A breathable film material for down jackets and a preparation method thereof

Abstract

The present application relates to the technical field of film-coated fabric manufacturing, and particularly relates to a breathable film-coated material for down jackets and a preparation method thereof. The breathable film-coated material is composed of an outer layer, an intermediate film-coated layer and an inner layer. The outer layer is nylon, the intermediate film-coated layer includes a fullerene-castor oil modified epoxy resin composite material, a nano-silica-graphene modified chitosan composite material and a liquid nitrile rubber, and the inner layer is a polyester mesh cloth. The spherical structure of fullerene and the two-dimensional sheet structure of graphene form spatial complementation, and the nano-silica acts as a molecular pillar, thereby constructing a gradient distribution of microporous and mesoporous systems. The balanced distribution of hydrophobic long-chain groups and hydrophilic functional groups in the material forms a selective transport channel, realizes the blocking of water molecule clusters and the directional transmission of water vapor molecules. The multi-level closed pore structure and the thermal conduction characteristics of each component synergistically enhance the warmth-keeping effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of film-coated fabric manufacturing, and particularly to a breathable film-coated material for down jackets and a preparation method thereof. BACKGROUND

[0002] At present, the breathable film-coated material for down jackets is widely used in the field of functional clothing, and its development has experienced an evolution process from single function to multi-functional composite. Traditional film-coated materials mainly use polyurethane (PU) or polytetrafluoroethylene (PTFE) and other high molecular materials, which have good waterproof performance, but the breathability often cannot meet the wearing requirements. Especially when the environmental temperature changes greatly, if the breathability of the fabric is insufficient, the water vapor cannot be discharged in time, and a humid environment is formed inside the clothing, which seriously affects the wearing comfort.

[0003] The balance between breathability and waterproofness is the main technical problem faced by the film-coated material. Improving breathability usually requires increasing the porosity of the material or improving its hydrophilicity, but this often reduces the waterproof effect of the material. The microporous breathable technology currently used on the market has realized the combination of breathability and waterproofness to some extent, but its performance stability still needs to be improved. Especially after being washed for many times or used for a long time, the microporous structure is easy to be blocked or deformed, resulting in a decrease in breathability. In addition, the performance of traditional film-coated materials under different temperature and humidity environments differs greatly, and it is difficult to meet the all-weather use requirements.

[0004] The stability of the warmth-keeping effect is another important problem. The warmth-keeping property of a down jacket mainly depends on the loftiness of the down, and the performance of the film-coated material directly affects the loftiness of the down. The current film-coated material is prone to a decrease in breathability after being wet, which not only affects the loftiness of the down, but also reduces its warmth-keeping effect. At the same time, the thermal conductivity coefficient of traditional film-coated materials is high, and a cold bridge effect is easy to be formed in a cold environment, affecting the overall warmth-keeping performance. In addition, the structural stability of existing film-coated materials is easy to be destroyed after repeated compression and stretching, resulting in gradual degradation of the functional performance. SUMMARY

[0005] (1) Technical problem to be solved

[0006] The purpose of the present application is to provide a breathable film-coated material for down jackets and a preparation method thereof, which solves the balance between breathability and waterproofness of the existing breathable film-coated material for down jackets and enhances the warmth-keeping effect.

[0007] (2) Technical scheme

[0008] In order to achieve the above-mentioned purpose, on the one hand, the application provides a breathable film material for down jackets, which is composed of an outer layer, an intermediate film layer and an inner layer, the outer layer is nylon, the intermediate film layer comprises fullerene-castor oil modified epoxy resin composite, nano-silicon dioxide-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0009] Further, the outer layer comprises the following raw materials in parts by weight: 15-25 parts of nylon; the intermediate film layer comprises the following raw materials in parts by weight: 30-40 parts of fullerene-castor oil modified epoxy resin composite, 20-30 parts of nano-silicon dioxide-graphene modified chitosan composite and 1-3 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 15-25 parts of polyester mesh cloth.

[0010] Further, the preparation method of the fullerene-castor oil modified epoxy resin composite comprises:

[0011] S11. Fullerene-C 60 is added into tetrahydrofuran, and ultrasonic treatment is performed for 30-40 min to obtain a pretreated fullerene-C 60 solution;

[0012] S12. Castor oil is added into epoxy resin, and then stirring is performed at a temperature of 80-90 DEG C and a rotating speed of 200-300 rpm for 2-3 h to obtain castor oil modified epoxy resin;

[0013] S13. The pretreated fullerene-C 60 solution is slowly added into the castor oil modified epoxy resin, and then stirring is performed for 30-40 min to obtain a stirred mixture, the stirred mixture is subjected to ultrasonic treatment for 15-30 min to obtain an ultrasonic treated mixture, the ultrasonic treated mixture is vacuum degassed for 20-30 min to obtain a vacuum degassed mixture, and methyltetrahydrophthalic anhydride is added into the vacuum degassed mixture to obtain a mixture;

[0014] S14. Polydimethylxylene glycol is applied on the surface of a mold to obtain a pretreated mold, the mixture is poured into the pretreated mold to perform step-by-step curing, first, the mixture is kept at 80-90 DEG C for 2-3 h, then the mixture is kept at 120-130 DEG C for 2-3 h, and finally, the mixture is cured at 150-160 DEG C for 2-3 h to obtain a cured product, and the cured product is cooled to room temperature to obtain a fullerene-castor oil modified epoxy resin composite.

[0015] Further, the preparation method of the nano-silicon dioxide-graphene modified chitosan composite comprises:

[0016] S21. Graphene oxide is added into deionized water, and then ultrasonic treatment is performed for 50-60 min to obtain a graphene oxide dispersion liquid;

[0017] S22. Add chitosan to 2-5wt% acetic acid solution, then stir at 300-400rpm for 4-5h to obtain chitosan solution;

[0018] S23. Vacuum dry nano-silicon dioxide at 80-90℃ for 4-5h to obtain pretreated nano-silicon dioxide, add 3-aminopropyl triethoxysilane to the pretreated nano-silicon dioxide, then react at 80-90℃ for 2-3h to obtain reacted nano-silicon dioxide, centrifuge the reacted nano-silicon dioxide at 8000-9000rpm for 10-20min to obtain centrifuged nano-silicon dioxide, wash the centrifuged nano-silicon dioxide with ethanol for 3-4 times to obtain washed nano-silicon dioxide, and dry the washed nano-silicon dioxide at 60-70℃ for 12-18h to obtain surface modified nano-silicon dioxide;

[0019] S24. Add the surface modified nano-silicon dioxide to the graphene oxide dispersion solution, then ultrasonic for 30-40min to obtain a mixed dispersion solution, slowly drop the mixed dispersion solution into the chitosan solution, then stir at 300-400rpm for 2-3h to obtain solution A, ultrasonic the solution A for 30-40min to obtain solution B, add glutaraldehyde solution to the solution B to obtain solution C, stir the solution C for 30-40min to obtain solution D;

[0020] S25. Pour the solution D into a polytetrafluoroethylene mold, then stand at room temperature for 12-24h to obtain product A, dry the product A in an oven at 50-60℃ for 24-36h to obtain product B, soak the product B in deionized water for 24-36h to obtain product C, and vacuum dry the product C at 50-60℃ for 12-24h to obtain nano-silicon dioxide-graphene modified chitosan composite material.

[0021] In another aspect, based on the same inventive concept, the application further provides a preparation method of the breathable film material for down jackets, which is applied to the breathable film material for down jackets and comprises the following steps:

[0022] S31. Dry the nylon fabric at 60-70℃ for 30-40min to obtain dried nylon fabric, and naturally cool the dried nylon fabric to room temperature to obtain an outer layer material;

[0023] S32. Mix and stir the fullerene-castor oil modified epoxy resin composite material, nano-silicon dioxide-graphene modified chitosan composite material and liquid nitrile rubber for 30-40min, then vacuum degas for 15-20min to obtain an intermediate film layer;

[0024] S33. The intermediate film layer is uniformly coated on the outer layer material with a coating thickness of 0.2-0.3 mm to obtain a coated layer, and a polyester mesh fabric inner layer is covered on the coated layer to obtain a preliminary film-coated material, the preliminary film-coated material is hot-pressed and compounded at 130-140 DEG C and 0.5-0.8 MPa for 60-90 s to obtain a secondary film-coated material, the secondary film-coated material is cold-pressed and shaped at 0.5-0.6 MPa for 30-40 s to obtain a tertiary film-coated material, and the tertiary film-coated material is naturally air-dried for 24-48 h to obtain the breathable film-coated material for down jackets.

[0025] The mechanism of the above raw material components is as follows:

[0026] Nylon: As the main material of the outer layer, it has excellent mechanical strength and wear resistance, and also has certain moisture absorption and air permeability, which can provide good physical support and basic functional performance for the entire composite material.

[0027] Fullerene-castor oil modified epoxy resin composite material: The cage structure of fullerene can undergo ring-opening addition reaction with the hydroxyl groups in the castor oil molecules to form macromolecules with a three-dimensional network structure, while the long-chain fatty acid groups in the castor oil molecules impart good flexibility and hydrophobic properties to the material, and the epoxy resin matrix undergoes crosslinking reaction with the network structure formed by fullerene and castor oil through its epoxy groups, providing excellent mechanical properties and structural stability.

[0028] Nano-silicon dioxide-graphene modified chitosan composite material: The silicon hydroxyl groups on the surface of nano-sized silicon dioxide particles can form a multiple hydrogen bond network with the amino and hydroxyl groups in the chitosan molecules, while the sheet structure of graphene can not only form strong interactions with the chitosan macromolecular chains through π-π stacking and chemical bonding, but also significantly improve the mechanical properties and thermal conductivity of the composite material.

[0029] Liquid nitrile rubber: It plays a toughening and bonding role in the intermediate film layer, its good elasticity and flexibility can improve the mechanical properties and durability of the composite material, and its polar groups in the molecular chain can form an interface structure with good compatibility with other components, enhancing the interlayer bonding force

[0030] Polyester mesh fabric: As the inner layer material, its mesh structure provides a large number of small air layers, which can effectively block heat transfer, and the mesh structure can also form capillary channels to promote the rapid diffusion and transmission of water, which is beneficial to improve the air permeability and sweat-wicking performance of the material, and the excellent shape retention and dimensional stability of polyester ensure that this mesh structure remains stable during use.

[0031] (3) Beneficial effects

[0032] Compared with the prior art, the beneficial effects of the present application are:

[0033] 1. By the composite structure of fullerene-castor oil modified epoxy resin and nano-silica-graphene modified chitosan, a gradient distribution of microporous and mesoporous system is formed. The regular and alternating distribution of hydrophobic and hydrophilic regions can effectively block water molecule aggregates and allow single water vapor molecules to pass through, improving the water-proof and breathable performance.

[0034] 2. By using the reversible change characteristics of the hydroxyl and amino groups on the chitosan molecular chain under different humidity environments, combined with the basic waterproof barrier provided by the epoxy resin network, a system that can automatically adjust the pore size according to the environmental humidity is formed, realizing the dynamic balance of breathability and waterproofness.

[0035] 3. By the isotropic thermal conductivity of fullerene, the anisotropic thermal conductivity of graphene, and the static air layer formed by the multi-level closed pores, the warmth-keeping performance of the material is significantly improved, while maintaining good water-proof and breathable performance. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The actual picture of the breathable film material for the down jacket of Example 1 of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The test equipment and preparations of the following described embodiments are as follows:

[0039] Electronic balance (Germany Sartorius), electric heating air blowing constant temperature dryer (Shanghai Fuma Experimental Equipment), electric heating constant temperature water bath (Jiangsu Kedaoyu), magnetic stirrer (Shanghai Meiyinqiu), ultrasonic cleaner (Shanghai Bilang), vacuum defoaming machine (Shenzhen Yingtai), centrifuge (Hunan Kaida), vacuum oven (Chengdu Henglutong), sprayer (Taizhou Huangyan), coating machine (Wuxi Aiwangsi), hot press (Hebei Qianhui), cold press (Qingdao Guangyu); chemical drugs and reagents were purchased from Sigma-Aldrich Company.

[0040] Example 1: The breathable film material for down jackets disclosed in this embodiment is composed of an outer layer, a middle film layer and an inner layer. The outer layer is nylon, the middle film layer includes fullerene-castor oil modified epoxy resin composite material, nano-silica-graphene modified chitosan composite material and liquid nitrile rubber, and the inner layer is polyester mesh fabric.

[0041] The outer layer comprises the following raw materials by weight: nylon 18 parts; the intermediate coating layer comprises the following raw materials by weight: fullerene-castor oil modified epoxy resin composite 32 parts, nano-silica-graphene modified chitosan composite 26 parts, liquid nitrile rubber 2 parts; the inner layer comprises the following raw materials by weight: polyester mesh cloth 18 parts.

[0042] In the design of the breathable film material of the down jacket, the spherical structure of fullerene in the fullerene-castor oil modified epoxy resin composite and the two-dimensional sheet structure of graphene in the nano-silica-graphene modified chitosan composite form spatial complementation, and the nano-silica particles act as "molecular pillars" between the layers. The smaller pores come from the intermolecular gaps of graphene, and the larger pores come from the gaps formed by nano-silica support, which can form a gradient distribution of microporous and mesoporous systems. At the same time, the hydrophobic long-chain groups in the castor oil molecules and the hydrophilic functional groups in the chitosan molecules achieve an amphiphilic balance, forming a micro-porous transport channel with directionality and selectivity. This directionality and selectivity is derived from the formation of a channel structure with alternating distribution of hydrophobic and hydrophilic regions at the microscale during material formation. This regular amphiphilic distribution not only provides a preferential path for water molecules, but also affects the size of the channel.

[0043] This composite system realizes effective blocking of water molecule clusters and directional transport of water vapor molecules by adjusting the micropore size distribution to be between the size of water molecule clusters and individual water vapor molecules, and coordinating the spatial distribution of hydrophobic and hydrophilic regions in the material. At the same time, the combination of the basic waterproof barrier provided by the epoxy resin network and the reversible pore size change characteristics of the chitosan layer under different environmental humidity, which is derived from the significant hygroscopicity of the hydroxyl and amino groups on the chitosan molecular chain, the hydrophilic groups will absorb water molecules when the environmental humidity increases, causing the molecular chain to swell and increase the intermolecular distance, and when the humidity decreases, the molecular chain will shrink, forming an intelligent dynamic adjustment system, ensuring the optimal balance between breathability and waterproofness.

[0044] More importantly, due to the existence of a large number of closed pores in the multi-level pore structure system, the gas wrapped in the material cannot flow to form a stable static gas layer. In addition, the fullerene has isotropic thermal conductivity, and the graphene has extremely high thermal conductivity in the plane direction and lower thermal conductivity in the vertical direction, which can realize directional heat transfer. Moreover, the multi-level structure and different thermal conductivity of each component in the material can hinder and regulate heat transfer, and the heat transfer gradually slows down from the outside to the inside, forming a temperature gradient. These factors together establish a heat management system, improve the warmth retention performance of the material, and ultimately realize a high-performance coating material system with the functions of air permeability, waterproofness and warmth retention. Figure 1

[0045] The preparation method of the fullerene-castor oil modified epoxy resin composite material comprises the following steps:

[0046] S11. Fullerene-C 60 is added to tetrahydrofuran, and ultrasonic treatment is performed for 30-40 min to obtain a pretreated fullerene-C 60 solution;

[0047] S12. Castor oil is added to the epoxy resin, and then stirring is performed at a temperature of 80-90°C and a rotation speed of 200-300 rpm for 2-3 h to obtain a castor oil modified epoxy resin;

[0048] S13. The pretreated fullerene-C 60 solution is slowly added to the castor oil modified epoxy resin, and then stirring is performed for 30-40 min to obtain a stirred mixture. The stirred mixture is subjected to ultrasonic treatment for 15-30 min to obtain an ultrasonically treated mixture. The ultrasonically treated mixture is subjected to vacuum degassing for 20-30 min to obtain a vacuum degassed mixture. Methyltetrahydrophthalic anhydride is added to the vacuum degassed mixture to obtain a mixture;

[0049] S14. Polydimethylxylene glycol is applied to the surface of a mold to obtain a pretreated mold. The mixture is poured into the pretreated mold and subjected to step-by-step curing. First, the mixture is subjected to heat preservation at 80-90°C for 2-3 h, then the mixture is subjected to heat preservation at 120-130°C for 2-3 h, and finally the mixture is cured at 150-160°C for 2-3 h to obtain a cured product. The cured product is cooled to room temperature to obtain a fullerene-castor oil modified epoxy resin composite material.

[0050] The preparation method of the nanosilica-graphene modified chitosan composite material comprises the following steps:

[0051] S21. Graphene oxide is added to deionized water, and then ultrasonic treatment is performed for 50-60 min to obtain a graphene oxide dispersion;

[0052] ​S22. The chitosan is added into 2-5wt% acetic acid solution, and then stirred at 300-400rpm for 4-5h to obtain a chitosan solution;

[0053] S23. The nanosilica is vacuum dried at 80-90℃ for 4-5h to obtain pretreated nanosilica, 3-aminopropyl triethoxysilane is added into the pretreated nanosilica, and then reacted at 80-90℃ for 2-3h to obtain reacted nanosilica, the reacted nanosilica is centrifuged at 8000-9000rpm for 10-20min to obtain centrifuged nanosilica, the centrifuged nanosilica is washed with ethanol for 3-4 times to obtain washed nanosilica, and the washed nanosilica is dried at 60-70℃ for 12-18h to obtain surface modified nanosilica;

[0054] S24. The surface modified nanosilica is added into the graphene oxide dispersion solution, and then ultrasonically treated for 30-40min to obtain a mixed dispersion solution, the mixed dispersion solution is slowly dropped into the chitosan solution, and then stirred at 300-400rpm for 2-3h to obtain solution A, the solution A is ultrasonically treated for 30-40min to obtain solution B, the glutaraldehyde solution is added into the solution B to obtain solution C, and the solution C is stirred for 30-40min to obtain solution D;

[0055] S25. The solution D is poured into a polytetrafluoroethylene mold, and then left at room temperature for 12-24h to obtain product A, the product A is oven dried at 50-60℃ for 24-36h to obtain product B, the product B is soaked in deionized water for 24-36h to obtain product C, and the product C is vacuum dried at 50-60℃ for 12-24h to obtain nanosilica-graphene modified chitosan composite material.

[0056] The application relates to a preparation method of a breathable film material for a down jacket.

[0057] S31. The nylon fabric is oven dried at 60-70℃ for 30-40min to obtain oven dried nylon fabric, and the oven dried nylon fabric is naturally cooled to room temperature to obtain an outer layer material;

[0058] S32. The fullerene-castor oil modified epoxy resin composite material, the nanosilica-graphene modified chitosan composite material and the liquid butadiene-acrylonitrile rubber are mixed and stirred for 30-40min, and then vacuum degassed for 15-20min to obtain an intermediate film layer;

[0059] S33. The intermediate film layer is evenly coated on the outer layer material with a coating thickness of 0.2-0.3 mm to obtain a coated layer, and a polyester mesh cloth inner layer is covered on the coated layer to obtain a preliminary film material, and the preliminary film material is hot-pressed and compounded at 130-140℃ and 0.5-0.8 MPa for 60-90s to obtain a secondary film material, and the secondary film material is cold-pressed and shaped at 0.5-0.6 MPa for 30-40s to obtain a tertiary film material, and the tertiary film material is naturally air-dried for 24-48h to obtain the breathable film material for down jackets.

[0060] Example 2: The breathable film material for down jackets disclosed in this example is composed of an outer layer, an intermediate film layer and an inner layer, the outer layer is nylon, the intermediate film layer comprises fullerene-castor oil modified epoxy resin composite, nano-silicon dioxide-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0061] The outer layer comprises the following raw materials by weight: 25 parts of nylon; the intermediate film layer comprises the following raw materials by weight: 40 parts of fullerene-castor oil modified epoxy resin composite, 30 parts of nano-silicon dioxide-graphene modified chitosan composite and 3 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials by weight: 25 parts of polyester mesh cloth.

[0062] The preparation method of the fullerene-castor oil modified epoxy resin composite and the nano-silicon dioxide-graphene modified chitosan composite in this example is consistent with that in Example 1. The preparation method of the breathable film material for down jackets in this example is consistent with that in Example 1.

[0063] Example 3: The breathable film material for down jackets disclosed in this example is composed of an outer layer, an intermediate film layer and an inner layer, the outer layer is nylon, the intermediate film layer comprises fullerene-castor oil modified epoxy resin composite, nano-silicon dioxide-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0064] The outer layer comprises the following raw materials by weight: 15 parts of nylon; the intermediate film layer comprises the following raw materials by weight: 30 parts of fullerene-castor oil modified epoxy resin composite, 20 parts of nano-silicon dioxide-graphene modified chitosan composite and 1 part of liquid nitrile rubber; and the inner layer comprises the following raw materials by weight: 15 parts of polyester mesh cloth.

[0065] The preparation method of the fullerene-castor oil modified epoxy resin composite and the nano-silicon dioxide-graphene modified chitosan composite in this example is consistent with that in Example 1. The preparation method of the breathable film material for down jackets in this example is consistent with that in Example 1.

[0066] Example 4: This example discloses a breathable film material for down jacket, which is composed of an outer layer, an intermediate film layer and an inner layer. The outer layer is nylon, the intermediate film layer comprises fullerene-castor oil modified epoxy resin composite, nano-silica-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0067] The outer layer comprises the following raw materials in parts by weight: 20 parts of nylon; the intermediate film layer comprises the following raw materials in parts by weight: 35 parts of fullerene-castor oil modified epoxy resin composite, 25 parts of nano-silica-graphene modified chitosan composite and 2 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 20 parts of polyester mesh cloth.

[0068] The preparation method of the fullerene-castor oil modified epoxy resin composite and the nano-silica-graphene modified chitosan composite of this example is consistent with that of Example 1. The preparation method of the breathable film material for down jacket of this example is consistent with that of Example 1.

[0069] Control group 1: This example discloses a breathable film material for down jacket, which is composed of an outer layer, an intermediate film layer and an inner layer. The outer layer is nylon, the intermediate film layer comprises nano-silica-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0070] The outer layer comprises the following raw materials in parts by weight: 18 parts of nylon; the intermediate film layer comprises the following raw materials in parts by weight: 26 parts of nano-silica-graphene modified chitosan composite and 2 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 18 parts of polyester mesh cloth.

[0071] The preparation method of the nano-silica-graphene modified chitosan composite of this example is consistent with that of Example 1. The preparation method of the breathable film material for down jacket of this example is consistent with that of Example 1.

[0072] Control group 2: This example discloses a breathable film material for down jacket, which is composed of an outer layer, an intermediate film layer and an inner layer. The outer layer is nylon, the intermediate film layer comprises fullerene, nano-silica-graphene modified chitosan composite and liquid nitrile rubber, and the inner layer is polyester mesh cloth.

[0073] The outer layer comprises the following raw materials in parts by weight: 18 parts of nylon; the intermediate film layer comprises the following raw materials in parts by weight: 32 parts of fullerene, 26 parts of nano-silica-graphene modified chitosan composite and 2 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 18 parts of polyester mesh cloth.

[0074] The preparation method of the fullerene and nanosilica-graphene modified chitosan composite material of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable coated material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0075] The breathable coated material for down jackets of the present embodiment is disclosed, which is composed of an outer layer, an intermediate coated layer and an inner layer, the outer layer is nylon, the intermediate coated layer comprises a castor oil modified epoxy resin composite material, a nanosilica-graphene modified chitosan composite material and a liquid nitrile rubber, and the inner layer is a polyester mesh cloth.

[0076] The outer layer comprises the following raw materials in parts by weight: 18 parts of nylon; the intermediate coated layer comprises the following raw materials in parts by weight: 32 parts of a castor oil modified epoxy resin composite material, 26 parts of a nanosilica-graphene modified chitosan composite material and 2 parts of a liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 18 parts of a polyester mesh cloth.

[0077] The preparation method of the castor oil modified epoxy resin composite material and the nanosilica-graphene modified chitosan composite material of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable coated material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0078] The breathable coated material for down jackets of the present embodiment is disclosed, which is composed of an outer layer, an intermediate coated layer and an inner layer, the outer layer is nylon, the intermediate coated layer comprises a castor oil modified epoxy resin composite material, a nanosilica-graphene modified chitosan composite material and a liquid nitrile rubber, and the inner layer is a polyester mesh cloth.

[0079] The outer layer comprises the following raw materials in parts by weight: 18 parts of nylon; the intermediate coated layer comprises the following raw materials in parts by weight: 32 parts of a castor oil modified epoxy resin composite material, 26 parts of a nanosilica-graphene modified chitosan composite material and 2 parts of a liquid nitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 18 parts of a polyester mesh cloth.

[0080] The preparation method of the castor oil modified epoxy resin composite material and the nanosilica-graphene modified chitosan composite material of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable coated material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0081] The breathable coated material for down jackets of the present embodiment is disclosed, which is composed of an outer layer, an intermediate coated layer and an inner layer, the outer layer is nylon, the intermediate coated layer comprises a castor oil modified epoxy resin composite material, a nanosilica-graphene modified chitosan composite material and a liquid nitrile rubber, and the inner layer is a polyester mesh cloth.

[0082] The outer layer comprises the following raw materials by weight: 18 parts of nylon; the intermediate film layer comprises the following raw materials by weight: 32 parts of fullerene-castor oil modified epoxy resin composite, 26 parts of graphene modified chitosan composite, and 2 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials by weight: 18 parts of polyester mesh cloth.

[0083] The preparation method of the fullerene-castor oil modified epoxy resin composite and the graphene modified chitosan composite of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable film material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0084] The preparation method of the fullerene-castor oil modified epoxy resin composite and the graphene modified chitosan composite of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable film material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0085] The outer layer comprises the following raw materials by weight: 18 parts of nylon; the intermediate film layer comprises the following raw materials by weight: 32 parts of fullerene-castor oil modified epoxy resin composite, 26 parts of graphene modified chitosan composite, and 2 parts of liquid nitrile rubber; and the inner layer comprises the following raw materials by weight: 18 parts of polyester mesh cloth.

[0086] The preparation method of the fullerene-castor oil modified epoxy resin composite and the graphene modified chitosan composite of the present embodiment is consistent with that of Embodiment 1. The preparation method of the breathable film material for down jackets of the present embodiment is consistent with that of Embodiment 1.

[0087] Test verification:

[0088] 1. Breathability test: using a breathability tester, the sample size is 15 cm x 15 cm, the test temperature is 20 ± 2℃, the relative humidity is 65 ± 2%, and the test pressure difference is 100 Pa.

[0089] 2. Waterproofness test: using a hydrostatic pressure tester, the sample size is 20 cm x 20 cm, the test temperature is 20 ± 2℃, the water pressure rising rate is 10 ± 0.5 cm / min, and the test is stopped until the third water droplet appears.

[0090] 3. Dynamic water vapor transmission performance test: using a dynamic moisture resistance tester, the sample size is 10 cm x 10 cm, the test temperature is 35℃, the relative humidity is 40% to 90% cycle, the test time is 24 h, and the water vapor transmission rate change under different humidity is recorded.

[0091] 4. Warm-keeping performance test: using a heat retention tester, the sample size is 30 cm x 30 cm, the test hot plate temperature is 38℃, the environmental temperature is 20℃, and the test time is 30 min.

[0092] 5. Microstructure characterization: Pore size distribution test was conducted by nitrogen adsorption-desorption method. The sample was vacuum degassed at high temperature to remove the impurities adsorbed on the surface, and then placed in liquid nitrogen. Nitrogen was gradually adsorbed to the surface of the sample at low temperature to form a multilayer adsorption film. As the temperature increased, the adsorbed nitrogen was gradually desorbed. The pore size distribution was analyzed by measuring the desorption curve. The interlayer spacing was tested by X-ray diffractometer. The sample was prepared into powder and then placed in the X-ray beam. The diffraction pattern was recorded. The interlayer spacing was calculated according to the position and intensity of the diffraction peak.

[0093] 6. Others: (1) CLO value: tested by thermal resistance tester, test temperature 20±2℃, relative humidity 65±2%, test time 30min; (2) thickness: tested by digital thickness gauge, sample size 10cm×10cm, test pressure 1kPa; (3) weight: tested by precision electronic balance, sample size 100cm 2 .

[0094] Table 1. Basic physical property test results

[0095]

[0096] Table 2. Dynamic water vapor transmission performance test results

[0097]

[0098] Table 3. Temperature gradient test results (ambient temperature 20℃)

[0099]

[0100] Table 4. Microstructure characteristics

[0101]

[0102] From the basic physical properties, the air permeability (7.2~8.8mm / s) and hydrostatic pressure (23.4~27.3kPa) of the down jackets prepared by the example group were better than those of the control group (4.9~6.5mm / s and 17.2~20.3kPa), which was mainly due to the synergistic effect of fullerene-castor oil modified epoxy resin and nano-silica-graphene modified chitosan. In particular, example 1 performed best, with an air permeability of 8.8mm / s, while maintaining an excellent hydrostatic pressure of 26.5kPa, reflecting air permeability-water balance. In terms of CLO value, the example group (3.2~3.9) was about 30% higher than the control group (2.5~3.1), showing improved warmth.

[0103] Dynamic water vapor transmission performance tests show that the water vapor transmission rate (8500-10500 g / m 2 ·24h) of the breathable film materials used in the down jackets prepared in the example group is much higher than that of the control group (5500-7500 g / m 2 ·24h), and the wet resistance value is significantly reduced (7.2-9.5 vs. 11.0-13.8 m 2 ·Pa / W). More notably, the example group exhibits better humidity responsiveness under different humidity environments, with a moisture absorption rate of 11.8-13.2% at 90% RH, which is significantly higher than that of the control group (8.5-10.2%), indicating that the material has good humidity regulation capacity.

[0104] Temperature gradient test data show that the breathable film materials used in the down jackets prepared in the example group form a steeper temperature gradient (19.1-34.0℃ / mm), which is significantly higher than that of the control group (11.0-17.8℃ / mm), which corresponds to their higher heat retention rate (88.3-93.5% vs. 74.8-79.3%). Microstructure characteristics reveal the fundamental reason for the performance improvement: the example group has a smaller average pore size (42-52 nm) and higher porosity (65.2-70.5%), while maintaining a larger specific surface area (362-398 m 2 / g) and smaller interlayer spacing (0.82-0.92 nm). This optimized microstructure enables the material to achieve selective transmission of water molecules and effective management of heat while maintaining the necessary mechanical strength.

[0105] Finally, it should be noted that although the present application has been described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A breathable film material for a down jacket, characterized by, The outer layer is nylon, the intermediate film layer comprises fullerene-castor oil modified epoxy resin composite, nano-silica-graphene modified chitosan composite and liquid butadiene-acrylonitrile rubber, and the inner layer is polyester mesh cloth; the outer layer comprises the following raw materials in parts by weight: 15-25 parts of nylon; the intermediate film layer comprises the following raw materials in parts by weight: 30-40 parts of fullerene-castor oil modified epoxy resin composite, 20-30 parts of nano-silica-graphene modified chitosan composite and 1-3 parts of liquid butadiene-acrylonitrile rubber; and the inner layer comprises the following raw materials in parts by weight: 15-25 parts of polyester mesh cloth; the preparation method of the fullerene-castor oil modified epoxy resin composite comprises the following steps: S11. Fullerene-C 60 is added into tetrahydrofuran, and ultrasonic treatment is performed for 30-40 min to obtain a pretreated fullerene-C 60 solution; S12. Castor oil is added into epoxy resin, and stirring is performed at a temperature of 80-90 DEG C and a rotating speed of 200-300 rpm for 2-3 h to obtain castor oil modified epoxy resin; S13. The pretreated fullerene-C 60 The solution is slowly added to the castor oil modified epoxy resin, and then stirred for 30-40 min to obtain a stirred mixture, the stirred mixture is ultrasonically treated for 15-30 min to obtain an ultrasonically treated mixture, the ultrasonically treated mixture is vacuum degassed for 20-30 min to obtain a vacuum degassed mixture, and then methyltetrahydrophthalic anhydride is added to the vacuum degassed mixture to obtain a mixture; S14. Apply polydimethylxylene glycol on the surface of the mold to obtain a pretreated mold, pour the mixture into the pretreated mold, and then perform step-by-step curing, first at 80-90℃ for 2-3 h, then at 120-130℃ for 2-3 h, and finally at 150-160℃ for 2-3 h to obtain a cured product, and then cool the cured product to room temperature to obtain a fullerene-castor oil modified epoxy resin composite; the preparation method of the nano-silicon dioxide-graphene modified chitosan composite material comprises the following steps: S21. Add graphene oxide to deionized water, and then ultrasonically treat for 50-60 min to obtain a graphene oxide dispersion; S22. Add chitosan to a 2-5 wt% acetic acid solution, and then stir at 300-400 rpm for 4-5 h to obtain a chitosan solution; S23. Vacuum dry the nano-silicon dioxide at 80-90℃ for 4-5 h to obtain pretreated nano-silicon dioxide, add 3-aminopropyl triethoxysilane to the pretreated nano-silicon dioxide, and then react at 80-90℃ for 2-3 h to obtain reacted nano-silicon dioxide, centrifuge the reacted nano-silicon dioxide at 8000-9000 rpm for 10-20 min to obtain centrifuged nano-silicon dioxide, wash the centrifuged nano-silicon dioxide with ethanol for 3-4 times to obtain washed nano-silicon dioxide, and then dry the washed nano-silicon dioxide at 60-70℃ for 12-18 h to obtain surface modified nano-silicon dioxide; S24. Add the surface modified nano-silicon dioxide to the graphene oxide dispersion, and then ultrasonically treat for 30-40 min to obtain a mixed dispersion, slowly drop the mixed dispersion into the chitosan solution, and then stir at 300-400 rpm for 2-3 h to obtain solution A, ultrasonically treat the solution A for 30-40 min to obtain solution B, add a glutaraldehyde solution to the solution B to obtain solution C, and then stir the solution C for 30-40 min to obtain solution D; S25. Pour the solution D into a polytetrafluoroethylene mold, and then stand at room temperature for 12-24 h to obtain product A, dry the product A in an oven at 50-60℃ for 24-36 h to obtain product B, soak the product B in deionized water for 24-36 h to obtain product C, and then vacuum dry the product C at 50-60℃ for 12-24 h to obtain a nano-silicon dioxide-graphene modified chitosan composite material.

2. The preparation method of the breathable film material for down jacket, which is applied to the preparation of the breathable film material for down jacket according to claim 1, characterized in that, The method comprises the following steps: S31, drying the nylon fabric at 60-70 DEG C for 30-40 min to obtain dried nylon fabric, and naturally cooling the dried nylon fabric to room temperature to obtain an outer layer material; S32, mixing and stirring fullerene-castor oil modified epoxy resin composite material, nano silicon dioxide-graphene modified chitosan composite material and liquid nitrile rubber for 30-40 min, and then vacuum degassing for 15-20 min to obtain an intermediate film layer; S33, uniformly coating the intermediate film layer on the outer layer material, the coating thickness is 0.2-0.3 mm, to obtain a coating layer, covering a polyester mesh cloth inner layer on the coating layer to obtain a preliminary film material, and hot pressing the preliminary film material at 130-140 DEG C and 0.5-0.8 MPa for 60-90 s to obtain a secondary film material, cold pressing the secondary film material at 0.5-0.6 MPa for 30-40 s to obtain a tertiary film material, and naturally airing the tertiary film material for 24-48 h to obtain a breathable film material for down jackets.

Images