CN106377948A - Nano fiber coating layer super-hydrophobic self-cleaning air filter core and manufacturing method thereof - Google Patents
Nano fiber coating layer super-hydrophobic self-cleaning air filter core and manufacturing method thereof Download PDFInfo
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- CN106377948A CN106377948A CN201610784737.6A CN201610784737A CN106377948A CN 106377948 A CN106377948 A CN 106377948A CN 201610784737 A CN201610784737 A CN 201610784737A CN 106377948 A CN106377948 A CN 106377948A
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- automatic cleaning
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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
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
- D06M13/517—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond containing silicon-halogen bonds
-
- 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
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
-
- 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
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
- B01D2239/0428—Rendering the filter material hydrophobic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/38—Polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
Abstract
The invention discloses a nano fiber coating layer super-hydrophobic self-cleaning air filter core and a manufacturing method thereof. The nano fiber coating layer super-hydrophobic self-cleaning air filter core comprises a micron filter core material substrate and a nano hydrophobic fiber non-woven thin film; the nano hydrophobic fiber non-woven thin film is formed by electrospinning a hydrophobic material; the micron filter core material substrate is formed through small molecule atmosphere fumigation of a chemically grafted hydrophobic material. The filter core with a double-layer material structure provides a super-hydrophobic and low-adhesion surface of a micro-nano structure, also ensures hydrophobicity of a lower-layer substrate paper fiber material, thereby achieving the super-hydrophobic surface properties with practical strength and durability on the paper fiber material substrate, ensuring good air permeability, and achieving high-efficiency self-cleaning and reuse of the filter core of air purification equipment.
Description
Technical field
The present invention relates to filtering material technical field, specifically, disclose a kind of nanofiber coating super-hydrophobic certainly clear
Clean filtering element for air filter and manufacture method.
Background technology
Air filtering core is the core cell of air cleaning facility, and the filtering material within filter element is net to the air of cleaning equipment
Change effect and play decisive role.General it is desirable to filtering material possesses, filter efficiency is high, and gas-flow resistance is little, and mechanical strength is big, all
Even property is good, meets high temperature resistant, waterproof, mould proof performance characteristics.
From earlier 1900s, air filting material quickly grows, from initial natural fiber woven fabric filtering material,
Develop into glass fiber filter material, then emerge to non-woven filter material, and then develop into compound, specific functionality filtration
Material.Meanwhile, the filtering material in different performance and stage, is all by corresponding manufacturing technology.For example, non-woven filter material
Manufacture, existing wet method and chemical adhesion process technology, after have the manufacture methods such as acupuncture, spunbond, spray fusing, enrich filtration further
Material multiformity and the strainability improving filtering material.
At present, by micrometer fibers manufacture, it is surface-hydrophobicized for the air purifying filter core material being mostly based on fiber
There are two huge technological challenges in process：1) fibrous material mostly is the micron order material being more than 10 microns, and more than 10 microns
The surface micro-structure of yardstick cannot build the super hydrophobic surface of low adhesion；2) demand to loose structure breathability for the material for core,
Loose structure is caved in, the surface modification technology such as the surface of hole plug is coated with, solution soaking grafting cannot be applied to filter element
On material.
Use with air cleaning facility and operation, in room air, suspended particulate substance is attached to filter element filtering by accumulation
On material, when the laying dust amount on filter element filtering material reaches certain numerical value, drafting efficiency will decline, or even completely can not
Ventilative, lose the function of depurator itself.Currently, the filter element of most air cleaning facilities is single use consumptive material portion
Part, filter element need to periodically be changed.Develop the automatically cleaning filter element that can be recycled, to popularization air purifier, and reduce it and make
With cost, improve air purification efficiency, there is huge economic worth and environmental conservation meaning.
Content of the invention
For solving above-mentioned technical problem, the present invention proposes a kind of nanofiber coating super-hydrophobic automatic cleaning air filter
Filter element and manufacture method.
A kind of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter is it is characterised in that include micron filter element material
Material substrate and nano-sized hydrophobic fiber non-woven thin film, described nano-sized hydrophobic fiber non-woven thin film passes through electrostatic by hydrophobic material
Spinning is formed, and described micron material for core substrate is passed through small molecule atmosphere and fumigated, chemical graft hydrophobic material.
Preferably, described hydrophobic material be polystyrene PS, polyurethane PU, polymethyl methacrylate (PMMA) or
Polyvinyl pyrrolidone (PVP).
Preferably, the paper fiber material that described micron material for core substrate is made up of the fiber of 10-30 μm of diameter, thickness
Scope is 200-1000 μm.
Preferably, described nano-sized hydrophobic fiber non-woven thin film is to be made up of the polymer fiber of diameter 100-500nm, thick
Degree scope is 5-100 μm.
Preferably, described chemical graft hydrophobic material is silicon fluoride.
A kind of manufacture method of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter it is characterised in that
First, the hydrophobic material having manufactured is poured into material tank, by electrostatic spinning nozzle, in micron material for core base
On bottom, electrospinning manufactures nano-sized hydrophobic fiber non-woven thin film；
Then, fumigated by small molecule atmosphere, chemical graft hydrophobic material in micron material for core substrate, realize micron
The silicic acid anhydride of base material.
Optionally, in micron material for core substrate chemical graft hydrophobic material process, with electrospinning manufacture nano-sized hydrophobic
The process of property fiber non-woven thin film is carried out simultaneously.
Preferably, described hydrophobic material is 5-20% (mass percent) polystyrene PS or polyurethane PU.
Preferably, the electrostatic potential scope during described electrostatic spinning is 5k-20k volt.
The present invention is using " nano-sized hydrophobic is fiber film-coated " and " process of material for core surface small molecule grafted hydrophobic " two kinds of works
Skill combines the hydrophobic automatically cleaning filter element manufacturing strengthening, wherein, surface nanofibre air-permeable, hydrophobic coating, super-hydrophobic top layer is provided
Micro-nano structure surface；Material for core surface small molecule grafting air-permeable, hydrophobic is processed, and provides substrate to support for surface micro-nano coating
The hydrophobic property simultaneously providing strengthening ensures.The design of this double layer material is in the super-hydrophobic low adhesive surface providing micro nano structure
While, more ensure the hydrophobicity of its lower substrate paper fiber material, thus realizing realizing in the substrate of paper fiber material
There is the super hydrophobic surface performance of practical intensity and ruggedness, ensure its good breathability simultaneously.This technology is in air filter
Change application in device and can achieve air cleaning facility filter element high-efficiency self-cleaning and recycling, net for reduction domestic or professional air
Change device practical cost aspect and there is huge economic worth and the value of environmental protection.
Brief description
Fig. 1 is the system manufacturing super-hydrophobic automatic cleaning filtering element for air purifier in the embodiment of the present invention by electrostatic spinning technique
Make schematic diagram.
Fig. 2 is manufactured nano polymer fibers stereoscan photograph in the embodiment of the present invention, micron polymer fiber
Stereoscan photograph and hydrophobic polymer nanofiber coating automatically cleaning filter cartridge construction schematic diagram.
Fig. 3 is the micrometer fibers filter material with hydrophobic treatment for the nanofiber coating of the hydrophobic treatment in the embodiment of the present invention
Material surface wettability comparison diagram.
Fig. 4 is the dynamic wellability receding angle test scanning of the hydrophobic polymer nanofiber coating in the embodiment of the present invention
Electromicroscopic photograph.
Fig. 5 be super-hydrophobic automatic cleaning filtering element for air purifier in the embodiment of the present invention after laying dust, by simple clear water
Rinse the effect broken line graph (10 realizing that the reversible experiment of material for core laying dust cleaning and the recovery of air cleaning efficiency of dust collection obtains
Secondary circulation), in figure, abscissa is cycle-index, and vertical coordinate is pressure reduction, unit：Pascal.
Specific embodiment
With reference to specific embodiment, nanofiber coating super-hydrophobic automatic cleaning air filter of the present invention is filtered
Core and manufacture method are described further, but protection scope of the present invention is not limited to this.
The present invention utilizes super-hydrophobic low adhesive surface, the self-cleaning principle of natural imitation circle Folium Nelumbinis, is surpassed using current cleaning
The solid grain contaminations such as the microgranules such as the dust of hydrophobic surface attachment.The present invention builds " nano-sized hydrophobic fiber by multilevel design
The hydrophobic automatically cleaning filter element that two kinds of process integration manufactures of overlay film " and " process of material for core surface small molecule grafted hydrophobic " are strengthened,
First, manufacture the hydrophobic polymer fibers coating of nanoscale (100-500nm) using electrostatic spinning, build nanofibrous structures layer
Super hydrophobic surface；Then, it is grafted silicon fluoride using gas fumigation small molecule, realizing the hydrophobic of micron filter element fibrous material layer
It is ensured that its loose structure and breathability while modification.
Fig. 1 is the system manufacturing super-hydrophobic automatic cleaning filtering element for air purifier in the embodiment of the present invention by electrostatic spinning technique
Make schematic diagram.As shown in fig. 1, electrostatic spinning (Electro-spinning) technology is by putting polymer solution or melt
In high-voltage electrostatic field, powered polymer drop is stretched in the presence of electric field Coulomb force, and the quick nanometer that manufactures is to micron
The high efficiency method of level fiber, its have rapid large-area manufacture nanostructured, material compatibility strong the features such as.Micro-/receive compound thick
Rough structure is to realize that the surface of solids is super-hydrophobic, the key of low-adhesion matter, and nanostructured provides big specific surface area, micrometer structure
It is used for providing surface mechanical strength and bigger nanostructured fluctuating roughness.It is fine in micron filter element that the present invention passes through electrostatic spinning
Nanostructure fabrication on Wiki bottom, thus realize former micrometer fibers substrate filter element, filter paper material cannot be realized by chemical modification
Super-hydrophobic, low-adhesion matter.
Nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter
Fig. 2 is manufactured nano polymer fibers stereoscan photograph in the embodiment of the present invention, micron polymer fiber
Stereoscan photograph and hydrophobic polymer nanofiber coating automatically cleaning filter cartridge construction schematic diagram.As the 3rd width figure in Fig. 2
Shown, presently disclosed nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter has double-layer structure, including micro-
Rice material for core substrate and nano-sized hydrophobic fiber non-woven thin film.
Described nano-sized hydrophobic fiber non-woven thin film is formed by electrostatic spinning by hydrophobic material, Ke Yishi, for example, institute
Stating hydrophobic material is polystyrene PS, polyurethane PU, polymethyl methacrylate (PMMA) or polyvinyl pyrrolidone
(PVP) etc..
The paper fiber material that described micron material for core substrate is made up of the fiber of 10-30 μm of diameter, preferably diameter 20 μ
m.
The thickness range of described micron material for core substrate can be, for example, 200-1000 μm, 300 μm of preferred thickness.
Described hydrophobic fibre nonwoven film is to be made up of the polymer fiber of diameter 100-500nm, preferably a diameter of
100nm.
The thickness range of described hydrophobic fibre nonwoven film can be, for example, 5-100 μm, 10 μm of preferred thickness.
Described micron material for core substrate is passed through small molecule atmosphere and is fumigated, and in micron material for core substrate, chemical graft is dredged
Water material, preferably silicon fluoride.
The present invention pass through to build on the micrometer structure of material for core hydrophobic nanostructured manufacture micro-/receive compound coarse
Surface and by atmosphere fumigate small molecule grafting strengthen micron substrate hydrophobicity both technique synergism build super-hydrophobic,
The air filtering core material surface of low adhesion, and then realize the hydrophobic self-cleaning property of filter element.
The manufacture method of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter
First, as shown in fig. 1, the hydrophobic material having manufactured is poured into material tank, by electrostatic spinning nozzle, micro-
In rice material for core substrate, electrospinning manufactures nano-sized hydrophobic fiber non-woven thin film, and described hydrophobic fibre nonwoven film constitutes tool
There is the hydrophobic surface of roughness.Above-mentioned hydrophobic material can be, for example, 5-20% (mass percent) polystyrene PS or poly-
Urethane PU etc..Electrostatic potential scope during above-mentioned electrostatic spinning can be that for example, 5k-20k lies prostrate.Fig. 2 is that the present invention is implemented
Manufactured nano polymer fibers stereoscan photograph, micron polymer fiber stereoscan photograph and hydrophobic polymeric in example
Thing nanofiber coating automatically cleaning material for core structural representation.As shown in Figure 2, described hydrophobic fibre nonwoven film be by
The polymer fiber of diameter 100-500nm is constituted, preferably a diameter of 100nm.The thickness model of described hydrophobic fibre nonwoven film
Enclosing to be, for example, 5-100 μm, 10 μm of preferred thickness.Described micron material for core substrate is by the fiber structure of 10-30 μm of diameter
The paper fiber material becoming, preferably 20 μm of diameter.The thickness range of described micron material for core substrate can be, for example, 200-
1000 μm, 300 μm of preferred thickness.
Then, fumigated by small molecule atmosphere, chemical graft hydrophobic material in micron material for core substrate, preferably fluorine silicon
Alkane, realizes the silicic acid anhydride of micron substrate material, the hydrophobicity of strengthening micrometer structure.
Certainly, it may occur to persons skilled in the art that, chemical graft hydrophobic material in the above-mentioned material for core substrate in micron
Process, can with electrospinning manufacture nano-sized hydrophobic fiber non-woven thin film process carry out simultaneously.
Nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter performance test
Test one
The nanofiber coating super-hydrophobic automatic cleaning air filtering core air purifier applying presently disclosed is placed in height
The flour of dust environment, manufacture of cement plant area.After two hours, filter differential pressures raise 79.7%, and laying dust amount reaches 2.46kg/
m2.Filter element is taken out, slowly rinses 20-40 time second with clear water, the laying dust of filter element 99% is removed, filter element holding drying can be
When install back air purifier, depurator inside and outside differential pressure returns to about initial 42 Pascals.Fig. 5 is in the embodiment of the present invention
Super-hydrophobic automatic cleaning filtering element for air purifier, after laying dust, is rinsed by simple clear water and realizes material for core laying dust cleaning and air
The effect broken line graph (10 circulations) that the reversible experiment that purifying and dedusting efficiency is recovered obtains.As shown in Figure 5, pass through " laying dust-
After flushing " 10 bouts of Reusability, filter element evolution laying dust efficiency appoints the 75% of right holding starting efficiency, and depurator is initially inside and outside
Pressure reduction only rises 25% (50 Pascal).
Test two
General by applying presently disclosed nanofiber coating super-hydrophobic automatic cleaning air filtering core air purifier to be placed in
Logical living environment, for example, areas of Beijing office building.It is more than in 300 haze weather in PM2.5, after continuously running 72 hours, mistake
Filter pressure differential raises 4.1%, and laying dust amount reaches 0.13kg/m2.Filter element is taken out, slowly rinses 20-40 time second with clear water,
The laying dust of filter element 99% is removed, and filter element keeps drying can immediately install back air purifier, and depurator inside and outside differential pressure returns to
About initial 42 Pascals.After 5 bouts of " laying dust-flushing " Reusability, filter element evolution laying dust efficiency appoints right holding just
The 95% of beginning efficiency, the initial inside and outside differential pressure of depurator only rises 5% (45 Pascal).
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (9)
1. a kind of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter is it is characterised in that include micron material for core
Substrate and nano-sized hydrophobic fiber non-woven thin film, described nano-sized hydrophobic fiber non-woven thin film passes through Static Spinning by hydrophobic material
Silk is formed, and described micron material for core substrate is passed through small molecule atmosphere and fumigated, chemical graft hydrophobic material.
2. nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to claim 1 is it is characterised in that institute
Stating hydrophobic material is polystyrene PS, polyurethane PU, polymethyl methacrylate (PMMA) or polyvinyl pyrrolidone
(PVP).
3. nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to claim 1 is it is characterised in that institute
State the paper fiber material that micron material for core substrate is made up of the fiber of 10-30 μm of diameter, thickness range is 200-1000 μm.
4. nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to claim 2 is it is characterised in that institute
Stating nano-sized hydrophobic fiber non-woven thin film is to be made up of the polymer fiber of diameter 100-500nm, and thickness range is 5-100 μm.
5. nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to claim 1 is it is characterised in that institute
Stating chemical graft hydrophobic material is silicon fluoride.
6. a kind of manufacture method of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter it is characterised in that first, will
The hydrophobic material having manufactured pours into material tank, and by electrostatic spinning nozzle, in micron material for core substrate, electrospinning manufacture is received
Rice hydrophobic fibre nonwoven film；
Then, fumigated by small molecule atmosphere, chemical graft hydrophobic material in micron material for core substrate, realize micron substrate
The silicic acid anhydride of material.
7. the manufacture method of nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to claim 6, its
It is characterised by, the process of chemical graft hydrophobic material in micron material for core substrate, manufacture nano-sized hydrophobic fiber with electrospinning
The process of nonwoven film is carried out simultaneously.
8. the nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter according to any one in claim 6 or 7
Manufacture method it is characterised in that described hydrophobic material is 5-20% (mass percent) polystyrene PS or polyurethane PU.
9. according to Claim 8 in nanofiber coating super-hydrophobic automatic cleaning filtering element for air filter described in any one system
Make method it is characterised in that the electrostatic potential scope during described electrostatic spinning is 5k-20k volt.
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| CN201610784737.6A CN106377948A (en) | 2016-08-30 | 2016-08-30 | Nano fiber coating layer super-hydrophobic self-cleaning air filter core and manufacturing method thereof |
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| CN201610784737.6A CN106377948A (en) | 2016-08-30 | 2016-08-30 | Nano fiber coating layer super-hydrophobic self-cleaning air filter core and manufacturing method thereof |
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| CN110180260A (en) * | 2019-05-14 | 2019-08-30 | 中安瑞材(北京)科技有限公司 | A kind of air purifying filter core and preparation method |
| CN110656501A (en) * | 2019-09-16 | 2020-01-07 | 芜湖迅齐纺织有限公司 | Hydrophobic modification method of fiber |
| CN113463278A (en) * | 2021-07-21 | 2021-10-01 | 内蒙古工业大学 | Nano/micron composite fiber membrane and preparation method thereof |
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