Multi-layer heat preservation quilt based on heat reflection-heat storage temperature adjusting structure and preparation method of multi-layer heat preservation quilt

Abstract

The invention relates to the field of heat preservation materials and preparation, and particularly discloses a multi-layer heat preservation quilt based on a heat reflection-heat storage temperature adjusting structure. The multi-layer heat preservation quilt based on the heat reflection-heat storage temperature adjusting structure comprises an external heat preservation layer, a heat radiation blocking layer, a moisture absorption temperature adjusting layer and a contact warm feeling layer which are sequentially connected. The external heat preservation layer and the contact warm feeling layer are made of one of flannel, polar fleece, crystal velvet and velvet. The heat radiation blocking layer is an aluminum-coated non-woven fabric layer; the moisture-absorbing and temperature-regulating layer comprises a phase-change material finishing wool layer and a one-way moisture-absorbing layer; in addition, the preparation method has the advantages of being capable of cooperating with the warmth retention property, comfort and convenience of the heat preservation quilt.

Description

Technical Field

[0001] This application relates to the field of thermal insulation materials and their preparation, and more specifically, it relates to a multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure and its preparation method. Background Technology

[0002] In the field of thermal insulation products, the development of insulation technology has a significant impact on people's lives and industrial production. As people's living standards improve, the demand for insulation products is becoming increasingly diversified, requiring not only excellent insulation performance but also improvements in comfort and functionality. In cold environments, effective insulation measures help people resist the cold and protect their health. Furthermore, in some industrial settings, good insulation also helps improve energy efficiency and reduce production costs.

[0003] Currently, most thermal blankets on the market achieve their insulation function using a single material or a simple multi-layered structure. Some traditional thermal blankets use thick cotton materials, utilizing the natural insulating properties of cotton to reduce heat loss; others use down filling, the fluffy structure of which effectively prevents airflow, thus providing insulation; still others use synthetic fiber materials, achieving insulation by trapping air through the gaps between the fibers. These conventional insulation methods can, to a certain extent, meet basic insulation needs.

[0004] However, existing thermal blankets have significant drawbacks. Traditional thermal blankets primarily focus on reducing heat loss through conduction, while neglecting to address heat radiation and the regulation of moisture generated by the body. In actual use, heat radiation leads to substantial heat loss, and if the moisture generated by the body cannot be expelled and regulated in a timely manner, it will make people feel damp and cold, reducing the comfort and insulation effect of the thermal blanket. Summary of the Invention

[0005] To combine the warmth, comfort, and convenience of thermal insulation blankets, this application provides a multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure and its preparation method.

[0006] In a first aspect, this application provides a multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure, employing the following technical solution: A multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure includes an outer thermal insulation layer, a heat radiation barrier layer, a moisture absorption and temperature regulation layer, and a contact warmth layer connected in sequence. The external insulation layer and the contact warmth layer are selected from one of flannel, polar fleece, crystal velvet and velvet; The heat radiation barrier layer is an aluminum-coated non-woven fabric layer. The moisture-absorbing and temperature-regulating layer includes a phase change material-treated wool layer and a one-way moisture-absorbing layer.

[0007] By adopting the above technical solutions, the outer insulation layer and the contact warmth layer are made of one of flannel, fleece, crystal fleece, and velvet. These materials have good softness and warmth retention, which can effectively reduce heat loss through contact with the outside world, providing users with a comfortable touch and initial insulation effect. The heat radiation barrier layer is made of aluminum-coated non-woven fabric. Aluminum has good heat reflection properties, which can reflect the heat radiation emitted by the human body back to the human body, further reducing heat loss to the outside in the form of radiation and enhancing the insulation performance. The moisture-absorbing and temperature-regulating layer includes a phase change material treated wool layer and a one-way moisture-absorbing layer. The phase change material in the phase change material treated wool layer can undergo a phase change when the temperature changes, absorbing or releasing heat, playing a temperature-regulating role and maintaining a relatively stable temperature inside the insulation blanket. The one-way moisture-absorbing layer can conduct the sweat produced by the human body to the outside in one direction, keeping the human skin dry and improving the comfort of use. At the same time, it can conduct moisture to the phase change material treated wool layer, so that the wool absorbs moisture and releases latent heat.

[0008] Preferably, the method for preparing the phase change material-treated wool layer includes the following steps: the phase change material is a phase change microcapsule coated with graphene oxide, the core of the phase change microcapsule is phase change paraffin, the capsule wall of the phase change microcapsule is chitosan, the phase change material is dispersed in water, ultrasonically dispersed, the wool layer is immersed in the water and shaken for 1 hour, then taken out, washed, lightly rolled and dried, and repeated 3 times to obtain the phase change material-treated wool layer.

[0009] By adopting the above technical solution, using chitosan to coat phase change paraffin can reduce the leakage of the paraffin. At the same time, chitosan and graphene oxide can be assembled through electrostatic adsorption. Graphene oxide can improve the stability and thermal conductivity of phase change materials, and can promote more phase change materials to participate in temperature regulation, which is beneficial to improving the thermal insulation performance and temperature regulation capability of thermal insulation blankets.

[0010] Preferably, the preparation method of the phase change microcapsules includes the following steps: adding acetic acid and chitosan to water and mixing evenly to obtain a chitosan solution; adding an emulsifier and mixing evenly, then adding the solution to molten paraffin; stirring and emulsifying to form an emulsion; adding a crosslinking agent; heating and curing for 3-3.5 hours; then allowing it to stand, filtering, washing, and vacuum drying.

[0011] By adopting the above technical solution, a phase change microcapsule with chitosan as the shell material and phase change paraffin as the core material is formed. Its stable physical morphology and structure have good stability and uniformity.

[0012] Preferably, the preparation method of the phase change material includes the following steps: ultrasonically dispersing graphene oxide in water to form a dispersion, adding phase change microcapsules to the dispersion, stirring at a constant temperature of 55-60℃ for 5 hours, filtering, washing, and drying to obtain the phase change material.

[0013] By adopting the above technical solution, graphene oxide is dispersed in water and adsorbed onto the surface of phase change microcapsules using electrostatic interaction. This effectively enhances the thermal conductivity of the phase change microcapsules, improves their response rate, and increases the strength of the phase change material, thus improving its temperature regulation capability.

[0014] Preferably, the method for preparing the unidirectional moisture-absorbing layer includes the following steps: dissolving polyvinylidene fluoride in N,N-dimethylformamide to obtain a base spinning solution; obtaining a base film of the unidirectional moisture-absorbing layer by electrospinning; dissolving polyacrylonitrile in N,N-dimethylformamide to obtain a surface spinning solution; using the base film as a receiving film, obtaining a surface film on the surface of the base film by electrospinning; and thus obtaining the unidirectional moisture-absorbing layer.

[0015] By adopting the above technical solution, the base film obtained by electrospinning has a large specific surface area and rich pore structure, which can effectively improve the moisture absorption capacity. The surface spinning solution is prepared by dissolving polyacrylonitrile in N,N-dimethylformamide, and the surface film with good hydrophilicity is prepared by using the base film as the receiving film. The surface film is formed with the base film to form a one-way moisture-absorbing layer, realizing the one-way transmission of water vapor in the one-way moisture-absorbing layer. When it comes into contact with moisture, the base film can quickly absorb water vapor and transfer the water vapor to the surface film through its internal pore structure. Then, the water vapor evaporates and dissipates through the surface film, thereby keeping the inside of the multi-layer thermal insulation quilt dry and improving the comfort of use. At the same time, it also helps to maintain the thermal insulation performance of the thermal insulation quilt and reduce the phenomenon of reduced thermal insulation effect due to moisture accumulation.

[0016] Preferably, the thickness ratio of the base film to the surface film is (3.12-3.56):(2.21-3.05).

[0017] By adopting the above technical solution and controlling the thickness of the base film and the surface film, a reasonable structural gradient can be formed in the unidirectional moisture-absorbing layer. This facilitates the directional transport of water vapor within the unidirectional moisture-absorbing layer. When water vapor comes into contact with the unidirectional moisture-absorbing layer, the thicker base film provides a larger capacity to absorb and store the water vapor first. Meanwhile, the relatively thin surface film allows water vapor on its surface to dissipate more quickly into the external environment. This enhances the moisture absorption and release capacity of the unidirectional moisture-absorbing layer, thereby increasing its unidirectional water vapor conduction capacity. This helps maintain the dryness and comfort inside the multi-layer thermal insulation quilt, improving the user experience and insulation effect of the quilt.

[0018] Preferably, the concentration of the base spinning solution is 12.65-13.21 wt%, and the concentration of the surface spinning solution is 10.92-11.21 wt%.

[0019] By adopting the above technical solution and controlling the concentration of the base spinning solution and the surface spinning solution, the elasticity and strength of the base film and the surface film can be effectively maintained. At the same time, the unidirectional moisture-absorbing layer obtained by electrospinning has a stepped pore size, which further improves the moisture absorption and unidirectional water vapor transmission capacity of the unidirectional moisture-absorbing layer.

[0020] Preferably, the method for preparing the moisture-absorbing and temperature-regulating layer includes the following steps: stacking a phase change material-treated wool layer and a unidirectional moisture-absorbing layer and hot-pressing them into shape, wherein the phase change material-treated wool layer is bonded to the surface film.

[0021] By adopting the above technical solution, after the phase change material-treated wool layer is bonded to the outer film, the base film can absorb the moisture inside the insulation blanket, keeping the interior space of the insulation blanket dry. At the same time, the moisture is absorbed through the base film, and the outer film, with its good hydrophilicity, can absorb the moisture and come into contact with the phase change material-treated wool layer, realizing the process of absorbing water and releasing latent heat, which can further improve the insulation effect of the insulation blanket.

[0022] Secondly, this application provides a method for preparing a multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure, using the following technical solution: A method for preparing a multi-layer thermal insulation quilt based on a heat reflection-heat storage and temperature regulation structure includes the following steps: hot pressing and shaping the outer thermal insulation layer, the heat radiation barrier layer, the moisture absorption and temperature regulation layer, and the contact warmth layer respectively, and then stacking and sewing them in sequence to produce a multi-layer thermal insulation quilt.

[0023] By adopting the above technical solutions, the outer insulation layer can be made of flannel, fleece, etc., which can effectively block cold air from the outside. The heat radiation barrier layer is an aluminum-coated non-woven fabric layer, which can reflect the heat radiation emitted by the human body and reduce heat loss. The phase change material in the moisture-absorbing and temperature-regulating layer can use the phase change material to absorb and release heat to regulate the temperature. The one-way moisture-absorbing layer can conduct the sweat produced by the human body in one direction to keep the sleeping environment dry, while promoting the wool layer to absorb water and release latent heat, achieving good insulation, temperature regulation and moisture absorption effects, providing users with a comfortable sleeping environment. At the same time, the tight combination of the multi-layer structure also improves the durability and stability of the thermal blanket.

[0024] In summary, this application has the following beneficial effects: 1. Since the external insulation layer and the contact warmth layer in this application are made of one of flannel, fleece, crystal fleece and velvet, the above materials have good softness and warmth retention, which can effectively reduce heat loss through contact with the outside world, providing users with a comfortable touch and initial insulation effect; the heat radiation barrier layer is made of aluminum-coated non-woven fabric layer. Aluminum has good heat reflection properties, which can reflect the heat radiation emitted by the human body back to the human body, further reducing heat loss to the outside in the form of radiation and enhancing the insulation performance; the moisture-absorbing and temperature-regulating layer includes a phase change material treated wool layer and a one-way moisture-absorbing layer. The phase change material in the phase change material treated wool layer can undergo phase change when the temperature changes, absorbing or releasing heat, playing a temperature-regulating role and maintaining the relative stability of the temperature inside the insulation blanket. The one-way moisture-absorbing layer can conduct the sweat produced by the human body to the outside in one direction, keeping the human skin dry and improving the comfort of use. At the same time, it can conduct moisture to the phase change material treated wool layer, so that the wool absorbs moisture and releases latent heat.

[0025] 2. In this application, chitosan is used to coat phase change paraffin, which can reduce the leakage of phase change paraffin. At the same time, chitosan and graphene oxide can be assembled through electrostatic adsorption. Graphene oxide can improve the stability and thermal conductivity of phase change materials, and can promote more phase change materials to participate in temperature regulation, which is beneficial to improving the thermal insulation performance and temperature regulation capability of thermal insulation blankets.

[0026] 3. The base film obtained by electrospinning in this application has a large specific surface area and abundant pore structure, which can effectively improve the moisture absorption capacity. The surface spinning solution is prepared by dissolving polyacrylonitrile in N,N-dimethylformamide, and the surface film with good hydrophilicity is prepared by using the base film as the receiving film. The surface film is formed with the base film to form a one-way moisture-absorbing layer, realizing the one-way transmission of water vapor in the one-way moisture-absorbing layer. When it comes into contact with moisture, the base film can quickly absorb water vapor and transfer the water vapor to the surface film through its internal pore structure. Then, the water vapor is evaporated and dissipated through the surface film, thereby keeping the inside of the multi-layer thermal insulation blanket dry and improving the comfort of use. At the same time, it also helps to maintain the thermal insulation performance of the thermal insulation blanket and reduce the phenomenon of reduced thermal insulation effect due to moisture accumulation. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the embodiments.

[0028] Preparation Examples of Phase Change Materials 1-4 Preparation Example 1 The preparation method of phase change microcapsules includes the following steps: 0.3g acetic acid and 1.2g chitosan are added to 120mL of water and mixed evenly to obtain a chitosan solution. 2mL of emulsifier OP-10 is added and mixed evenly before being added to molten paraffin. The mixture is stirred and emulsified to form an emulsion. The volume ratio of chitosan solution to molten paraffin is 3:1. 0.7mL of crosslinking agent glutaraldehyde is added. After heating and curing for 3.5h, the mixture is allowed to stand, filtered, washed, and vacuum dried.

[0029] The preparation method of phase change material includes the following steps: 0.2g of graphene oxide is ultrasonically dispersed in water to form a dispersion of 2mg / mL, 0.1g of phase change microcapsules are added to the dispersion, and the mixture is stirred at 55℃ for 5h. After filtration, washing and drying, the phase change material is obtained.

[0030] Preparation Example 2 The preparation method of phase change microcapsules includes the following steps: 0.2g acetic acid and 1g chitosan are added to 100mL of water and mixed evenly to obtain a chitosan solution. 1.5mL of emulsifier OP-10 is added and mixed evenly before being added to molten paraffin. The mixture is stirred and emulsified to form an emulsion. The volume ratio of chitosan solution to molten paraffin is 3:1. 0.5mL of crosslinking agent glutaraldehyde is added. After heating and curing for 3h, the mixture is allowed to stand, filtered, washed, and vacuum dried.

[0031] The preparation method of phase change material includes the following steps: 0.3g of graphene oxide is ultrasonically dispersed in water to form a dispersion of 2mg / mL, 0.15g of phase change microcapsules are added to the dispersion, and the mixture is stirred at 60℃ for 5h. After filtration, washing and drying, the phase change material is obtained.

[0032] Preparation Example 3 The difference between Preparation Example 3 and Preparation Example 1 is that in Preparation Example 3, the amount of phase change microcapsules added is 0.05g.

[0033] Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that in Preparation Example 4, the amount of phase change microcapsules added is 0.25g.

[0034] Preparation of unidirectional moisture-absorbing layer Example 5-12 Preparation Example 5 The method for preparing a unidirectional moisture-absorbing layer includes the following steps: dissolving polyvinylidene fluoride in N,N-dimethylformamide to obtain a base spinning solution with a concentration of 12.65 wt%; obtaining a base film for the unidirectional moisture-absorbing layer by electrospinning; dissolving polyacrylonitrile in N,N-dimethylformamide to obtain a surface spinning solution with a concentration of 10.92 wt%; using the base film as a receiving film, obtaining a surface film on the surface of the base film by electrospinning to obtain a unidirectional moisture-absorbing layer; the electrospinning voltage is 25 kV, the spinning rate is 1 mL / h, the receiving distance is 20 cm, and the thickness ratio of the base film to the surface film is 3.12:2.21.

[0035] Preparation Example 6 The method for preparing a unidirectional moisture-absorbing layer includes the following steps: dissolving polyvinylidene fluoride in N,N-dimethylformamide to obtain a base spinning solution with a concentration of 13.21 wt%; obtaining a base film for the unidirectional moisture-absorbing layer by electrospinning; dissolving polyacrylonitrile in N,N-dimethylformamide to obtain a surface spinning solution with a concentration of 11.21 wt%; using the base film as a receiving film, obtaining a surface film on the surface of the base film by electrospinning to obtain a unidirectional moisture-absorbing layer; the electrospinning voltage is 25 kV, the spinning rate is 0.8 mL / h, the receiving distance is 18 cm, and the thickness ratio of the base film to the surface film is 3.56:3.05.

[0036] Preparation Example 7 The difference between Preparation Example 7 and Preparation Example 5 is that in Preparation Example 7, the concentration of the base spinning solution is 8.15 wt%.

[0037] Preparation Example 8 The difference between Preparation Example 8 and Preparation Example 5 is that in Preparation Example 8, the concentration of the base spinning solution is 18.21 wt%.

[0038] Preparation Example 9 The difference between Preparation Example 9 and Preparation Example 5 is that in Preparation Example 9, the concentration of the surface spinning solution is 6.10 wt%.

[0039] Preparation Example 10 The difference between Preparation Example 10 and Preparation Example 5 is that in Preparation Example 10, the concentration of the surface spinning solution is 17.21 wt%.

[0040] Preparation Example 11 The difference between Preparation Example 11 and Preparation Example 5 is that in Preparation Example 11, the thickness ratio of the base film to the surface film is 3.12:1.15.

[0041] Preparation Example 12 The difference between Preparation Example 12 and Preparation Example 5 is that in Preparation Example 12, the thickness ratio of the base film to the surface film is 3.12:3.68. Example

[0042] Example 1 A multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure includes an outer thermal insulation layer, a heat radiation barrier layer, a moisture absorption and temperature regulation layer, and a contact warmth layer connected in sequence. The external insulation layer is made of flannel; The warm-feeling layer is made of fleece; The heat radiation barrier layer is an aluminum-coated non-woven fabric layer; The humidity-regulating layer consists of a phase change material-finished wool layer and a one-way moisture-absorbing layer; The preparation method of the phase change material-finished wool layer includes the following steps: dispersing the phase change material in water, ultrasonically dispersing it to form a 2 mg / L dispersion, immersing the wool layer in the dispersion at a bath ratio of 1:40 and shaking it for 1 hour, then taking it out to clean, lightly rolling it and drying it. After repeating this process 3 times, the phase change material-finished wool layer is obtained. The phase change material is the one prepared in Preparation Example 1, and the unidirectional moisture-absorbing layer is the one prepared in Preparation Example 5.

[0043] The above-mentioned method for preparing a multi-layer thermal insulation quilt with a heat reflection-heat storage and temperature regulation structure includes the following steps: hot pressing and shaping the outer thermal insulation layer, the heat radiation barrier layer, the moisture absorption and temperature regulation layer and the contact warmth layer respectively, and then stacking and sewing them in sequence to produce a multi-layer thermal insulation quilt.

[0044] Example 2 A multi-layer thermal insulation blanket based on a heat reflection-heat storage and temperature regulation structure includes an outer thermal insulation layer, a heat radiation barrier layer, a moisture absorption and temperature regulation layer, and a contact warmth layer connected in sequence. The external insulation layer is made of crystal velvet; Velvet is used for the warm-feeling layer; The heat radiation barrier layer is an aluminum-coated non-woven fabric layer; The humidity-regulating layer consists of a phase change material-finished wool layer and a one-way moisture-absorbing layer; The preparation method of the phase change material-finished wool layer includes the following steps: dispersing the phase change material in water, ultrasonically dispersing it to form a 2.5 mg / L dispersion, immersing the wool layer in the dispersion at a bath ratio of 1:35 and shaking for 1 hour, then taking it out, washing it, lightly rolling it, and drying it. After repeating this process 3 times, the phase change material-finished wool layer is obtained. The phase change material used is the phase change material prepared in Preparation Example 2, and the unidirectional moisture-absorbing layer is the unidirectional moisture-absorbing layer prepared in Preparation Example 6.

[0045] The above-mentioned method for preparing a multi-layer thermal insulation quilt with a heat reflection-heat storage and temperature regulation structure includes the following steps: hot pressing and shaping the outer thermal insulation layer, the heat radiation barrier layer, the moisture absorption and temperature regulation layer and the contact warmth layer respectively, and then stacking and sewing them in sequence to produce a multi-layer thermal insulation quilt.

[0046] Example 3 The difference between Example 3 and Example 1 is that in Example 3, the phase change material used is the phase change material prepared in Preparation Example 3.

[0047] Example 4 The difference between Example 4 and Example 1 is that in Example 4, the phase change material used is the phase change material prepared in Preparation Example 4.

[0048] Example 5 The difference between Example 5 and Example 1 is that in Example 5, the phase change material used is the unidirectional moisture-absorbing layer prepared in Preparation Example 7.

[0049] Example 6 The difference between Example 6 and Example 1 is that in Example 6, the phase change material used is the unidirectional moisture-absorbing layer prepared in Preparation Example 8.

[0050] Example 7 The difference between Example 7 and Example 1 is that in Example 7, the unidirectional moisture-absorbing layer is the same as that prepared in Example 9.

[0051] Example 8 The difference between Example 8 and Example 1 is that in Example 8, the unidirectional moisture-absorbing layer is the unidirectional moisture-absorbing layer prepared in Preparation Example 10.

[0052] Example 9 The difference between Example 9 and Example 1 is that in Example 9, the unidirectional moisture-absorbing layer is the same as that prepared in Example 11.

[0053] Example 10 The difference between Example 10 and Example 1 is that in Example 10, the unidirectional moisture-absorbing layer is the unidirectional moisture-absorbing layer prepared in Preparation Example 12.

[0054] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, a phase change material is used to treat the wool layer instead of the moisture-absorbing and temperature-regulating layer.

[0055] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that in Comparative Example 2, a unidirectional moisture-absorbing layer is used instead of a moisture-absorbing and temperature-regulating layer.

[0056] Performance testing Multilayer thermal insulation blankets were prepared according to Examples 1-10 and Comparative Examples 1-2, and their static thermal resistance and moisture resistance were tested. The test method refers to GB / T 11048-2018 Determination of thermal resistance and moisture resistance of textiles under steady-state conditions for physiological comfort (evaporative hot plate method).

[0057] Table 1 Thermal Insulation Performance Test of Multi-Layer Thermal Insulation Blankets As can be seen from Table 1, Examples 1-2, and Comparative Examples 1-2, the multi-layer thermal insulation blankets prepared in Examples 1-2 have high thermal resistance and low moisture resistance, indicating that they have good thermal insulation performance and good moisture permeability. While keeping warm, they can dissipate moisture inside the blanket, maintaining a low humidity inside the blanket, keeping the skin dry, and improving the comfort of use. The materials used in the outer insulation layer and the contact warming layer have good softness and warmth retention, which can reduce heat loss and provide a comfortable touch. The heat radiation blocking layer can reflect heat radiation, so that the heat emitted by the human body can be retained inside the blanket. The phase change material of the moisture-absorbing and temperature-regulating layer can undergo phase change when the temperature changes, absorbing or releasing heat, maintaining a relatively stable internal temperature of the blanket. The one-way moisture-absorbing layer can promote the diffusion of moisture inside the blanket outward, keeping it dry and improving comfort, so that the user does not feel stuffy when using the blanket.

[0058] Comparative Example 1 has a high moisture resistance because it does not use a one-way moisture-absorbing layer, thus lacking the active moisture-wicking function of the one-way moisture-absorbing layer. After the wool layer absorbs moisture, the moisture accumulates and cannot be quickly discharged, resulting in a serious decrease in overall breathability. Comparative Example 2 has a lower moisture resistance, but its thermal resistance is significantly lower. Comparative Example 2 does not use phase change material to treat the wool layer, indicating that phase change material treatment plays a key role in heat storage and temperature regulation and improving overall thermal insulation performance. Its absence leads to a decrease in the thermal insulation performance of the quilt.

[0059] Compared with Examples 1-2, Examples 3-4 show a decrease in thermal resistance. In Examples 3-4, the amount of phase change microcapsules added to the graphene oxide dispersion was changed during the preparation of the phase change material. In Example 3, the amount added was too small, resulting in insufficient loading of the phase change material and weakening of its temperature regulation and heat storage capacity. In Example 4, the amount added was too large, which easily led to microcapsule aggregation or uneven distribution, affecting its effective working area and heat conduction efficiency, thus reducing the overall thermal resistance performance.

[0060] Compared with Examples 1-2, Examples 5-8 show improved moisture resistance. In the preparation of the unidirectional moisture-absorbing layer used in Examples 5-8, the concentrations of the base spinning solution and the surface spinning solution were changed respectively. In Example 5, the base spinning solution concentration was too low, easily resulting in a loose base film structure, insufficient strength, and excessively large pores, leading to a decrease in the capillary pressure difference for unidirectional moisture conduction and a reduction in moisture conduction capacity. In Example 6, the base spinning solution concentration was too high, resulting in excessively coarse fibers and an overly dense film, increasing the resistance to water vapor transmission and thus raising the moisture resistance. In Example 7, the surface spinning solution concentration was too low, leading to a discontinuous surface film structure, poor hydrophilicity and mechanical strength, incomplete moisture conduction channels, and a decrease in the ability to pull water vapor. In Example 8, the surface spinning solution concentration was too high, resulting in an overly dense and thick surface film, significantly increasing the resistance to water vapor evaporation and hindering the dissipation of moisture into the environment.

[0061] Compared with Examples 1-2, Examples 9-10 show improved moisture resistance. In Examples 9-10, the thickness ratio of the base film to the surface film was changed during the preparation of the unidirectional moisture-absorbing layer. The surface film in Example 9 was too thin, which affected the wetting gradient balance between the base film and the hydrophobic base film, affecting the continuous transport and evaporation of moisture and reducing the water vapor pulling performance. The surface film in Example 10 was too thick, which increased the diffusion path and resistance of water vapor penetrating the surface film, thus increasing the difficulty of water vapor dissipation and increasing the moisture resistance of the multilayer insulation blanket.

[0062] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A multi-layer thermal blanket based on a heat-reflecting and heat-storing temperature regulating structure, characterized in that: The heat insulation quilt comprises an outer heat insulation layer, a heat radiation barrier layer, a moisture absorption and temperature adjusting layer and a contact warm layer connected in sequence. The outer heat insulation layer and the contact warm layer are selected from one of flannel, shaggy, crystal wool and velvet. The heat radiation barrier layer is an aluminum-coated non-woven fabric layer. The moisture absorption and temperature adjusting layer comprises a phase change material finished wool layer and a one-way moisture absorption layer.

2. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 1, characterized in that: The preparation method of the phase change material finished wool layer comprises the following steps: the phase change material is graphene oxide coated phase change microcapsules, the core of the phase change microcapsules is phase change paraffin, and the wall of the phase change microcapsules is chitosan; the phase change material is dispersed in water, and after ultrasonic dispersion, the wool layer is immersed, shaken for 1 hour, taken out, washed, lightly rolled and dried; the process is repeated three times to obtain the phase change material finished wool layer.

3. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 2, characterized in that: The preparation method of the phase change microcapsules comprises the following steps: acetic acid and chitosan are added to water and mixed uniformly to obtain a chitosan solution; an emulsifier is added and mixed uniformly, and then added to molten paraffin; the mixture is stirred and emulsified to form an emulsion; a crosslinking agent is added, and the mixture is heated and solidified for 3-3.5 hours; and the mixture is then placed, filtered, washed and vacuum dried.

4. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 2, characterized in that: The preparation method of the phase change material comprises the following steps: graphene oxide is ultrasonically dispersed in water to form a dispersion liquid; the phase change microcapsules are added to the dispersion liquid; the mixture is stirred at a constant temperature of 55-60°C for 5 hours; and the mixture is then filtered, washed and dried to obtain the phase change material.

5. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 1, characterized in that: The preparation method of the one-way moisture absorption layer comprises the following steps: polyvinylidene fluoride is dissolved in N,N-dimethylformamide to prepare a base layer spinning solution; a base film of the one-way moisture absorption layer is obtained by electrospinning; polyacrylonitrile is dissolved in N,N-dimethylformamide to prepare a surface layer spinning solution; a surface film is prepared on the surface of the base film by electrospinning with the base film as a receiving film; and the one-way moisture absorption layer is prepared.

6. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 5, characterized in that: The thickness ratio of the base film to the surface film is (3.12-3.56):(2.21-3.05).

7. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 5, characterized in that: The concentration of the base layer spinning solution is 12.95-13.65 wt%, and the concentration of the surface layer spinning solution is 11.65-12.51 wt%.

8. The multi-layer thermal insulation blanket based on the heat-reflecting and heat-storing temperature regulating structure according to claim 5, characterized in that: The preparation method of the moisture absorption and temperature adjusting layer comprises the following steps: the phase change material finished wool layer and the one-way moisture absorption layer are stacked and hot-pressed to form a shape.

9. The preparation method of the multi-layer thermal insulation quilt based on the heat reflection-heat storage temperature adjustment structure according to any one of claims 1-8, characterized in that: The method comprises the following steps: The outer heat insulation layer, the heat radiation barrier layer, the moisture absorption and temperature adjusting layer and the contact warm layer are respectively hot-pressed to be shaped, and then are sequentially stacked and sewn to prepare a multi-layer heat insulation quilt.

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