Preparation method, material and equipment of nanofiber composite material for moisture absorption

Abstract

The invention discloses a preparation method, material and equipment of a nanofiber composite material for moisture absorption, which comprises the following steps: dissolving moisture absorption salt and a water absorption polymer in a solvent according to a preset mass ratio to obtain a composite solution; placing the composite solution in a blowing spinning assembly for blowing spinning forming to obtain flocculent nanofibers; finally, the flocculent nanofibers are pressed into plate-shaped nanofibers, then the plate-shaped nanofibers are prepared into a wheel-shaped honeycomb structure, the nanofiber composite material obtained through the preparation method provided by the invention has a larger specific surface area and an air contact area, and therefore air can be adsorbed in a larger humidity range; and all-weather air water production of the air water production equipment is further realized.

Description

Technical Field

[0001] This invention belongs to the field of moisture absorption technology, specifically relating to a method, materials, and equipment for preparing a moisture-absorbing nanofiber composite material. Background Technology

[0002] An air-to-water generator can condense water molecules in the air into liquid water, which is then collected in a storage tank and purified to produce high-quality drinking water.

[0003] A crucial aspect of air-to-water generators is the conversion of moisture from the air. Currently, the technology for adsorbing moisture from the air is demanding and costly, making it difficult to achieve all-weather air-to-water generation. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a method, material and equipment for preparing moisture-absorbing nanofiber composite materials, so as to solve the problem that the prior art cannot achieve all-weather air-to-water conversion.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for using moisture-absorbing nanofiber composite materials, comprising:

[0006] The hygroscopic salt and water-absorbing polymer are dissolved in a solvent according to a preset mass ratio to obtain a composite solution;

[0007] The composite solution is placed in a blow spinning assembly and blow spun to obtain flocculent nanofibers.

[0008] The flocculent nanofibers are compressed into plate-shaped nanofibers, and then the plate-shaped nanofibers are used to prepare a wheel-shaped honeycomb structure.

[0009] Furthermore, the mass ratio of the hygroscopic salt and the water-absorbing polymer when fused is in the range of 3:1 to 1:10;

[0010] The mass percentage of solute in the resulting composite solution ranged from 0.1% to 70%.

[0011] The particle size of the hygroscopic salt ranges from 0.01 μm to 600 μm.

[0012] Furthermore, the hygroscopic salt is made from one or a combination of the following materials:

[0013] Silica gel, calcium chloride, lithium chloride, lithium bromide, alumina, titanium dioxide, and molecular sieves.

[0014] Furthermore, the absorbent polymer is made of one or a combination of the following materials:

[0015] Polyethylene, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyethylene terephthalate, acrylate copolymers, polyvinylidene fluoride, polypropylene, polyethylene oxide, vinyl acetate and polyvinylidene chloride resin.

[0016] Furthermore, the solvent may be one or a combination of the following materials:

[0017] Water, benzene, toluene, xylene, hexane, cyclohexane, cyclohexanone, chlorobenzene, methanol, ethanol, isopropanol, diethyl ether, methyl acetate, acetone, acetonitrile, pyridine, ethylene glycol monomethyl ether, and N,N-dimethylformamide.

[0018] Furthermore, the step of placing the composite solution in a blown spinning assembly for blown spinning includes:

[0019] The composite solution is mixed evenly and then placed into a syringe with a preset flow rate; wherein, the syringe is equipped with a microporous nozzle;

[0020] The microporous nozzle is blow-dried at a preset airflow speed, and collected using a flat plate or roller as a collection device.

[0021] Furthermore, the blown drying time is 10 min to 600 min;

[0022] The thickness of the plate-shaped nanofibers is 0.7 mm to 10 mm.

[0023] This application provides a nanofiber composite material for moisture absorption, which is prepared according to the preparation method of the nanofiber composite material for moisture absorption described in any of the above embodiments.

[0024] This application provides an air-to-water device, including a moisture absorption device, which comprises the nanofiber composite material described in the above embodiments.

[0025] The beneficial effects that can be achieved by adopting the above technical solution in this invention are as follows:

[0026] This application first prepares a composite solution by dissolving hygroscopic salt and polymer materials in a solvent according to a predetermined weight ratio; then, the composite solution is blown out in a blown spinning assembly to form a composite material, and finally, a plate-shaped material is prepared by pressing. The nanofiber composite material prepared by this method has a larger specific surface area and air contact area, enabling it to adsorb air over a wider humidity range. This allows air-to-water devices using nanofiber composite materials to achieve all-weather air-to-water production. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the steps in the preparation method of the moisture-absorbing nanofiber composite material of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] The following describes, with reference to the accompanying drawings, a specific method, materials, and equipment for preparing a moisture-absorbing nanofiber composite material provided in the embodiments of this application.

[0031] like Figure 1 As shown, this embodiment provides a method, materials, and equipment for preparing moisture-absorbing nanofiber composite materials, including:

[0032] S101, Dissolve the hygroscopic salt and water-absorbing polymer in a solvent according to a preset mass ratio to obtain a composite solution;

[0033] In some embodiments, the mass ratio of the hygroscopic salt and the water-absorbing polymer when fused is in the range of 3:1 to 1:10;

[0034] The mass percentage of solute in the resulting composite solution ranged from 0.1% to 70%.

[0035] The particle size of the hygroscopic salt ranges from 0.01 μm to 600 μm.

[0036] Specifically, the weight ratio of the hygroscopic salt to the polymer in this application is between 3:1 and 1:10, and the mass percentage of the solute in the composite material solution is 0.1-70%. The hygroscopic salt includes one or more materials selected from silica gel, calcium chloride, lithium chloride, lithium bromide, alumina, titanium dioxide, and molecular sieves.

[0037] The polymer material includes one or more of polyethylene (PE), polyvinyl alcohol (PVA), polystyrene (PS), polyvinyl chloride (PVC), polyethylene terephthalate (PET), acrylate copolymer, polyvinylidene fluoride (PVDF), polypropylene (PP), polyethylene oxide (PEO), vinyl acetate, and polyvinylidene chloride resin (PVDC).

[0038] The solvent can be one or a mixture of water, benzene, toluene, xylene, hexane, cyclohexane, cyclohexanone, chlorobenzene, methanol, ethanol, isopropanol, diethyl ether, methyl acetate, acetone, acetonitrile, pyridine, ethylene glycol monomethyl ether, and N,N-dimethylformamide (DMF).

[0039] S102, the composite solution is placed in the blow spinning assembly and blow spun to obtain flocculent nanofibers;

[0040] In some embodiments, placing the composite solution in a blown spinning assembly for blown spinning includes:

[0041] The composite solution is mixed evenly and then placed into a syringe with a preset flow rate; wherein, the syringe is equipped with a microporous nozzle;

[0042] The microporous nozzle is blow-dried at a preset airflow speed, and collected using a flat plate or roller as a collection device.

[0043] Specifically, the composite solution is thoroughly mixed and then loaded into a syringe equipped with a microporous nozzle. The syringe's flow rate is set to 0.2-3 ml / h. A dry, compressed, parallel airflow is blown at the nozzle at a speed of 5 m / s-20 m / s. A flat plate or a roller is used as the collection device. The blowing and drying time is 10 min-600 min.

[0044] S103, the flocculent nanofibers are pressed into plate-shaped nanofibers, and then the plate-shaped nanofibers are used to prepare a wheel-shaped honeycomb structure.

[0045] In some embodiments, the thickness of the plate-like nanofibers is 0.7 mm to 10 mm.

[0046] Finally, the obtained flocculent nanofibers are pressed into plate-like structures with a thickness of 0.7 mm to 10 mm, and then processed through cutting and bonding to prepare a wheel-shaped honeycomb structure. It is understandable that the wheel-shaped honeycomb structure allows the nanofiber composite material to have a larger specific surface area and air contact area, enabling it to adsorb air over a wider humidity range.

[0047] This application provides a nanofiber composite material, which is prepared according to the preparation method of the moisture-absorbing nanofiber composite material described in any of the above embodiments.

[0048] The nanofiber composite material obtained in this application has a larger specific surface area and air contact area, enabling it to adsorb air over a wider humidity range.

[0049] This application provides an air-to-water device, including a moisture absorption device, which comprises the nanofiber composite material described in the above embodiments.

[0050] In summary, this invention provides a method, material, and equipment for preparing a moisture-absorbing nanofiber composite material. The preparation method includes dissolving moisture-absorbing salt and water-absorbing polymer in a solvent according to a preset mass ratio to obtain a composite solution; then placing the composite solution in a blow spinning assembly to blow spin it into flocculent nanofibers; finally pressing the flocculent nanofibers into plate-shaped nanofibers, and then preparing a wheel-shaped honeycomb structure from the plate-shaped nanofibers. The nanofiber composite material obtained by the preparation method provided in this application has a larger specific surface area and air contact area, thereby enabling air adsorption over a wider humidity range and further realizing all-weather air-to-water generation in air-to-water devices.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0053] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0054] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0055] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a moisture-absorbing nanofiber composite material, characterized in that, include: The hygroscopic salt and water-absorbing polymer are dissolved in a solvent according to a preset mass ratio to obtain a composite solution; The composite solution is placed in a blow spinning assembly and blow spun to obtain flocculent nanofibers. The flocculent nanofibers are compressed into plate-shaped nanofibers, and then the plate-shaped nanofibers are used to prepare a wheel-shaped honeycomb structure.

2. The method according to claim 1, characterized in that, The mass ratio of the hygroscopic salt and the water-absorbing polymer when fused is in the range of 3:1 to 1:10; The mass percentage of solute in the resulting composite solution ranged from 0.1% to 70%. The particle size of the hygroscopic salt ranges from 0.01 μm to 600 μm.

3. The method according to claim 2, characterized in that, The hygroscopic salt is made from one or a combination of the following materials. Silica gel, calcium chloride, lithium chloride, lithium bromide, alumina, titanium dioxide, and molecular sieves.

4. The method according to claim 1, characterized in that, The water-absorbing polymer is made of one or a combination of the following materials. Polyethylene, polyvinyl alcohol, polystyrene, polyvinyl chloride, polyethylene terephthalate, acrylate copolymers, polyvinylidene fluoride, polypropylene, polyethylene oxide, vinyl acetate and polyvinylidene chloride resin.

5. The method according to claim 1, characterized in that, The solvent is one or a combination of the following materials. Water, benzene, toluene, xylene, hexane, cyclohexane, cyclohexanone, chlorobenzene, methanol, ethanol, isopropanol, diethyl ether, methyl acetate, acetone, acetonitrile, pyridine, ethylene glycol monomethyl ether, and N,N-dimethylformamide.

6. The method according to claim 1, characterized in that, The step of placing the composite solution in a blown spinning assembly and blown spinning it includes: The composite solution is mixed evenly and then placed into a syringe with a preset flow rate; wherein, the syringe is equipped with a microporous nozzle; The microporous nozzle is blow-dried at a preset airflow speed, and collected using a flat plate or roller as a collection device.

7. The method according to claim 6, characterized in that, The blown spinning drying time is 10 min to 600 min; The thickness of the plate-shaped nanofibers is 0.7 mm to 10 mm.

8. A nanofiber composite material, characterized in that, The nanofiber composite material is prepared according to any one of claims 1 to 7.

9. An air-to-water device, characterized in that, It includes a moisture-absorbing device, which comprises the nanofiber composite material of claim 8.

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