CN112999886A - Sandwich structure composite fiber breathable film and preparation method thereof - Google Patents
Sandwich structure composite fiber breathable film and preparation method thereof Download PDFInfo
- Publication number
- CN112999886A CN112999886A CN202110232273.9A CN202110232273A CN112999886A CN 112999886 A CN112999886 A CN 112999886A CN 202110232273 A CN202110232273 A CN 202110232273A CN 112999886 A CN112999886 A CN 112999886A
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- composite fiber
- breathable film
- sandwich structure
- film
- hydrophobic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a composite fiber breathable film with a sandwich structure and a preparation method thereof, wherein the composite film is a novel multifunctional composite fiber film with water resistance and air permeability. The composite fiber film is divided into a moisture permeable layer and a waterproof layer. The fiber structure, the porous structure and the surface wettability of the composite fiber membrane can be adjusted by adjusting the thickness ratio of the moisture permeable layer and the waterproof layer of the composite fiber membrane. Finally, the optimized fiber structure and porous structure, as well as the outstanding hydrophobicity and lipophilicity, enable the sandwich structure composite membrane to have good water resistance and air permeability.
Description
Technical Field
The invention relates to the technical field of breathable films, and particularly relates to a composite fiber breathable film with a sandwich structure and a preparation method thereof.
Background
The hydrophobic microporous breathable film has water resistance, water vapor resistance and oil-water separation capacity, and has attracted extensive research interest in the practical application of antifouling, selective separation, clothing protection and the like. Traditional strategies for developing hydrophobic microporous breathable films include melt blowing, melt melting, and thermal stretching. However, these processes have disadvantages of complicated manufacturing process, difficulty in adjusting the pore structure, and the like. Therefore, it is important to design a novel and simple method for preparing a hydrophobic microporous breathable film with water resistance and air permeability.
Disclosure of Invention
The invention aims to provide a composite fiber breathable film with a sandwich structure and a preparation method thereof.
The invention provides the following technical scheme:
the sandwich structure composite fiber breathable film is characterized by being prepared by the following method: dissolving a hydrophobic polymer and an additive into a solvent, stirring until the hydrophobic polymer and the additive are completely dissolved, then dissolving a hydrophilic polymer and a regulating agent into the solvent, stirring until the hydrophilic polymer and the regulating agent are completely dissolved, respectively preparing a hydrophobic layer membrane and a hydrophilic layer membrane by utilizing an electrostatic spinning technology, then clamping the hydrophilic layer membrane by two layers of hydrophobic layer membranes, and carrying out hot pressing to prepare the composite fiber membrane with the sandwich structure.
The hydrophobic polymer is one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene, polytetrafluoroethylene and the like.
The additive is one or more of carbon fiber, carbon nanotube, cellulose nanocrystal and the like.
The hydrophilic polymer is one or more of Polyurethane (PU), polyacrylonitrile, polyaniline and the like.
The regulating agent is one or more of magnesium chloride, sodium chloride, potassium chloride, zinc chloride and the like.
A composite fiber breathable film with a sandwich structure and a preparation method thereof comprise the following steps:
dispersing the hydrophobic polymer and the additive into an N, N-dimethylformamide solvent, and uniformly stirring at room temperature, wherein the concentration of the hydrophobic polymer is 5-25 wt%, and the mass ratio of the additive to the hydrophobic polymer is 1:1000-1: 10. Dissolving a hydrophilic polymer and a regulating agent into an N, N-dimethylformamide solvent, stirring at room temperature until the hydrophilic polymer and the regulating agent are completely dissolved, wherein the concentration of the hydrophilic polymer is 5-25 wt%, and the mass ratio of the regulating agent to the hydrophobic polymer is 1:20000-1: 1000. Then, an electrostatic spinning test is carried out under the environment that the temperature is 25 ℃ and the humidity is 40%, the voltage of an electrostatic spinning device is 25kV, and the flow rate is 0.1 mL/h-1L/h. And then clamping the hydrophilic layer film by using the prepared hydrophobic layer film, and carrying out hot rolling at 60 ℃ to finally prepare the composite fiber breathable film with the sandwich structure.
Compared with the prior art, the invention has the beneficial effects that: the method is simple, convenient, environment-friendly, low in cost and suitable for large-scale production. Meanwhile, the invention can control the film structure through the regulation and control of the additive and the polymer, thereby realizing the promotion of special functionality. The fiber structure, the porous structure and the surface wettability of the composite fiber membrane can be adjusted by adjusting the thickness ratio of the moisture permeable layer and the waterproof layer of the composite fiber membrane, so that the composite fiber membrane has outstanding hydrophobicity and lipophilicity and good waterproof and air permeability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1 32g of polyvinylidene fluoride and 0.5g of carbon nanotubes were dispersed in 100mL of N, N-dimethylformamide solvent and stirred at room temperature until uniform. 36g of polyurethane and 10mg of sodium chloride were dissolved in 100mL of N, N-dimethylformamide solvent, and stirred at room temperature until completely dissolved. Then, an electrostatic spinning test was carried out at a temperature of 25 ℃ and a humidity of 40%, with an electrostatic spinning device voltage of 25kV and a flow rate of 0.1L/h. And then clamping the hydrophilic layer film by using the prepared hydrophobic layer film, and carrying out hot rolling at 60 ℃ to finally prepare the composite fiber breathable film with the sandwich structure.
Example 2 32g of polyvinylidene fluoride and 0.5g of carbon fiber were dispersed in 100mL of N, N-dimethylformamide solvent and stirred at room temperature until uniform. 36g of polyurethane and 50mg of sodium chloride were dissolved in 100mL of N, N-dimethylformamide solvent, and stirred at room temperature until completely dissolved. Then, an electrostatic spinning test was carried out at a temperature of 25 ℃ and a humidity of 40%, with an electrostatic spinning device voltage of 25kV and a flow rate of 0.1L/h. And then clamping the hydrophilic layer film by using the prepared hydrophobic layer film, and carrying out hot rolling at 60 ℃ to finally prepare the composite fiber breathable film with the sandwich structure.
Example 3 32g of polyvinylidene fluoride and 0.5g of carbon nanotubes were dispersed in 100mL of N, N-dimethylformamide solvent and stirred at room temperature until uniform. 18g of polyacrylonitrile and 20mg of magnesium chloride were dissolved in 100mL of N, N-dimethylformamide solvent, and stirred at room temperature until completely dissolved. Then, an electrostatic spinning test was carried out at a temperature of 25 ℃ and a humidity of 40%, with an electrostatic spinning device voltage of 25kV and a flow rate of 0.01L/h. And then clamping the hydrophilic layer film by using the prepared hydrophobic layer film, and carrying out hot rolling at 60 ℃ to finally prepare the composite fiber breathable film with the sandwich structure.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The sandwich structure composite fiber breathable film is characterized by being prepared by the following method: dissolving a hydrophobic polymer and an additive into a solvent, stirring until the hydrophobic polymer and the additive are completely dissolved, then dissolving a hydrophilic polymer and a regulating agent into the solvent, stirring until the hydrophilic polymer and the regulating agent are completely dissolved, respectively preparing a hydrophobic layer membrane and a hydrophilic layer membrane by utilizing an electrostatic spinning technology, then clamping the hydrophilic layer membrane by two layers of hydrophobic layer membranes, and carrying out hot pressing to prepare the composite fiber membrane with the sandwich structure.
2. The sandwich structured composite fiber breathable film of claim 1, wherein: the hydrophobic polymer is one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene, polytetrafluoroethylene and the like.
3. The sandwich structured composite fiber breathable film of claim 1, wherein: the additive is one or more of carbon fiber, carbon nanotube, cellulose nanocrystal and the like.
4. The sandwich structured composite fiber breathable film of claim 1, wherein: the hydrophilic polymer is one or more of Polyurethane (PU), polyacrylonitrile, polyaniline and the like.
5. The sandwich structured composite fiber breathable film of claim 1, wherein: the regulating agent is one or more of magnesium chloride, sodium chloride, potassium chloride, zinc chloride and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110232273.9A CN112999886A (en) | 2021-03-03 | 2021-03-03 | Sandwich structure composite fiber breathable film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110232273.9A CN112999886A (en) | 2021-03-03 | 2021-03-03 | Sandwich structure composite fiber breathable film and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112999886A true CN112999886A (en) | 2021-06-22 |
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| CN202110232273.9A Pending CN112999886A (en) | 2021-03-03 | 2021-03-03 | Sandwich structure composite fiber breathable film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115212608A (en) * | 2021-06-29 | 2022-10-21 | 江苏中洲检测技术有限公司 | Oil-water separation method |
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2021
- 2021-03-03 CN CN202110232273.9A patent/CN112999886A/en active Pending
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| CN102806021A (en) * | 2012-07-27 | 2012-12-05 | 东华大学 | Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115212608A (en) * | 2021-06-29 | 2022-10-21 | 江苏中洲检测技术有限公司 | Oil-water separation method |
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