0.45 kg of silica fume are mixed evenly, 3 kg of water and 0.6 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 55℃ for 20 min, added to a calcining furnace, heated at 155℃ for 90 min, heated to 900℃ and calcined for 15 min, and cooled to room temperature to obtain toughened carbon fiber.

[0076] The preparation method of the above-mentioned toughened and aging-resistant composite plastic woven fabric includes the following steps:

[0077] S1. Mix 40kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate, and 1.5kg erucamide evenly. Add 5kg toughened carbon fiber and stir evenly. Send the mixture to an extruder for melt extrusion. The extruder barrel temperature is 180℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 128℃. Set it in a heat-setting roller at 88℃ for 2.5 minutes. After cooling, weave the mixture on a circular loom to obtain a pre-woven layer.

[0078] S2. Mix 40kg homopolymer polypropylene, 4kg toughened carbon fiber, activated carbon nanotubes, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate and 1.5kg erucamide evenly to obtain toughening layer premix.

[0079] S3. Mix random copolymer polypropylene, 1.5 kg masterbatch, 1.5 kg di-n-octyltin β-mercaptopropionic acid, and 1.5 kg erucamide evenly to obtain a nonwoven fabric layer premix.

[0080] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, a toughened and aging-resistant composite plastic woven fabric is obtained.

[0081] Comparative Example 1

[0082] A composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 40 kg of random copolymer polypropylene, 1.5 kg of maleic anhydride grafted polypropylene, 15 kg of polyisobutylene masterbatch PW60, 2 kg of sodium carbonate, 2 kg of sodium silicate, 1.5 kg of calcium nitrate, 9 kg of toughened carbon fiber, 4.5 kg of color masterbatch, 4.5 kg of di-n-octyltin β-mercaptopropionate, and 4.5 kg of erucamide.

[0083] Toughened carbon fiber is prepared by the following steps: 30 kg of carbon fiber is added to 130 kg of dimethyl sulfoxide, and 3 kg of methyltrimethoxysilane is added while stirring. Stirring is continued for 90 min, 2 kg of saturated ammonia water is added and stirring is continued for 20 min. The mixture is soaked in ethanol for 15 h, filtered, washed with ethanol 3 times, and vacuum dried to obtain pretreated carbon fiber. 1.5 kg of fly ash, 0.5 kg of desulfurized gypsum, and 0.45 kg of silica fume are mixed evenly, 3 kg of water and 0.6 kg of polyvinyl alcohol are added and stirred evenly, the pretreated carbon fiber is added and stirred evenly, heated at 55℃ for 20 min, added to a calcining furnace, heated at 155℃ for 90 min, heated to 900℃ and calcined for 15 min, and cooled to room temperature to obtain toughened carbon fiber.

[0084] The preparation method of the above-mentioned composite plastic woven fabric includes the following steps:

[0085] S1. Mix 40kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate, and 1.5kg erucamide evenly. Add 5kg toughened carbon fiber and stir evenly. Send the mixture to an extruder for melt extrusion. The extruder barrel temperature is 180℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 128℃. Set it in a heat-setting roller at 88℃ for 2.5 minutes. After cooling, weave the mixture on a circular loom to obtain a pre-woven layer.

[0086] S2. Mix 40kg homopolymer polypropylene, 4kg toughened carbon fiber, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate and 1.5kg erucamide evenly to obtain toughening layer premix;

[0087] S3. Mix random copolymer polypropylene, 1.5 kg masterbatch, 1.5 kg di-n-octyltin β-mercaptopropionic acid, and 1.5 kg erucamide evenly to obtain a nonwoven fabric layer premix.

[0088] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, the composite plastic woven fabric is obtained.

[0089] Comparative Example 2

[0090] A composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 40 kg of random copolymer polypropylene, 1.5 kg of maleic anhydride grafted polypropylene, 15 kg of polyisobutylene masterbatch PW60, 2 kg of sodium carbonate, 2 kg of sodium silicate, 1.5 kg of calcium nitrate, 1.5 kg of activated carbon nanotubes, 9 kg of toughened carbon fiber, 4.5 kg of color masterbatch, 4.5 kg of di-n-octyltin β-mercaptopropionate, and 4.5 kg of erucamide.

[0091] Activated carbon nanotubes are prepared by the following steps: 7 kg of carbon nanotubes and 1.5 kg of sodium dodecylbenzenesulfonate are added to 30 kg of water, stirred at 1500 r / min for 90 min, ultrasonically dispersed for 20 min at an ultrasonic frequency of 8 kHz, and spray dried to obtain activated carbon nanotubes.

[0092] Toughened carbon fiber is prepared by the following steps: 30 kg of carbon fiber is added to 130 kg of dimethyl sulfoxide, 3 kg of methyltrimethoxysilane is added while stirring, and stirring is continued for 90 min. 2 kg of saturated ammonia water is added and stirring is continued for 20 min. The mixture is soaked in ethanol for 15 h, filtered, washed with ethanol 3 times, and vacuum dried to obtain toughened carbon fiber.

[0093] The preparation method of the above-mentioned composite plastic woven fabric includes the following steps:

[0094] S1. Mix 40kg homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate, and 1.5kg erucamide evenly. Add 5kg toughened carbon fiber and stir evenly. Send the mixture to an extruder for melt extrusion. The extruder barrel temperature is 180℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 128℃. Set it in a heat-setting roller at 88℃ for 2.5 minutes. After cooling, weave the mixture on a circular loom to obtain a pre-woven layer.

[0095] S2. Mix 40kg homopolymer polypropylene, 4kg toughened carbon fiber, activated carbon nanotubes, 1.5kg color masterbatch, 1.5kg di-n-octyltin β-mercaptopropionate and 1.5kg erucamide evenly to obtain toughening layer premix.

[0096] S3. Mix random copolymer polypropylene, 1.5 kg masterbatch, 1.5 kg di-n-octyltin β-mercaptopropionic acid, and 1.5 kg erucamide evenly to obtain a nonwoven fabric layer premix.

[0097] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, the composite plastic woven fabric is obtained.

[0098] Comparative Example 3

[0099] A composite plastic woven fabric, the raw materials of which include: 80 kg of homopolymer polypropylene, 40 kg of random copolymer polypropylene, 1.5 kg of maleic anhydride grafted polypropylene, 15 kg of polyisobutylene masterbatch PW60, 2 kg of sodium carbonate, 2 kg of sodium silicate, 1.5 kg of calcium nitrate, 1.5 kg of activated carbon nanotubes, 4.5 kg of color masterbatch, 4.5 kg of di-n-octyltin β-mercaptopropionate, and 4.5 kg of erucamide.

[0100] Activated carbon nanotubes are prepared by the following steps: 7 kg of carbon nanotubes and 1.5 kg of sodium dodecylbenzenesulfonate are added to 30 kg of water, stirred at 1500 r / min for 90 min, ultrasonically dispersed for 20 min at an ultrasonic frequency of 8 kHz, and spray dried to obtain activated carbon nanotubes.

[0101] The preparation method of the above-mentioned composite plastic woven fabric includes the following steps:

[0102] S1. Mix 40kg of homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, 1.5kg of color masterbatch, 1.5kg of di-n-octyltin β-mercaptopropionate, and 1.5kg of erucamide evenly, and feed them into an extruder for melt extrusion. The extruder barrel temperature is 180℃. After cooling, cut the mixture and stretch it longitudinally in an oven at 128℃. Then, heat set it in a heat-setting roller at 88℃ for 2.5 minutes, cool it, and weave it on a circular loom to obtain a pre-woven layer.

[0103] S2. Mix 40 kg of homopolymer polypropylene, activated carbon nanotubes, 1.5 kg of color masterbatch, 1.5 kg of di-n-octyltin β-mercaptopropionate, and 1.5 kg of erucamide evenly to obtain a toughening layer premix.

[0104] S3. Mix random copolymer polypropylene, 1.5 kg masterbatch, 1.5 kg di-n-octyltin β-mercaptopropionic acid, and 1.5 kg erucamide evenly to obtain a nonwoven fabric layer premix.

[0105] S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer. After cooling, the composite plastic woven fabric is obtained.

[0106] The tensile strength of the composite plastic woven fabrics obtained in Example 5 and Comparative Examples 1-3 was measured according to GB / T1040.3-2006 "Determination of tensile properties of plastics - Part 3: Test conditions for films and sheets". Subsequently, the samples were aged using a UV-A340 lamp according to GB / T16422.3-2022 "Laboratory light source exposure test method for plastics - Part 3: Fluorescent ultraviolet lamp", and the tensile strength of the samples was tested again according to the above tensile strength test method. The tensile strength retention rate after aging was calculated according to the following formula:

[0107] Tensile strength retention rate after aging = Tensile strength after aging / Tensile strength before aging × 100%

[0108] like Figure 1As shown, compared with the comparative example, the tensile strength and aging resistance of the composite plastic woven fabric obtained in Example 5 are significantly improved, which confirms that the woven fabric uses activated carbon nanotubes and toughened carbon fibers to effectively improve the bonding between the fibers and the matrix, and to make the fibers and the matrix exhibit obvious slip hardening effect, thereby improving the tensile strain capacity of the material. At the same time, the activated carbon nanotubes and toughened carbon fibers bridge each other, filling and inhibiting the expansion of pores and cracks inside the matrix at multiple scales, enhancing the strength and ductility of the material, and showing excellent toughening effect.

[0109] The thermo-oxidative aging tests were continued on the composite plastic woven fabrics obtained in Example 5 and Comparative Examples 1-3. Each group of samples was placed in an electric heating drying oven and subjected to thermo-oxidative aging at 200°C. The samples were taken out and weighed on days 0, 2, 4, 6, 8, and 10, and the weight loss rate M of the samples under different aging times in the thermo-oxidative aging environment was calculated.

[0110] M=(m0-m t ) / m0×100%

[0111] M is the weight loss rate of the sample (%); m0 is the mass of the sample before aging (g); m t The mass (g) of the sample after aging for t hours.

[0112] like Figure 2 As shown, the composite plastic woven fabric obtained in Example 5 consistently exhibits the lowest weight loss rate, confirming the excellent heat aging resistance of the composite plastic woven fabric obtained in this application, thus minimizing the impact of thermo-oxidative aging on its weight loss rate. Furthermore, through… Figure 1 and Figure 2 The comparison of aging performance revealed that the composite plastic woven fabric obtained in Example 5 had the best resistance to both UV aging and heat aging.

[0113] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A toughened and aging-resistant composite plastic woven fabric, characterized in that, The raw materials, by weight, include: 60-100 parts homopolymer polypropylene, 30-50 parts random copolymer polypropylene, 1-2 parts maleic anhydride grafted polypropylene, 10-20 parts polyisobutylene masterbatch PW60, 1-3 parts sodium carbonate, 1-3 parts sodium silicate, 1-2 parts calcium nitrate, 1-2 parts activated carbon nanotubes, 4-14 parts toughened carbon fiber, 3-6 parts color masterbatch, 3-6 parts heat stabilizer, and 3-6 parts lubricant. Activated carbon nanotubes are obtained by treating carbon nanotubes in a surfactant solution; toughened carbon fibers are obtained by depositing silica on the surface of carbon fibers, adding fly ash, desulfurized gypsum, silica fume and polyvinyl alcohol, and then calcining. The following steps are used to prepare it: S1. Homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, color masterbatch, heat stabilizer, and lubricant are mixed evenly. Toughened carbon fiber is added and stirred evenly. The mixture is melt-extruded, cut, longitudinally stretched, heat-set, cooled, and woven to obtain a prefabricated woven layer. S2. Homopolymer polypropylene, toughened carbon fiber, activated carbon nanotubes, color masterbatch, heat stabilizer and lubricant are mixed evenly to obtain toughened layer premix. S3. Mix random copolymer polypropylene, color masterbatch, heat stabilizer and lubricant evenly to obtain nonwoven fabric layer premix; S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer to obtain a toughened and aging-resistant composite plastic woven fabric. The mass ratio of toughening carbon fiber used in the prefabricated braided layer to toughening carbon fiber used in the toughening layer premix is ​​1-4:1-3; the mass ratio of homopolymer polypropylene used in the prefabricated braided layer to homopolymer polypropylene used in the toughening layer premix is ​​3-5:3-5.

2. The toughened and aging-resistant composite plastic woven fabric according to claim 1, characterized in that, The heat stabilizer is at least one of dioctyltin dimercaptoacetate, di-n-octyltin dodecyl mercaptoacetate, and di-n-octyltin β-mercaptopropionic acid.

3. The toughened and aging-resistant composite plastic woven fabric according to claim 1, characterized in that, The lubricant is at least one of stearamide, erucamide, ricinoleamide, N,N'-ethylene bis-stearamide, and N,N'-ethylene ricinoleic acid amide.

4. The toughened and aging-resistant composite plastic woven fabric according to claim 1, characterized in that, Activated carbon nanotubes are prepared by the following steps: adding carbon nanotubes and surfactants to water and stirring for 1-2 hours, ultrasonically dispersing for 10-30 minutes at an ultrasonic frequency of 5-12 kHz, and spray drying to obtain activated carbon nanotubes.

5. The toughened and aging-resistant composite plastic woven fabric according to claim 1 or 4, characterized in that, The surfactant is at least one of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, polyvinyl alcohol, and polystyrene.

6. The toughened and aging-resistant composite plastic woven fabric according to claim 1 or 4, characterized in that, The mass ratio of carbon nanotubes to surfactants is 5-10:1-2.

7. The toughened and aging-resistant composite plastic woven fabric according to claim 1, characterized in that, Toughened carbon fiber is prepared by the following steps: carbon fiber is added to dimethyl sulfoxide, methyltrimethoxysilane is added under stirring, saturated ammonia water is added and stirring is continued, washed, and vacuum dried to obtain pretreated carbon fiber; fly ash, desulfurized gypsum, and silica fume are mixed evenly, water and polyvinyl alcohol are added and stirred evenly, pretreated carbon fiber is added and stirred evenly, heated at 50-60℃ for 10-30 min, heated at 150-160℃ for 1-2 h, and calcined at 800-1000℃ for 10-20 min to obtain toughened carbon fiber.

8. The toughened and aging-resistant composite plastic woven fabric according to claim 7, characterized in that, The mass ratio of carbon fiber, methyltrimethoxysilane, and saturated ammonia is 20-40:1-5:1-3; the mass ratio of fly ash, desulfurized gypsum, silica fume, and polyvinyl alcohol is 1-2:0.1-1:0.1-1:0.1-1.

9. A method for preparing a toughened, aging-resistant composite plastic woven fabric as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Homopolymer polypropylene, maleic anhydride-grafted polypropylene, polyisobutylene masterbatch PW60, sodium carbonate, sodium silicate, calcium nitrate, color masterbatch, heat stabilizer, and lubricant are mixed evenly. Toughened carbon fiber is added and stirred evenly. The mixture is melt-extruded, cut, longitudinally stretched, heat-set, cooled, and woven to obtain a prefabricated woven layer. S2. Homopolymer polypropylene, toughened carbon fiber, activated carbon nanotubes, color masterbatch, heat stabilizer and lubricant are mixed evenly to obtain toughened layer premix. S3. Mix random copolymer polypropylene, color masterbatch, heat stabilizer and lubricant evenly to obtain nonwoven fabric layer premix; S4. The toughening layer premix is ​​cast onto the front side of the prewoven layer, and the nonwoven layer premix is ​​cast onto the back side of the prewoven layer to obtain a toughened and aging-resistant composite plastic woven fabric.

10. The method for preparing toughened and aging-resistant composite plastic woven fabric according to claim 9, characterized in that, The mass ratio of toughened carbon fiber used in the prefabricated braided layer to toughened carbon fiber used in the toughening layer premix is ​​1-4:1-3.

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