CN108905643A - Composite nano fiber filter membrane and preparation method thereof - Google Patents
Composite nano fiber filter membrane and preparation method thereof Download PDFInfo
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- CN108905643A CN108905643A CN201810673544.2A CN201810673544A CN108905643A CN 108905643 A CN108905643 A CN 108905643A CN 201810673544 A CN201810673544 A CN 201810673544A CN 108905643 A CN108905643 A CN 108905643A
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- filter membrane
- preparation
- composite nano
- fiber filter
- spinning
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Classifications
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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
-
- 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
- B01D67/0002—Organic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0223—Vinyl resin fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0223—Vinyl resin fibres
- B32B2262/0238—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
Abstract
The present invention relates to a kind of composite nano fiber filter membranes and preparation method thereof, which is characterized in that includes the following steps：S1, one or more spinning solutions and non-woven base fabric are provided；S2, by spinning solution under conditions of environment temperature is 20-30 DEG C, relative humidity is 50-60%, ordered nano-fibers film is obtained by electrostatic spinning；S3, it will at least two ordered nano-fibers films and non-woven base fabric imprint, and obtain composite nano-fiber membrane, wherein ordered nano-fibers film is arranged between two layers of non-woven base fabric, and the fiber orientation of adjacent two ordered nano-fibers films is mutually perpendicular to.The preparation method passes through the distance between parallel grid of regulating rotation speed of drum, roller, the superposition number of plies of film, to control the distance between parallel fibers on ordered nano-fibers film, prepare the filter membrane of specific pore rate, its simple process, cost is relatively low, the composite nano fiber filter membrane of excellent, the selective filtering feature of physical and chemical performance can be prepared, there is biggish application prospect.
Description
Technical field
The present invention relates to a kind of composite nano fiber filter membranes and preparation method thereof.
Background technique
As a kind of novel high score from, concentration, purification and purification techniques, membrane separation technique is in sea water desalination, work
It is used widely in the fields such as industry wastewater treatment, environmental pollution improvement.Nanofiber filter membrane has specific surface area height, porosity
High, the advantages that pore-size distribution is small, hole continuity is good, flux is high, it is a kind of ideal high efficiency filter material, is water filtration technology
Exploitation and design open new thinking.But traditional single layer nanofiber filter membrane can only filter fixed particle size range
Particle, therefore it is not able to satisfy the production requirement of people.When people need the particle size of the particle filtered to change, just need
The nano fibrous membrane of different porosities is replaced, human cost is allowed in this way and time cost greatly increases.
Based on the above situation, the present invention proposes a kind of complex ordered nano fibrous membrane filter material of achievable selective filter
Material and preparation method thereof.
Summary of the invention
The purpose of the present invention is to provide a kind of composite nano fiber filter membranes and preparation method thereof, can pass through simple technique
The composite nano fiber filter membrane of achievable selective filter is prepared with lower cost.
In order to achieve the above objectives, the present invention provides the following technical solutions：A kind of preparation method of composite nano fiber filter membrane,
Include the following steps：
S1, one or more spinning solutions and non-woven base fabric are provided；
S2, by the spinning solution under conditions of environment temperature is 20-30 DEG C, relative humidity is 50-60%, by quiet
Electrospun obtains ordered nano-fibers film；
S3, it will at least two ordered nano-fibers films imprint, obtain described compound with the non-woven base fabric
Nano fibrous membrane, wherein the ordered nano-fibers film is arranged between two layers of non-woven base fabric, has described in adjacent two
The fiber orientation of sequence nano fibrous membrane is mutually perpendicular to.
Further, solute is contained in the spinning solution, the solute is selected from polyacrylonitrile (PAN), polyvinyl pyrrole
Any one or more in alkanone (PVP), polyurethane or Kynoar (PVDF).
Further, solvent is also contained in the spinning solution, the solvent is selected from dehydrated alcohol, N, N- dimethyl formyl
The mixed solution of amine, n,N-Dimethylformamide or n,N-Dimethylformamide and acetone is any one or more of.
Further, the concentration of the spinning solution is 5wt%-25wt%.
Further, the electrostatic spinning carries out in electrostatic spinning apparatus, and the electrostatic spinning apparatus includes air pump, leads
Tracheae, bubble generator, roller receiver and high voltage power supply, the gas-guide tube connect the air pump and bubble generator, institute
State the positive and negative anodes that conducting medium and the roller receiver in bubble generator are separately connected the DC high-voltage power supply.
Further, the roller receiver is covered with aluminium foil.
Further, in step S2, during the electrostatic spinning, spinning voltage 40-60kv.
Further, in step S2, during the electrostatic spinning, between the bubble generator and roller receiver
Apart from adjustable range be 15-21cm.
The present invention also provides a kind of composite nano fiber filter membranes obtained according to the preparation method.
Compared with prior art, the beneficial effects of the present invention are：The preparation side of composite nano fiber filter membrane of the invention
Method can according to need the particle size of filtering when preparing the complex ordered nanofiber filter membrane, by regulating rotation speed of drum,
The distance between parallel grid of roller, the superposition number of plies of film, come control on ordered nano-fibers film between parallel fibers away from
From the filter membrane of specific pore rate being prepared, to realize selective filter.The preparation method passes through simple technique and lower
The composite nano fiber filter membrane of excellent, the selective filtering feature of physical and chemical performance can be prepared in cost, have biggish
Application prospect.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the process step figure of the preparation method of composite nano fiber filter membrane shown in the present invention；
Fig. 2 is the structural schematic diagram of composite nano fiber filter membrane shown in the embodiment of the present invention two.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Referring to Figure 1, the preparation method of composite nano fiber filter membrane shown in the present invention, includes the following steps：
S1, one or more spinning solutions and non-woven base fabric are provided；
S2, by the spinning solution under conditions of environment temperature is 20-30 DEG C, relative humidity is 50-60%, by quiet
Electrospun obtains ordered nano-fibers film；
S3, it will at least two ordered nano-fibers films imprint, obtain described compound with the non-woven base fabric
Nano fibrous membrane, wherein the ordered nano-fibers film is arranged between two layers of non-woven base fabric, has described in adjacent two
The fiber orientation of sequence nano fibrous membrane is mutually perpendicular to.
Specifically, containing solute and solvent in the spinning solution, the solute is selected from polyacrylonitrile, polyvinylpyrrolidine
Any one or more in ketone, polyurethane or Kynoar, the solvent are selected from dehydrated alcohol, N, N- dimethyl formyl
The mixed solution of amine, n,N-Dimethylformamide or n,N-Dimethylformamide and acetone is any one or more of.To guarantee
The homogeneity and order of obtained tunica fibrosa, the concentration of the spinning solution are 5wt%-25wt%.In the Static Spinning
During silk, spinning voltage 40-60kv；The distance between the bubble generator and roller receiver adjustable range are 15-
21cm。
Electrostatic spinning of the invention carries out in conventional electrostatic spinning apparatus, and the electrostatic spinning apparatus includes air pump, leads
Tracheae, bubble generator, roller receiver and high voltage power supply, the gas-guide tube connect the air pump and bubble generator, institute
It states roller receiver to be covered with aluminium foil, the conducting medium in the bubble generator is separately connected described with the roller receiver
The positive and negative anodes of DC high-voltage power supply.After experimental provision inspection is errorless, solution is poured into bubble generator, adjusts air pump to control
Number of bubbles and size open high voltage power supply and adjust voltage and start spinning until after capable of generating stable bubble.Experiment terminates
Afterwards, the high voltage power supply that returns to zero simultaneously is cut off the power, and is then removed the aluminium foil on receiver, is collected into ordered nano-fibers film, finally will
At least two layers of nano fibrous membrane is imprinted with two layers of non-woven base fabric, obtains composite nano-fiber membrane.
Following embodiment be with the number of plies of nano fibrous membrane in composite nano-fiber membrane 2 and 3 be illustrated, but itself and it is unlimited
The system present invention.
Embodiment one
It weighs 10g PVP powder to be added in 30g dehydrated alcohol, at room temperature magnetic agitation 2h, being configured to PVP concentration is
The spinning solution of 25wt%.Spinning solution is poured into liquid storage tank, it is 15cm that adjustment, which receives distance, opens air pump.Control experimental situation temperature
Degree at 20 DEG C, relative humidity is 50%, the particle size filtered as needed, regulating rotation speed of drum, roller parallel grid it
Between distance.The gas-guide tube of air pump is connected with bubble generator, conducting medium and roller receiver difference in bubble generator
The positive and negative anodes of DC high-voltage power supply are connected, roller receiver is covered with aluminium foil.It connects high voltage power supply and adjusts voltage to 55kV, electricity
Field force overcomes bubble surface tension to form nanofiber.Fig. 2 is referred to, after experiment, the high voltage power supply that returns to zero simultaneously is cut off the power,
Then the aluminium foil on receiver is removed, ordered nano-fibers film 2 is collected into.Two ordered nano-fibers films 2 non-are knitted with two layers
It makes base fabric 1 to press by with ultrasonic wave marking press, so that the fiber orientation of ordered nano-fibers film 2 is mutually perpendicular to, obtains compound receive
Rice fibrous filter membrane.
Embodiment two
It weighs a certain amount of PAN powder to be added in DMF, at room temperature magnetic agitation 2h, being configured to PAN concentration is 18wt%
Spinning solution.Spinning solution is poured into liquid storage tank, it is 18cm that adjustment, which receives distance, opens air pump.Experimental situation temperature is controlled 25
DEG C, relative humidity is 55%, the particle size filtered as needed, regulating rotation speed of drum, roller parallel grid between away from
From.The gas-guide tube of air pump is connected with bubble generator, and the conducting medium and roller receiver in bubble generator are separately connected directly
The positive and negative anodes of high voltage power supply are flowed, roller receiver is covered with aluminium foil.It connects high voltage power supply and adjusts voltage to 50kV, electric field is made every effort to overcome
Convinced bubble surface tension forms nanofiber.After experiment, the high voltage power supply that returns to zero simultaneously is cut off the power, and is then removed on receiver
Aluminium foil, be collected into ordered nano-fibers film.Three ordered nano-fibers films and two layers of non-woven base fabric are pressed with ultrasonic wave pressure
The pressing of print machine, so that the fiber orientation of ordered nano-fibers film is mutually perpendicular to, obtains composite nano fiber filter membrane.
Embodiment three
It weighs a certain amount of PVDF powder and is added to DMF/ acetone (wt%=1:1) in binary solvent, magnetic force is stirred at room temperature
2h is mixed, the spinning solution that PVDF concentration is 25wt% is configured to.Spinning solution is poured into liquid storage tank, it is 20cm that adjustment, which receives distance, is beaten
Open air pump.Experimental situation temperature is controlled at 30 DEG C, relative humidity is 60%, the particle size filtered as needed, adjusts roller
The distance between revolving speed, parallel grid of roller.The gas-guide tube of air pump is connected with bubble generator, the conduction in bubble generator
Medium and roller receiver are separately connected the positive and negative anodes of DC high-voltage power supply, and roller receiver is covered with aluminium foil.Connect high-voltage electricity
Source simultaneously adjusts voltage to 60kV, and electric field force overcomes bubble surface tension to form nanofiber.After experiment, return to zero high voltage power supply
And cut off the power, the aluminium foil on receiver is then removed, ordered nano-fibers film is collected into.By two ordered nano-fibers films with
Two layers of non-woven base fabric is pressed to be pressed with ultrasonic wave marking press, so that the fiber orientation of ordered nano-fibers film is mutually perpendicular to, is obtained
Composite nano fiber filter membrane.
Embodiment one to three obtained composite nano fiber filter membrane filter efficiency it is as shown in the table：
As seen from table in embodiment two preparation-obtained composite nano fiber filter membrane have preferable filter efficiency,
Up to 88.9%.
In summary：The preparation method of composite nano fiber filter membrane of the invention is preparing the complex ordered nanofiber filter
When film, the particle size of filtering can according to need, pass through the distance between parallel grid of regulating rotation speed of drum, roller, film
The superposition number of plies prepare the filter membrane of specific pore rate to control the distance between parallel fibers on ordered nano-fibers film, from
And realize selective filter.The preparation method is prepared by simple technique and lower cost, and physical chemistry can be prepared
It has excellent performance, the composite nano fiber filter membrane of selective filtering feature, there is biggish application prospect.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of preparation method of composite nano fiber filter membrane, which is characterized in that include the following steps：
S1, one or more spinning solutions and non-woven base fabric are provided；
S2, by the spinning solution under conditions of environment temperature is 20-30 DEG C, relative humidity is 50-60%, pass through Static Spinning
Silk obtains ordered nano-fibers film；
S3, it will at least two ordered nano-fibers films be imprinted with the non-woven base fabric, and obtain the composite Nano
Tunica fibrosa, wherein the ordered nano-fibers film is arranged between two layers of non-woven base fabric, and adjacent two described orderly to receive
The fiber orientation of rice tunica fibrosa is mutually perpendicular to.
2. the preparation method of composite nano fiber filter membrane as described in claim 1, which is characterized in that contain in the spinning solution
Have a solute, the solute in polyacrylonitrile, polyvinylpyrrolidone, polyurethane or Kynoar any one or it is more
Kind.
3. the preparation method of composite nano fiber filter membrane as claimed in claim 2, which is characterized in that in the spinning solution also
Containing solvent, the solvent is selected from dehydrated alcohol, n,N-Dimethylformamide, n,N-Dimethylformamide or N, N- dimethyl methyl
The mixed solution of amide and acetone is any one or more of.
4. the preparation method of composite nano fiber filter membrane as described in claim 1, which is characterized in that the spinning solution it is dense
Degree is 5wt%-25wt%.
5. the preparation method of composite nano fiber filter membrane as described in claim 1, which is characterized in that the electrostatic spinning is quiet
It is carried out in electric spinning device, the electrostatic spinning apparatus includes air pump, gas-guide tube, bubble generator, roller receiver and height
Voltage source, the gas-guide tube connect the air pump and bubble generator, conducting medium and the rolling in the bubble generator
Cylinder receiver is separately connected the positive and negative anodes of the DC high-voltage power supply.
6. the preparation method of composite nano fiber filter membrane as claimed in claim 5, which is characterized in that the roller receiver is used
Aluminium foil covering.
7. the preparation method of composite nano fiber filter membrane as claimed in claim 5, which is characterized in that in step S2, described
During electrostatic spinning, spinning voltage 40-60kv.
8. the preparation method of composite nano fiber filter membrane as claimed in claim 5, which is characterized in that in step S2, described
During electrostatic spinning, the distance between the bubble generator and roller receiver adjustable range are 15-21cm.
It compound is received 9. the preparation method of composite nano fiber filter membrane according to any one of claim 1 to 8 is obtained
Rice fibrous filter membrane.
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| CN201810673544.2A CN108905643A (en) | 2018-06-27 | 2018-06-27 | Composite nano fiber filter membrane and preparation method thereof |
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| CN201810673544.2A CN108905643A (en) | 2018-06-27 | 2018-06-27 | Composite nano fiber filter membrane and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021069952A1 (en) * | 2019-10-07 | 2021-04-15 | The Stellenbosch Nanofiber Company (Pty) Ltd | Method of preparing a cosmetic component |
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| WO2021069952A1 (en) * | 2019-10-07 | 2021-04-15 | The Stellenbosch Nanofiber Company (Pty) Ltd | Method of preparing a cosmetic component |
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