CN113605098A - Moisture-conducting and heat-dissipating cool fabric and preparation method thereof - Google Patents
Moisture-conducting and heat-dissipating cool fabric and preparation method thereof Download PDFInfo
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Abstract
The invention provides a moisture-conducting heat-dissipating cool fabric and a preparation method thereof. The invention adopts the high heat conduction coating to realize the contact cool feeling and the uniform and quick heat conduction function; the one-way moisture-conducting function is realized by constructing a wetting gradient in the thickness direction, and the dryness of the skin contact layer is kept; meanwhile, polydopamine deposited on the outer layer is on the surface of the fiber, so that the specific surface area for sweat evaporation is increased, heat and moisture are further promoted to be discharged to the external environment, and dry and comfortable experience is brought to the human body.
Description
Technical Field
The invention belongs to the technical field of functional fabrics, and particularly relates to a moisture-conducting heat-dissipating cool fabric and a preparation method thereof.
Background
In order to solve the problems, people increase the sweat evaporation area by increasing the specific surface area, such as the irregular fiber section, the hollow or porous fiber increases water guide; or the surface of the hydrophobic fiber is modified by hydrophilicity to increase moisture absorption, but the discomfort of the skin-facing surface caused by bidirectional moisture conduction and the lower moisture evaporation rate still limit the practical application of the hydrophobic fiber. Therefore, a fabric which can keep a skin-attached surface dry and comfortable and can quickly perspire is needed. The unidirectional moisture-conducting fabric can guide moisture from the hydrophobic layer to the hydrophilic layer through capillary action and surface energy gradient, so that the interior is kept dry and comfortable. Patent CN102888754B discloses a polyester fabric with a unidirectional moisture-conducting and quick-drying function and a preparation method thereof, wherein polyester yarns are respectively subjected to hydrophilic treatment and hydrophobic treatment and then woven to prepare a multilayer composite fabric with the unidirectional moisture-conducting and quick-drying function, so that sweat is rapidly absorbed by an outer layer, and the interior is kept dry and comfortable. However, the multilayer structure undoubtedly increases the thickness of the fabric, affects ventilation and heat dissipation, increases the sense of thickness, easily gathers heat generated by a human body, is difficult to quickly discharge the heat out of the body, and has certain limitation on the cool feeling effect.
According to investigation, the current cool feeling fabric has the following defects: 1. the partial cool fabric is a multi-layer composite fabric, so that the thick and heavy feeling is brought, and the ventilation and heat dissipation are influenced; 2. the fabric with partial cool feeling is made of uniform raw materials, the pure hydrophilic fabric cannot ensure that the skin-attached surface is dry and comfortable when a large amount of sweat is produced, and the pure hydrophobic fabric cannot meet the requirement of quickly taking away the sweat. Therefore, the development of a single-layer cool fabric with contact cool feeling, moisture permeability and heat dissipation and an after-finishing method thereof are applied to sports clothes, surgical gowns and the like, and have important significance.
Disclosure of Invention
The invention aims to provide a cool fabric and a preparation method thereof aiming at the defects of the prior art, and the cool fabric adopts a high-heat-conductivity coating to realize the functions of cool contact and uniform and rapid heat conduction; the one-way moisture-conducting function is realized by constructing a wetting gradient in the thickness direction, and the dryness of the skin contact layer is kept; meanwhile, polydopamine deposited on the outer layer is on the surface of the fiber, so that the specific surface area for sweat evaporation is increased, heat and moisture are further promoted to be discharged to the external environment, and dry and comfortable experience is brought to the human body.
In order to achieve the purpose, the following invention proposal is provided:
a preparation method of a moisture-conducting heat-dissipating cool fabric comprises the following structures: the heat conduction type fabric comprises a hydrophilic fabric layer, a high heat conduction layer and a hydrophobic layer, wherein the hydrophilic fabric layer is a fabric modified by polydopamine in a hydrophilic mode, the high heat conduction layer is a high heat conduction coating containing microcapsules, and the hydrophobic layer is a coating with a single-side hydrophobic finish.
A preparation method of a moisture-conducting heat-dissipating cool fabric comprises the following steps: the method comprises the steps of firstly carrying out hydrophilic finishing on a substrate fabric by using a hydrophilic finishing agent to obtain a hydrophilic fabric layer, then carrying out silk-screen printing finishing on one side by using high-thermal-conductivity powder and microcapsule composite mucilage to obtain a high-thermal-conductivity layer, and finally carrying out electrostatic spraying on the other side, far away from the hydrophilic layer, of the high-thermal-conductivity layer by using a hydrophobic finishing agent to obtain a hydrophobic layer, so that the cool fabric with one-way moisture conduction and quick heat dissipation is finally obtained.
The preparation method of the hydrophilic fabric layer comprises the following steps: preparing Tris (hydroxymethyl) aminomethane hydrochloride (Tris-HCl) buffer solution, weighing a certain mass of dopamine, and adding the dopamine into the buffer solution to obtain a dopamine solution; and (3) soaking the base fabric in the dopamine solution, rinsing after the reaction is finished, and drying to obtain the hydrophilic modified fabric.
Specifically, the base material fabric is polyester, polypropylene, chinlon and polylactic acid fabric.
Specifically, the dopamine solution comprises Tris-HCl buffer solution and dopamine, and the concentration of the dopamine is 0.2-10 mg/mL. Wherein, Tris-HCl buffer solution: 0.01-10 parts of trihydroxymethyl aminomethane, 0.5-10 parts of dilute hydrochloric acid (0.02-2mol/L) and water until the amount reaches 100 parts. The preparation method comprises the following steps: weighing trihydroxymethyl aminomethane, dissolving in deionized water, and stirring to dissolve completely; adding dilute hydrochloric acid to adjust the pH value to 8-9 to obtain Tris-HCl buffer solution, weighing dopamine, dissolving in the buffer solution, and stirring until the dopamine is uniformly dispersed.
Preferably, the impregnation process conditions are as follows: soaking for 1-12h at 25-55 deg.C, and continuously shaking or stirring.
The preparation method of the high heat conduction layer comprises the following steps: mixing high thermal conductivity powder, cool microcapsules and/or phase change microcapsules, a cross-linking agent, an adhesive, a thickening agent and a certain amount of water to prepare high thermal conductivity coating glue, and carrying out single-side silk-screen printing on one side of the hydrophilic modified fabric.
Specifically, the high-thermal-conductivity coating adhesive comprises the following components: 0.1-10 parts of high thermal conductive powder, 1-40 parts of cool microcapsules and/or phase change microcapsules, 1-30 parts of cross-linking agent, 1-20 parts of adhesive, 0.1-10 parts of thickening agent and water to supplement 100 parts;
preferably, the high thermal conductivity powder is any one or a mixture of two of carbon nanotubes, graphene, boron nitride and mica.
Preferably, the cool feeling microcapsule is any one or mixture of essential oil microcapsules taking xylitol and menthol as core materials.
Preferably, the phase-change microcapsule is any one or two of microcapsules taking octadecane and nonadecane as core materials.
Preferably, the cross-linking agent is any one or a mixture of polyurethane and acrylic resin.
Preferably, the adhesive is one or a mixture of two of waterborne polyurethane, waterborne acrylic resin and organic silicon.
Preferably, the thickener is an acrylic acid copolymer.
Preferably, the silk screen is a grid pattern.
The preparation method of the hydrophobic layer comprises the following steps: dissolving the water-based hydrophobic agent in water, adjusting the pH value to 3.5-6.5 by using acid, and uniformly dispersing to obtain a hydrophobic finishing agent; and depositing a hydrophobic layer on one side of the high heat conduction layer far away from the hydrophilic fabric layer by adopting an electrostatic spraying technology, and drying after the hydrophobic layer is formed.
Preferably, the hydrophobic finishing agent is one or a mixture of two of a water-based carbon six waterproof agent and a water-based carbon eight waterproof agent, and the mass concentration of the hydrophobic finishing agent is 0.5-10%.
Preferably, the acid is acetic acid or citric acid or mixture thereof.
Preferably, the electrostatic spraying process is carried out under the conditions of voltage of 5-20kV, perfusion of 0.2-5mL/h, receiving distance of 5-20cm, temperature of 20-30 ℃, humidity of 40-80% and time of 5-60 min.
Preferably, the temperature of the drying treatment is 80-150 ℃.
The invention can be used for sports clothes, surgical gowns and the like, and has the functions of cool contact, moisture conduction, heat conduction and heat dissipation.
Compared with the prior art, the invention has the following effects:
(1) and the single-layer fabric is adopted, so that the thickness of the fabric is reduced, and the ventilation and heat dissipation are increased.
(2) The one-way moisture-guiding function is realized by constructing the wetting gradient in the thickness direction, and the dryness of the skin contact layer is kept.
(3) Carrying out hydrophilic finishing by using dopamine, wherein the fiber forms an outer-parent-inner-hydrophobic structure so that the fiber can guide water but does not retain water; and polydopamine deposited on the outer layer is adhered to the surface of the synthetic fiber, so that the specific surface area for sweat evaporation is increased, and the effect of quickly cooling the external environment by discharging hot moisture is further promoted.
(4) Adopt high heat conduction coating to realize the cool effect of feeling of contact, the latticed high heat conduction coating that the silk screen printing goes out simultaneously can switch on local heat in the face fast along the net, reduces the heat gathering, evenly transmits the heat to hydrophilic fabric layer along surface fabric thickness direction to the big evaporation area on hydrophilic fabric layer further promotes heat and humidity and arranges to the external environment in coordination, reaches quick radiating effect.
Drawings
Fig. 1 is a schematic structural view of the moisture-conducting and heat-dissipating cool fabric of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
Weighing 0.5g of tris (hydroxymethyl) aminomethane, dissolving in deionized water to prepare 100g of solution, stirring until the solution is completely dissolved, and adding diluted hydrochloric acid to adjust the pH value to 8.1; weighing 60mg of dopamine in a buffer solution, and uniformly dispersing; soaking the polyester fabric in dopamine solution for 6h, and shaking in a water bath at 45 ℃; and rinsing and drying for later use after the reaction is finished. Weighing 0.5g of carbon nano tube, 20g of cool microcapsule, 10g of phase change microcapsule, 5g of cross-linking agent, 20g of waterborne polyurethane and 0.3g of thickening agent, adding water to 100g, and stirring at low speed under the condition of normal temperature until the mixture is uniformly dispersed; as shown in fig. 1, one side of the hydrophilic modified fabric is subjected to single-sided silk-screen printing. Dissolving 2g of water-based carbon hexa-waterproofing agent in water, uniformly dispersing, and adjusting the pH value to obtain 100g of hydrophobic finishing agent; depositing a hydrophobic layer on one side of the high heat conduction layer by adopting electrostatic spraying, wherein the voltage is 15kV, the perfusion is 2mL/h, the receiving distance is 10cm, the temperature is 25 ℃, the humidity is 80 percent, the time is 20min, and after the completion, the drying treatment at the temperature of 130 ℃ is carried out.
Example 2
Weighing 3g of tris (hydroxymethyl) aminomethane, dissolving in deionized water to prepare 100g of solution, stirring until the tris (hydroxymethyl) aminomethane is completely dissolved, and adding dilute hydrochloric acid to adjust the pH value to 8.3; weighing 100mg of dopamine in a buffer solution, and uniformly dispersing; soaking the chinlon fabric in a dopamine solution for 2h, and shaking in a water bath at 55 ℃; and rinsing and drying for later use after the reaction is finished. Weighing 0.6g of graphene powder, 10g of cool microcapsules, 10g of phase change microcapsules, 10g of cross-linking agent, 10g of water-based acrylic resin and 0.8g of thickening agent, adding water to prepare 100g of water, and stirring at a low speed under a normal temperature condition until the water is uniformly dispersed; and performing single-side silk-screen printing on one side of the hydrophilic modified fabric. Dissolving 5g of water-based carbon eight waterproofing agent in water, uniformly dispersing, and adjusting the pH value to obtain 100g of hydrophobic finishing agent; depositing a hydrophobic layer on one side of the high heat conduction layer by adopting electrostatic spraying, wherein the voltage is 10kV, the perfusion is 1mL/h, the receiving distance is 15cm, the temperature is 25 ℃, the humidity is 70 percent, the time is 30min, and after the completion, the drying treatment at the temperature of 110 ℃ is carried out.
Example 3
Weighing 5g of tris (hydroxymethyl) aminomethane, dissolving in deionized water to prepare 100g of solution, stirring until the solution is completely dissolved, and adding dilute hydrochloric acid to adjust the pH value to 8.5; weighing 300mg of dopamine in a buffer solution, and uniformly dispersing; soaking the polylactic acid fabric in a dopamine solution for 4 hours, and shaking in a water bath at 45 ℃; and rinsing and drying for later use after the reaction is finished. Weighing 2g of mica stone particles, 20g of cool microcapsules, 20g of phase change microcapsules, 6g of cross-linking agent, 25g of waterborne polyurethane and 1.2g of thickening agent, adding water to 100g, and stirring at a low speed at normal temperature until the mixture is uniformly dispersed; and performing single-side silk-screen printing on one side of the hydrophilic modified fabric. Dissolving 8g of water-based carbon hexa-waterproofing agent in water, uniformly dispersing, and adjusting the pH value to obtain 100g of hydrophobic finishing agent; depositing a hydrophobic layer on one side of the high heat conduction layer by adopting electrostatic spraying, wherein the voltage is 8kV, the perfusion is 3mL/h, the receiving distance is 8cm, the temperature is 30 ℃, the humidity is 75%, the time is 25min, and after the completion, drying treatment at 90 ℃ is carried out.
Comparative example 1 no high thermal conductive layer
Weighing 5g of tris (hydroxymethyl) aminomethane, dissolving in deionized water to prepare 100g of solution, stirring until the solution is completely dissolved, and adding dilute hydrochloric acid to adjust the pH value to 8.5; weighing 300mg of dopamine in a buffer solution, and uniformly dispersing; soaking the polylactic acid fabric in a dopamine solution for 4 hours, and shaking in a water bath at 45 ℃; and rinsing and drying for later use after the reaction is finished. Dissolving 8g of water-based carbon hexa-waterproofing agent in water, uniformly dispersing, and adjusting the pH value to obtain 100g of hydrophobic finishing agent; depositing a hydrophobic layer on one side of the fabric by adopting electrostatic spraying, wherein the voltage is 8kV, the perfusion time is 3mL/h, the receiving distance is 8cm, the temperature is 30 ℃, the humidity is 75 percent, the time is 25min, and after the completion, drying treatment at 90 ℃ is carried out.
Comparing example 3 with comparative example 1, the cool contact coefficient of the fabric prepared with the hydrophilic fabric layer and the hydrophobic layer is obviously lower than that of the example prepared with the high heat conduction layer, and the combination of silk-screen printing and hydrophilic printing on the high heat conduction layer obviously improves the water evaporation rate and promotes heat removal and moisture removal. The mica stone particles in the high heat conduction layer absorb heat on the body surface at the moment of contacting the skin, the phase change microcapsules absorb a large amount of latent heat, and the cool feeling microcapsules continuously stimulate the skin to be cool, so that the three ways cooperate to achieve the cool feeling effect, and the contact cool feeling coefficient is obviously improved; meanwhile, the screen-printed latticed high-heat-conductivity coating conducts local heat in the surface rapidly along the grids, reduces heat accumulation, uniformly transmits the heat to the hydrophilic fabric layer along the thickness direction of the fabric, and further promotes heat and moisture to be discharged to the external environment in cooperation with the large evaporation area of the hydrophilic fabric layer.
Claims (9)
1. The fabric is characterized by sequentially comprising a hydrophilic fabric layer, a high heat conduction layer and a hydrophobic layer from outside to inside, wherein the hydrophilic fabric layer is a fabric modified by polydopamine in a hydrophilic mode, the high heat conduction layer is a high heat conduction coating containing microcapsules, and the hydrophobic layer is a coating finished in a single-side hydrophobic mode.
2. A preparation method of a moisture-conducting heat-dissipating cool fabric is characterized by comprising the following steps:
1) hydrophilic finishing is carried out on the fabric by using a hydrophilic finishing agent to obtain a hydrophilic fabric layer,
2) carrying out silk-screen printing treatment on one side of the hydrophilic fabric layer by using high-thermal-conductivity powder and microcapsule composite mucilage to obtain a high-thermal-conductivity layer,
3) and (3) electrostatically spraying a layer of hydrophobic finishing agent on the other side of the high heat conduction layer far away from the hydrophilic fabric layer to obtain a hydrophobic layer, and finally obtaining the cool fabric with one-way moisture conduction and quick heat dissipation.
3. The preparation method of the moisture-conducting and heat-dissipating cool feeling fabric according to claim 2, wherein in the step 1), dopamine is weighed and added into Tris (hydroxymethyl) aminomethane hydrochloride (Tris-HCl) buffer solution to obtain dopamine solution; and then soaking the base fabric in a dopamine solution, rinsing after the reaction is finished, and drying to obtain the hydrophilic modified fabric.
4. The preparation method of the moisture-conducting heat-dissipating cool fabric according to claim 3, wherein the soaking time is 1-12 hours, the temperature is 25-55 ℃, and the soaking is continuously performed by shaking or stirring.
5. The preparation method of the moisture-conducting heat-dissipating cool fabric according to claim 2, wherein the high thermal conductive powder and microcapsule composite mucilage in step 2) is high thermal conductive coating glue, and is prepared by mixing high thermal conductive powder, cool microcapsules and/or phase change microcapsules, a cross-linking agent, an adhesive, a thickening agent and water, and performing single-sided screen printing on one side of the hydrophilic modified fabric.
6. The preparation method of the moisture-conducting heat-dissipating cool fabric according to claim 5, wherein the high-thermal-conductivity coating adhesive comprises the following components: 0.1-10 parts of high thermal conductive powder, 1-40 parts of cool microcapsules and/or phase change microcapsules, 1-30 parts of cross-linking agent, 1-20 parts of adhesive, 0.1-10 parts of thickening agent and water to supplement 100 parts.
7. The preparation method of the moisture-conducting heat-dissipating cool fabric according to claim 2, wherein in the step 3), the water-based hydrophobic agent is dissolved in water, the pH value is adjusted to 3.5-6.5 by acid, and the water-based hydrophobic agent is uniformly dispersed to obtain a hydrophobic finishing agent; and depositing a hydrophobic layer on one side of the high heat conduction layer far away from the hydrophilic layer by adopting an electrostatic spraying technology, and drying after the hydrophobic layer is formed.
8. The preparation method of the moisture-conducting and heat-dissipating cool feeling fabric according to claim 7, wherein the hydrophobic finishing agent is at least one of a water-based carbon six-water-proofing agent and a water-based carbon eight-water-proofing agent, and the mass concentration of the hydrophobic finishing agent is 0.5-10%.
9. The preparation method of the moisture-conducting heat-dissipating cool fabric according to claim 7, wherein the electrostatic spraying is performed under the process conditions of voltage of 5-20kV, perfusion of 0.2-5mL/h, receiving distance of 5-20cm, temperature of 20-30 ℃, humidity of 40-80% and time of 5-60 min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058785A (en) * | 2022-06-29 | 2022-09-16 | 华中科技大学 | Radiation refrigeration composite fiber and fabric for water collection and preparation method thereof |
| CN115717332A (en) * | 2022-11-23 | 2023-02-28 | 浦江弘丰服饰有限公司 | Multifunctional underwear fabric and preparation method thereof |
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| CN115058785B (en) * | 2022-06-29 | 2024-01-26 | 华中科技大学 | Radiation refrigeration composite fiber and fabric for water collection and preparation method thereof |
| CN115717332A (en) * | 2022-11-23 | 2023-02-28 | 浦江弘丰服饰有限公司 | Multifunctional underwear fabric and preparation method thereof |
| CN115717332B (en) * | 2022-11-23 | 2024-02-23 | 浦江弘丰服饰有限公司 | Multifunctional underwear fabric and preparation method thereof |
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