CN101721855A - Nano fiber and glass fiber composite filter material and preparation method thereof - Google Patents
Nano fiber and glass fiber composite filter material and preparation method thereof Download PDFInfo
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- CN101721855A CN101721855A CN200910191721A CN200910191721A CN101721855A CN 101721855 A CN101721855 A CN 101721855A CN 200910191721 A CN200910191721 A CN 200910191721A CN 200910191721 A CN200910191721 A CN 200910191721A CN 101721855 A CN101721855 A CN 101721855A
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Abstract
The invention discloses a nano fiber and glass fiber composite filter material and a preparation method thereof. The nano fiber and glass fiber composite filter material comprises a glass fiber filtrate and nano fibers boned onto the surface of the glass fiber filtrate, wherein the average aperture of the glass fiber filtrate is less than or equal to 20 mum; and the average diameter of the nano fibers is less than and equal to 0.05 mum. At the same time, the invention also discloses a preparation method of the nano fiber and glass fiber composite filter material comprises: 1, driving the glass fiber filtrate by using a draw gear to pass through an electric field generated between a centrifugal pan and a collector electrode; 2, pumping solution of a polymer into the centrifugal pan to generate nano fibers in the electric field under the action of the centrifugal pan rotating at a high speed, and driving the nano fibers toward the collector electrode and allowing the nano fibers to deposit on the surface of the glass fiber filtrate; and 3, drying the glass fiber filtrate the surface of which is boned with the nano fibers. In the invention, under a condition of constant resistance, the filtration efficiency of the glass fiber filtrate is improved, and the glass fiber filtrate allows for easy ash removal.
Description
Technical field
The present invention relates to the filter medium of air cleaner, specifically, is a kind of nano fiber and glass fiber composite filter material and preparation method thereof.
Background technology
Air filtration is air filter, is meant by filtrate the approaching removal fully of airborne contaminant particles.Filtrate is the porous material that the solid particle that is scattered in the fluid of disperse can be separated, and the fluid of disperse can be gas or liquid.The kind of filtrate has fiber filtering, miillpore filter and coated filter material.Filtrate is determining the effect and the benefit of filter process.
The glass fibre filtrate is high temperature resistant with it, corrosion resistance is strong, dimensional stability is good and be widely used in the filtering material field, but have that filter efficiency is low, problems such as resistance increases, can not use repeatedly behind the long-play, especially not high to the fine dust rate of recovery below 1 micron, therefore can't use the clean place of the demanding electronics of filtering accuracy by Ying Yu.For this reason, people adopt the filter efficiency that improves the glass fibre filtrate in the technology of fiberglass surfacing overlay film, reduce running resistance.At present, the technology that is laminated with of domestic membrane-laminated fiberglass filter media has two kinds: a kind of is to stick with glue agent film is bonded in (abbreviation on the glass fibre base cloth, gluing method), adopt bonding expanding microporous polytetrafluoroethylene (PTFE) film on the glass fibre base cloth as Chinese patent CN2825066, filtrate with this explained hereafter, when temperature reached 100 ℃, the adhesive of bonding usefulness melted, and occurred the problem that film comes off easily; The another kind method of being laminated with is that general in the world hot pressing is laminated with technology, membrane-laminated fiberglass filter media with this technology production, the efficiency of dust collection height, running resistance is low, long service life, no film obscission is as Chinese patent CN101406811, form base cloth with polytetrafluoroethylene fibre and glass fibre blending earlier, carry out high temperature hot pressing with the ptfe surface film then.The shortcoming that this technology exists is: average pore size 0.2～3 μ m of film is covered and used in (1), and efficiency of dust collection is limited; (2) cost height.
Summary of the invention
One of purpose of the present invention is nano fiber and glass fiber composite filter material, to improve the filter efficiency of glass fibre filtrate, to satisfy of the application of present glass fibre filtrate in wider scope, simultaneously in the constant situation of resistance, for guaranteeing the environmental development of glass fibre filtrate to higher filtration rank.
To achieve these goals, technical scheme of the present invention is: a kind of nano fiber and glass fiber composite filter material, it is characterized in that: constitute by glass fibre filtrate and the nanofiber that is combined in this glass fibre filter material surface, the average pore size of described glass fibre filtrate≤20 μ m, the average diameter of described nanofiber≤0.05 μ m.
The thickness of described layers of nanofibers is 0.02～0.04mm.
Another object of the present invention is to provide a kind of preparation method of nano fiber and glass fiber composite filter material, comprising:
Step (1), glass fibre filtrate electric field under haulage gear drives through between centrifugal pan and colelctor electrode, producing;
Step (2), polymer solution pump in the centrifugal pan, produce nanofiber under the centrifugal pan effect of at a high speed rotation in described electric field, and this nanofiber is by with to colelctor electrode and be deposited on the surface of described glass fibre filtrate;
Step (3), with the glass fibre filtrate drying of surperficial combining nano fiber.
Method of the present invention is basic unit in conjunction with the relevant theory of centrifugal spinning and electrospinning silk with the glass fibre filtrate, at its surface recombination nanofiber.Nanofiber can result from one or more pores, the average fibre diameter of ejection below 0.05 μ m, and with one deck layers of nanofibers attached to substrate surface, reach in the constant situation of resistance, promote the purpose of media filtration efficient.
Among the above-mentioned preparation method, described polymer solution is to have the polyamide 6 that manganese content is 44000～50000g/mol, and the concentration of polyamide 6 is 10～20wt%, and solvent is a formic acid.The flow velocity of described polymer solution is 10～20ml/min.The rotary speed of described centrifugal pan (2) is 6500～7500rpm.Distance between described centrifugal pan (2) and the described colelctor electrode (1) is 62～75cm.Electrical potential energy 110～200KV between described centrifugal pan (2) and the described colelctor electrode (1).Baking temperature is 120～150 ℃ described in the step (3).
Compared with prior art, the invention has the beneficial effects as follows:
(1), improves the filter efficiency of glass fibre filtrate in the constant situation of resistance;
(2) because the novel filter material after compound is filtered by former deepness becomes surface filtration (the dull filtration refers to that dust and impurity are adsorbed or stop at fibrous inside, be difficult for blowing clearly), dust, impurity all are blocked in superficial layer, are easy to deashing, can use repeatedly.
(3) the technology cost is low.
(4) the glass fibre filtrate is from as raw mineral materials, can automatic efflorescence, and nano-fiber material is a polyurethane material, and degraded automatically under certain environment, this advanced composite material (ACM) can not cause danger to environment, belongs to environment-friendly products.
Description of drawings
Fig. 1 is preparation method's of the present invention process chart.
Fig. 2 is the Electronic Speculum figure of the nano fiber and glass fiber composite filter material of the present invention's production.
The specific embodiment
Further the present invention is illustrated below in conjunction with embodiment.
Referring to Fig. 1, for producing the device of nano fiber and glass fiber composite filter material, mainly form by colelctor electrode 1, centrifugal pan 2, topping-up pump 3, motor 4, collector supply 5, carry-over pinch rolls 6, infrared heating device 7 and high-pressure air source 8, wherein colelctor electrode 1 links to each other with collector supply 5 through lead, centrifugal pan 2 is installed in colelctor electrode 1 the place ahead, and the space of energising back between colelctor electrode 1 and centrifugal pan 2 produces electric field.Centrifugal pan 2 is by motor 4 driven rotary, and the charging aperture of this centrifugal pan 2 is communicated with through the outlet of pipeline with topping-up pump 3.Carry-over pinch rolls 6 drive the glass fibre filtrate and move between colelctor electrode 1 and centrifugal pan 2, are provided with infrared heating device 7 after colelctor electrode 1 and centrifugal pan 2.
Technology of the present invention is: the glass fibre filtrate of producing or buy different size, model earlier according to client's needs, the glass fibre filtrate that is adopted in the present embodiment is a glass fiber filter paper, according to the direction of arrow shown in Fig. 1 the glass fibre filtrate is passed carry-over pinch rolls 6, rolling place is the automatic winding device.
Open motor 4, open topping-up pump 3, high-pressure air source 8 and collector supply 5 then.Squeeze into pipeline through mixed polymer solution through topping-up pump 3, at the pipeline place after high-pressure air source 8 pressurization, polymer solution pumps in the centrifugal pan 2 with certain speed, polymer solution is dispersed into very tiny nanofiber through the centrifugal pan 2 of rotation at a high speed with it, enter the electric field between centrifugal pan and colelctor electrode, nanofiber is directed to colelctor electrode 1 and is deposited on the glass fibre filter material surface under electric field action, after arriving the glass fibre filtrate, because the glass fibre filtrate has certain water absorbing capacity, nanofiber is diffused into whole glass fibre filtrate very soon.Because the nanofiber that is combined on the glass fibre filtrate has certain humidity, for considering economy and the property produced in batches, set up one section infrared heating device 7 in its back-end so that the layers of nanofibers that can form the very thin drying of one deck on the bringing-up section glass fibre filter material surface is passed through in the evaporation of solvent.Enter rolling place through carry-over pinch rolls 6 at last, finish whole process of production.
Consider that for environmental protection the prescription of the used polymer solution of technology of the present invention is: have the polyamide 6 that manganese content is 44000g/mol (available from the kymene 300 of German BASF AG), the concentration of polyamide 6 is 10wt%, and solvent is a formic acid.Polyurethane material is degraded automatically under certain environment, can not cause danger to environment.Certain polymer solution of the present invention also can adopt other polymer.
Specific embodiment 1～4
Table 1 is the performance of the used glass fibre filtrate of various embodiments of the present invention.
Table 1:
| Sequence number | Project | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| ??1 | 5.3cm/s 0.3um efficient | ??％ | ??94 | ??98 | ??99.98 | ??99.9995 |
| ??2 | Gas-flow resistance 0.32L/cm 2.min | ??Pa | ??108 | ??170 | ??320? | ??480 |
| ??3 | Thickness | ??mm | ??0.33 | ??0.33 | ??0.33 | ??0.33 |
Table 2 is the technological parameter of various embodiments of the present invention.
Table 2:
| The distance c m of centrifugal pan and colelctor electrode | The flow velocity ml/min of Polymer Solution | The rotary speed rpm of centrifugal pan | The current potential KV of centrifugal pan and inter-collector | |
| Embodiment 1 | ??62 | ??10 | ??6500 | ??110 |
| Embodiment 2 | ??65 | ??15 | ??7500 | ??120 |
| Embodiment 3 | ??70 | ??13 | ??6500 | ??150 |
| Embodiment 4 | ??75 | ??20 | ??7000 | ??200 |
The product that table 3 makes for various embodiments of the present invention and compound before the contrast of glass fibre media performance
Table 3:
Table 3 explanation is after spraying one deck layers of nanofibers in the glass fibre filtrate basic unit, and its filter efficiency increases greatly, but resistance does not change.
Fig. 2 represents is the Electronic Speculum figure of the nano fiber and glass fiber composite filter material produced of the present invention.Globule among the figure is pollutants such as the dust, impurity after filtering.From picture as can be seen; pollutants such as the dust of 80-90%, impurity are all stopped by layers of nanofibers and adsorb; after use after a while; dust forms filter cake in surface accumulative total; carry out protected space by dust blocks dust or impurity, reach certain hour after, deashing is carried out in its taking-up; reach the purpose of using repeatedly, the amount of remaining 10%-20% just enters basic unit's glass fibre filtrate and is filtered.Layers of nanofibers after compound has characteristics such as micropore is little, porosity is big, and most of dust all is to be attracted on the nanofiber, can deashing after use by wind, and can use repeatedly.This technology has also solved the difficult problem that the glass fibre filtrate can not clean and use repeatedly.
Claims (9)
1. nano fiber and glass fiber composite filter material, it is characterized in that: constitute by glass fibre filtrate and the nanofiber that is combined in this glass fibre filter material surface, the average pore size of described glass fiber filter material≤20 μ m, the average diameter of described nanofiber≤0.05 μ m.
2. nano fiber and glass fiber composite filter material according to claim 1 is characterized in that: the thickness of described layers of nanofibers is 0.02～0.04mm.
3. the preparation method of nano fiber and glass fiber composite filter material as claimed in claim 1 is characterized in that comprising:
Step (1), glass fibre filtrate electric field under haulage gear drives through between centrifugal pan (2) and colelctor electrode (1), producing;
Step (2), polymer solution pump in the centrifugal pan (2), produce nanofiber under centrifugal pan (2) effect of at a high speed rotation in described electric field, and this nanofiber is by with to colelctor electrode (1) and be deposited on the surface of described glass fibre filtrate;
Step (3), with the glass fibre filtrate drying of surperficial combining nano fiber.
4. the preparation method of nano fiber and glass fiber composite filter material according to claim 3, it is characterized in that: described polymer solution is to have the polyamide 6 that manganese content is 44000～50000g/mol, the concentration of polyamide 6 is 10～20wt%, and solvent is a formic acid.
5. the preparation method of nano fiber and glass fiber composite filter material according to claim 3, it is characterized in that: the flow velocity of described polymer solution is 10～20ml/min.
6. the preparation method of nano fiber and glass fiber composite filter material according to claim 3, it is characterized in that: the rotary speed of described centrifugal pan (2) is 6500～7500rpm.
7. the preparation method of nano fiber and glass fiber composite filter material according to claim 3, it is characterized in that: the distance between described centrifugal pan (2) and the described colelctor electrode (1) is 62～75cm.
8. the preparation method of nano fiber and glass fiber composite filter material according to claim 3 is characterized in that: the electrical potential energy 110～200KV between described centrifugal pan (2) and the described colelctor electrode (1).
9. the preparation method of nano fiber and glass fiber composite filter material according to claim 3, it is characterized in that: baking temperature is 120～150 ℃ described in the step (3).
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| CN200910191721A CN101721855A (en) | 2009-12-04 | 2009-12-04 | Nano fiber and glass fiber composite filter material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373513A (en) * | 2010-08-12 | 2012-03-14 | 华东师范大学 | Horizontal disc rotating centrifugal spinning method |
| CN103706183A (en) * | 2013-12-13 | 2014-04-09 | 同济大学 | Glue-bonding-free composite filter material manufacturing device and application method thereof |
| CN105671658A (en) * | 2016-04-06 | 2016-06-15 | 佛山轻子精密测控技术有限公司 | Electrostatic spinning device using circular electrode |
| CN106268033A (en) * | 2016-08-30 | 2017-01-04 | 苏凤全 | A kind of high temperature resistant anti-deformation filter pocket material |
| CN109152970A (en) * | 2016-04-22 | 2019-01-04 | 克拉考公司 | Multilayer or multiple polymer fine fiber webs |
-
2009
- 2009-12-04 CN CN200910191721A patent/CN101721855A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373513A (en) * | 2010-08-12 | 2012-03-14 | 华东师范大学 | Horizontal disc rotating centrifugal spinning method |
| CN103706183A (en) * | 2013-12-13 | 2014-04-09 | 同济大学 | Glue-bonding-free composite filter material manufacturing device and application method thereof |
| CN103706183B (en) * | 2013-12-13 | 2016-04-06 | 同济大学 | A kind of gluing-free composite filtering material manufacturing installation and using method thereof |
| CN105671658A (en) * | 2016-04-06 | 2016-06-15 | 佛山轻子精密测控技术有限公司 | Electrostatic spinning device using circular electrode |
| CN105671658B (en) * | 2016-04-06 | 2017-11-03 | 佛山轻子精密测控技术有限公司 | A kind of circular electrode electrostatic spinning apparatus |
| CN109152970A (en) * | 2016-04-22 | 2019-01-04 | 克拉考公司 | Multilayer or multiple polymer fine fiber webs |
| CN106268033A (en) * | 2016-08-30 | 2017-01-04 | 苏凤全 | A kind of high temperature resistant anti-deformation filter pocket material |
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Application publication date: 20100609 |