Anti-aging curtain cloth and preparation method thereof

Abstract

The invention relates to the field of spinning, and particularly discloses an anti-aging curtain cloth preparation method which comprises the following steps: S1, base cloth pretreatment: firstly, cleaning base cloth to obtain pretreated base cloth; s2, carrying out dipping treatment on the pretreated base cloth in a modified dipping solution containing an amino silane coupling agent, a nano titanium dioxide dispersion liquid, genipin and PAMAM, and then drying to obtain modified base cloth; s3, anti-ultraviolet coating liquid is prepared, then an anti-ultraviolet coating is formed on the modified base cloth, and the anti-ultraviolet coating liquid at least comprises acrylic resin, an ultraviolet light absorber, a free radical trapping agent, an aziridine cross-linking agent and a solvent; the invention further discloses the anti-aging curtain cloth prepared by adopting the preparation method. The anti-aging curtain cloth has the advantages that the anti-aging performance of the curtain cloth is improved, the anti-aging durability is further improved on the basis of the technology, and the curtain cloth still has the excellent anti-aging performance after being used for a long time.

Description

Technical Field

[0001] This application relates to the textile field, and more specifically, to an anti-aging curtain fabric and a method for preparing the same. Background Technology

[0002] Curtains, an indispensable part of homes and commercial spaces, not only regulate light and protect privacy but also play a vital role in interior decoration. However, traditional curtains, when exposed to sunlight and ultraviolet radiation for extended periods, are prone to photo-oxidative degradation. This process leads to discoloration, brittleness, and reduced strength in the curtain fabric, significantly shortening its lifespan and increasing replacement frequency and costs. In particular, UVA and UVB rays with wavelengths between 290-400nm are the main factors initiating photo-oxidative degradation, capable of penetrating ordinary curtain fabric materials and causing irreversible damage to the internal fibers.

[0003] Currently, to improve the anti-aging properties of curtains, one method is to increase the thickness of the curtain fabric or use dark-colored materials to reduce ultraviolet rays. While this can reduce UV penetration to some extent, it severely affects the light transmittance and aesthetics of the curtains, and the anti-aging effect is limited. Therefore, the anti-aging function of existing curtain fabrics is mainly achieved through anti-UV coatings. However, due to the varying bonding strength between the coating and the base fabric, the anti-UV coating may peel off after prolonged use, reducing its anti-aging performance.

[0004] To address the aforementioned shortcomings, it is necessary to further enhance the bonding strength between the current curtain fabric base and the UV-resistant coating. This will improve the anti-aging performance of the curtain fabric and further enhance its durability, ensuring that the curtain fabric retains excellent anti-aging properties even after prolonged use. Summary of the Invention

[0005] In order to improve the anti-aging performance of curtain fabric and further enhance its anti-aging durability, so that the curtain fabric still has excellent anti-aging performance after long-term use, this application provides an anti-aging curtain fabric and its preparation method.

[0006] In a first aspect, this application provides a method for preparing anti-aging curtain fabric, which adopts the following technical solution: A method for preparing an anti-aging curtain fabric includes the following steps: S1. Base fabric pretreatment: First, the base fabric is cleaned to obtain a pretreated base fabric; S2. The pretreated base fabric is impregnated in a modified impregnation solution containing aminosilane coupling agent, nano titanium dioxide dispersion, genipin and PAMAM, and then dried to obtain the modified base fabric. S3. Prepare an anti-UV coating liquid and then form an anti-UV coating on the modified base fabric. The anti-UV coating liquid includes at least acrylic resin, UV absorber, free radical scavenger, aziridine crosslinking agent, and solvent.

[0007] By adopting the above technical solution, the base fabric in this application is first cleaned to remove impurities from the surface of the base fabric, and then it is impregnated in a modified impregnation solution. The addition of nano titanium dioxide dispersion in the modified impregnation solution helps it to be embedded in the base fabric fibers. On the one hand, nano titanium dioxide has good ultraviolet absorption performance, which can synergistically enhance the anti-aging performance with the absorbent in the anti-ultraviolet coating. Moreover, it is embedded in the pore structure of the base fabric and forms a double protection with the anti-ultraviolet coating, which significantly improves its anti-aging durability.

[0008] The modified impregnation solution also contains an aminosilane coupling agent. One end of the aminosilane coupling agent forms a chemical bond with the hydroxyl groups in the base fabric fibers, while the other end of the amino group forms a chemical bond with the carboxyl groups of the acrylic resin. This helps to covalently bond the base fabric with the UV-resistant coating, improving the bonding strength between the UV-resistant coating and the base fabric layer. This alleviates the UV-resistant failure caused by insufficient bonding strength leading to coating detachment, thus improving anti-aging durability. In addition, multiple amino groups on PAMAM can also form chemical bonds with the acrylic resin and the hydroxyl groups in the base fabric. Combined with genipin, this enables cross-linking between PAMAM and the amino groups on the aminosilane coupling agent. This modifies the pretreated base fabric and allows it to form chemical bonds with the subsequent UV-resistant coating solution, improving the bonding strength between the UV-resistant coating and the base fabric layer, thereby enhancing anti-aging durability.

[0009] In this application, the acrylic resin in the anti-UV coating liquid acts as a binder to form a tough protective film. The UV absorber and free radical scavenger can effectively absorb and quench UV rays, preventing photo-oxidative degradation. The aziridine crosslinking agent forms chemical crosslinks during coating curing, improving the coating's durability and anti-aging performance. Finally, this application enhances the chemical bond between the base fabric and the anti-UV coating through pretreatment and modification of the base fabric layer, thereby improving both anti-aging performance and its anti-aging durability.

[0010] Optionally, in step S2, the modified impregnation solution comprises the following parts by weight of raw materials: 5-10 parts γ-aminopropyltriethoxysilane, 10-20 parts nano titanium dioxide, 2-5 parts hydroxyethyl cellulose, 1-3 parts genipin, 3-5 parts PAMAM, 20-30 parts ethanol and 35-50 parts water.

[0011] By adopting the above technical solution, hydroxyethyl cellulose, as a dispersant and anti-settling agent, helps the nano-titanium dioxide to be suspended and dispersed in the modified impregnation solution, thereby contributing to the uniform loading on the pretreated base fabric.

[0012] Optionally, 3-5 parts by weight of glycine may be added to the modified impregnation solution in step S2.

[0013] By employing the above-mentioned technical solution, when glycine is added to the modified impregnation solution, it possesses both amino and carboxyl functional groups. Its carboxyl functional group can react with the hydroxyl groups on the fiber surface to form chemical bonds, and its amino group can form amide bonds with the carboxyl groups in the fiber base fabric. This allows glycine to firmly adhere to the base fabric surface. Simultaneously, the amino group in glycine can react with the carboxyl groups in the acrylic resin, thus enhancing the interaction between glycine and the UV-resistant coating. Ultimately, glycine forms a "molecular bridging" effect between the base fabric and the UV-resistant coating, with its amino and carboxyl groups forming chemical bonds with the base fabric fiber and the coating resin respectively. This significantly enhances the intermolecular forces at the interface, improving the bonding strength between the base fabric and the UV-resistant coating, thereby improving the anti-aging durability. Furthermore, glycine is selected as a neutral amino acid in this application, allowing it to form a stable interaction with the base fabric and the UV-resistant coating while avoiding a decrease in bonding strength due to charge repulsion.

[0014] Optionally, the modified impregnation solution is prepared by the following method: Ethanol and half the amount of water were mixed, hydroxyethyl cellulose was added, and then nano-titanium dioxide was added and ultrasonically dispersed to obtain a nano-titanium dioxide dispersion. The remaining water, PAMAM, γ-aminopropyltriethoxysilane, and the remaining raw materials were mixed and dispersed. Then, nano-titanium dioxide dispersion was added, and the pH value was adjusted to 4-5. After stirring, the modified impregnation solution was obtained.

[0015] Optionally, in step S2, the impregnation temperature is 45-60℃, the impregnation time is 1-2h, and the impregnation pressure is 0.3-0.5MPa.

[0016] By adopting the above technical solution, when pressure impregnation is used, it is more conducive to the effective components in the modified impregnation solution embedding into the fiber pores of the base fabric layer or forming chemical bonds with the fibers, which helps to form a better effect with the UV-resistant layer in the future.

[0017] Optionally, the UV-resistant coating liquid in step S3 includes the following raw materials in parts by weight: 5-10 parts of ultraviolet absorber, 3-5 parts of free radical scavenger, 12-18 parts of acrylic resin, 0.5-3 parts of aziridine crosslinking agent, 20-30 parts of water, and 40-50 parts of ethanol.

[0018] By employing the above technical solutions, ultraviolet absorbers can strongly and selectively absorb high-energy ultraviolet rays and release this energy as heat or harmless low-energy radiation. When ultraviolet rays irradiate the curtain fabric, the ultraviolet absorber absorbs the ultraviolet energy, preventing it from damaging the polymer molecules in the curtain fabric, thereby protecting the curtain fabric from aging and damage caused by ultraviolet rays. Free radical scavengers have a steric hindrance effect and can consume free radicals. Under ultraviolet irradiation, the polymer molecules in the curtain fabric undergo photo-oxidation, generating free radicals. Free radical scavengers can capture these free radicals, blocking further oxidative damage to the polymer network and delaying material aging.

[0019] Acrylic resin, as a film-forming resin, is the basic component of UV-resistant coatings. It can evaporate in the air to form a uniform coating with good weather resistance and a wide range of applications. Aziridine crosslinking agents can react with carboxyl-containing systems at room temperature. In UV-resistant coating solutions, aziridine crosslinking agents react with acrylic resin and other components to form a more stable coating structure, enhancing the coating's performance and ensuring that the curtain fabric retains excellent anti-aging properties even after prolonged use.

[0020] Optionally, the ultraviolet absorber may be one or more of benzotriazole and triazine ultraviolet absorbers, and the free radical scavenger may be a hindered amine light stabilizer.

[0021] Optionally, the specific operation in step S3 is as follows: prepare an anti-UV coating liquid, then dip and roll the modified base fabric in the anti-UV coating liquid through a two-dip and two-roll process, with a roll-off rate of 65-70%, and then perform a heat curing treatment. The heat curing treatment specifically involves first pre-baking at 80-90℃ for 5-10 minutes, and then heating to 150-160℃ for drying for 3-10 minutes to form an anti-UV coating.

[0022] By employing the above technical solution, the modified base fabric is first immersed in an anti-UV coating liquid, allowing the coating liquid to fully penetrate into the fiber gaps of the base fabric. Then, it is rolled, with the pressure of the rollers squeezing out excess coating liquid while simultaneously ensuring uniform distribution of the coating liquid on the surface of the base fabric and within the fibers, forming a uniform coating precursor. Next, pre-baking is performed, allowing the solvent in the anti-UV coating liquid to evaporate rapidly, and the acrylic resin to undergo initial physical cross-linking and aggregation, forming a preliminary coating structure. Finally, high-temperature drying is carried out, where the aziridine cross-linking agent reacts with the carboxyl-containing components of the acrylic resin to form a three-dimensional network structure, resulting in a dense and uniform anti-UV coating. This effectively blocks the penetration of ultraviolet rays, reducing UV exposure to the base fabric and significantly improving the UV resistance of the curtain fabric. Simultaneously, the stable structure formed by the cross-linking reaction also enhances the coating's abrasion resistance, water resistance, and weather resistance, allowing the curtain fabric to maintain excellent anti-aging properties even after prolonged use. Moreover, while the aziridine crosslinking agent reacts with the carboxyl-containing components of the acrylic resin, it also crosslinks with the carboxyl-containing components such as nano-titanium dioxide and glycine in the base fabric layer, further enhancing the crosslinking structure between the UV-resistant coating and the base fabric layer, increasing the bonding strength, and thus improving the anti-aging durability.

[0023] Optionally, after obtaining the modified base fabric in step S2, a transition bonding coating is first applied to the surface of the modified base fabric and then cured to form a transition bonding layer. The transition bonding coating is obtained by the following method: After mixing polyurethane prepolymer with nano-montmorillonite, 2-hydroxyethyl acrylate is added. After heating to 80-90℃, dibutyltin dilaurate is added. After reacting for 2-3 hours, acrylate monomer and initiator are added. After reacting at 70-80℃ for 1-2 hours, water is added after cooling to room temperature to form a transitional bonding coating.

[0024] By adopting the above technical solution, polyurethane prepolymer is used as the matrix material and mixed with nano-montmorillonite to make the nano-montmorillonite uniformly dispersed in the polyurethane system. Then, 2-hydroxyethyl acrylate is added as a diluent after heating. Its monomer reacts with the isocyanate groups in the polyurethane prepolymer to form a cross-linked structure. Dibutyltin dilaurate is used as a catalyst to achieve end-capping of the polyurethane prepolymer. Then, acrylate monomer and initiator are added. Under the action of the initiator, the acrylate monomer polymerizes and forms a network interpenetrating structure with the polyurethane segments. At the same time, the acrylate monomer can also polymerize with HEA-terminated polyurethane prepolymer. Water is added to obtain an emulsion coating on the one hand, and on the other hand, the isocyanate in the polyurethane prepolymer reacts with water to form polyurethane under the action of water. Finally, the polyurethane-modified acrylate copolymer and nano-montmorillonite dispersed in the system are obtained in this application as a transitional bonding coating.

[0025] In transitional bonding coatings, the polyurethane segments contain polar groups such as urethane groups, which can form hydrogen bonds with polar groups on the base fabric surface and polar groups such as carboxyl groups in the UV-resistant coating. This enhances the bonding strength between the base fabric and the coating. More importantly, polyurethane has good flexibility and elasticity, which can act as a buffer between the base fabric and the UV-resistant coating. When the base fabric and the coating are subjected to external forces, polyurethane can absorb and disperse stress, reducing stress concentration and preventing the coating from detaching from the base fabric, thus improving the bonding strength between the base fabric and the coating. Meanwhile, the acrylate segments have good compatibility with the acrylic resin in the UV-resistant coating, and can tightly bond with the UV-resistant coating to form a continuous and uniform coating structure. In this way, by utilizing the flexibility and adhesion of polyurethane, and the weather resistance and compatibility of acrylate, it can act as a bridge between the base fabric and the UV-resistant coating, tightly connecting the two and improving the bonding strength.

[0026] When nano-montmorillonite sheet structures are dispersed in polyurethane-modified acrylate copolymers, the sheet structure of nano-montmorillonite can hinder the movement of polymer molecular chains, enhance the strength of the polymer, and thus improve the mechanical properties of the transition bonding coating. When subjected to external forces, nano-montmorillonite can disperse and transfer stress, prevent the coating from cracking and peeling, enhance the bonding strength between the base fabric and the coating, and utilize the certain interfacial bonding properties of the sheet structure to delay the transmission path of UV and oxygen, delay interfacial aging, maintain long-term bonding strength, and have longer-lasting anti-aging properties.

[0027] Optionally, in the preparation of the transition bonding coating, the mass ratio of polyurethane prepolymer to nano-montmorillonite is 1:(0.2-0.3), the amount of 2-hydroxyethyl acrylate added is 3-5 wt% of polyurethane prepolymer, the amount of dibutyltin dilaurate added is 0.5-1 wt% of polyurethane prepolymer, the mass ratio of polyurethane prepolymer to acrylate monomer is 1:(0.8-1.2), the amount of initiator added is 1-3 wt% of acrylate monomer, and the amount of water added is 40-50 wt% of polyurethane prepolymer.

[0028] Optionally, the acrylate monomer may be selected from one or more of ethyl acrylate, butyl acrylate, methyl methacrylate and hydroxyethyl acrylate.

[0029] Optionally, when applying a transitional bonding coating to the surface of the modified base fabric, the curing parameters are: pre-curing at 80-90℃ for 1-2 minutes, followed by curing at 120-130℃ for 3-5 minutes.

[0030] Optionally, the thickness of the transition adhesive layer coated on the surface of the modified base fabric is 0.05-0.1 mm.

[0031] Secondly, this application provides an anti-aging curtain fabric, which adopts the following technical solution: An anti-aging curtain fabric is prepared by the aforementioned method.

[0032] By adopting the above technical solution, the anti-aging curtain fabric prepared by the method provided in this application has excellent anti-aging properties and better anti-aging durability, and still has excellent anti-aging properties after a long time.

[0033] In summary, this application has the following beneficial effects: 1. In this application, the base fabric is impregnated in a modified impregnation solution. The addition of nano-titanium dioxide dispersion in the modified impregnation solution helps it to be embedded in the base fabric fibers. On the one hand, nano-titanium dioxide has good ultraviolet absorption performance, which can synergistically enhance the anti-aging performance with the absorbent in the anti-ultraviolet coating. Moreover, it is embedded in the pore structure of the base fabric and forms a double protection with the anti-ultraviolet coating, which significantly improves its anti-aging durability. 2. The modified impregnation solution of this application also contains an aminosilane coupling agent. One end of the aminosilane coupling agent forms a chemical bond with the hydroxyl groups in the base fabric fiber, and the amino group at the other end forms a chemical bond with the carboxyl group of the acrylic resin. This helps to covalently bond the base fabric and the anti-UV coating, which helps to improve the bonding strength between the anti-UV coating and the base fabric layer. This alleviates the anti-UV failure caused by the peeling of the anti-UV coating due to insufficient bonding strength, thereby improving the anti-aging durability. In addition, multiple amino groups on PAMAM can also form chemical bonds with the acrylic resin and the hydroxyl groups in the base fabric. Combined with genipin, it can achieve cross-linking between PAMAM and the amino groups on the aminosilane coupling agent. This achieves the modification of the pretreated base fabric and allows it to form chemical bonds with the subsequent anti-UV coating solution, improving the bonding strength between the anti-UV coating and the base fabric layer, thereby improving the anti-aging durability. Detailed Implementation

[0034] The following detailed description of this application is provided in conjunction with the embodiments. It should be noted that: unless otherwise specified, the conditions in the following embodiments are performed under conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following embodiments are all from commercially available sources.

[0035] In the following examples, the acrylic resin used is JE-6132 acrylic resin from Changzhou Jien New Material Co., Ltd.; the aziridine crosslinking agent is specifically aziridine crosslinking agent XR-100; The ultraviolet absorber is selected from either benzotriazole (specifically UV-326) or triazine ultraviolet absorber (specifically UV-1577); The free radical scavenger is a hindered amine light stabilizer (specifically UV-770); The polyurethane prepolymer selected is the polyurethane prepolymer from Zibo Xiangcheng Polyurethane Co., Ltd.

[0036] Example 1 A method for preparing an anti-aging curtain fabric includes the following steps: S1. Base fabric pretreatment: First, the cotton blended fabric (the mass ratio of cotton fiber to polyester fiber is 65:35) is used as the base fabric and cleaned to obtain the pretreated base fabric. S2, specifically includes the following steps: S2-1, Preparation of modified impregnation solution: 25 kg of ethanol and 20 kg of water were mixed and then 3 kg of hydroxyethyl cellulose was added. Then 15 kg of nano titanium dioxide was added and ultrasonically dispersed to obtain a nano titanium dioxide dispersion. 20 kg of water, 4 kg of PAMAM, 8 kg of γ-aminopropyltriethoxysilane, and 2 kg of genipin were mixed and dispersed, and then the prepared nano-titanium dioxide dispersion was added. The pH value was then adjusted to 4.5, and the mixture was stirred to obtain the modified impregnation solution. S2-2, Impregnation modification treatment: The pretreated base fabric obtained in step S1 is impregnated in the modified impregnation solution obtained in step S2-1. The solid-liquid ratio of the pretreated base fabric to the modified impregnation solution is 1:15 (g / mL), the impregnation temperature is 50℃, the impregnation time is 1.5h, the impregnation pressure is 0.4MPa, and then dried to obtain the modified base fabric. S3, specifically includes the following steps: S3-1: To prepare an anti-UV coating liquid, mix 15kg of acrylic resin, 25kg of water and 45kg of ethanol, then add 8kg of UV absorber UV-326 and 4kg of free radical scavenger UV-770, and then add 1.5kg of aziridine crosslinking agent. Mix and stir to obtain the anti-UV coating liquid. S3-2. The modified base fabric obtained in step S2-2 is dipped and rolled in an anti-UV coating liquid through a two-dip and two-roll process with a roll-off rate of 68%. Then, it is subjected to heat curing treatment. Specifically, the heat curing treatment is to first pre-bake at 85°C for 8 minutes, and then heat up to 155°C to dry for 6 minutes to form an anti-UV coating.

[0037] Example 2 A method for preparing an anti-aging curtain fabric includes the following steps: S1. Base fabric pretreatment: First, the cotton blended fabric (the mass ratio of cotton fiber to polyester fiber is 65:35) is used as the base fabric and cleaned to obtain the pretreated base fabric. S2, specifically includes the following steps: S2-1, Preparation of modified impregnation solution: 20 kg of ethanol and 18 kg of water were mixed, 2 kg of hydroxyethyl cellulose was added, and then 10 kg of nano titanium dioxide was added. The mixture was ultrasonically dispersed to obtain a nano titanium dioxide dispersion. 17 kg of water, 3 kg of PAMAM, 5 kg of γ-aminopropyltriethoxysilane, and 1 kg of genipin were mixed and dispersed, and then the prepared nano-titanium dioxide dispersion was added. The pH value was then adjusted to 4, and the mixture was stirred to obtain the modified impregnation solution. S2-2, Impregnation modification treatment: The pretreated base fabric obtained in step S1 is impregnated in the modified impregnation solution obtained in step S2-1. The solid-liquid ratio of the pretreated base fabric to the modified impregnation solution is 1:10 (g / mL), the impregnation temperature is 45℃, the impregnation time is 2h, the impregnation pressure is 0.3MPa, and then dried to obtain the modified base fabric. S3, specifically includes the following steps: S3-1: To prepare an anti-UV coating liquid, mix 12kg of acrylic resin, 20kg of water and 40kg of ethanol, then add 5kg of UV absorber UV-326 and 3kg of free radical scavenger UV-770, and then add 0.5kg of aziridine crosslinking agent. Mix and stir to obtain the anti-UV coating liquid. S3-2. The modified base fabric obtained in step S2-2 is dipped and rolled in an anti-UV coating liquid through a two-dip and two-roll process with a roll-off rate of 65%. Then, it is subjected to heat curing treatment. Specifically, the heat curing treatment is to first pre-bake at 80°C for 10 minutes, and then heat up to 150°C to dry for 10 minutes to form an anti-UV coating.

[0038] Example 3 A method for preparing an anti-aging curtain fabric includes the following steps: S1. Base fabric pretreatment: First, the cotton blended fabric (the mass ratio of cotton fiber to polyester fiber is 65:35) is used as the base fabric and cleaned to obtain the pretreated base fabric. S2, specifically includes the following steps: S2-1, Preparation of modified impregnation solution: 30 kg of ethanol and 25 kg of water were mixed, 5 kg of hydroxyethyl cellulose was added, and then 20 kg of nano titanium dioxide was added. The mixture was ultrasonically dispersed to obtain a nano titanium dioxide dispersion. 25 kg of water, 5 kg of PAMAM, 10 kg of γ-aminopropyltriethoxysilane, and 3 kg of genipin were mixed and dispersed, and then the prepared nano-titanium dioxide dispersion was added. The pH value was then adjusted to 5, and the mixture was stirred to obtain the modified impregnation solution. S2-2, Impregnation modification treatment: The pretreated base fabric obtained in step S1 is impregnated in the modified impregnation solution obtained in step S2-1. The solid-liquid ratio of the pretreated base fabric to the modified impregnation solution is 1:20 (g / mL), the impregnation temperature is 60℃, the impregnation time is 1h, the impregnation pressure is 0.5MPa, and then dried to obtain the modified base fabric. S3, specifically includes the following steps: S3-1: To prepare an anti-UV coating liquid, mix 18kg of acrylic resin, 30kg of water and 50kg of ethanol, then add 10kg of UV absorber UV-326 and 5kg of free radical scavenger UV-770, and then add 3kg of aziridine crosslinking agent. Mix and stir to obtain the anti-UV coating liquid. S3-2. The modified base fabric obtained in step S2-2 is dipped and rolled in an anti-UV coating liquid through a two-dip and two-roll process with a roll-off rate of 70%. Then, it is subjected to heat curing treatment. Specifically, the heat curing treatment is to first pre-bake at 90°C for 5 minutes, and then heat up to 160°C to dry for 3 minutes to form an anti-UV coating.

[0039] Example 4 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that: when preparing the modified impregnation solution in step S2-1, 4 kg of glycine is added along with genipin.

[0040] Example 5 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that: when preparing the modified impregnation solution in step S2-1, 3 kg of glycine is added along with genipin.

[0041] Example 6 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that: when preparing the modified impregnation solution in step S2-1, 5 kg of glycine is added along with genipin.

[0042] Example 7 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that after obtaining the modified base fabric in step S2-2, step S2-3 is further performed to coat the surface of the modified base fabric with a transition bonding coating and then cure it to form a transition bonding layer. The specific operation is as follows: S2-3. After applying the transition adhesive coating to the surface of the modified base fabric, cure it. The curing parameters are: pre-curing at 85℃ for 2 minutes and then curing at 125℃ for 4 minutes to form a surface coating transition adhesive layer with a thickness of 0.08 mm.

[0043] The transition bonding coating is prepared by the following method: After mixing polyurethane prepolymer with nano-montmorillonite, 2-hydroxyethyl acrylate is added. After heating to 85°C, dibutyltin dilaurate is added. After reacting for 2.5 hours, acrylate monomer (specifically hydroxyethyl acrylate) and initiator (specifically benzoyl peroxide) are added. The mixture is reacted at 75°C for 1.5 hours. After cooling to room temperature, water is added to form a transitional bonding coating. The mass ratio of polyurethane prepolymer to nano-montmorillonite is 1:0.2, the amount of 2-hydroxyethyl acrylate added is 4 wt% of polyurethane prepolymer, the amount of dibutyltin dilaurate added is 0.8 wt% of polyurethane prepolymer, the mass ratio of polyurethane prepolymer to acrylate monomer is 1:1, the amount of initiator added is 2 wt% of acrylate monomer, and the amount of water added is 45 wt% of polyurethane prepolymer.

[0044] Example 8 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that after obtaining the modified base fabric in step S2-2, step S2-3 is further performed to coat the surface of the modified base fabric with a transition bonding coating and then cure it to form a transition bonding layer. The specific operation is as follows: S2-3. After applying the transition adhesive coating to the surface of the modified base fabric, cure it. The curing parameters are: pre-curing at 80℃ for 2 minutes and then curing at 120℃ for 5 minutes to form a surface coating transition adhesive layer with a thickness of 0.05 mm.

[0045] The transition bonding coating is prepared by the following method: After mixing polyurethane prepolymer with nano-montmorillonite, 2-hydroxyethyl acrylate is added. After heating to 80°C, dibutyltin dilaurate is added. After reacting for 3 hours, acrylate monomer (specifically ethyl acrylate) and initiator (specifically benzoyl peroxide) are added. The mixture is reacted at 70°C for 2 hours. After cooling to room temperature, water is added to form a transitional bonding coating. The mass ratio of polyurethane prepolymer to nano-montmorillonite is 1:0.2, the amount of 2-hydroxyethyl acrylate added is 3 wt% of polyurethane prepolymer, the amount of dibutyltin dilaurate added is 0.5 wt% of polyurethane prepolymer, the mass ratio of polyurethane prepolymer to acrylate monomer is 1:0.8, the amount of initiator added is 1 wt% of acrylate monomer, and the amount of water added is 40 wt% of polyurethane prepolymer.

[0046] Example 9 A method for preparing an anti-aging curtain is carried out according to the method in Example 1, except that after obtaining the modified base fabric in step S2-2, step S2-3 is further performed to coat the surface of the modified base fabric with a transition bonding coating and then cure it to form a transition bonding layer. The specific operation is as follows: S2-3. After applying the transition adhesive coating to the surface of the modified base fabric, cure it. The curing parameters are: pre-curing at 90℃ for 1 minute and then curing at 130℃ for 3 minutes to form a surface coating transition adhesive layer with a thickness of 0.1 mm.

[0047] The transition bonding coating is prepared by the following method: After mixing polyurethane prepolymer with nano-montmorillonite, 2-hydroxyethyl acrylate is added. After heating to 90°C, dibutyltin dilaurate is added. After reacting for 2 hours, acrylate monomer (specifically methyl methacrylate) and initiator (specifically benzoyl peroxide) are added. The mixture is reacted at 80°C for 1 hour. After cooling to room temperature, water is added to form a transitional bonding coating. The mass ratio of polyurethane prepolymer to nano-montmorillonite is 1:0.3, the amount of 2-hydroxyethyl acrylate added is 5 wt% of polyurethane prepolymer, the amount of dibutyltin dilaurate added is 1 wt% of polyurethane prepolymer, the mass ratio of polyurethane prepolymer to acrylate monomer is 1:1.2, the amount of initiator added is 3 wt% of acrylate monomer, and the amount of water added is 50 wt% of polyurethane prepolymer.

[0048] Comparative Example 1 A method for preparing an anti-aging curtain fabric is carried out according to the method in Example 1, except that step S2 is not performed, and step S3 is performed directly after step S1.

[0049] Comparative Example 2 A method for preparing an anti-aging curtain fabric is carried out according to the method in Example 1, except that genipin is not added to the modified impregnation solution in step S2-1.

[0050] Comparative Example 3 A method for preparing an anti-aging curtain fabric is carried out according to the method in Example 1, except that PAMAM is not added to the modified impregnation solution in step S2-1.

[0051] Comparative Example 4 A method for preparing an anti-aging curtain fabric is carried out according to the method in Example 1, except that nano-titanium dioxide dispersion is not added to the modified impregnation solution in step S2-1.

[0052] Comparative Example 5 A method for preparing an anti-aging curtain fabric is carried out according to the method in Example 1, except that the nano-titanium dioxide in the modified impregnation solution in step S2-1 is replaced with an equal amount of nano-silica.

[0053] Performance testing The anti-aging curtains prepared in the embodiments and comparative examples of this application were placed in an accelerated ultraviolet aging test chamber to simulate natural ultraviolet radiation conditions. The UV-A wavelength was set to 340nm and the irradiation intensity to 0.76W / m². 2 The curtain fabric samples were continuously irradiated at a temperature of 60℃ and a relative humidity of 50% for 500 hours. The color difference (ΔE) of the samples compared to the initial irradiation was measured using a spectrophotometer, and the tensile strength of the curtain fabric was measured using a universal testing machine to assess the changes in mechanical properties. The curtain fabric samples after 500 hours of irradiation were then washed, dried, and irradiated again under the same conditions for another 500 hours (washed and dried every 100 hours of irradiation, and then irradiated again, in a cyclical manner). The color difference (ΔE) of the curtain fabric samples compared to the initial irradiation was measured again using a spectrophotometer, and the tensile strength of the curtain fabric was measured using a universal testing machine to assess the changes in mechanical properties. The test results are shown in Table 1 below.

[0054] Table 1: Based on the test results in Table 1 above, the curtain fabric prepared in this application embodiment has excellent anti-aging properties. Combining the test results of Example 1 and Examples 4-6, it can be seen that when glycine is added to the modified impregnation solution, it helps to form a better bond between the base fabric and the anti-UV coating, thereby helping to improve the anti-aging durability. It can be seen that after 1000 hours of UV irradiation and washing, Examples 4-6 still have excellent tensile strength retention and small color difference, and have good anti-aging properties. Combining the test results of Examples 7-9, it can be seen that when a transition bonding layer is formed between the pretreated base fabric and the anti-UV coating, the bond between the base fabric and the anti-UV coating is further improved, thereby helping to improve its anti-aging durability and maintaining good anti-aging properties even after a long time.

[0055] Combining the test results of Example 1 and Comparative Example 1, when the base fabric was directly coated with an anti-UV coating without the modification treatment in step S2, its anti-aging performance was reduced. In particular, after washing and prolonged irradiation, its mechanical property retention rate was significantly reduced, and the color difference was large. The anti-aging performance was reduced after prolonged irradiation or washing. Combining the test results of Comparative Examples 2 and 3, when genipin or PAMAM was not added to the modified impregnation solution, its anti-aging performance was reduced. In particular, after prolonged irradiation and washing, its mechanical property decreased significantly, and its anti-aging durability was significantly reduced, which was related to the peeling off of the anti-UV coating. Combining the test results of Comparative Examples 4 and 5, when nano-titanium dioxide dispersion was not added to the modified impregnation solution or was replaced with nano-silica, it can be seen that the anti-aging performance was significantly reduced, and its anti-aging durability was also significantly reduced.

[0056] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A method for preparing an anti-aging curtain fabric, characterized in that, Includes the following steps: S1. Base fabric pretreatment: First, the base fabric is cleaned to obtain a pretreated base fabric; S2. The pretreated base fabric is impregnated in a modified impregnation solution containing aminosilane coupling agent, nano titanium dioxide dispersion, genipin and PAMAM, and then dried to obtain the modified base fabric. S3. Prepare an anti-UV coating liquid and then form an anti-UV coating on the modified base fabric. The anti-UV coating liquid includes at least acrylic resin, UV absorber, free radical scavenger, aziridine crosslinking agent, and solvent.

2. The method for preparing an anti-aging curtain fabric according to claim 1, characterized in that: In step S2, the modified impregnation solution comprises the following raw materials in parts by weight: 5-10 parts γ-aminopropyltriethoxysilane, 10-20 parts nano titanium dioxide, 2-5 parts hydroxyethyl cellulose, 1-3 parts genipin, 3-5 parts PAMAM, 20-30 parts ethanol and 35-50 parts water.

3. The method for preparing an anti-aging curtain fabric according to claim 2, characterized in that: In step S2, 3-5 parts by weight of glycine are also added to the modified impregnation solution.

4. A method for preparing an anti-aging curtain fabric according to claim 2 or 3, characterized in that: The modified impregnation solution is prepared by the following method: Ethanol and half the amount of water were mixed, hydroxyethyl cellulose was added, and then nano-titanium dioxide was added. The mixture was ultrasonically dispersed to obtain a nano-titanium dioxide dispersion. The remaining water, PAMAM, γ-aminopropyltriethoxysilane, and the remaining raw materials were mixed and dispersed. Then, nano-titanium dioxide dispersion was added, and the pH value was adjusted to 4-5. After stirring, the modified impregnation solution was obtained.

5. The method for preparing an anti-aging curtain fabric according to claim 1, characterized in that: In step S2, the immersion temperature is 45-60℃, the immersion time is 1-2 hours, and the immersion pressure is 0.3-0.5 MPa.

6. The method for preparing an anti-aging curtain fabric according to claim 1, characterized in that: The UV-resistant coating liquid in step S3 comprises the following raw materials in parts by weight: 5-10 parts ultraviolet absorber, 3-5 parts free radical scavenger, 12-18 parts acrylic resin, 0.5-3 parts aziridine crosslinking agent, 20-30 parts water, and 40-50 parts ethanol.

7. The method for preparing an anti-aging curtain fabric according to claim 1, characterized in that: The specific operation in step S3 is as follows: prepare the anti-UV coating liquid, then dip and roll the modified base fabric in the anti-UV coating liquid through a two-dip two-roll process with a roll-off rate of 65-70%, and then perform heat curing treatment. Specifically, the heat curing treatment is to first pre-bake at 80-90℃ for 5-10 minutes, and then heat up to 150-160℃ to dry for 3-10 minutes to form an anti-UV coating.

8. The method for preparing an anti-aging curtain fabric according to claim 1, characterized in that: After obtaining the modified base fabric in step S2, a transition bonding coating is first applied to the surface of the modified base fabric and then cured to form a transition bonding layer. The transition bonding coating is prepared by the following method: After mixing polyurethane prepolymer with nano-montmorillonite, 2-hydroxyethyl acrylate is added. After heating to 80-90℃, dibutyltin dilaurate is added. After reacting for 2-3 hours, acrylate monomer and initiator are added. After reacting at 70-80℃ for 1-2 hours, water is added after cooling to room temperature to form a transitional bonding coating.

9. The method for preparing an anti-aging curtain fabric according to claim 8, characterized in that: When preparing the transition bonding coating, the mass ratio of polyurethane prepolymer to nano-montmorillonite is 1:(0.2-0.3), the amount of 2-hydroxyethyl acrylate added is 3-5 wt% of polyurethane prepolymer, the amount of dibutyltin dilaurate added is 0.5-1 wt% of polyurethane prepolymer, the mass ratio of polyurethane prepolymer to acrylate monomer is 1:(0.8-1.2), the amount of initiator added is 1-3 wt% of acrylate monomer, and the amount of water added is 40-50 wt% of polyurethane prepolymer.

10. An anti-aging curtain fabric, characterized in that: It is prepared by the preparation method according to any one of claims 1-9.

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