CN100509109C - Method for preparing functional air filtering material based on wool fiber - Google Patents
Method for preparing functional air filtering material based on wool fiber Download PDFInfo
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- CN100509109C CN100509109C CNB2007100183407A CN200710018340A CN100509109C CN 100509109 C CN100509109 C CN 100509109C CN B2007100183407 A CNB2007100183407 A CN B2007100183407A CN 200710018340 A CN200710018340 A CN 200710018340A CN 100509109 C CN100509109 C CN 100509109C
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Abstract
The invention discloses a preparation method of the functional air filtration material based on the wool fiber, which includes the selection of the substrate, the design method of the fabric structure and the arranging method of the nanometer photocatalysis, the method is conducted according to following steps: the wool fiber is chosen as the substrate, the wool fiber is woven into the fabric, the woven fabric density adopts the design methods of empty reed and void weft, the warp density is thirty 30 lines per centimeter, the weft density is thirty five lines per centimeter, the fabric weave adopts the structure of the ribbed weave, and then adopts the direct dip coating method to implement nanometer photocatalysis arrangement to the woven fabric. The functional air filtration material made by the method of the invention has the function of outstanding indoor air purification, and can meet the need of good indoor air quality by people.
Description
Technical field
The invention belongs to technical field of material, relate to a kind of preparation method of air filting material of idle call, particularly a kind of preparation method of the functional air filtering material based on wool fiber.
Background technology
Indoor environment is human survival and the important place of carrying out comings and goings, the room air pollution that the use of indoor various mankind's activities such as interior decoration, kitchen fuel combustion, smoking and air-conditioning etc. is brought and outstanding day by day to the health affected problem.
An important measures that improves indoor air quality is to use the air filtration technology.Common air filting material can only stop particle, pernicious gas and VOC (VolatileOrganic Compounds can not degrade, be called for short VOCs), be again the hotbed of bacteria breed simultaneously, easily cause air secondary to pollute, can not satisfy people indoor air quality requirement.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of the functional air filtering material based on wool fiber, the air filting material that this method prepares more can be antibiotic when removing particle, remove pernicious gas and VOCs.
The technical solution adopted in the present invention is, a kind of preparation method of the functional air filtering material based on wool fiber carries out according to the following steps,
A. select for use wool fiber as base material;
B. wool fiber is woven into fabric, fabric adopts the empty latitude method for designing of empty reed through the filling density design, and through close 30/cm, 35/cm of filling density, fabric tissue adopts the cord weave structure;
C. prepare nano-TiO
2The photocatalysis dispersion liquid
D. the above-mentioned fabric that is woven into is adopted direct dip coating to carry out the nano-photo catalytic arrangement
At room temperature, the fabric that step b is woven into immerses the nano-TiO that step c makes
2In the photocatalysis dispersion liquid, take out after at least 30 minutes, put into electric drying oven with forced convection then and dry 20min～50min down, promptly make functional air filtering material of the present invention at 50 ℃～90 ℃.
Beneficial effect of the present invention is as follows:
1. the present invention selects for use the natural wool fiber as base material, because the wool fiber PARA FORMALDEHYDE PRILLS(91,95) has suction-operated, and wool fiber itself can be with Degradation Formaldehyde, this is the distinguishing feature that is different from existing air filting material, the secondary pollution of having avoided common filtering material itself to be caused, the filtering material that the present invention is prepared becomes environment-friendly products completely, compares with existing air filting material to have more outstanding environmental protection using value.
2. the present invention has adopted the empty latitude design of empty reed to a series of preferred qualifications of fabric construction design having carried out of air filting material through the filling density design, and pck count has kept being interrupted consistent; Through close 30/cm, 35/cm of filling density, both guaranteed the due mechanical strength of air-conditioning filtrate, make filtrate have gas permeability preferably again, thereby reduced the resistance of filtrate; Fabric tissue adopts cord weave, has increased the specific area of fabric, this filtrate is increased the adsorbance of pernicious gas, and fabric breathability is better, thereby filtering material resistance is less.These a series of preferred qualifications, the material that makes the present invention prepare can obtain the good filter effect that improves filter efficiency, reduces filtration resistance a nearlyer step.
Since among the present invention to being that the functional air filtering material of base material has carried out the nano-photo catalytic arrangement with the wool fiber, further improved the degradation speed of formaldehyde and other pernicious gas and VOCs, make this functional air filtering material have stable photocatalysis effect and good antibacterial functions, more give full play to the effect that this air filting material purifies air.
4. because wool fiber has natural absorption property, can make pernicious gas on wool fiber, obtain good enrichment, thereby pernicious gas obtains many times concentrating on wool fiber, thereby can remedy photocatalysis to the low shortcoming of indoor low concentration pollutant degradation rate, effectively improve light-catalysed efficient, more demonstrate fully the outstanding effect that purifies the air of a room of air filting material of the present invention's preparation.
Description of drawings
Accompanying drawing is the material cord weave fabric looming draft that the present invention prepares.
The specific embodiment
The present invention is described in further detail below by drawings and Examples.
The preparation method of air filting material of the present invention carries out according to the following steps,
A. select for use wool fiber as base material;
B. wool fiber is woven into fabric, fabric adopts the empty latitude method for designing of empty reed through the filling density design, and through close 30/cm, 35/cm of filling density, fabric tissue adopts the cord weave structure;
C. prepare photocatalyst dispersion liquid
It is water-soluble as dispersant to get a certain amount of anion surfactant, adds quantitative nano-TiO after mixing again
2Powder, (0～3000r/min) to (adding a certain amount of polyethylene glycol (PEG20000) again behind 7000～10000r/min) shearings, 20～50min at a high speed by low speed, after ultrasonic wave disperseed 10～20min, (7000～10000r/min) sheared 20～50min, make nano-TiO more at a high speed
2The photocatalysis dispersion liquid;
Anion surfactant can be calgon, dodecyl sodium sulfate or dodecyl bromo myristyl pyridine etc., and the anion surfactant of adding and the gross mass of polyethylene glycol are no more than TiO
21% of quality, wherein the quality of polyethylene glycol should be greater than TiO
20.3%～0.5% of quality.What the present invention used is the ultrasonic cell disruptor of frequency as 20kHZ, and ultrasonic power is controlled in 450～650W.
D. the above-mentioned fabric that is woven into is adopted direct dip coating to carry out the nano-photo catalytic arrangement
At room temperature, the fabric that step b is woven into immerses the nano-TiO that step c makes
2In the photocatalysis dispersion liquid, take out after at least 30 minutes, put into electric drying oven with forced convection then and dry 20min～50min down, promptly make functional air filtering material of the present invention at 50 ℃～90 ℃.
Wool fiber is a kind of natural protein fibre, and according to the morphosis of wool fiber, its outstanding feature is to have the micropore that runs through inside and outside many.Be subjected to the electrostatic field of the unsaturated field of force of wool surface and surface functional group, formaldehyde and other gasiform particulate are easy to be adsorbed.Therefore, wool fiber has the function that purifies air preferably.
The existing physical absorption of the absorption of wool fiber PARA FORMALDEHYDE PRILLS(91,95) also has chemisorbed.When wool fiber contacted with formaldehyde, the lysine in the wool protein amino acid chain, arginine, glutamic acid etc. can produce chemical reaction with formaldehyde, formaldehyde is removed, thereby reached the purpose that purifies air.
Pernicious gases such as wool fiber PARA FORMALDEHYDE PRILLS(91,95) have stronger suction-operated, also can make Degradation Formaldehyde by the chemical composition of itself simultaneously.In addition, wool fiber also has the gas permeability height, resistance is little, dust containing capacity is big, be easy to advantages such as deashing.Therefore, the present invention selects the base material of wool fiber as air filting material for use.
Fabric is adopted the empty latitude design of empty reed through the filling density design, make pck count keep the discontinuity uniformity, through close 30/cm, 35/cm of filling density; Fabric tissue adopts the cord weave structural design.The appropriate design fabric is through filling density, and both mechanical strengths of assurance function air filting material makes filtering material have bigger specific area and fabric breathability preferably again, to guarantee the smooth and easy circulation of air, reduces the resistance of this filtrate; The choose reasonable fabric tissue increases the functional air filtering material specific area, strengthens the adsorbance of functional air filtering material to pernicious gas, the good permeability of this filtrate simultaneously, and resistance is little.
Adopt direct dip coating that air filting material is carried out the nano-photo catalytic arrangement, improved the degradation rate of pernicious gas, and made it have stable photocatalysis effect and good antibacterial functions; The natural characterization of adsorption of wool fiber has improved the efficient of the low concentration unwanted thing of photocatalytic degradation.
Because the nano particle specific area is big, the surface can be high, belong to thermodynamic unstable system, ubiquitous Robert Van de Walle power and Coulomb force in preparation process or last handling process because between particle, thereby surface particle is close together mutually total surface area and surface excess free energy are reduced, nano particle is very easily reunited, and loses due rerum natura of nano particle and function when causing photochemical catalyst finally to be used.The present invention is at direct dip coating preparation of nano TiO
2In the process of photocatalysis dispersion liquid; the surface tension that can reduce nano particle by means of anion surfactant strengthens its wettability; the technology such as ultrasonic wave and emulsification pretreatment that are equipped with again can hinder nano particle well reunites, the stability of protection nano particle.
Add anion surfactant, with the calgon is example, titanium dioxide absorption phosphate anion forms electric double layer, the repulsion potential energy is increased, promptly by the coulomb repulsion effect between the electric double layer, the gravitation of the reunion that takes place between the particle is reduced greatly, agglomerated particle is opened, particle more is tending towards away from each other, realizes the purpose that nanoparticle is disperseed.But, too high hexa metaphosphoric acid na concn, make the electric double layer attenuation of formation, cause particle aggregation once more, do not have the effect of dispersion, through repeatedly experiment, found out the optimum concentration value of dispersant, promptly total consumption of anion surfactant and polyethylene glycol should be no more than 1% of titanium dioxide quality.
Polyethylene glycol (PEG20000) is a kind of non-ionic dispersing agent, and it is water-soluble better having bigger solubility in the aqueous solution.When the addition of polyethylene glycol more after a little while, titanium dioxide granule sticks to macromolecular chain and connects, a dispersant chains the more powder granule of absorption, thereby causes gravitational settling and coagulation does not have peptizaiton.Work as its addition greater than 0.3% of titanium dioxide quality through repeatedly experiment showed,, in the time of especially between 0.4～0.5%, more dispersant adsorption forms the organic hydrophilic diaphragm, thereby plays the spatial stability effect in the powder granule surface.
It mainly is localized hyperthermia, high pressure, strong shock wave and the microjet etc. that produce when utilizing ultrasonic cavitation that ultrasonic wave disperses, nanometer interaction energy between nanoparticle greatly weakens, prevent that effectively the nanoparticle reunion from making it abundant dispersion, but in the time of should avoiding overheated ultrasonic agitation, increase along with heat energy and mechanical energy, the probability of particle collision increases, and causes further reunion on the contrary.What the present invention used is the ultrasonic cell disruptor of frequency as 20kHZ, and ultrasonic power is controlled in 450～650W.
Embodiment 1
With the wool fiber is base material, as follows to the institutional framework design of filtrate:
Design through filling density: the empty latitude design of empty reed has been adopted in the filling density design, through close 30/cm, 35/cm of filling density.
Dobby Weave Design: the 17th～24 warp thread of cord weave selected elastic filament for use, empty 2 reeds between the 20th warp and the 21st warp.Be tensioned state because positive face length latitude flotation line shrinks behind the machine under this tissue fabric like this, make reverse side plain weave expression lobes formation closely raised line.Machine after-contraction under four tabby elastic filament about in adding tissue circulation, vertically the raised line effect is more obvious, has increased the specific area of fabric.This structure also form certain space between the long flotation line of fabric face and the plain weave of reverse side, thereby fabric breathability is better, effectively reduces the resistance of this filtrate except the striped that fabric face rises.
This tissue uses 6 to combine 9
#Reed, 4/dent, looming draft is seen accompanying drawing.
The preparation photocatalyst dispersion liquid
Get quantitative nano-TiO
2Powder, choosing calgon is anion surfactant, measures calgon and polyethylene glycol, the gross mass of calgon and polyethylene glycol is for being no more than TiO
21% of quality, wherein the quality of polyethylene glycol is TiO
20.3% of quality.
Calgon is water-soluble, add nano-TiO after mixing again
2Powder, by 0～3000r/min to 7000～10000r/min, shear 50min, add polyethylene glycol (PEG20000) again, selected frequency is the ultrasonic cell disruptor of 20kHZ, ultrasonic power at 7000r/min down cut 50min, makes nano-TiO after being controlled at and carrying out ultrasonic wave dispersion 10min in 450～650W again
2The photocatalysis dispersion liquid.
At room temperature, the nano-TiO that the step makes is gone up in the fabric immersion that is woven into
2In the photocatalysis dispersion liquid, take out after 40 minutes, put into electric drying oven with forced convection and dry 20min down, promptly make functional air filtering material of the present invention at 90 ℃.
Embodiment 2
Press the step braided fabric of embodiment 1,
The preparation photocatalyst dispersion liquid
Get quantitative nano-TiO
2Powder, choosing dodecyl sodium sulfate is anion surfactant, measures dodecyl sodium sulfate and polyethylene glycol, the gross mass of dodecyl sodium sulfate and polyethylene glycol is for being no more than TiO
21% of quality, wherein the quality of polyethylene glycol is TiO
20.4% of quality.
Dodecyl sodium sulfate is water-soluble, add nano-TiO after mixing again
2Powder, by 0～3000r/min to 7000～10000r/min, shear 20min, add polyethylene glycol (PEG20000) again, selected frequency is the ultrasonic cell disruptor of 20kHZ, ultrasonic power is controlled at and carries out ultrasonic wave dispersion 20min in 450～650W, at 10000r/min down cut 20min, makes nano-TiO again
2The photocatalysis dispersion liquid.
At room temperature, the nano-TiO that the step makes is gone up in the fabric immersion that is woven into
2In the photocatalysis dispersion liquid, take out after 50 minutes, put into electric drying oven with forced convection and dry 50min down, promptly make functional air filtering material of the present invention at 50 ℃.
Embodiment 3
Press the step braided fabric of embodiment 1,
The preparation photocatalyst dispersion liquid
Get quantitative nano-TiO
2Powder, choosing dodecyl bromo myristyl pyridine is anion surfactant, measures dodecyl bromo myristyl pyridine and polyethylene glycol, the gross mass of dodecyl bromo myristyl pyridine and polyethylene glycol is for being no more than TiO
21% of quality, wherein the quality of polyethylene glycol is TiO
20.5% of quality.
Dodecyl bromo myristyl pyridine is water-soluble, add nano-TiO after mixing again
2Powder, by 0～3000r/min to 7000～10000r/min, shear 30min, add polyethylene glycol (PEG20000) again, selected frequency is the ultrasonic cell disruptor of 20kHZ, ultrasonic power is controlled at and carries out ultrasonic wave dispersion 15min in 450～650W, at 8000r/min down cut 30min, makes nano-TiO again
2The photocatalysis dispersion liquid.
At room temperature, the nano-TiO that the step makes is gone up in the fabric immersion that is woven into
2In the photocatalysis dispersion liquid, take out after 60 minutes, put into electric drying oven with forced convection and dry 30min down, promptly make functional air filtering material of the present invention at 70 ℃.
The air filting material that the foregoing description is obtained carries out experimental test:
A. the purification efficiency of formaldehyde (%): testing 1 hour, is that the clean-up effect of the functional air filtering material PARA FORMALDEHYDE PRILLS(91,95) of base material can reach 82.7%～86.3% with the wool fiber;
B. bactericidal effect: staphylococcus aureus, Escherichia coli, white are read the average bacteriostasis rate of coccus all greater than 90%;
C. filter efficiency: compare with common air filting material, increase 30%.
Can reach 6 years service life.
Claims (2)
1. the preparation method based on the functional air filtering material of wool fiber is characterized in that, this method is carried out according to the following steps,
A. select for use wool fiber as base material;
B. wool fiber is woven into fabric, fabric adopts the empty latitude method for designing of empty reed through the filling density design, and through close 30/cm, 35/cm of filling density, fabric tissue adopts the cord weave structure;
C. prepare nano-TiO
2The photocatalysis dispersion liquid,
It is water-soluble as dispersant to get a certain amount of anion surfactant, adds quantitative nano-TiO after mixing again
2Powder by speed 0～3000r/min to 7000～10000r/min down cut 20～50min, adds a certain amount of polyethylene glycol again, and ultrasonic wave is 7000～10000r/min down cut, 20～50min in speed again after disperseing 10～20min, makes nano-TiO
2The photocatalysis dispersion liquid, the gross mass of anion surfactant and polyethylene glycol is no more than TiO
21% of quality, wherein the quality of polyethylene glycol is not less than TiO
20.3% of quality;
D. the above-mentioned fabric that is woven into is adopted direct dip coating to carry out the nano-photo catalytic arrangement
At room temperature, the fabric that step b is woven into immerses the nano-TiO that step c makes
2In the photocatalysis dispersion liquid, take out after at least 30 minutes, put into electric drying oven with forced convection then and dry 20min～50min down, promptly make functional air filtering material of the present invention at 50 ℃～90 ℃.
2. method according to claim 1 is characterized in that, described anion surfactant is selected from calgon, dodecyl sodium sulfate or dodecyl bromo myristyl pyridine.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100183407A CN100509109C (en) | 2007-07-25 | 2007-07-25 | Method for preparing functional air filtering material based on wool fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100183407A CN100509109C (en) | 2007-07-25 | 2007-07-25 | Method for preparing functional air filtering material based on wool fiber |
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| CN100509109C true CN100509109C (en) | 2009-07-08 |
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| CN104988630B (en) * | 2015-06-25 | 2017-01-18 | 苏州迪盛织造整理有限公司 | Fake-doup vertical-lined fabric and manufacturing method of same |
| DE202018102904U1 (en) * | 2018-05-24 | 2018-06-20 | Werner Nüßler | Device for filtering room air |
| CN113457280A (en) * | 2021-07-01 | 2021-10-01 | 杭州净自在环境科技有限公司 | Sugarcoated haws string type antibacterial and antiviral filter screen and manufacturing process thereof |
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Non-Patent Citations (4)
| Title |
|---|
| 应用纳米技术改善针刺非织造空气过滤材料性能的研究. 黄翔，申祚飞，顾群，梁才航.产业用纺织品，第5期. 2006 |
| 应用纳米技术改善针刺非织造空气过滤材料性能的研究. 黄翔，申祚飞，顾群，梁才航.产业用纺织品，第5期. 2006 * |
| 羊毛纤维净化室内空气的实验研究. 王与娟，黄翔，狄育慧.洁净与空调技术，第1期. 2007 |
| 羊毛纤维净化室内空气的实验研究. 王与娟，黄翔，狄育慧.洁净与空调技术，第1期. 2007 * |
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