CN112337192A - Efficient filtering material containing foaming coating and preparation method and application thereof - Google Patents

Efficient filtering material containing foaming coating and preparation method and application thereof Download PDF

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Publication number
CN112337192A
CN112337192A CN202011143881.4A CN202011143881A CN112337192A CN 112337192 A CN112337192 A CN 112337192A CN 202011143881 A CN202011143881 A CN 202011143881A CN 112337192 A CN112337192 A CN 112337192A
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China
Prior art keywords
coating
electret
parts
nano
agent
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CN202011143881.4A
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Chinese (zh)
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CN112337192B (en
Inventor
丁其军
赵传山
陈立栋
李霞
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Shuxin Technology Co Ltd
Qilu University of Technology
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Shuxin Technology Co Ltd
Qilu University of Technology
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Publication of CN112337192A publication Critical patent/CN112337192A/en
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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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/121—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/25—Cellulose
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/35—Polyalkenes, e.g. polystyrene
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
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    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
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    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
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    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
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    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
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    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
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    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/08—Filter paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
    • D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/30—Filters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Filtering Materials (AREA)

Abstract

The invention discloses a high-efficiency filter material containing a foaming coating, a preparation method and application thereof, wherein the coating is prepared from a coating A and a coating B, and the coating A and the coating B are sequentially coated on a porous substrate material; the coating A comprises 100 parts of a micrometer electret suspension and 3-10 parts of an adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent; the coating B comprises 100 parts of nano electret suspension and 1-10 parts of adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of a foaming agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent. The invention develops a coating with high-efficiency filtering performance by taking a degradable material as a base material, and has lower breathing resistance. The coating is coated on a non-woven fabric substrate material to prepare a filter material, so that the using amount of the melt-blown fabric is greatly reduced.

Description

Efficient filtering material containing foaming coating and preparation method and application thereof
Technical Field
The invention belongs to the technical field of filter materials, and particularly relates to a filter material containing a foaming coating, and a preparation method and application thereof.
Background
The main body filtering material of the mask is polypropylene melt-blown cloth, which is superfine electrostatic fiber cloth, dust can be captured due to electrostatic action, and spray containing various viruses can be adsorbed on the surface of the melt-blown cloth and cannot penetrate after approaching the polypropylene melt-blown cloth. The higher the gram weight of the melt-blown fabric is, the better the protection and filtration effect is, and the more excessive the melt-blown layer is, the more difficult the breathing is.
The electret material is added to improve the electret performance of the filter material, so that the electrostatic adsorption capacity is improved, and the filter efficiency is improved. Chinese patent document CN105920919A (201610329607.3) discloses a method for preparing and activating a superhydrophobic electret filter material for purifying PM 2.5. Adding the inorganic electret nano particles into a solvent for uniform dispersion, adding a polymer into the solvent, and stirring and dissolving the polymer uniformly to obtain a polymer solution containing the inorganic electret nano particles; preparing the solution on a non-woven fabric through electrostatic spinning to obtain an electret nanofiber layer; and then carrying out surface modification on the surface of the fiber layer by using a low surface energy solution to obtain a product. The obtained filter material has a super-hydrophobic effect, a large surface potential and the advantages of inhibiting the growth of microorganisms, bacteria and the like on the surface of the filter material. However, in the method, electret nano particles are added to realize the electret performance of the material, so that the electrostatic filtering efficiency of the material is improved, but the contradiction between the filtering efficiency and the breathing resistance cannot be comprehensively regulated, and the breathing resistance can be improved if the electret performance and the breathing efficiency are increased, so that the electret nano particles cannot be used as air filtering materials such as masks.
Chinese patent document CN 110732186 a (201911016889.1) discloses a porous air filtration membrane and a preparation method and use thereof. The porous air filtering membrane comprises a porous substrate material and a polymer layer with a pyroelectric function, wherein the polymer layer is covered on fibers of the porous substrate material, and the porous substrate material is a needle-punched non-woven fabric. The porous air filtering membrane can retain fine particles which are much smaller than the pores of the porous air filtering membrane, has high dust capacity, high filtering efficiency and low air filtering resistance, and can be regenerated for repeated use. And covering a polymer layer with a pyroelectric function on the fibers of the porous substrate material by using a spraying method, thereby preparing the porous air filtering membrane. Wherein the pyroelectric particles comprise lithium niobate and/or tourmaline; the pyroelectric polymer comprises polyvinylidene fluoride and/or polyamide-11.
However, in the filter material described in the above patent, the pyroelectric material is directly coated on the non-woven fabric, and in order to further improve the filtering efficiency and electret performance of the material, the spraying amount of the pyroelectric polymer needs to be increased, and the breathing resistance of the material must be greatly increased.
Disclosure of Invention
The invention aims to solve the problems that the filtering material in the prior art can not be electret, the filtering efficiency of the modified material is low, the air resistance is large and the like. Provides a high-efficiency filter material containing a foaming coating, a preparation method and application thereof. According to the invention, the composite foaming coating is coated on the surface of the porous substrate material, so that the filter material which is high in filter efficiency, small in breathing resistance and capable of being electret is obtained. The contradiction between the filtration efficiency and the respiratory resistance can be comprehensively regulated and controlled by adjusting the consumption of the foaming agent and the nano-fiber, and the air filtration material with high filtration efficiency and small respiratory resistance is obtained.
In order to achieve the purpose, the invention adopts the following technical scheme:
a foaming coating paint is characterized by comprising a paint A and a paint B, wherein the paint A and the paint B are sequentially coated on a porous substrate material;
the coating A comprises 100 parts of a micrometer electret suspension and 3-10 parts of an adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent; the coating B comprises 100 parts of nano electret suspension and 1-10 parts of adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of a foaming agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent.
Preferably, the coating A comprises 3-8 parts of adhesive, 1 part of wetting agent, 1 part of dispersing agent, 2-5 parts of nano cellulose and 1 part of antibacterial agent; the coating B comprises 5-8 parts of adhesive, 1 part of wetting agent, 1 part of dispersing agent, 2-3 parts of foaming agent, 2-3 parts of nano cellulose and 1 part of antibacterial agent.
Preferably, the solid content of the micron electret suspension is 10-30%, wherein the solid phase is a micron-grade electret, and the liquid phase is a dispersant aqueous solution with the concentration of 10-30%. The solid content is further preferably 19 to 21%.
Further preferably, the micron-sized electret includes one or more of tourmaline powder, silicon nitride, electrode powder, carnauba wax and the like. The average particle size of the micron-sized electret is 30-80 μm. More preferably, the tourmaline powder and the silicon nitride are 50-80 μm, and the average particle size of the electrode powder and the carnauba wax is 30-50 μm.
Further preferably, the micron-sized electret is prepared by mixing the following components in a mass ratio of 11-13: 7-9: 0.8-1.2: 3.5-4.5 of tourmaline powder, silicon nitride, electrode powder and carnauba wax. The optimal proportion is determined by the electret charge, electret stability and breathing resistance of the coating, and has a synergistic promotion effect on the electret performance of the material.
Preferably, the solid content of the nano electret suspension in the coating B is 10-20%, wherein the solid phase is the nano electret, and the liquid phase is a dispersant aqueous solution with the mass fraction of 10-20%. Further preferably, the nano-electret is an organic electret material.
Preferably, the nanoscale electret comprises polytetrafluoroethylene, polycarbonate and polymethyl methacrylate with the mass ratio of 4.8-5.2: 1.8-2.2, and the purpose of compounding is to further optimize the electret performance. The average particle size of the nano-grade electret is 50-90 nm.
Preferably, the adhesive is one of common adhesives such as polyvinyl alcohol, carboxymethyl cellulose and starch.
Preferably, the wetting agent, the dispersing agent and the antibacterial agent are functional auxiliaries commonly used in the field of coatings; further preferably, the wetting agent is glycerol, the dispersing agent is sodium hexametaphosphate, and the antibacterial agent is chitosan.
Preferably, the blowing agent is a commercially available blowing agent commonly used in the art.
Preferably, the nanocellulose in the coating A and the coating B is nanocellulose produced by a physical or chemical method. The length of the nano-cellulose is 100-500 nm, and the diameter is 10-30 nm. Nanocellulose is used to adjust the pore size of the foamed coating. The nano-cellulose is used for filling small pores, and the air resistance of the material is changed by changing the addition amount.
In order to obtain the coating of the foaming coating, the invention also provides a preparation method of the foaming coating, which is characterized in that the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water is uniformly mixed with a dispersing agent, a micron-sized electret is added, then the rest water is added, and the micron-sized electret suspension is uniformly dispersed to obtain a micron-sized electret suspension, wherein the concentration of the dispersing agent is 10-30%, and the solid content is 10-30%; adding an adhesive, a wetting agent, a dispersing agent, nano-cellulose and an antibacterial agent according to the proportion; thus, dope A was obtained.
The preparation method of the coating B comprises the following steps: uniformly mixing 3/4 of the total amount of the required water and the required dispersant, adding the nano electret, then adding the residual water to uniformly disperse the dispersion liquid to obtain a nano electret suspension, wherein the concentration of the dispersant is 10-20%, and the solid content is 10-20%; adding an adhesive, a wetting agent, a dispersing agent, a foaming agent, nano-cellulose and an antibacterial agent according to the proportion; thus, dope B was obtained.
Preferably, the dispersion method of the micro-scale electret and the nano-scale electret in the water solution is ultrasonic dispersion, and the ultrasonic time is 20-40 min, preferably 25-35 min.
The invention also provides a using method of the foaming coating, which is characterized in that the coating A is coated on the surface of a substrate, a first coating is obtained by heating and drying, the heating temperature is 100-120 ℃, the time is 5-10 min, and the coating weight is 5-10 g/m2(ii) a Coating the coating B on the surface of the first coating, heating and drying to obtain a second coating, wherein the temperature is 80-125 ℃, the time is 5-12 min, and the coating weight is 5-12 g/m2。
Preferably, the substrate is a porous substrate material. Further preferably, the porous base material includes paper, nonwoven fabric, porous membrane; the non-woven fabric comprises spunlace non-woven fabric, heat seal non-woven fabric, pulp air-laid non-woven fabric and wet non-woven fabric. The paper is porous filter paper prepared by using plant fibers as raw materials, and comprises commercially available mask paper or tea bag paper which uses the plant fibers as raw materials.
Preferably, the coating mode comprises one of bar coating, roll coating and blade coating.
Preferably, the drying temperature of the first coating is 108-112 ℃; the drying time is 5.5-6.5 min; the coating weight is 7.5-8.5 g/m2(ii) a The drying temperature of the second coating is 118-122 ℃; the drying time is 9.5-10.5 min; the coating weight is 9.5-10.5 g/m2。
The invention also provides a high-efficiency filter material containing the foaming coating, which is characterized in that the filter material consists of the foaming coating and a porous substrate material, and a first coating formed by the coating A and a second coating formed by the coating B are sequentially coated on the surface of the porous substrate material; the coating weight of the first coating and the second coating is 5-10 g/m2And 5 to 12g/m2。
According to the invention, the pores are adjusted by the nanocellulose and the foaming agent together, the foaming agent can enlarge the pores of the coating, the filtering efficiency is reduced, and the air resistance is reduced; and the air resistance and the filtration efficiency can be further adjusted by adjusting the addition of the nano-cellulose, so that the filtration efficiency is improved. Therefore, the filter material has lower breathing resistance on the premise of higher electret back charge and filter efficiency.
The invention discloses a method for filling large pores of a base material by coating two layers of coatings on porous materials such as paper, wherein the first layer of micron-sized coating is used for filling large pores of the base material and keeping small pores, and the first layer of micron-sized coating is similar to a road-building stone-filling structure; the second layer of nano-scale coating is a foaming coating and is used for plugging smaller pores, and the addition amounts of the foaming agent and the nano-cellulose are used for adjusting the pore structure of the coating, so that the filtering efficiency and the air resistance are further adjusted.
In order to obtain the filter material, the present invention also provides a method for producing a filter material, characterized in that the coating material A, B is applied to the surface of the porous base material in sequence according to the method for using the foamed coating material.
Specifically, the specific preparation method of the filter material comprises the following steps:
(1) the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water is uniformly mixed with a dispersing agent, a micron-sized electret is added, then the rest water is added, the micron-sized electret suspension is uniformly dispersed to obtain a micron-sized electret suspension, and an adhesive, a wetting agent, a dispersing agent, nano-cellulose and an antibacterial agent are added according to the proportion to obtain a coating A;
(2) the first coating preparation method comprises the following steps: coating the prepared coating A on the surface of a porous substrate material, heating and drying the coating at 100-120 ℃ for 5-10 min, wherein the coating weight is 5-10 g/m2；
(3) The preparation method of the coating B comprises the following steps: uniformly mixing 3/4 of the total amount of the required water with a dispersing agent, adding a nano electret, then adding the residual water to uniformly disperse the dispersion liquid to obtain a nano electret suspension, and adding an adhesive, a wetting agent, a dispersing agent, a foaming agent, nano cellulose and an antibacterial agent according to the proportion to obtain a coating B;
(4) the preparation method of the second coating comprises the following steps: coating the coating B on the surface of the first coating, heating and drying to obtain a second coating, wherein the temperature is 80-125 ℃, the time is 5-12 min, and the coating weight is 5-12 g/m2。
Based on the application of the high-efficiency filter material in filtration and dust removal.
The high-efficiency filter material is applied to masks and filter devices.
A mask is characterized in that the high-efficiency filter material is used as a raw material or a filter material.
A filter device is characterized in that the high-efficiency filter material is used as a filter part.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention utilizes the porous base material as the base material, and solves the key problems of air resistance and filtration efficiency by coating the coating capable of electret and the foaming coating and regulating and controlling the three-dimensional space structure of the coating. The foaming coating and the micron-sized coating are used in a composite mode, dust particles which are much smaller than pores of the foaming coating can be retained, and the dust holding capacity can be improved.
The high-efficiency filter material developed by the invention has high filtering performance (the testing medium is NaCl aerosol with the counting median diameter of 0.075 mu m, and the filtering efficiency can reach 87.5 percent under the testing condition that the testing gas flow is 32L/min), and has low breathing resistance (as low as 111 Pa).
The porous substrate material of the invention uses non-woven fabrics as the substrate material, which greatly reduces the usage amount of melt-blown fabrics. The plant fiber paper is used as a base material, so that the degradation is facilitated, and the secondary pollution is avoided; the mask can avoid secondary pollution caused by medical waste generated by using a large amount of disposable masks, establishes the concepts of green production and environmental protection and carbon reduction, and promotes the sustainable development of the mask industry.
Drawings
FIG. 1 is a scanning electron micrograph of the first and second coatings of example 1, (a) a primary coating; (b) and (5) secondary coating.
FIG. 2 is a schematic structural view of the coating of example 1.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto. The materials referred to in the following examples are commercially available. All substrates in the examples are nonwoven fabrics.
The performance test method comprises the following steps: the prepared sample is subjected to adsorption efficiency and air resistance tests, and the filtration efficiency and the air flow resistance of the sample to particulate matters are tested by referring to the method in GB19083-2003 medical protective mask technical requirement. The testing device adopts an American TSI3160 classification efficiency testing platform, the testing medium is NaCl aerosol with the counting median diameter of 0.075 mu m, and the testing gas flow is 32L/min.
The charge amount was measured by an electric charge meter Elektrofeldmeter, EFM 022.
Nanocellulose includes NFC (nanocellulose) prepared by a chemical mechanical method and NCC (nanocrystalline cellulose) prepared by an acid hydrolysis method, both provided by jeanshan's holy spring.
Example 1
The preparation method of the high-efficiency filter material comprises the following steps:
(1) the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water and a dispersant sodium hexametaphosphate are mixed uniformly, micron-sized electrets (tourmaline powder, silicon nitride, electrode powder and carnauba wax in a mass ratio of 12:8:1:4) are added while stirring, then the rest water is added, stirring is continued, ultrasonic dispersion is carried out for 30min, and the micron-sized electrets are uniformly dispersed to obtain a micron-sized electret suspension liquid, wherein the solid content of the micron-sized electret suspension liquid is 20%, and the mass fraction of the sodium hexametaphosphate is 10%.
Taking 100 parts by weight of micron electret suspension, adding 3 parts of PVA, and while stirring, slowly adding 1 part of glycerol, 1 part of sodium hexametaphosphate, 2 parts of NFC (nano cellulose) and 1 part of chitosan in sequence, wherein each component is added and stirred until the components are uniformly mixed; obtaining a coating A; the average grain diameter of the tourmaline powder and the silicon nitride is 80 μm; the average particle size of the electrode powder and carnauba wax was 30 μm.
(2) The first coating preparation method comprises the following steps: coating the prepared coating A on the surface of the mask paper by using a coating machine rod, heating and drying the coating at 100 ℃ for 5min, wherein the coating weight is 5g/m2；
(3) The preparation method of the coating B comprises the following steps: 3/4 parts of the total amount of the required water and sodium hexametaphosphate as a dispersing agent are mixed uniformly, a nano electret (polytetrafluoroethylene, polycarbonate and polymethyl methacrylate in a mass ratio of 5:5:2) is added, then the rest water is added, stirring is continued, ultrasonic dispersion is carried out for 30min, and the dispersion liquid is dispersed uniformly, so that nano electret suspension is obtained. The solid content of the nano electret suspension is 20%, the mass fraction of sodium hexametaphosphate is 10%, and the average particle size of the nano electret is 90 nm.
According to the weight ratio, 100 parts of nano electret suspension is taken, 5 parts of PVA is added according to the proportion, 1 part of glycerol, 1 part of sodium hexametaphosphate, 2 parts of a commercially available foaming agent, 2 parts of NFC and 1 part of chitosan with required amount are sequentially and slowly added while stirring, and each added component needs to be stirred until being uniformly mixed; obtaining a coating B;
(4) the preparation method of the second coating comprises the following steps: coating the coating B on the surface of the first coating by a coating machine, heating and drying to obtain a second coating, wherein the temperature is 80 ℃, the time is 5min, and the coating weight is 5g/m2。
The obtained sample was found to have a filtration efficiency of 85.2%, an air resistance of 123Pa and an electret charge amount of 1632V.
As can be seen from figures 1 and 2, the surface of the once-coated paper sheet only has micron-sized coating, and still has more pores. After the second coating, the nano-scale coating is filled to reduce the pores on the surface of the paper sheet.
Example 2
The preparation method of the high-efficiency filter material comprises the following steps:
(1) the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water and a dispersant sodium hexametaphosphate are uniformly mixed, micron-sized electrets (tourmaline powder, silicon nitride, electrode powder and carnauba wax in a mass ratio of 12:8:1:4) are added while stirring, then the rest water is added, stirring is continued, ultrasonic dispersion is carried out for 30min, and the micron-sized electret suspension is uniformly dispersed to obtain the micron-sized electret suspension. The solid content of the micron electret suspension is 15%, and the mass fraction of sodium hexametaphosphate in the liquid phase is 20%.
Taking 100 parts of micron electret suspension according to the weight ratio, adding 5 parts of PVA, and slowly adding 1 part of glycerol, 1 part of sodium hexametaphosphate, 3 parts of NFC and 1 part of chitosan in sequence while stirring, wherein each component is added and stirred until the components are uniformly mixed to obtain a coating A;
the average grain diameter of the tourmaline powder and the silicon nitride is 80 μm; the average particle size of the electrode powder and carnauba wax was 30 μm.
(2) The first coating preparation method comprises the following steps: coating the obtained grade coating A material on the surface of non-woven fabric with a coating machine, heating and drying the coating at 110 deg.C for 6min, wherein the coating weight is 8g/m2。
(3) The preparation method of the coating B comprises the following steps: 3/4 parts of the total amount of the required water and sodium hexametaphosphate as a dispersing agent are uniformly mixed, a nano electret (polytetrafluoroethylene, polycarbonate and polymethyl methacrylate in a mass ratio of 5:5:2) is added, then the rest water is added, stirring is continued, and ultrasonic dispersion is carried out for 30min to uniformly disperse the dispersion liquid, so as to obtain the nano electret suspension. The solid content of the nano electret suspension is 15%, the mass fraction of sodium hexametaphosphate in the liquid phase is 15%, and the average particle size is 90 nm.
According to the weight ratio, 100 parts of nano electret suspension is taken, 8 parts of PVA are added according to the proportion, 1 part of glycerol, 1 part of sodium hexametaphosphate, 3 parts of a commercially available foaming agent, 3 parts of NFC and 1 part of chitosan which are required by the weight are sequentially and slowly added while stirring, and each component is added and stirred until the components are uniformly mixed; thus, dope B was obtained.
(4) The preparation method of the second coating comprises the following steps: coating the coating B on the surface of the first coating by a coating machine, heating and drying to obtain a second coating, wherein the temperature is 120 ℃, the time is 10min, and the coating weight is 10g/m2。
The experimental sample measured a filtration efficiency of 87.5%, an air resistance of 111Pa, and a charge amount after electret of 1577V.
Example 3
The preparation method of the high-efficiency filter material comprises the following steps:
(1) the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water and a dispersant sodium hexametaphosphate are mixed uniformly, micron-sized electrets (tourmaline powder, silicon nitride, electrode powder and carnauba wax in a mass ratio of 12:8:1:4) are added while stirring, then the rest water is added, stirring is continued, ultrasonic dispersion is carried out for 30min, and micron-sized electret suspension is obtained after uniform dispersion. The solid content of the micron electret agent body suspension is 20 percent, and the mass fraction of the sodium hexametaphosphate in the liquid phase is 30 percent;
taking 100 parts of micron electret suspension according to the weight ratio, adding 8 parts of adhesive PVA, and slowly adding 1 part of glycerol, 1 part of sodium hexametaphosphate, 1 part of NFC5 and 1 part of chitosan in required amounts while stirring, wherein each component is added and stirred until the components are uniformly mixed to obtain a coating A;
the average grain diameter of the tourmaline powder and the silicon nitride is 80 μm; the average particle size of the electrode powder and carnauba wax was 30 μm.
(2) The first coating preparation method comprises the following steps: coating the obtained coating A on the surface of non-woven fabric with a coating machine, heating and drying the coating at 110 deg.C for 10min, wherein the coating weight is 10g/m2。
(3) The preparation method of the coating B comprises the following steps: 3/4 parts of the total amount of the required water and sodium hexametaphosphate as a dispersing agent are uniformly mixed, a nano electret (polytetrafluoroethylene, polycarbonate and polymethyl methacrylate in a mass ratio of 5:5:2) is added, then the rest water is added, stirring is continued, and ultrasonic dispersion is carried out for 30min to uniformly disperse the dispersion liquid, so as to obtain the nano electret suspension. The solid content of the nano electret suspension is 20%, the mass fraction of sodium hexametaphosphate in the liquid phase is 20%, and the average particle size is 90 nm.
According to the weight ratio, 100 parts of nano electret suspension is taken, 8 parts of adhesive PVA is added according to the proportion, 1 part of glycerol, 1 part of sodium hexametaphosphate, 3 parts of a commercially available foaming agent, 3 parts of NFC and 1 part of chitosan are slowly added in sequence while stirring, and each component is added and stirred until the components are uniformly mixed, so that a coating B is obtained;
(4) the preparation method of the second coating comprises the following steps: coating the coating B on the surface of the first coating by a coating machine, heating and drying to obtain a second coating, wherein the temperature is 125 ℃, the time is 12min, and the coating weight is 12g/m2。
The obtained sample was found to have a filtration efficiency of 86.4%, an air resistance of 118Pa and an electret charge amount of 1605V.
Example 4
Compared with example 2, the micron-sized electret is only one of tourmaline powder, and other conditions are the same as example 2. The filtration efficiency of the obtained filter material was 85%, the air resistance was 126Pa, and the amount of charge after electret was 1503V.
Example 5
The other conditions are the same as example 2, except that the micro-electret is only tourmaline powder, and the nano-electret is only polytetrafluoroethylene. The filtration efficiency of the obtained filter material was 84%, the air resistance was 117Pa, and the amount of charge after electret was 1537V.
Comparative example 1
Compared with the embodiment 2, the difference is that the micron-sized coating is not used, the second foaming coating is directly coated on the surface of the non-woven fabric, and the other conditions are the same as the embodiment 2. The filtration efficiency of the obtained filter material was 98%, the air resistance was 563Pa, and the amount of charge after electret was 1035V. The foaming coating is directly coated on the surface of the non-woven fabric, so that the nanometer electret agent blocks the pores of the non-woven fabric, the air resistance is increased, and the electric charge quantity after electret is reduced to a certain degree by the single nanometer electret coating.
Comparative example 2
The difference compared to example 2 is that the second coating was not provided with a blowing agent, and the other conditions were the same as in example 2. The filtration efficiency of the obtained filter material is 99%, the air resistance is 631Pa, and the charge amount after electret is 1568V. The second coating layer is not added with the foaming agent, so that air channels are not formed in the coating layer, and the nano paint blocks the pores of the first coating layer and the non-woven fabric, thereby increasing the breathing resistance.
Comparative example 3
Compared with embodiment 2, the difference is that the first and second coatings are not added with NFC. The other conditions were the same as in example 2. The filtration efficiency of the obtained filter material was 75%, the air resistance was 78Pa, and the amount of charge after electret was 1503V. Since the pores are not adjusted using nanocellulose, the filtration efficiency is reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (23)

1. A foaming coating paint is characterized by comprising a paint A and a paint B, wherein the paint A and the paint B are sequentially coated on a porous substrate material;
the coating A comprises 100 parts of a micrometer electret suspension and 3-10 parts of an adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent; the coating B comprises 100 parts of nano electret suspension and 1-10 parts of adhesive; 1-5 parts of a wetting agent; 1-5 parts of a dispersing agent; 1-5 parts of a foaming agent; 1-5 parts of nano cellulose; 1-5 parts of an antibacterial agent.
2. The coating of claim 1, wherein the coating A comprises 100 parts of a micro electret suspension, 3-8 parts of an adhesive, 1 part of a wetting agent, 1 part of a dispersing agent, 2-5 parts of nano cellulose and 1 part of an antibacterial agent; the coating B comprises 5-8 parts of adhesive, 1 part of wetting agent, 1 part of dispersing agent, 2-3 parts of foaming agent, 2-3 parts of nano cellulose and 1 part of antibacterial agent.
3. The coating according to claim 1 or 2, wherein the micro-electret suspension has a solid content of 10-30%, wherein the solid phase is a micro-electret, and the liquid phase is a 10-30% aqueous solution of a dispersant. The solid content is more preferably 19 to 21%.
4. The coating of claim 3, wherein the micro-sized electret comprises one or more of tourmaline powder, silicon nitride, electrode powder, and carnauba wax. The average particle size of the micron-sized electret is 30-80 μm. More preferably, the tourmaline powder and the silicon nitride are 50-80 μm, and the average particle size of the electrode powder and the carnauba wax is 30-50 μm.
5. The coating according to claim 3, wherein the micron-sized electret is prepared by mixing, by mass, 11-13: 7-9: 0.8-1.2: 3.5-4.5 of tourmaline powder, silicon nitride, electrode powder and carnauba wax.
6. The coating according to claim 1 or 2, wherein the nano electret suspension in the coating B has a solid content of 10-20%, wherein the solid phase is a nano electret, and the liquid phase is a dispersant aqueous solution with a mass fraction of 10-20%. Further preferably, the solids content is 20%. Further preferably, the nano-electret is one or more of organic electret materials.
7. The coating of claim 6, wherein the nano-electret comprises polytetrafluoroethylene, polycarbonate and polymethyl methacrylate in a mass ratio of 4.8-5.2: 1.8-2.2. The average particle size of the nano-grade electret is 50-90 nm.
8. The coating of claim 1 or 2, wherein the binder is one of polyvinyl alcohol, carboxymethyl cellulose and starch.
9. The coating of claim 1 or 2, wherein the wetting agent is glycerol, the dispersing agent is sodium hexametaphosphate, and the antimicrobial agent is chitosan.
10. The coating according to claim 1 or 2, wherein the nanocellulose in coating a and coating B is physically or chemically produced nanocellulose; the length of the nano-cellulose is 100-500 nm, and the diameter is 10-30 nm.
11. The method for producing a coating material according to any one of claims 1 to 10,
the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water is uniformly mixed with a dispersing agent, a micron-sized electret is added, then the rest water is added, and the micron-sized electret suspension is uniformly dispersed to obtain a micron-sized electret suspension, wherein the concentration of the dispersing agent is 10-30%, and the solid content is 10-30%; then adding an adhesive, a wetting agent, a dispersing agent, nano-cellulose and an antibacterial agent according to the proportion; obtaining a coating A;
the preparation method of the coating B comprises the following steps: uniformly mixing 3/4 of the total amount of the required water and the required dispersant, adding the nano electret, then adding the residual water to uniformly disperse the dispersion liquid to obtain a nano electret suspension, wherein the concentration of the dispersant is 10-20%, and the solid content is 10-20%; then adding an adhesive, a wetting agent, a dispersing agent, a foaming agent, nano-cellulose and an antibacterial agent according to the proportion; thus, dope B was obtained.
12. The preparation method according to claim 11, wherein the micro-electret and the nano-electret are dispersed in the aqueous solution by ultrasonic dispersion for 20-40 min, preferably 25-35 min.
13. The use method of the coating according to any one of claims 1 to 10, wherein the coating A is coated on the surface of the substrate, and the first coating is obtained by heating and drying at 100 to 120 ℃ for 5 to 10min at a coating weight of 5 to 10g/m2(ii) a Coating the coating B on the surface of the first coating, heating and drying to obtain a second coating, wherein the temperature is 80-125 ℃, the time is 5-12 min, and the coating weight is 5-12 g/m2。
14. The method of claim 13, wherein the substrate is a porous substrate material. Further preferably, the porous base material includes a nonwoven fabric, paper, porous membrane; the non-woven fabric comprises spunlace non-woven fabric, heat seal non-woven fabric, pulp air-laid non-woven fabric and wet non-woven fabric; the paper comprises commercially available mask paper or tea bag paper made of plant fiber.
15. The method of claim 13, wherein the coating comprises one of bar coating, roll coating, and knife coating.
16. Root of herbaceous plantThe method of claim 13, wherein the first coating is dried at a temperature of 108 to 112 ℃; the drying time is 5.5-6.5 min; the coating weight is 7.5-8.5 g/m2；
Preferably, the drying temperature of the second coating is 118-122 ℃; the drying time is 9.5-10.5 min; the coating weight is 9.5-10.5 g/m2。
17. The high-efficiency filter material containing the foaming coating is characterized by comprising the foaming coating and a porous substrate material, wherein a first coating formed by a coating A and a second coating formed by a coating B are sequentially coated on the surface of the porous substrate material; the coating weight of the first coating and the second coating is 5-10 g/m2And 5 to 12g/m2。
18. The method for producing a filter material as claimed in claim 17, wherein the coating A, B is applied to the surface of the porous base material in sequence according to the method for using the foamed coating as claimed in any one of claims 13 to 16.
19. The method of claim 18, wherein the specific manufacturing method of the filter material comprises the following steps:
(1) the preparation method of the coating A comprises the following steps: firstly, 3/4 of the total weight of the required water is uniformly mixed with a dispersant, a micron-sized electret is added, then the rest water is added, and the micron-sized electret suspension is obtained after uniform dispersion; then adding an adhesive, a wetting agent, a dispersing agent, nano-cellulose and an antibacterial agent according to the proportion to obtain a coating A;
(2) the first coating preparation method comprises the following steps: coating the prepared coating A on the surface of a porous substrate material, heating and drying the coating at 100-120 ℃ for 5-10 min, wherein the coating weight is 5-10 g/m2；
(3) The preparation method of the coating B comprises the following steps: uniformly mixing 3/4 of the total amount of the required water with a dispersing agent, adding the nano electret, and then adding the residual water to uniformly disperse the dispersion liquid to obtain a nano electret suspension; then adding an adhesive, a wetting agent, a dispersing agent, a foaming agent, nano-cellulose and an antibacterial agent according to the proportion to obtain a coating B;
(4) the preparation method of the second coating comprises the following steps: coating the coating B on the surface of the first coating, heating and drying to obtain a second coating, wherein the temperature is 80-125 ℃, the time is 5-12 min, and the coating weight is 5-12 g/m2。
20. Use of the high efficiency filter material of claim 19 in filtration and dust removal.
21. The use of the high efficiency filter material of claim 19 in masks and filters.
22. A mask comprising the high efficiency filter according to claim 19 as a raw material or a filter.
23. A filter device characterized by using the high-efficiency filter material according to claim 19 as a filter portion.
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