Phase change microcapsule energy storage fabric

Abstract

The invention relates to the field of fabrics, provides a phase change microcapsule energy storage fabric, and solves the defect that a phase change fabric in the prior art is not washable. Comprising a fabric body, the fabric body is formed by blending kapok fiber and bio-based degradable fiber, the kapok fiber is of a hollow structure, the hollow structure of the kapok fiber is filled with a microcapsule phase change material, and the microcapsule phase change material is filled into the hollow structure of the kapok fiber in a dipping mode. The bio-based degradable fiber is formed by compounding regenerated nylon and bio-based spandex fiber, and the microcapsule phase change material is composed of a microcapsule shell and a phase change core material wrapped in the microcapsule shell.

Description

Technical Field

[0001] The present invention relates to the field of fabrics, and in particular to a phase-change microcapsule energy storage fabric. Background Art

[0002] The existence state of matter usually consists of three phases: solid phase, liquid phase and gas phase. The change of matter from one phase to another is called phase change. Phase change energy storage technology can store and release energy through the reversible phase change of matter. It has the advantages of large heat storage capacity, stable phase change process and high energy utilization rate. It is widely used in temperature control energy storage fields such as building insulation, aerospace, solar energy utilization and smart temperature-regulating textiles.

[0003] At present, phase change materials are mainly applied to fabrics through post-finishing methods. The post-finishing method mainly applies phase change microcapsules to the fabric surface by coating or dipping. The operation is simple and convenient, but the water washing fastness is poor and the microcapsules are easy to fall off. The chemical composition of the microcapsule wall material, adhesive and fiber surface must be well combined.

[0004] Chinese Patent Publication No. CN105648782B discloses a method for preparing a paraffin phase change microcapsule temperature regulating fabric, comprising the following preparation steps: Step 1: 0.5-1 parts by weight of trimesoyl chloride and 10-15 parts by weight of paraffin are melted together, and 2-3 parts by weight of polyoxyethylene oleate and 10-15 parts by weight of deionized water are added, and stirred at 50-60°C for 20-30 minutes, followed by adding acetic acid and stirring until the pH reaches 5-6 to obtain a paraffin emulsion; Step 2: Under stirring and 30-40°C, 0.1-0.3 parts by weight of melamine-formaldehyde prepolymer are added to the paraffin emulsion of step 1, the temperature is raised to 60°C, kept warm for 2 hours, and then the temperature is cooled to between 20-30°C to obtain a mixed solution; Step 3: Under stirring and 30-40°C, 0.3-0.5 parts by weight of melamine-formaldehyde prepolymer are added to the mixed solution of step 2. The invention relates to a method for preparing a temperature-regulating fabric of the present invention. The method comprises the following steps: heating a melamine-formaldehyde prepolymer to 60°C, maintaining the temperature for 2 hours, then heating the prepolymer to 80°C, maintaining the temperature for 2 hours, and then adding 0.1-0.2 parts by weight of urea to obtain paraffin phase-change microcapsules; step 4: washing the fabric and drying it at 40-50°C for 20-30 minutes; step 5: evenly coating the fabric treated in step 4 with a layer of coating adhesive, followed by a layer of paraffin phase-change microcapsules, with the thickness of the paraffin phase-change microcapsules being 0.01-0.02 mm; and step 6: drying the fabric treated in step 5 at 60-70°C for 10-20 minutes, and then drying it at 120-150°C for another 5-10 minutes. The method achieves temperature regulation through phase-change microcapsules by first coating the fabric with a layer of coating adhesive and then a layer of paraffin phase-change microcapsules. The fabric obtained in this way can provide a more comfortable wearing environment for the human body, but it is not washable. The coating material easily falls off after repeated washing, and thus cannot play the temperature regulating function. Summary of the Invention

[0005] Therefore, in response to the above problems, the present invention provides a phase change microcapsule energy storage fabric to solve the defect of the phase change fabric in the prior art that it is not resistant to washing.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A phase-change microcapsule energy storage fabric comprises a fabric body, wherein the fabric body is blended by kapok fiber and bio-based degradable fiber, wherein the kapok fiber and the bio-based degradable fiber are blended in a ratio of 70:30-80:20, the kapok fiber having a hollow structure, the hollow structure of the kapok fiber being filled with an elastic shell microcapsule phase-change material, the elastic shell microcapsule phase-change material being filled into the hollow structure of the kapok fiber by impregnation, the bio-based degradable fiber being a composite of regenerated nylon and bio-based spandex fiber, the elastic shell microcapsule phase-change material being composed of elastic shell microcapsules and a phase-change core material wrapped in the elastic shell microcapsules, the weight ratio of the elastic shell microcapsules to the phase-change core material being 15:85-35:65, and the phase-change temperature of the phase-change core material being 36°C-37.5°C.

[0007] Further: The specific process of filling the elastic shell microcapsule phase change material into the hollow structure of kapok fiber is: (1) The kapok fiber yarn is placed in 95°C-100°C water and scoured for 20-30 minutes, and then the kapok fiber yarn is moved into a NaOH solution with a concentration of 3g / L-5g / L and a temperature of 95°C-100°C and continued to be scoured for 20-30 minutes, with the bath ratio controlled at 1:16-1:12; (2) washing the kapok fiber yarn with clean water until the pH value is neutral, and air-drying; (3) preparing a microcapsule phase change material impregnation liquid, wherein the microcapsule phase change material impregnation liquid is prepared by mixing an acrylic adhesive, an elastic shell microcapsule phase change material, and water in a weight ratio of 7:20:73 to 10:25:65; The kapok fiber yarn air-dried in step (2) is placed in the elastic shell microcapsule phase change material impregnation solution and immersed for 30 minutes to 45 minutes, and the immersion temperature is controlled at 28°C to 30°C; (4) Drying: The drying temperature is controlled at 95℃-100℃.

[0008] Furthermore, the preparation method of the regenerated nylon is: using waste nylon material as raw material, after physical crushing, chemical dissolution, filtration and purification, preparing regenerated nylon chips through a melt spinning process, and then extruding through a screw extruder to form 70D / 24F low twist yarn.

[0009] Furthermore, the preparation method of the bio-based spandex fiber is: bio-based polyester diol is extracted from plant-derived raw materials through fermentation, reacted with diisocyanate to synthesize polyurethane prepolymer, and then prepared 10D-25D ultra-fine denier spandex fiber through a dry spinning process.

[0010] Furthermore, the plant-derived raw material is any one of corn starch, sugarcane bagasse, banana peel, and apple peel.

[0011] Furthermore, the elastic shell microcapsule is a biodegradable polymer, and the phase change core material is an n-octadecane phase change material.

[0012] Further: the biodegradable polymer is any one of polylactic acid, polyhydroxybutyrate or gelatin.

[0013] Furthermore: the weight ratio of the regenerated nylon to the bio-based spandex fiber is 60:40-70:30.

[0014] Further: The preparation process of the elastic shell microcapsule is: .

[0015] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The phase change microcapsule energy storage fabric of the present invention is a fabric body formed by blending kapok fiber and bio-based degradable fiber. The kapok fiber has a hollow structure, and the hollow structure of the kapok fiber is filled with an elastic shell microcapsule phase change material. The elastic shell microcapsule phase change material is filled into the hollow structure of the kapok fiber by impregnation. The phase change material is directly applied to the fiber, and the fiber is twisted into yarn and then woven into fabric. The obtained fabric has the function of phase change energy storage and temperature regulation, and the phase change material is not easy to fall off from the fabric and has the characteristics of water resistance.

[0016] 2. The phase change temperature of the phase change core material of the present invention is 36°C-37.5°C, which matches the temperature of the human body surface. The phase change core material is n-octadecane phase change material. When the human body surface temperature is high, it can absorb excess heat energy from the body surface, so that the body surface is in a more comfortable temperature environment.

[0017] 3. The fabric body is a blend of bio-based degradable fiber and kapok fiber. The bio-based degradable fiber is a composite of recycled nylon and bio-based spandex fiber. Both bio-based degradable fiber and kapok fiber are degradable materials and are more environmentally friendly.

[0018] 4. Furthermore, the kapok fiber is pretreated before the elastic shell microcapsule phase change material is filled into the hollow structure of the kapok fiber, which can remove the lignin on the surface of the kapok fiber, increase the porosity of the fiber, and improve the subsequent impregnation penetration rate.

[0019] Furthermore: the elastic shell microcapsules use polyethylene glycol block copolymers generated by the reaction of isophorone triisocyanate trimer and ethylenediamine, which have elasticity, improve the thermal stability and mechanical properties of the microcapsules, and can maintain better stability during the process of weaving fiber yarns into fabrics, so that the phase change material can play a role. DETAILED DESCRIPTION

[0020] Example 1

[0021] A phase-change microcapsule energy storage fabric comprises a fabric body, wherein the fabric body is blended by kapok fiber and bio-based degradable fiber, wherein the kapok fiber and the bio-based degradable fiber are blended in a ratio of 70:30, the kapok fiber has a hollow structure, the hollow structure of the kapok fiber is filled with a microcapsule phase change material, and the microcapsule phase change material is filled into the hollow structure of the kapok fiber by impregnation, the bio-based degradable fiber is a composite of regenerated nylon and bio-based spandex fiber, the weight ratio of the regenerated nylon to the bio-based spandex fiber is 60:40, the microcapsule phase change material consists of a microcapsule shell and a phase change core material wrapped in the microcapsule shell, the microcapsule shell is polylactic acid, the phase change core material is n-octadecane phase change material, the weight ratio of the microcapsule shell to the phase change core material is 15:85, and the phase change temperature of the phase change core material is 36°C-37.5°C.

[0022] The preparation method of the regenerated nylon comprises the following steps: using waste nylon material as raw material, physically crushing, chemically dissolving, filtering and purifying, preparing regenerated nylon slices through a melt spinning process, and then extruding through a screw extruder to form 70D / 24F low-twist yarn.

[0023] The preparation method of the bio-based spandex fiber comprises the following steps: extracting bio-based polyester diol from sugarcane bagasse through fermentation, reacting the bio-based polyester diol with diisocyanate to synthesize a polyurethane prepolymer, and then preparing 10D-25D ultra-fine denier spandex fiber through a dry spinning process.

[0024] The specific process of filling the microcapsule phase change material into the hollow structure of kapok fiber is as follows: (1) The kapok fiber yarn was placed in 95°C water and scouring for 30 minutes, and then the kapok fiber yarn was moved into a NaOH solution with a concentration of 3 g / L and a temperature of 95°C and continued to be scoured for 30 minutes, with the bath ratio controlled at 1:16; (2) washing the kapok fiber yarn with clean water until the pH value is neutral, and air-drying; (3) preparing a microcapsule phase change material impregnation liquid, wherein the microcapsule phase change material impregnation liquid is prepared by mixing an acrylic adhesive, a microcapsule phase change material, and water in a weight ratio of 7:20:73; placing the kapok fiber yarn air-dried in step (2) into the microcapsule phase change material impregnation liquid and immersing the yarn for 30 minutes, with the immersion temperature controlled at 30°C; (4) Drying: The drying temperature is controlled at 100℃.

[0025] Example 2

[0026] A phase-change microcapsule energy storage fabric comprises a fabric body, wherein the fabric body is blended by kapok fiber and bio-based degradable fiber, wherein the kapok fiber and the bio-based degradable fiber are blended in a ratio of 75:25, the kapok fiber has a hollow structure, the hollow structure of the kapok fiber is filled with a microcapsule phase-change material, and the microcapsule phase-change material is filled into the hollow structure of the kapok fiber by impregnation, the bio-based degradable fiber is a composite of regenerated nylon and bio-based spandex fiber in a weight ratio of 65:35, the microcapsule phase-change material consists of a microcapsule shell and a phase-change core material wrapped in the microcapsule shell, the microcapsule shell is an elastic shell microcapsule, the phase-change core material is an n-octadecane phase-change material, the weight ratio of the microcapsule shell to the phase-change core material is 28:72, and the phase-change temperature of the phase-change core material is 36°C-37.5°C.

[0027] The specific process of filling the microcapsule phase change material into the hollow structure of kapok fiber is as follows: (1) The kapok fiber yarn was placed in 98°C water and scoured for 25 min, and then the kapok fiber yarn was moved into a NaOH solution with a concentration of 4 g / L and a temperature of 98°C and continued to be scoured for 25 min, with the bath ratio controlled at 1:14; (2) washing the kapok fiber yarn with clean water until the pH value is neutral, and air-drying; (3) preparing a microcapsule phase change material impregnation liquid, wherein the microcapsule phase change material impregnation liquid is prepared by mixing an acrylic adhesive, a microcapsule phase change material, and water in a weight ratio of 9:22:69; The kapok fiber yarn air-dried in step (2) is placed in the microcapsule phase change material impregnation solution and immersed for 38 minutes, and the immersion temperature is controlled at 29°C; (4) Drying: The drying temperature is controlled at 98°C.

[0028] The preparation method of the regenerated nylon comprises the following steps: using waste nylon material as raw material, physically crushing, chemically dissolving, filtering and purifying, preparing regenerated nylon slices through a melt spinning process, and then extruding through a screw extruder to form 70D / 24F low-twist yarn.

[0029] The preparation method of the bio-based spandex fiber comprises the following steps: extracting bio-based polyester diol from corn starch through fermentation, reacting the bio-based polyester diol with diisocyanate to synthesize a polyurethane prepolymer, and then preparing 18D ultra-fine denier spandex fiber through a dry spinning process.

[0030] The phase change core material is n-octadecane phase change material.

[0031] The preparation process of the elastic shell microcapsule is as follows: .

[0032] Example 3 A phase-change microcapsule energy storage fabric comprises a fabric body, wherein the fabric body is blended by kapok fiber and bio-based degradable fiber, wherein the kapok fiber and the bio-based degradable fiber are blended in a ratio of 80:20, the kapok fiber having a hollow structure, the hollow structure of the kapok fiber being filled with a microcapsule phase-change material, the microcapsule phase-change material being filled into the hollow structure of the kapok fiber by impregnation, the bio-based degradable fiber being a composite of regenerated nylon and bio-based spandex fiber in a weight ratio of 70:30, the microcapsule phase-change material being composed of a microcapsule shell and a phase-change core material wrapped in the microcapsule shell, the weight ratio of the microcapsule shell to the phase-change core material being 35:65, and the phase-change temperature of the phase-change core material being 36°C-37.5°C.

[0033] The specific process of filling the microcapsule phase change material into the hollow structure of kapok fiber is as follows: (1) The kapok fiber yarn was placed in 100°C water and scouring for 30 minutes, and then the kapok fiber yarn was moved into a NaOH solution with a concentration of 5 g / L and a temperature of 100°C and continued to be scourred for 30 minutes, with the bath ratio controlled at 1:12; (2) washing the kapok fiber yarn with clean water until the pH value is neutral, and air-drying; (3) preparing a microcapsule phase change material impregnation liquid, wherein the microcapsule phase change material impregnation liquid is prepared by mixing an acrylic adhesive, a microcapsule phase change material, and water in a weight ratio of 10:25:65; The kapok fiber yarn air-dried in step (2) is placed in the microcapsule phase change material impregnation solution and immersed for 45 minutes, and the immersion temperature is controlled at 30°C; (4) Drying: The drying temperature is controlled at 100℃.

[0034] The preparation method of the regenerated nylon comprises the following steps: using waste nylon material as raw material, physically crushing, chemically dissolving, filtering and purifying, preparing regenerated nylon slices through a melt spinning process, and then extruding through a screw extruder to form 70D / 24F low-twist yarn.

[0035] The preparation method of the bio-based spandex fiber comprises the following steps: extracting bio-based polyester diol from banana through fermentation, reacting the bio-based polyester diol with diisocyanate to synthesize a polyurethane prepolymer, and then preparing 25D ultra-fine denier spandex fiber through a dry spinning process.

[0036] The microcapsule shell is gelatin, and the phase change core material is n-octadecane phase change material.

[0037] Comparative Example 1 Referring to Example 1, no microcapsule phase change material is added to the kapok fiber of this comparative example. The fabric body is blended by kapok fiber and bio-based degradable fiber. After the fabric body is woven, it is subjected to post-finishing treatment. During the post-finishing treatment, the fabric body is impregnated with a finishing liquid containing a microcapsule phase change material impregnation liquid. The microcapsule phase change material impregnation liquid is the same as that in Example 1.

[0038] The performance of the phase-transformed allantois energy storage fabrics of Examples 1 to 3 of the present invention and Comparative Example 1 was tested, and the results are as follows:

[0039] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A phase change microcapsule energy storage fabric, comprising a fabric body, characterized in that: The fabric body is blended by kapok fiber and bio-based degradable fiber, and the kapok fiber and bio-based degradable fiber are blended in a ratio of 70:30-80:

20. The kapok fiber has a hollow structure, and the hollow structure of the kapok fiber is filled with elastic shell microcapsule phase change material. The elastic shell microcapsule phase change material is filled into the hollow structure of the kapok fiber by impregnation. The bio-based degradable fiber is a composite of regenerated nylon and bio-based spandex fiber. The elastic shell microcapsule phase change material is composed of elastic shell microcapsules and a phase change core material wrapped in the elastic shell microcapsules. The weight ratio of the elastic shell microcapsules to the phase change core material is 15:85-35:65, and the phase change temperature of the phase change core material is 36°C-37.5°C.

2. The phase change microcapsule energy storage fabric according to claim 1, characterized in that: The specific process of filling the elastic shell microcapsule phase change material into the hollow structure of kapok fiber is as follows: (1) The kapok fiber yarn is placed in 95°C-100°C water and scoured for 20-30 minutes, and then the kapok fiber yarn is moved into a NaOH solution with a concentration of 3g / L-5g / L and a temperature of 95°C-100°C and continued to be scoured for 20-30 minutes, with the bath ratio controlled at 1:16-1:12; (2) washing the kapok fiber yarn with clean water until the pH value is neutral, and air-drying; (3) preparing a microcapsule phase change material impregnation liquid, wherein the microcapsule phase change material impregnation liquid is prepared by mixing an acrylic adhesive, an elastic shell microcapsule phase change material, and water in a weight ratio of 7:20:73 to 10:25:65; The kapok fiber yarn air-dried in step (2) is placed in the elastic shell microcapsule phase change material impregnation solution and immersed for 30 minutes to 45 minutes, and the immersion temperature is controlled at 28°C to 30°C; (4) Drying: The drying temperature is controlled at 95℃-100℃.

3. The phase change microcapsule energy storage fabric according to claim 1, characterized in that: The preparation method of the regenerated nylon comprises the following steps: using waste nylon material as raw material, physically crushing, chemically dissolving, filtering and purifying, preparing regenerated nylon slices through a melt spinning process, and then extruding through a screw extruder to form 70D / 24F low-twist yarn.

4. The phase change microcapsule energy storage fabric according to claim 1, characterized in that: The preparation method of the bio-based spandex fiber comprises the following steps: extracting bio-based polyester diol from plant-derived raw materials through fermentation, reacting the bio-based polyester diol with diisocyanate to synthesize a polyurethane prepolymer, and then preparing 10D-25D ultra-fine denier spandex fiber through a dry spinning process.

5. The phase change microcapsule energy storage fabric according to claim 4, characterized in that: The plant-derived raw material is any one of corn starch, sugarcane bagasse, banana peel and apple peel.

6. The phase change microcapsule energy storage fabric according to claim 1, characterized in that: The elastic shell microcapsule is a biodegradable polymer, and the phase change core material is an n-octadecane phase change material.

7. The phase-change microcapsule energy storage fabric according to claim 5, characterized in that: The biodegradable polymer is any one of polylactic acid, polyhydroxybutyrate or gelatin.

8. The phase-change microcapsule energy storage fabric according to claim 1, characterized in that: The weight ratio of the regenerated nylon to the bio-based spandex fiber is 60:40-70:

30.

9. The phase change microcapsule energy storage fabric according to claim 1, characterized in that: The preparation process of elastic shell microcapsules is as follows: 。

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