CN115365097B - Colored passive radiation refrigeration fabric and preparation method thereof - Google Patents

Colored passive radiation refrigeration fabric and preparation method thereof Download PDF

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Publication number
CN115365097B
CN115365097B CN202210969496.8A CN202210969496A CN115365097B CN 115365097 B CN115365097 B CN 115365097B CN 202210969496 A CN202210969496 A CN 202210969496A CN 115365097 B CN115365097 B CN 115365097B
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fabric
organic pigment
colored
passive radiation
coating
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CN115365097A (en
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易玲敏
徐帅
张佳文
蔡英
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Zhejiang Sci Tech University ZSTU
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Zhejiang Sci Tech University ZSTU
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B05D5/063—Reflective effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses a colored passive radiation refrigeration fabric, which comprises a fiber fabric, a passive radiation cooling coating and an organic pigment coating, wherein the passive radiation cooling coating and the organic pigment coating are sequentially coated on the surface of the fiber fabric; the passive radiation cooling coating is an inorganic particle coating; the inorganic particle coating has high reflectivity to visible light-near infrared sunlight and high emissivity at an atmospheric window of 8-13 mu m. The invention also discloses a preparation method of the colored passive radiation refrigeration fabric. The colored passive radiation refrigeration fabric is obtained by compounding and assembling a plurality of functional coatings, so that the common fiber fabric has excellent spectrum selection characteristics of high reflection of visible light and near infrared visible light and strong radiation of a middle infrared atmospheric window (8-13 mu m), and further can realize efficient radiation refrigeration under the sun illumination. Meanwhile, the colored coating of the outermost layer enables the fiber fabric to have a color effect, and the application range is wider.

Description

Colored passive radiation refrigeration fabric and preparation method thereof
Technical Field
The invention relates to the technical field of passive radiation refrigeration materials, in particular to a colored passive radiation refrigeration fabric and a preparation method thereof.
Background
As global climate warms, cities have an increasing demand for refrigeration, and in general, summer temperatures are generally above 37 ℃ for most cities in equatorial and subtropical regions. Studies have shown that by 2030, the annual cost of climate problems caused by high temperatures will reach $ 2.4 trillion. In order to reduce energy consumption and reduce harm caused by strong solar radiation in summer, radiation cooling in daytime is a passive radiation refrigeration mode without energy consumption.
The daytime passive radiation refrigeration utilizes the high reflectivity of the material itself to sunlight and the medium infrared high emissivity in the atmospheric window (8-13 μm), and can transfer heat from the atmospheric window to the outer space in a radiation mode, thereby achieving the effect of cooling without any energy input. The popularization of such materials is expected to greatly reduce the use of machines having a refrigerating effect such as an air conditioner, thereby effectively reducing the consumption of energy.
However, from the prior published reports, the radiation refrigeration performance of many radiation refrigeration materials under the condition of sunlight illumination in daytime has not met the practical requirements, more importantly, the examples of the use of colored daytime passive radiation refrigeration for fabrics still remain limited, and the prior researches mainly focus on the following aspects:
1) The colored inorganic pigment coating is combined with a polymer layer to achieve a multi-layer structure, wherein the inorganic pigment colored coating provides color, and the polymer layer enhances reflectivity and emissivity by adjusting the microstructure, such as by incorporating multi-sized pores in the polymer layer. The inorganic pigment coating with the structure can absorb the radiation energy generated by the light of the visible light wave band and also can absorb the radiation energy of partial infrared wave band, thereby reducing the whole cooling power.
2) By utilizing the structural color, the color is generated through the interaction (scattering, interference, diffraction and the like) between the constructed special structure and natural light, and the structural color can avoid radiation energy generated by light absorption, but compared with the color generated by pigment, the structural color is extremely light and far less in saturation, so that the practical application of the structural color is limited.
Chinese patent publication No. CN113388305A discloses a radiation refrigeration composite coating with structural color, which is prepared by introducing TiO into PMMA resin 2 TiO as highly reflective particles 2 The radiation refrigeration composite coating with structural color is prepared by taking Ag nano shell-core structural particles or pure Ag nano particles as color forming particles. High reflectivity of the coating to sunlight is achieved by TiO 2 The particles are ensured, the structural color as the color support is ensured by the local plasma resonance of the color forming nano particles, and the reflectivity of the composite coating on sunlight can reach 85.33% -86.33%. However, the overall color of the structural color source is pale and the use of Ag greatly increases cost.
The Chinese patent document with publication number of CN113136724A discloses a radiation refrigeration fabric, which improves the reflectivity of the whole material by introducing alumina particles with high refractive index to adhere to the fibers, so that the temperature can be reduced by 12 ℃ compared with that of cotton fabrics, the radiation refrigeration fabric has a considerable cooling effect, but the shedding property of the particles is considered, and the color is monotonous and only white, so that the radiation refrigeration fabric cannot meet the requirement of rich colors.
In addition, although the radiation refrigerating materials have a certain cooling effect, the influence of the actual environment on the cooling effect of the materials, such as the influence of raindrops, dust and the like on the reflectivity of the materials and the middle infrared emissivity, is not considered.
Disclosure of Invention
The invention provides a colored passive radiation refrigeration fabric and a preparation method thereof, which overcome the problems of poor cooling performance, complex preparation method, high cost and the like in the prior art and realize the industrialized application of the colored passive radiation refrigeration fabric.
The specific technical scheme of the invention is as follows:
a colored passive radiation refrigeration fabric comprises a fiber fabric, a passive radiation cooling coating and an organic pigment coating, wherein the passive radiation cooling coating and the organic pigment coating are sequentially coated on the surface of the fiber fabric; the passive radiation cooling coating is an inorganic nanoparticle coating modified by a silane coupling agent, and the inorganic nanoparticle coating has high reflectivity to visible light-near infrared sunlight and high emissivity in an air window of 8-13 mu m.
According to the invention, after the inorganic nano particles are modified, the inorganic nano particles are sprayed on the fabric, the modified inorganic particles are more tightly combined with the fabric and are not easy to fall off, and then organic pigment particles with certain reflection performance are sprayed to provide colors, so that the fabric with the color radiation cooling effect is obtained.
The inorganic nano particles are one or more of silicon dioxide, zinc oxide, titanium dioxide and aluminum oxide; the particle size of the inorganic nano particles is 200-1500 nm.
The silane coupling agent is one or more of gamma-methacryloxypropyl trimethoxysilane (KH 570), gamma-glycidoxypropyl trimethoxysilane (KH 560), gamma-aminopropyl triethoxysilane (KH 550), N-beta- (aminoethyl) -gamma-aminopropyl methyldimethoxysilane (KH 602) and N- (beta-aminoethyl) -gamma-aminopropyl trimethoxysilane (KH 792).
The alkoxy hydrolysis in the molecules of the silane coupling agents can react with inorganic materials to form strong chemical bonds, the epoxy and amino groups have the property of being organophilic, can interact with long molecular chains in the organic matters to generate chemical reactions or physical winding, improves the compatibility between the inorganic matters and organic polymers, firmly combines the two matters with larger difference in properties, and plays a role of a 'molecular bridge'. The invention utilizes the silane coupling agent to improve the interfacial adhesion between the inorganic substance and the fabric.
In the modification process, the dosage of the silane coupling agent has great influence on the modification success. When the dosage of the silane coupling agent is small, the silane coupling agent reacts with the hydroxyl on the surface of the silicon dioxide, so that the hydroxyl on the surface of the silicon dioxide is reduced, and the oleophilic degree is increased; however, when the amount thereof is too large, the Si atom in the silica-bonded silane coupling agent molecule is attacked by the siloxane anion generated by hydrolysis of the silane coupling agent, and the particles are bridged, thereby causing flocculation of the powder. Therefore, the mass percentage of the silane coupling agent is preferably 0.5 to 5% based on the mass of the inorganic nanoparticles.
Further preferably, the mass percentage of the silane coupling agent is 0.5 to 2% based on the mass of the inorganic nanoparticles.
Preferably, the colored organic pigment is organic pigment phthalocyanin blue BGS, F3RK permanent red or 1138 benzidine yellow.
Preferably, the organic pigment coating is obtained by spraying an organic pigment dispersion liquid and drying; the solvent of the organic pigment dispersion liquid is an aqueous solution of polyvinyl alcohol.
The polyvinyl alcohol added into the organic pigment dispersion liquid can form a film to fix the organic pigment particles, thereby ensuring the adhesion fastness of the organic pigment.
The fabric can be cotton fabric, polyester fabric, spandex fabric, acrylic fabric and the like.
Inorganic nano particles with different mass fractions are added into the inorganic nano particle dispersion liquid of the passive radiation coating, and the coating amount of the finally prepared radiation refrigeration fabric is different under the condition of the same fabric treatment, so that the passive radiation refrigeration effect is affected.
The organic pigment particles can reduce the reflectivity of the visible light wave band and improve the reflectivity of the near infrared wave band, and the partial refrigeration performance is sacrificed under the condition of introducing color as a whole; the polyvinyl alcohol added into the colored pigment dispersion liquid forms a polymer film after being dried, so that pigment particles can be fixed, and the middle infrared radiation performance can be improved.
Preferably, the inorganic particle suspension is sprayed on the fabric in a unit area in an amount of 0.2 to 0.8g/cm 2 The spraying amount of the organic pigment suspension is 0.02-0.03 g/cm 2 。
The invention also provides a preparation method of the colored passive radiation refrigeration fabric, which comprises the following steps:
(1) Dispersing inorganic nano particles in absolute ethyl alcohol to obtain inorganic nano particle dispersion liquid;
(2) Adding a silane coupling agent into the inorganic nanoparticle dispersion liquid, adding a solvent, stirring for 2-3 hours at 80-100 ℃, and modifying the inorganic nanoparticles to obtain a modified inorganic nanoparticle dispersion liquid;
(3) Dispersing a colored organic pigment in water containing a dispersing agent and polyvinyl alcohol to obtain an organic pigment dispersion;
(4) Spraying the modified inorganic nano particle dispersion liquid on the fabric by using a spray gun, drying, spraying the organic pigment dispersion liquid, and drying to obtain the colored passive radiation cooling refrigeration fabric.
In the inorganic particle dispersion liquid, the mass fraction of the modified inorganic nano particles is 5%.
In the step (2), the solvent is deionized water.
In the step (3), dispersing agent and polyvinyl alcohol are added into water, after ultrasonic dispersion, colored organic pigment is added, and ball milling is carried out, thus obtaining organic pigment dispersion liquid.
In the step (3), the mass ratio of the dispersing agent to the color organic pigment is 1:1 to 5; the addition amount of the polyvinyl alcohol is 2-10% based on the mass of water.
Compared with the prior art, the invention has the beneficial effects that:
the colored passive radiation refrigeration fabric provided by the invention is obtained by compositely assembling the multi-layer functional coating, so that the common fiber fabric has excellent visible-near infrared visible light high reflection and infrared strong radiation spectrum selection characteristics in an atmospheric window (8-13 mu m), and further high-efficiency radiation refrigeration under sunlight can be realized. Meanwhile, the outermost organic pigment coating enables the fiber fabric to have richer color display and has potential of being applied to wider fields.
The fabric with the radiation refrigeration function prepared by the invention can realize the radiation cooling effect on the premise of ensuring color, and has simple operation and wider application range.
Drawings
FIG. 1 is a visible-near infrared reflectance spectrum of the colored passive radiation refrigerating fabric of example 2;
FIG. 2 is an SEM image of a colored passive radiation refrigeration coating of example 2;
fig. 3 is a graph of temperature reduction versus the colored passive radiation refrigeration fabric of example 2 through a simulation device.
Detailed Description
In the following examples, the modified inorganic particles used were prepared by the following preparation process:
according to the stoichiometric ratio 1:19, accurately weighing a certain amount of silicon dioxide particles, ethanol and other raw materials, mixing the raw materials, performing ultrasonic dispersion for 25min by using a cell pulverizer, then dropwise adding 1% of silane coupling agent, dropwise adding 0.5% of deionized water, stirring in an oil bath at 90 ℃, reacting for 2-3 h, and finally obtaining the modified inorganic nanoparticle suspension. The particle size of the inorganic nano particles is 200-1500 nm.
Example 1
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH570 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of cotton fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
The spraying amount of the inorganic particle suspension liquid on the fabric in unit area is 0.2 to 0.8g/cm 2 The spraying amount of the organic pigment suspension is 0.02-0.03 g/cm 2 。
Example 2
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH550, and dripping 0.005 part of water, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of cotton fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
The spraying amount of the inorganic particle suspension liquid on the fabric in unit area is 0.2 to 0.8g/cm 2 The spraying amount of the organic pigment suspension is 0.02-0.03 g/cm 2 。
FIG. 1 is a graph of the visible-near infrared reflectance spectrum of the colored passive radiation refrigeration fabric of example 2, wherein the colored fabric absorbs specific wavelengths in the visible light band to exhibit a colored appearance, and has a low reflectance in the near infrared band to ensure a good radiation cooling effect;
FIG. 2 is an SEM image of a colored passive radiation refrigeration coating of example 2, where it can be seen in FIG. 2 that spherical inorganic particles are distributed on the fabric and pigment particles are distributed on a portion of the inorganic microspheroidal particles;
fig. 3 is a graph showing comparison of cooling of the colored passive radiation refrigeration fabric under the simulated light source, and it can be seen from fig. 3 that the colored passive radiation refrigeration fabric has excellent cooling effect.
Example 3
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH560 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of cotton fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
Example 4
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH602, and dripping 0.005 part of water, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of cotton fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
Example 5
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH792 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of cotton fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
Example 6
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH570 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of polyester fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
Example 7
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH570 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking a piece of spandex fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
Example 8
A color refrigerating fabric is prepared by the following steps:
1) Mixing 1 part of silicon dioxide particles into 19 parts of ethanol, performing ultrasonic dispersion for 25min, then adding 0.01 part of KH570 and 0.005 part of water dropwise, and modifying at 90 ℃ for 2-3 h to obtain modified inorganic particle suspension.
2) Adding a certain amount of organic pigment particles into deionized water containing dispersing agent and polyvinyl alcohol, performing ultrasonic dispersion for 20min, and stirring at 40 ℃ for 2-3 h to obtain an organic pigment aqueous solution. In the organic pigment aqueous solution, the concentration of the organic pigment is 0.1-0.2%, and the mass of the polyvinyl alcohol is 2-10% of the mass of water.
3) And (3) taking an acrylic fabric, spraying the inorganic particle suspension in the step (1) on the fabric for 2-3 times by using a spray gun, drying, and then spraying the organic pigment suspension in the step (2) on the fabric for 1-2 times, and drying.
The fabrics prepared in examples 1, 3-8 have similar radiant refrigeration effects as the fabrics prepared in example 2. The foregoing embodiments have described the technical solutions and advantages of the present invention in detail, and it should be understood that the foregoing embodiments are merely illustrative of the present invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like that fall within the principles of the present invention should be included in the scope of the invention.

Claims (6)

1. The colored passive radiation refrigeration fabric is characterized by comprising a fiber fabric, and a passive radiation cooling coating and an organic pigment coating which are sequentially coated on the surface of the fiber fabric; the passive radiation cooling coating is an inorganic nanoparticle coating modified by a silane coupling agent, and the inorganic nanoparticle coating has high reflectivity to visible light-near infrared sunlight and high emissivity in an air window of 8-13 mu m;
the inorganic nano particles are one or more of silicon dioxide, zinc oxide, titanium dioxide and aluminum oxide; the particle size of the inorganic nano particles is 200-1500 nm; based on the mass of the inorganic nano particles, the mass percentage of the silane coupling agent is 0.5-5%;
the organic pigment coating is obtained by spraying organic pigment dispersion liquid and drying; the solvent of the organic pigment dispersion liquid is an aqueous solution of polyvinyl alcohol;
the preparation method of the colored passive radiation refrigeration fabric comprises the following steps:
(1) Dispersing inorganic nano particles in absolute ethyl alcohol to obtain inorganic nano particle dispersion liquid;
(2) Adding a silane coupling agent into the inorganic nanoparticle dispersion liquid, stirring for 2-3 hours at 80-100 ℃, and modifying the inorganic nanoparticles to obtain a modified inorganic nanoparticle dispersion liquid;
(3) Dispersing a colored organic pigment in water containing a dispersing agent and polyvinyl alcohol to obtain an organic pigment dispersion;
(4) Spraying the modified inorganic nano particle dispersion liquid on the fabric by using a spray gun, drying, spraying the organic pigment dispersion liquid, and drying to obtain the colored passive radiation cooling refrigeration fabric.
2. The colored passive radiation refrigeration fabric of claim 1 wherein said silane coupling agent is one or more of gamma-methacryloxypropyl trimethoxysilane, gamma-glycidoxypropyl trimethoxysilane, gamma-aminopropyl triethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyl methyldimethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyl trimethoxysilane.
3. The colored passive radiation chiller fabric of claim 1 wherein said colored organic pigment is the organic pigment blue-green BGS, F3RK permanent red or 1138 benzidine yellow.
4. The colored passive radiation refrigeration fabric of claim 1, wherein the inorganic nanoparticle dispersion liquid spraying amount per unit area of the fabric is 0.2-0.8 g/cm 2 The spraying amount of the organic pigment dispersion liquid is 0.02-0.03 g/cm 2 。
5. The colored passive radiation refrigeration fabric of claim 1 wherein the mass ratio of dispersant to colored organic pigment is 1: 1-5.
6. The colored passive radiation refrigeration fabric according to claim 1, wherein the mass fraction of the modified inorganic nanoparticles in the modified inorganic nanoparticle dispersion is 5%.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213400A (en) * 2014-08-20 2014-12-17 浙江理工大学 Silicon dioxide antireflection coating liquid, preparation method of silicon-dioxide antireflection coating liquid and application of silicon-dioxide antireflection coating liquid in polyester fabrics
CN111607983A (en) * 2020-05-15 2020-09-01 浙江理工大学 Super-hydrophobic daytime passive radiation refrigeration fabric and preparation method thereof
CN113025133A (en) * 2021-02-07 2021-06-25 浙江理工大学 Super-hydrophobic daytime passive radiation refrigeration porous membrane and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110317521A (en) * 2019-07-05 2019-10-11 宁波瑞凌新能源科技有限公司 Selective radiation refrigeration coating and its composite material and methods for using them

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213400A (en) * 2014-08-20 2014-12-17 浙江理工大学 Silicon dioxide antireflection coating liquid, preparation method of silicon-dioxide antireflection coating liquid and application of silicon-dioxide antireflection coating liquid in polyester fabrics
CN111607983A (en) * 2020-05-15 2020-09-01 浙江理工大学 Super-hydrophobic daytime passive radiation refrigeration fabric and preparation method thereof
CN113025133A (en) * 2021-02-07 2021-06-25 浙江理工大学 Super-hydrophobic daytime passive radiation refrigeration porous membrane and preparation method thereof

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