CN111467878B - Nanofiber/glass fiber composite filter material, preparation method and application thereof - Google Patents

Nanofiber/glass fiber composite filter material, preparation method and application thereof Download PDF

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Publication number
CN111467878B
CN111467878B CN202010188241.9A CN202010188241A CN111467878B CN 111467878 B CN111467878 B CN 111467878B CN 202010188241 A CN202010188241 A CN 202010188241A CN 111467878 B CN111467878 B CN 111467878B
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glass fiber
layer
nanofiber
filter material
composite filter
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CN111467878A (en
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石玉强
李建
杨超
吴耀春
钱慧
姚嘉兰
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Nanjing Fiberglass Research and Design Institute Co Ltd
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Sinoma Science and Technology Co Ltd
Nanjing Fiberglass Research and Design Institute Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B01D39/2024—Glass or glassy material the material being filamentary or fibrous otherwise bonded, e.g. by resins
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B5/022—Non-woven fabric
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
    • D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • 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
    • 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
    • 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
    • B32B2262/0246—Acrylic 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
    • B32B2262/0253—Polyolefin 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
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • 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
    • B32B2262/04—Cellulosic plastic fibres, e.g. rayon

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  • Engineering & Computer Science (AREA)
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  • General Chemical & Material Sciences (AREA)
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  • Filtering Materials (AREA)

Abstract

The invention relates to the technical field of filtration and separation, and discloses a nanofiber/glass fiber composite filter material, a preparation method and application thereof. The nanofiber/glass fiber composite filter material has a sandwich structure, and the structure enables the whole composite filter material to have the characteristic of combining surface filtration and deep filtration, so that the composite filter material has the advantages of high precision, high pollutant carrying capacity and stability.

Description

Nanofiber/glass fiber composite filter material, preparation method and application thereof
Technical Field
The invention relates to the technical field of filtration and separation, in particular to a nanofiber/glass fiber composite filter material, a preparation method and application thereof.
Background
The composite filter material is a material with new performance formed by two or more than two materials with different properties through a physical or chemical method on a macroscopic or microscopic scale. The materials generate synergistic effect, so that the comprehensive performance of the composite filter material is superior to that of the original composition material to meet various requirements, and the research on the composite filter material is widely concerned.
The nano fiber is a linear material with a diameter of nano scale and a large length and a certain length-diameter ratio, the diameter of the linear material is generally between several nanometers and several micrometers, and the superfine fiber diameter ensures that the nano fiber has extremely high specific surface area and thus has extremely high surface adsorption performance; on the other hand, webs, films or nonwovens made of extremely fine nanofibers have extremely small pore sizes and extremely high porosities (low air resistance) and electrostatic retentivity, and thus have wide applications in the fields of surface adsorption, filtration and separation, such as filtration and separation of gases and liquids. The composite filter material prepared by compounding the nano fibers and the non-woven filter material base material has better filtering efficiency, wherein the non-woven filter material base material mainly filters particles with larger particle size, and the electrostatic spinning fiber layer mainly filters particles with smaller particle size.
For example, the prior art discloses a nanofiber/glass fiber composite filter material, which deposits nanofibers on a glass fiber filter material substrate by an electrostatic spinning technology, and the composite filter material integrates the advantages of glass fibers and nanofibers, and has the advantages of high strength, high precision and good filter effect. However, since the glass fiber is an inorganic material and the nanofiber is usually an organic polymer material, and the compatibility between the glass fiber and the nanofiber is poor, the bonding force between the nanofiber layer and the glass fiber layer of the composite filter material is not strong, and the nanofiber layer and the glass fiber layer are easy to fall off after long-term use, so that the filtering performance of the composite filter material is unstable, and the service life of the composite filter material is influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the filtering performance of the existing nanofiber/glass fiber composite filtering material is unstable due to weak bonding force between the nanofibers and the glass fiber layer, so that the nanofiber/glass fiber composite filtering material is provided. Meanwhile, the invention also provides a preparation method and application of the nanofiber/glass fiber composite filter material.
In order to solve the technical problem, the invention provides a nanofiber/glass fiber composite filter material which comprises a nanofiber layer and a glass fiber layer, wherein a synthetic fiber layer is arranged between the nanofiber layer and the glass fiber layer.
Further, the glass fiber layer has a fiber diameter of 0.5-5 μm and a gram weight of 10-100 g/m2The glass fiber filter paper layer of (a); the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 100-200 nm, and the synthetic fiber layer is a nanofiber filter membrane layer with the fiber diameter of 10-120 mu m and the gram weight of 15-60 g/m2The nonwoven fabric layer of (2).
Further, a protective layer is arranged on the surface of the glass fiber layer and/or the nanofiber layer.
The invention also provides a preparation method of the nanofiber/glass fiber composite filter material, which comprises the following steps:
preparing a polymer spinning solution for forming a nanofiber layer, and spinning the polymer spinning solution on one side of the synthetic fiber layer to form the nanofiber layer;
before or after the nanofiber layer is formed, a glass fiber layer is compounded on the other side of the synthetic fiber layer away from the nanofiber layer.
Further, the spinning polymer is dissolved in an organic solvent to obtain the polymer spinning solution.
Still further, the spinning polymer is at least one selected from polyacrylonitrile, polyurethane, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyvinylpyrrolidone, polyvinylidene fluoride, polyamide-6, polyaniline, polyethylene oxide, polystyrene, polymethyl methacrylate, polycaprolactone, polycaprolactam and chitosan.
Still further, the organic solvent is at least one selected from the group consisting of N, N dimethylformamide, N dimethylacetamide, dimethylsulfoxide, acetone, tetrahydrofuran, dichloromethane, chloroform, hexafluoroisopropanol, formic acid, acetic acid, and ethanol.
Further, the mass fraction of the polymer spinning solution is 8-15%.
Further, the spinning voltage is 15-48 kv.
Further, the method also comprises the step of drying the spinning polymer before dissolving the spinning polymer in the solvent.
Further, the preparation method of the glass fiber filter paper comprises the following steps:
the mass ratio is (90-100): (0-10) dispersing the microfiber glass wool and the glass fiber chopped strands in water, and adjusting the pH of the system to 3-4 to obtain uniformly dispersed glass fiber slurry;
and deslagging, diluting, molding, dehydrating and drying the glass fiber slurry to obtain the glass fiber filter paper.
Further, the mass fraction of the glass fiber slurry is 1-2%.
And further, deslagging and diluting the glass fiber slurry to obtain a product with the mass fraction of 0.25-0.5%.
Further, the method also comprises the step of arranging a protective layer on the surface of the nanofiber layer and/or the glass fiber layer.
Further, the material of the protective layer is selected from at least one of non-woven fabrics, plastic nets and plant fiber filter paper.
The invention also provides the application of the nanofiber/glass fiber composite filter material or the nanofiber/glass fiber composite filter material prepared by the preparation method in liquid and/or gas filtration.
The technical scheme of the invention has the following advantages:
1. the invention provides a nanofiber/glass fiber composite filter material, which comprises a nanofiber layer and a glass fiber layer, wherein a synthetic fiber layer is arranged between the nanofiber layer and the glass fiber layer. The nanofiber/glass fiber composite filter material has a sandwich structure, and the structure enables the whole composite filter material to have the characteristic of combining surface filtration and deep filtration, so that the composite filter material has the advantages of high precision, high pollutant carrying capacity and stability.
The nanofiber/glass fiber composite filter material provided by the invention has high filtering efficiency, low filtering resistance and long service life, and has wide application value in the field of gas and liquid filtering separation.
2. According to the nanofiber/glass fiber composite filter material provided by the invention, the surface of the glass fiber layer and/or the nanofiber layer is/are also provided with the protective layer, so that the erosion wear performance of the composite filter material is improved, and the service life of the composite filter material is prolonged; in addition, the surface of the nanofiber filter membrane layer is provided with the protective layer, so that the nanofiber membrane is prevented from being directly contacted with the external environment, the attenuation of an electret effect can be reduced, the charge storage stability of the composite filter material is improved, and the filter effect of the composite filter material is favorably stabilized.
3. According to the preparation method of the nanofiber/glass fiber composite filter material, the nanofiber layer is formed on one side surface of the synthetic fiber layer through an electrostatic spinning technology, and the glass fiber layer is compounded on the other side surface of the synthetic fiber layer far away from the nanofiber layer before or after the nanofiber layer is formed, so that the nanofiber/glass fiber composite filter material is obtained. According to the invention, the nano-fiber filter membrane with high softness and fine fiber diameter and the composite glass fiber filter paper are deposited on the synthetic fiber to form the composite filter material with a secondary structure, the glass fiber filter paper with coarse fiber diameter has a good filtering effect on particles with larger particle size, and simultaneously forms a larger pore size structure to facilitate smooth passing of air flow or liquid flow, and the nano-fiber filter membrane with fine fiber diameter has excellent filtering performance on ultrafine particles and is softer, so that the air flow or liquid flow cannot generate a blocking effect when passing through, and thus resistance pressure drop cannot be increased.
4. The preparation method of the nanofiber/glass fiber composite filter material provided by the invention has the advantages that the deslagging and dilution treatment are carried out on the glass fiber slurry before the glass fiber filter paper is formed, and the favorable conditions are provided for the subsequent uniform forming.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a nanofiber/glass fiber composite filter material in example 1 of the present invention.
Reference numerals:
1-a nanofiber layer; 2-a synthetic fiber layer; 3-glass fiber layer.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
As shown in fig. 1, the present embodiment provides a nanofiber/glass fiber composite filter material, which includes, from top to bottom, a nanofiber layer, a synthetic fiber layer, and a glass fiber layer. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 100 nm; the synthetic fiber layer has a fiber diameter of 10 μm,gram weight 15g/m2The non-woven fabric layer of (4); the glass fiber layer has a fiber diameter of 0.5 μm and a gram weight of 10g/m2The glass fiber filter paper layer. The preparation method comprises the following steps:
(1) putting polyacrylonitrile powder in a vacuum drying oven, and vacuum-drying at 70 deg.C for 10 hr;
(2) dissolving the dried polyacrylonitrile powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyacrylonitrile low-concentration solution with the mass fraction of 8%, wherein the uniform polyacrylonitrile low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 48kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the perfusion speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by a non-woven fabric made of polypropylene materials, and a nanofiber/non-woven fabric composite material with electrostatic spinning polymer nanofibers uniformly deposited on the non-woven fabric is obtained;
(4) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 5 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 2 wt% and the pH value of 3;
(5) carrying out deslagging and diluting treatment on the glass fiber slurry to obtain a suspension with the concentration of 0.25 wt%, forming and dehydrating the suspension by using a fourdrinier to form a glass fiber wet paper sheet, and drying to obtain glass fiber filter paper;
(6) and (4) taking the non-woven fabric surface of the nanofiber/non-woven fabric composite material obtained in the step (3) as a composite surface, and carrying out glue spraying and compounding on the non-woven fabric surface and the glass fiber filter paper obtained in the step (5) to obtain the nanofiber/glass fiber composite filter material.
Example 2
The embodiment provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer, a synthetic fiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 200 nm; the synthetic fiber layer has a fiber diameter of 120 μm and a gram weight of 60g/m2The non-woven fabric layer of (4); the glass fiber layer has a fiber diameter of 5 μm and a gram weight of 100g/m2The glass fiber filter paper layer. The preparation method comprises the following steps:
(1) placing polyvinylidene fluoride powder in a vacuum drying oven, and vacuum-drying at 70 ℃ for 10 hours;
(2) dissolving the dried polyvinylidene fluoride powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyvinylidene fluoride low-concentration solution with the mass fraction of 15%, wherein the uniform polyvinylidene fluoride low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 15kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the filling speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by a non-woven fabric of a polyester material to obtain a nanofiber/non-woven fabric composite material with the electrostatic spinning polymer nanofiber uniformly deposited on the non-woven fabric;
(4) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 10 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.5 wt% and the pH value of 3.2;
(5) carrying out deslagging and diluting treatment on the glass fiber slurry to obtain a suspension with the concentration of 0.45 wt%, forming and dehydrating the suspension by using a fourdrinier to form a glass fiber wet paper sheet, and drying to obtain glass fiber filter paper;
(6) and (4) taking the non-woven fabric surface of the nanofiber/non-woven fabric composite material obtained in the step (3) as a composite surface, and carrying out glue spraying and compounding on the non-woven fabric surface and the glass fiber filter paper obtained in the step (5) to obtain the nanofiber/glass fiber composite filter material.
Example 3
The embodiment provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer, a synthetic fiber layer, a glass fiber layer and a protective layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 150 nm; the synthetic fiber layer has a fiber diameter of 60 μm and a gram weight of 20g/m2The non-woven fabric layer of (4); the glass fiber layer has a fiber diameter of 0.8 μm and a gram weight of 20g/m2The glass fiber filter paper layer of (a); the protective layer is a tea filter paper layer. The preparation method comprises the following steps:
(1) putting polysulfone powder into a vacuum drying oven, and vacuum-drying for 10 hours at 70 ℃;
(2) dissolving the dried polysulfone powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polysulfone low-concentration solution with the mass fraction of 10 percent, wherein the uniform polysulfone low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 20kv, the temperature of the spinning environment is 20 ℃, the relative humidity is 35%, and the perfusion speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by a non-woven fabric of a polyester material to obtain a nanofiber/non-woven fabric composite material with the electrostatic spinning polymer nanofiber uniformly deposited on the non-woven fabric;
(4) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 10 microns are mixed according to a mass ratio of 95: 5, adding water and dilute sulfuric acid after mixing, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.0 wt% and the pH value of 3.0;
(5) removing slag from the glass fiber pulp, diluting to obtain a suspension with the concentration of 0.35 wt%, forming and dehydrating the suspension by a fourdrinier to form a wet glass fiber paper sheet, drying to obtain glass fiber filter paper, and compounding the glass fiber filter paper with tea filter paper in a hot-pressing compounding manner to obtain a glass fiber/tea filter paper composite material;
(6) and (4) taking the non-woven fabric surface of the nanofiber/non-woven fabric composite material obtained in the step (3) as a composite surface, and spraying glue on and compounding the non-woven fabric surface with the glass fiber filter paper layer of the glass fiber/tea filter paper composite material obtained in the step (5) to obtain the nanofiber/glass fiber composite filter material.
Example 4
The embodiment provides a nanofiber/glass fiber composite filter material, which sequentially comprises a protective layer 1, a nanofiber layer and a synthetic fiber from top to bottomA fiber layer, a glass fiber layer and a protective layer 2. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 120 nm; the glass fiber layer has a fiber diameter of 1 μm and a gram weight of 30g/m2The glass fiber filter paper layer of (a); the protective layers 1, 2 and the synthetic fiber layer have a fiber diameter of 50 μm and a grammage of 26g/m2The nonwoven fabric layer of (2). The preparation method comprises the following steps:
(1) placing polyvinylidene fluoride powder in a vacuum drying oven, and vacuum-drying at 70 ℃ for 10 hours;
(2) dissolving the dried polyvinylidene fluoride powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyvinylidene fluoride low-concentration solution with the mass fraction of 15%, wherein the uniform polyvinylidene fluoride low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage of 15kv spinning environment temperature is 35 ℃, the relative humidity is 25%, and the filling speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by a non-woven fabric of a polyester material, and a non-woven fabric layer is covered by a polymer nanofiber filter membrane layer as a protective layer while receiving, so that a non-woven fabric/nanofiber/non-woven fabric composite material is obtained;
(4) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 6 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.5 wt% and the pH value of 3.2;
(5) removing slag from the glass fiber slurry, diluting to obtain a suspension with the concentration of 0.45 wt%, forming and dehydrating the suspension by a fourdrinier to form a wet glass fiber sheet, drying to obtain glass fiber filter paper, and compounding non-woven fabrics on the glass fiber filter paper in a hot-pressing compounding manner to obtain a glass fiber/non-woven fabrics composite material;
(6) and (4) taking the non-woven fabric surface of the non-woven fabric/nano-fiber/non-woven fabric composite material obtained in the step (3) as a composite surface, and carrying out glue spraying and compounding on the non-woven fabric surface and the glass fiber filter paper layer of the glass fiber/non-woven fabric composite material obtained in the step (5) to obtain the nano-fiber/glass fiber composite filter material.
Example 5
The embodiment provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer, a synthetic fiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 200 nm; the synthetic fiber layer has a fiber diameter of 15 μm and a gram weight of 18g/m2The non-woven fabric layer of (4); the glass fiber layer has a fiber diameter of 4 μm and a gram weight of 29g/m2A glass fiber filter paper layer (available from medium technologies, inc.). The preparation method comprises the following steps:
(1) putting polyacrylonitrile powder in a vacuum drying oven, and vacuum-drying at 70 deg.C for 10 hr;
(2) dissolving the dried polyacrylonitrile powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyacrylonitrile low-concentration solution with the mass fraction of 8%, wherein the uniform polyacrylonitrile low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 48kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the perfusion speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by a non-woven fabric made of polypropylene materials, and a nanofiber/non-woven fabric composite material with electrostatic spinning polymer nanofibers uniformly deposited on the non-woven fabric is obtained;
(5) and (4) taking the non-woven fabric surface of the nanofiber/non-woven fabric composite material obtained in the step (3) as a composite surface, and carrying out glue spraying and compounding with commercially available glass fiber filter paper to obtain the nanofiber/glass fiber composite filter material.
Example 6
The embodiment provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer, a synthetic fiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 200 nm; the synthetic fiber layer has a fiber diameter of 110 μm and a gram weight of 35g/m2The non-woven fabric layer of (4); the glass fiber layer has a fiber diameter of 5 μm and a gram weight of 40g/m2The glass fiber filter paper layer.
The preparation method comprises the following steps:
(1) adding water and dilute sulfuric acid into microfiber glass wool with a beating degree of 38 degrees, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with a concentration of 2 wt% and a pH value of 4;
(2) removing slag and diluting the glass fiber slurry to obtain a suspension with the concentration of 0.5 wt%, forming and dehydrating the suspension by a fourdrinier to form a glass fiber wet paper sheet, drying to obtain glass fiber filter paper, and compounding non-woven fabrics of viscose fiber materials on the glass fiber filter paper in a hot-pressing compounding manner to obtain a glass fiber/non-woven fabrics composite material;
(3) placing chitosan powder in a vacuum drying oven, and vacuum drying at 70 deg.C for 10 hr;
(4) dissolving the dried chitosan powder in a formic acid solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform chitosan low-concentration solution with the mass fraction of 10 percent, wherein the uniform chitosan low-concentration solution is used as a polymer spinning solution;
(5) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 20kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the perfusion speed of the spinning solution is 6 mL/h; and (3) receiving the spun polymer nanofiber by using a non-woven fabric layer of the glass fiber/non-woven fabric composite material to obtain the nanofiber/glass fiber composite filter material.
Comparative example 1
The comparative example provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 100 nm; the glass fiber layer has a fiber diameter of 0.5 μm and a gram weight of 10g/m2The glass fiber filter paper layer.
The preparation method comprises the following steps:
(1) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 5 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 2 wt% and the pH value of 3;
(2) carrying out deslagging and diluting treatment on the glass fiber slurry to obtain a suspension with the concentration of 0.25 wt%, forming and dehydrating the suspension by using a fourdrinier to form a glass fiber wet paper sheet, and drying to obtain glass fiber filter paper;
(3) putting polyacrylonitrile powder in a vacuum drying oven, and vacuum-drying at 70 deg.C for 10 hr;
(4) dissolving the dried polyacrylonitrile powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyacrylonitrile low-concentration solution with the mass fraction of 8%, wherein the uniform polyacrylonitrile low-concentration solution is used as a polymer spinning solution;
(5) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 48kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the perfusion speed of the spinning solution is 6 mL/h; and (3) receiving the spun polymer nanofiber by using the glass fiber filter paper prepared in the step (2) to obtain the nanofiber/glass fiber filter paper composite filter material with the electrospun polymer nanofiber uniformly deposited on the glass fiber filter paper.
Comparative example 2
The comparative example provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 200 nm; the glass fiber layer has a fiber diameter of 5 μm and a gram weight of 100g/m2The glass fiber filter paper layer.
The preparation method comprises the following steps:
(1) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 10 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.5 wt% and the pH value of 3.2;
(2) carrying out deslagging and diluting treatment on the glass fiber slurry to obtain a suspension with the concentration of 0.45 wt%, forming and dehydrating the suspension by using a fourdrinier to form a glass fiber wet paper sheet, and drying to obtain glass fiber filter paper;
(3) placing polyvinylidene fluoride powder in a vacuum drying oven, and vacuum-drying at 70 ℃ for 10 hours;
(4) dissolving the dried polyvinylidene fluoride powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyvinylidene fluoride low-concentration solution with the mass fraction of 15%, wherein the uniform polyvinylidene fluoride low-concentration solution is used as a polymer spinning solution;
(5) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 15kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the filling speed of the spinning solution is 6 mL/h; and (3) receiving the spun polymer nanofiber by using the glass fiber filter paper prepared in the step (2) to obtain the nanofiber/glass fiber filter paper composite filter material with the electrospun polymer nanofiber uniformly deposited on the glass fiber filter paper.
Comparative example 3
The comparative example provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer, a glass fiber layer and a protective layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 150 nm; the glass fiber layer has a fiber diameter of 0.8 μm and a gram weight of 20g/m2The glass fiber filter paper layer of (a); the protective layer is a tea filter paper layer. The preparation method comprises the following steps:
(1) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 10 microns are mixed according to a mass ratio of 95: 5, adding water and dilute sulfuric acid after mixing, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.0 wt% and the pH value of 3.0;
(2) removing slag from the glass fiber pulp, diluting to obtain a suspension with the concentration of 0.35 wt%, forming and dehydrating the suspension by a fourdrinier to form a wet glass fiber paper sheet, drying to obtain glass fiber filter paper, and compounding the glass fiber filter paper with tea filter paper in a hot-pressing compounding manner to obtain a glass fiber/tea filter paper composite material;
(3) putting polysulfone powder into a vacuum drying oven, and vacuum-drying for 10 hours at 70 ℃;
(4) dissolving the dried polysulfone powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polysulfone low-concentration solution with the mass fraction of 10 percent, wherein the uniform polysulfone low-concentration solution is used as a polymer spinning solution;
(5) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 20kv, the temperature of the spinning environment is 20 ℃, the relative humidity is 35%, and the perfusion speed of the spinning solution is 6 mL/h; and (3) receiving the spun polymer nanofiber by using the glass fiber filter paper layer of the glass fiber/tea filter paper composite material prepared in the step (2), and obtaining the nanofiber/glass fiber filter paper composite filter material with the electrostatic spinning polymer nanofiber uniformly deposited on the glass fiber filter paper.
Comparative example 4
The comparative example provides a nanofiber/glass fiber composite filter material which sequentially comprises a protective layer 1, a nanofiber layer, a glass fiber layer and a protective layer 2 from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 120 nm; the glass fiber layer has a fiber diameter of 1 μm and a gram weight of 30g/m2The glass fiber filter paper layer of (a); the protective layers 1 and 2 have a fiber diameter of 50 μm and a grammage of 26g/m2The nonwoven fabric layer of (2). The preparation method comprises the following steps:
(1) microfiber glass wool with a beating degree of 38 degrees and glass fiber chopped yarns with a length of 6 microns are mixed according to a mass ratio of 90: 10 mixing, adding water and dilute sulfuric acid, and uniformly stirring by a high-frequency fluffer to obtain glass fiber slurry with the concentration of 1.5 wt% and the pH value of 3.2;
(2) removing slag from the glass fiber slurry, diluting to obtain a suspension with the concentration of 0.45 wt%, forming and dehydrating the suspension by a fourdrinier to form a wet glass fiber sheet, drying to obtain glass fiber filter paper, and compounding non-woven fabrics on the glass fiber filter paper in a hot-pressing compounding manner to obtain a glass fiber/non-woven fabrics composite material;
(3) placing polyvinylidene fluoride powder in a vacuum drying oven, and vacuum-drying at 70 ℃ for 10 hours;
(4) dissolving the dried polyvinylidene fluoride powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyvinylidene fluoride low-concentration solution with the mass fraction of 15%, wherein the uniform polyvinylidene fluoride low-concentration solution is used as a polymer spinning solution;
(5) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 15kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the filling speed of the spinning solution is 6 mL/h; and (3) receiving the spun polymer nanofiber by using the glass fiber filter paper layer of the glass fiber/non-woven fabric composite material prepared in the step (2), and obtaining the nanofiber/glass fiber filter paper composite filter material with the electrostatic spinning polymer nanofiber uniformly deposited on the glass fiber filter paper.
Comparative example 5
The comparative example provides a nanofiber/glass fiber composite filter material which sequentially comprises a nanofiber layer and a glass fiber layer from top to bottom. Wherein the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 200 nm; the glass fiber layer has a fiber diameter of 4 μm and a gram weight of 29g/m2A glass fiber filter paper layer (available from medium technologies, inc.). The preparation method comprises the following steps:
(1) putting polyacrylonitrile powder in a vacuum drying oven, and vacuum-drying at 70 deg.C for 10 hr;
(2) dissolving the dried polyacrylonitrile powder in an N, N-dimethylformamide solvent, and then placing the mixed solution on a magnetic stirrer to stir for 10 hours to form a uniform polyacrylonitrile low-concentration solution with the mass fraction of 8%, wherein the uniform polyacrylonitrile low-concentration solution is used as a polymer spinning solution;
(3) and (2) carrying out electrostatic spinning on the polymer spinning solution, wherein the process conditions of the electrostatic spinning are as follows: the power voltage is 48kv, the temperature of the spinning environment is 35 ℃, the relative humidity is 25%, and the perfusion speed of the spinning solution is 6 mL/h; the spun polymer nanofiber is received by commercially available glass fiber filter paper, and the nanofiber/glass fiber composite filter material with the electrostatic spinning polymer nanofiber uniformly deposited on the glass fiber filter paper is obtained.
Examples of the experiments
The nanofiber/glass fiber filter paper composite filter materials of examples 1 to 5 and comparative examples 1 to 4 of the present invention were subjected to air filtration efficiency, filtration resistance, liquid filtration accuracy and peel strength, respectively. The test method specifically comprises the following steps:
the air filtration efficiency and the filtration resistance are measured by an American TSI 8130 automatic filter material detector according to the regulations of GB/T19083-.
The liquid filtration efficiency was determined as specified in EN 13443-2-2007 mechanical filters for water conditioning plants in buildings, part 2, particle rating 1 μm to 80 μm (80 μm excluded), Performance, safety and test requirements.
The peel strength was measured according to the regulations of GB/T34444-2017 "measurement of peel strength between paper and paperboard layers".
The test results are shown in table 1 below.
TABLE 1 results of testing the properties of different composite filter materials
Figure BDA0002414937870000171
Figure BDA0002414937870000181
The comparison of the data in the table shows that compared with the existing composite filter material, the peel strength of the composite filter material is obviously improved, and the composite filter material has high filtering efficiency and small filtering resistance, and can be applied to the filtration of gas and liquid.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (7)

1. A nanofiber/glass fiber composite filter material comprises a nanofiber layer and a glass fiber layer, and is characterized in that a non-woven fabric layer is arranged between the nanofiber layer and the glass fiber layer;
the preparation method of the nanofiber/glass fiber composite filter material comprises the following steps:
preparing a polymer spinning solution for forming a nanofiber layer, and spinning the polymer spinning solution on one side surface of the non-woven fabric layer to form the nanofiber layer;
after the nanofiber layer is formed, compounding a glass fiber layer on the other side of the non-woven fabric layer away from the nanofiber layer;
the preparation method of the glass fiber filter paper comprises the following steps:
the mass ratio is (90-100): (0-10) dispersing the microfiber glass wool and the glass fiber chopped strands in water, and adjusting the pH of the system to 3-4 to obtain uniformly dispersed glass fiber slurry;
and deslagging, diluting, molding, dehydrating and drying the glass fiber slurry to obtain the glass fiber filter paper.
2. The nanofiber/glass fiber composite filter material as claimed in claim 1, wherein the glass fiber layer has a fiber diameter of 0.5-5 μm and a gram weight of 10-100 g/m2The glass fiber filter paper layer of (a); the nanofiber layer is a nanofiber filter membrane layer with the fiber diameter of 100-200 nm, the fiber diameter of the non-woven fabric layer is 10-120 mu m, and the gram weight of the non-woven fabric layer is 15-60 g/m2。
3. The nanofiber/glass fiber composite filter material according to any one of claims 1 to 2, wherein a protective layer is further provided on the surface of the glass fiber layer and/or the nanofiber layer.
4. The nanofiber/glass fiber composite filter material of claim 1, wherein a spinning polymer is dissolved in an organic solvent to obtain the polymer spinning solution;
the spinning polymer is selected from at least one of polyacrylonitrile, polyurethane, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyvinylpyrrolidone, polyvinylidene fluoride, polyamide-6, polyaniline, polyethylene oxide, polystyrene, polymethyl methacrylate, polycaprolactone, polycaprolactam and chitosan;
the organic solvent is at least one selected from N, N dimethylformamide, N dimethylacetamide, dimethyl sulfoxide, acetone, tetrahydrofuran, dichloromethane, trichloromethane, hexafluoroisopropanol, formic acid, acetic acid and ethanol.
5. The nanofiber/glass fiber composite filter material of claim 1, further comprising a step of providing a protective layer on the surface of the nanofiber layer and/or the glass fiber layer.
6. The nanofiber/glass fiber composite filter material of claim 5, wherein the material of the protective layer is at least one selected from the group consisting of non-woven fabric, plastic net, and plant fiber filter paper.
7. Use of the nanofiber/glass fiber composite filter material as claimed in any one of claims 1 to 6 for liquid and/or gas filtration.
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