Coating finishing method for improving sound insulation and heat insulation performance of curtain fabric

Abstract

The invention provides a coating finishing method for improving sound insulation and heat insulation performance of a curtain fabric, and belongs to the technical field of curtain fabric preparation methods. Comprising a fabric body, a bionic structural body, a phase change composite layer, a protection function layer and an intelligent response layer, the fabric body is located on the side away from a window, the bionic structural body is arranged outside the side, close to the window, of the fabric body, the phase change composite layer is arranged outside the bionic structural body, and the protection function layer is arranged outside the phase change composite layer; according to the invention, multifunctional synergistic interaction can be realized, sound absorption, heat insulation, protection and intelligent response functions are gathered and integrated, through Helmholtz resonance and scattering coupling, full-band noise reduction and alternating reflection film + phase change microcapsule design are realized, the intelligent layer shape memory polymer is combined, the surface temperature is dynamically regulated and controlled, and the sound absorption, heat insulation, protection and intelligent response functions are realized. The super-hydrophobic layer is combined with the ZnO / TiO2 anti-aging layer, the washing durability reaches more than 30 times, and the carbon emission of the bio-based fluorosilicone resin is reduced by 60%.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of window curtain fabric preparation methods, in particular to a coating finishing method for improving the sound insulation and heat insulation performance of window curtain fabric. BACKGROUND

[0002] As an important element of home decoration and function combination, the fabric selection of window curtains directly affects the space atmosphere and use experience. In the early days, natural materials such as coarse cloth and leather were mainly used for shading and warmth retention; after the industrial revolution, natural fibers such as cotton, hemp and silk became the mainstream due to their breathability and texture, while synthetic fibers quickly popularized due to their durability and easy-to-care features.

[0003] The existing window curtain fabric has insufficient sound insulation performance. Traditional coatings have a dense structure and reflect strong high-frequency sound waves, but lack porous sound-absorbing structures, making it difficult to consume mid-to-low-frequency sound wave energy. Increasing the thickness of the coating can improve sound insulation, but it will make the fabric stiff and poor in breathability, affecting the use experience. Conventional coatings rely only on color reflection and cannot efficiently reflect near-infrared waves, limiting the summer heat insulation effect. Although some coatings reflect radiant heat, they do not solve the problem of heat conduction through fabric pores, and heat is still transferred through contact with the surface of the window curtain. Static heat insulation design cannot cope with the changes in day and night temperature, and lacks active temperature regulation function. Therefore, the present application provides a coating finishing method for improving the sound insulation and heat insulation performance of window curtain fabric to meet the needs. SUMMARY

[0004] The present application provides a coating finishing method for improving the sound insulation and heat insulation performance of window curtain fabric, which can achieve multifunctional synergistic effect, integrate sound absorption, heat insulation, protection and intelligent response functions, realize full-band noise reduction through Helmholtz resonance and scattering coupling, and dynamically regulate surface temperature through alternating reflection film + phase change microcapsule design combined with intelligent layer shape memory polymer. The combination of super-hydrophobic layer and ZnO / TiO2 anti-aging layer provides washing durability of more than 30 times, and the bio-based fluorosilicon resin reduces carbon emissions by 60%.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] The application discloses a coating finishing method for improving sound insulation and heat insulation performance of curtain fabric, which comprises a fabric main body, a bionic structure, a phase change composite layer, a protective functional layer and a smart response layer, wherein the fabric main body is located at a side far from a window, the bionic structure is arranged outside the fabric main body at a side close to the window, the phase change composite layer is arranged outside the bionic structure, the protective functional layer is arranged outside the phase change composite layer, and the smart response layer is arranged outside the protective functional layer; the bionic structure is distributed with a sound absorption layer, a sound wave scattering layer and an infrared reflection layer from a side towards the window; the phase change composite layer is mainly composed of water-based polyurethane and uniformly distributed with microcapsules; the protective functional layer is mainly composed of castor oil-based resin and uniformly distributed with TiO2 sol; and the smart response layer is distributed with a temperature and humidity response layer and a photochromic layer from the side towards the window.

[0007] Preferably, the fabric main body is composed of a base body, and the base body is in a cross section; and the fabric main body is provided with a rough surface on both sides to improve the adhesion of the coating.

[0008] Preferably, the sound absorption layer is in a whole porous gradient structure, the sound absorption layer is used for sound interception and absorption, the sound wave scattering layer is used for uniform scattering and distribution of sound waves, and the infrared reflection layer is used for reflection of external infrared light; the whole thickness of the sound absorption layer is mm, the whole thickness of the sound wave scattering layer is less than or equal to nm, and the whole thickness of the infrared reflection layer is in a range of -nm.

[0009] Preferably, the microcapsule is internally divided into a core material and a wall material, the wall material wraps the core material, and the whole thickness of the phase change composite layer is pm.

[0010] Preferably, the castor oil-based resin forms a super-hydrophobic surface with a contact angle greater than ° on the surface of the protective functional layer, the TiO2 sol is used for ultraviolet curing, and the thickness of the protective functional layer is in a range of -pm.

[0011] Preferably, the smart response layer is distributed with a temperature and humidity response layer and a photochromic layer from the side towards the window, the temperature and humidity response layer is mainly composed of water-based acrylic resin and mixed with a shape memory polymer, and the photochromic layer is mainly composed of PMM resin and mixed with WO3 sol.

[0012] Preferably, the temperature and humidity response layer is used for regulating air permeability and sound insulation effect, and the photochromic layer is used for self-adaptive regulation of light transmittance according to light intensity.

[0013] The application discloses a coating finishing method for improving sound insulation and heat insulation performance of curtain fabric, which comprises the following operation steps.

[0014] Compared with the prior art, the application has at least the following beneficial effects:

[0015] Fabric body (1) is prepared by bionic porous gradient structure, drawing on the layered sound absorption principle of bat wing membrane, a "honeycomb sound absorption layer + reflective insulation layer" composite structure is constructed, the gradient structure takes into account sound absorption and reflection, gradient aperture matches different wavelength sound waves, the thickness is reduced by 30% compared with traditional sound-absorbing cotton.

[0016] Bionic structure (2) encapsulates phase change material in chitosan-gelatin microcapsules, disperses in coating, PCM melts and absorbs heat above 28℃, inhibits the rise of curtain surface temperature, solidifies and releases stored heat when temperature drops, reduces indoor heat loss, so as to achieve synergistic effect, the surface temperature of the coating is reduced by 8-12℃ under summer solar radiation, and the indoor heat preservation efficiency is improved by 15% in winter.

[0017] Phase change composite layer (3) adopts castor oil derived polyurethane grafted fluorosilicone resin to construct lotus effect surface, super-hydrophobic surface reduces dust adhesion, maintains coating pore unobstructed, long-term maintains sound absorption performance, loaded TiO2 nanoparticles decompose VOC under ultraviolet light, improves indoor air quality.

[0018] Protection function layer (4) introduces shape memory polymer, when the environmental humidity is greater than 60%, the coating micropore expands to enhance the air permeability; shrinkage sealing when dry, balance sound insulation and breathing performance, doped with tungsten oxide nanocrystals, the coating color deepens under ultraviolet irradiation, the visible light transmittance is reduced by 15%-30%, realizing self-adaptive sunshade. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to implement and use the application.

[0020] Figure 1 It is the overall structure side view of the curtain fabric;

[0021] Figure 2 It is the structure schematic diagram of the fabric body;

[0022] Figure 3 It is the structure schematic diagram of the bionic structure;

[0023] Figure 4 It is the structure schematic diagram of the phase change composite layer;

[0024] Figure 5 It is the structure schematic diagram of the protection function layer;

[0025] Figure 6 It is the structure schematic diagram of the temperature and humidity response layer.

[0026] 1, fabric main body; 101, base body; 102, wool polishing surface; 2, bionic structure; 201, sound absorption layer; 202, sound wave scattering layer; 203, infrared reflection layer; 3, phase change composite layer; 301, water-based polyurethane; 302, microcapsule; 302A, core material; 302B, wall material; 4, protective functional layer; 401, castor oil-based resin; 402, TiO2 sol; 5, intelligent response layer; 501, temperature and humidity response layer; 501A, water-based acrylic resin; 501B, shape memory polymer; 502, photochromic layer; 502A, PMMA resin; 502B, WO3 sol.

[0027] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application to the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0028] The coating finishing method for improving the sound insulation and heat insulation performance of window curtain fabric provided by the present application is described in detail below in combination with the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0029] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, when a specific feature, structure or property is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize such a feature, structure or property in combination with other embodiments, whether or not it is explicitly described.

[0030] Generally, the terms can be understood at least in part from the context of their use. For example, depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, whether large or small, whether related or unrelated to each other. In addition, the term "based on" can be understood as not necessarily intending to convey a set of exclusive factors, but can instead, at least in part, depend on the context, allowing the presence of other factors not necessarily explicitly described.

[0031] It is to be understood that the terms "on", "over", and "above", as used herein, are to be interpreted in the broadest context possible so that "on" not only means "directly on" something but also includes the meaning of being "on" something with intervening characteristics or layers therebetween, and "over" or "above" not only means "over" or "above" something but also can include the meaning of being "over" or "above" something with no intervening characteristics or layers therebetween.

[0032] In addition, spatially relative terms, such as "under", "below", "lower", "over", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0033] Embodiment 1

[0034] A coating finishing method for improving sound and heat insulation performance of a curtain fabric, comprising a fabric body 1, a biomimetic structure 2, a phase change composite layer 3, a protective functional layer 4, and a smart response layer 5, the fabric body 1 is located away from the window side, the biomimetic structure 2 is arranged outside the fabric body 1 close to the window side, the phase change composite layer 3 is arranged outside the biomimetic structure 2, the protective functional layer 4 is arranged outside the phase change composite layer 3, and the smart response layer 5 is arranged outside the protective functional layer 4, the biomimetic structure 2 is distributed with a sound absorption layer 201, a sound wave scattering layer 202, and an infrared reflection layer 203 along the direction towards the window side, the phase change composite layer 3 takes water-based polyurethane 301 as a matrix and is uniformly distributed with microcapsules 302, the protective functional layer 4 takes castor oil-based resin 401 as a matrix and is uniformly distributed with TiO2 sol 402, and the smart response layer 5 is distributed with a temperature and humidity response layer 501 and a photochromic layer 502 along the direction towards the window side.

[0035] In the preparation, high-strength polyester fabric is selected, both sides are sanded to form a rough surface with a roughness Ra of 3-5 μm, then the fabric is treated in an ultrasonic bath in a 1:1 volume ratio of ethanol / water solution for 15 minutes to remove oil and impurities, and finally the fabric is treated by a capacitively coupled plasma instrument with a flow ratio of 3:1 of Ar / O2 mixed gas at a power of 100 W for 30 seconds to complete the preparation of the main body 1 of the fabric. PET and PVDF are dissolved in a 3:7 mixed solvent of DMF / THF at a mass ratio of 8:2, and the total concentration is controlled at 12wt%. After magnetic stirring for 24 hours and ultrasonic debubbling for 30 minutes, a fiber mat with a thickness of about 2mm is formed by a high-voltage electrostatic spinning machine for 4 hours to complete the preparation of the sound-absorbing layer 201. Ti3C2T x The powder is dispersed in isopropanol with a concentration of 0.5mg / mL, mixed thoroughly, and then oscillated at a frequency of 40kHz for 60 minutes to ensure that the nanosheets are fully exfoliated. Then, the sound wave scattering layer 202 is prepared by repeating the spraying process 3 times using an ultrasonic atomizing sprayer, controlling the total thickness to be less than 50nm, and then naturally air-drying.

[0036] The Al2O3 target and SiO2 target are alternately deposited 5 times by a radio frequency magnetron sputtering instrument, with a total thickness controlled in the range of 50-60nm and a uniformity error of less than ±2nm for each layer, to complete the preparation of the infrared reflecting layer 203. Mix n-octadecane and stearic acid at a mass ratio of 9:1, heat to 60°C to melt, and then form an emulsion with a particle size of 10-50μm by high-speed shear emulsification. Slowly add the chitosan-gelatin aqueous solution to the emulsion and continue stirring for 30 minutes. Finally, add glutaraldehyde solution and cure at room temperature for 2 hours to form microcapsules. Disperse the microcapsules in water-based polyurethane, ensure uniformity by mechanical stirring during the process, then spray using an air spray gun, and finally dry the coating by 60°C hot air circulation for 10 minutes to complete the preparation of the phase change composite layer 3. Castor oil and IPDI are reacted at a molar ratio of 1:1.2, stirred at 80°C for 2 hours, then FA-711 fluorosilicon resin is added and stirred at 80°C for 4 hours to form a hydroxyl-terminated prepolymer. TiO2 is modified with silane coupling agent KH-570, dispersed by ultrasonic, then added to the resin and stirred uniformly by mechanical stirring. Finally, the protective functional layer 4 is coated by knife coating with a wet film thickness of 50μm.

[0037] The poly-ε-caprolactone copolymer and diatomite are mixed in a mass ratio of 7:3, melted and stirred at 120°C for 1 hour, crushed to a particle size of <10 μm after cooling, dispersed in an aqueous acrylic resin, and finally coated by air spraying, with a single wet film thickness controlled at 20 μm to complete the coating of the temperature and humidity response layer 501. The tungstic acid is dissolved in ethanol, oxalic acid is added as a stabilizer, and the mixture is hydrolyzed at 80°C for 2 hours to form a WO3 sol. The PMMA resin and the WO3 sol are mixed in a volume ratio of 9:1, and the mixture is spin-coated on the surface of the substrate. Finally, the photochromic layer 502 is coated by UV curing under the conditions of a wavelength of 365 nm, an illumination intensity of 100 mW / cm 2 and a treatment time of 5 minutes.

[0038] Example 2

[0039] In the coating of each layer in Example 1, supercritical CO2 foaming is used to replace traditional organic solvents. The characteristics of liquid solubility and gas diffusibility in the supercritical state of CO2 enable physical foaming to form a microporous structure. The polymer substrate is immersed in a supercritical CO2 fluid, and CO2 rapidly penetrates into the material interior, ensuring that the coating can be more finely immersed in the matrix and ensuring adhesion stability. The microporous structure also provides high specific strength, sound and heat insulation performance.

[0040] The present application encompasses any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of the present application. In order to provide the public with a thorough and complete disclosure of the present application, specific details of the preferred embodiments of the present application are described in detail below, and the present application can be fully understood by those skilled in the art without these details. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0041] The above description is only the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A coating for improving the sound and heat insulation properties of a window covering fabric, characterized in that, It includes fabric body (1), bionic structure (2), phase change composite layer (3), protective function layer (4) and intelligent response layer (5), the fabric body (1) is located away from the window side, the bionic structure (2) is arranged in the fabric body (1) near the window side outside, the phase change composite layer (3) is arranged in the bionic structure (2) outside, the protective function layer (4) is arranged in the phase change composite layer (3) outside, the intelligent response layer (5) is arranged in the protective function layer (4) outside, the bionic structure (2) is along the sound-absorbing layer (201), sound wave scattering layer (202) and infrared reflection layer (203) three layers distributed to the window side direction, the phase change composite layer (3) is with water-based polyurethane (301) as the main body and uniformly distributed with microcapsule (302), the protective function layer (4) is with castor oil-based resin (401) as the main body and uniformly distributed with TiO2Sol (402), the intelligent response layer (5) is along the temperature and humidity response layer (501) and photochromic layer (502) two layers distributed to the window side direction.

2. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 1, wherein The fabric body (1) is composed of a base body (101), the base body (101) is cross-shaped in cross section, and the fabric body (1) is provided with a rough surface (102) on both sides to improve the adhesion of the coating.

3. The coating for improving sound and heat insulation performance of window curtain fabric according to claim 1, characterized in that, The sound-absorbing layer (201) is a porous gradient structure, the sound-absorbing layer (201) is used for sound interception and absorption, the sound wave scattering layer (202) is used for uniform scattering of sound waves, and the infrared reflection layer (203) is used for reflection of external infrared light, the overall thickness of the sound-absorbing layer (201) is 0.3mm, the overall thickness of the sound wave scattering layer (202) is ≤50nm, and the overall thickness of the infrared reflection layer (203) is in the range of 20-30nm.

4. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 1, wherein The microcapsule (302) is divided into core material (302A) and wall material (302B), the wall material (302B) wraps the core material (302A) inside, and the overall thickness of the phase change composite layer (3) is 50μm.

5. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 1, wherein The castor oil-based resin (401) forms a super-hydrophobic surface on the surface of the protective function layer (4) with a contact angle >150°, the TiO2Sol (402) is used for ultraviolet light curing, and the thickness of the protective function layer (4) is in the range of 10-15μm.

6. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 1, wherein The intelligent response layer (5) is along the temperature and humidity response layer (501) and photochromic layer (502) two layers distributed to the window side direction, the temperature and humidity response layer (501) is with water-based acrylic resin (501A) as the main body and mixed shape memory polymer (501B), and the photochromic layer (502) is with PMMA resin (502A) as the main body and mixed WO3Sol (502B).

7. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 1, wherein The temperature and humidity response layer (501) is used to regulate the air permeability and sound insulation effect, and the photochromic layer (502) is used to adaptively regulate the light transmittance according to the light intensity.

8. The coating for improving sound and heat insulation performance of a window curtain fabric according to claim 2, characterized in that, It includes the following operation steps: Fabric body (1) base treatment and pretreatment: High-strength polyester fabric is selected, both sides of which are subjected to sandpaper milling treatment, the surface roughness is controlled in the range of Ra 3-5 μm, then the oil stains and impurities are removed by ultrasonic treatment in a volume ratio of 1:1 ethanol / water solution for 15 minutes, and finally the capacitive coupled plasma instrument is used to treat the fabric under the conditions of Ar / O2 mixed gas with a flow ratio of 3:1, power of 100 W and treatment time of 30 seconds; Preparation of the biomimetic porous gradient structure body (2):

1. Preparation of electrospun nanofiber mat: PET and PVDF are dissolved in a DMF / THF (3:7) mixed solvent at a mass ratio of 8:2, and the total concentration is controlled at 12 wt%. After 24 hours of magnetic stirring, ultrasonic debubbling is performed for 30 minutes. Then, a fiber mat with a thickness of about 2 mm is collected by a high-voltage electrospinning machine for 4 hours; 2. Preparation of MXene dispersion: Ti3C2T x The powder was dispersed in isopropanol with a concentration of 0.5 mg / mL, mixed thoroughly, and then oscillated at a frequency of 40 kHz for 60 minutes to ensure that the nanosheets were fully exfoliated. The sample was then sprayed three times using an ultrasonic atomization sprayer, and then allowed to dry naturally after the total thickness was controlled to be < 50 nm.

3. Magnetron sputtering process: Al2O3 and SiO2 targets are alternately deposited 5 times by a radio frequency magnetron sputtering instrument, with a total thickness controlled in the range of 50-60 nm and an error of <±2 nm for each layer; Phase change composite layer (3) dynamic thermal insulation system of phase change microcapsules:

1. Microcapsule preparation: First, mix n-octadecane and stearic acid at a mass ratio of 9:1 and heat to 60°C to melt. High-speed shearing emulsification is used to form an emulsion with a particle size of 10-50 μm. Slowly add the chitosan-gelatin aqueous solution to the emulsion and continue stirring for 30 minutes. Finally, add glutaraldehyde solution and solidify at room temperature for 2 hours to form microcapsules; 2. Coating integration: First, disperse the microcapsules in water-based polyurethane, ensuring uniformity through mechanical stirring. Then, use an air spray gun for spraying. Finally, dry the coating by circulating hot air at 60°C for 10 minutes; Protective functional layer (4) bio-based super-hydrophobic self-cleaning coating: First, react castor oil with IPDI at a molar ratio of 1:1.2 at 80°C for 2 hours. Then, add FA-711 fluorosilicon resin and stir at 80°C for 4 hours to form a hydroxyl-terminated prepolymer. Modify TiO2 with silane coupling agent KH-570, disperse by ultrasonic, and then add to the resin and stir uniformly. Finally, use a doctor blade to coat, with a wet film thickness of 50 μm; Intelligent response layer (5) intelligent response coating technology:

1. Temperature and humidity response layer: Mix polycaprolactone-ε-caprolactone copolymer with diatomite at a mass ratio of 7:3 and melt stir at 120°C for 1 hour. After cooling, crush to a particle size of <10 μm and disperse in water-based acrylic resin. Finally, use air spraying, with a single wet film thickness of 20 μm; 2. Photochromic layer: Firstly, tungstic acid was dissolved in ethanol, and oxalic acid was added as a stabilizer. The mixture was hydrolyzed at 80 °C for 2 hours to form a WO3 sol. PMMA resin and the WO3 sol were mixed at a volume ratio of 9:1, and then spin-coated on the surface of a substrate. Finally, the mixture was treated under UV light at a wavelength of 365 nm and an intensity of 100 mW / cm 2 for 5 minutes to perform UV curing.

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