CN103341289B - Preparation method of nano-TiO2-loaded terylene-needled filtering material - Google Patents
Preparation method of nano-TiO2-loaded terylene-needled filtering material Download PDFInfo
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- CN103341289B CN103341289B CN201310317790.1A CN201310317790A CN103341289B CN 103341289 B CN103341289 B CN 103341289B CN 201310317790 A CN201310317790 A CN 201310317790A CN 103341289 B CN103341289 B CN 103341289B
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Abstract
The invention discloses a preparation method of a nano-TiO2-loaded terylene-needled filtering material. The preparation method is characterized by comprising the following process steps of: (1) preparing a nano-TiO2 stable-water dispersing solution; (2) preparing a nano TiO2/PTFE (Poly Tetra Fluoro Ethylene) composite finishing solution; (3) pretreating a needled filtering material; and (4) completely impregnating the needled filtering material obtained in the step (3) into the composite finishing solution prepared in the step (2) by adopting an impregnation method to obtain the nano-TiO2-loaded terylene-needled filtering material with a photocatalytic function. The preparation method disclosed by the invention has the advantages that measured by a photocatalytic degradation experiment, the photocatalytic degradation rate of the nano-TiO2-loaded terylene-needled filtering material to a methylene blue solution can reach more than 90%, and the once filtering and degradation rate of the nano-TiO2-loaded terylene-needled filtering material to formaldehyde is near 50%. The preparation method can be used for purifying air, treating sewage and the like. According to the preparation method, the functional needled filtering material with simple process and excellent photocatalytic effect can be obtained.
Description
Technical field
The present invention relates to a kind of loaded with nano TiO
2the preparation method of terylene needle punched filter material, belongs to environmental technology field.
Background technology
Needle punched nonwovens preparation forms random packing of fibers, the netted structure of layer stereo, hole is little and non-woven material that porosity is large, the two-dimensional structure filtrate that ratio woven fabric is made has more superior strainability, and the infiltration of powder dust particle to deep layer can be contained, be therefore widely used in filtration art.But because problem of environmental pollution is increasingly serious; inevitable requirement is improving the structure of acupuncture filter material; while improving the filter efficiency to small size particle, more need development & application functional filter material, to meet the requirement to air quality control, environmental protection.
Nano-TiO
2possess higher chemical stability, photocatalysis characteristic, heat endurance, the performance such as nontoxic, under visible ray or ultraviolet irradiation, bring out photochemical reaction, by organic substance decomposing.Especially since the nineties in 20th century, TiO
2photocatalysis technology obtains larger development at the field of Environment Protection of the organic and inorganic pollutant of catalytic degradation water or gas phase.TiO
2catalytic action not only can effectively degrade vehicle exhaust, industrial waste gas, finishing living environment produce the pollutant such as formaldehyde, acetic acid, carbon monoxide, kitchen smog, can also be oxidized in ozone be difficult to be oxidized organic matter as chloroform, carbon tetrachloride, hexachloro-benzene etc.TiO
2be applied to needling non-woven filtering material, make common filtering material possess effective photocatalysis performance, be used widely purification of air, sewage disposal, antifouling and antibiosis etc. are multi-field, become a kind of environmental improvement method with important application prospect.
The filter efficiency of needle punched filter material, cost, service life, and functional development & application are the main development directions of current needle punched filter material.The mode of functional topical finishing is widely used in the performance improving non-woven filter material.Adopt infusion process to give needle punched filter material functional, nano-photocatalyst material is carried on needle punched filter material, for its application in aqueous phase, gas phase filtration etc. brings new opportunity.But the Developing Application still having some limiting factors to fill a prescription as finishing agent, hinders photocatalysis filtering material and realizes suitability for industrialized production.By preparing nano-TiO
2dispersion liquid, in conjunction with the use of PTFE emulsion and adhesive, be applied to needle punched filter material improving media performance, to give the report of photo-catalysis function little.Nano-TiO on the one hand
2be carried on securely on needle punched filter material under the effect of adhesive, give full play to functional, photocatalysis technology is made the most of the advantage at the field of Environment Protection such as air filtration, sewage disposal; PTFE emulsion has good self-cleaning property on the other hand, improves filtrate deashing property, extends cleaning cycle, improves service efficiency.Loaded with nano TiO
2the development of needle punched filter material and suitability for industrialized production thereof have great application prospect filtration, environmental protection etc. are multi-field.
Summary of the invention
The object of the present invention is to provide the loaded with nano TiO that a kind of simple process, photocatalysis performance are superior
2the preparation method of terylene needle punched filter material.
Technical scheme of the present invention is configuration nano-TiO
2/ PTFE composite finishing liquid, utilizes infusion process by nano-TiO
2be carried on terylene needle punched filter material, obtain a kind of needle punched filter material possessing photo-catalysis function.Step is as follows:
(1) mark meter by weight, gets 100 parts of water, adds 1 ~ 2 part of TiO
2nano-powder, and add 0.1 ~ 0.3 part of silane coupler in wherein carrying out stirring, modification, then get 0.5 ~ 1 part of calgon (SHMP) and 0.1 ~ 0.5 part of neopelex (SDBS) joins in solution, prior to magnetic stirring apparatus stirs 20 ~ 50min, be placed in ultrasonic cleaning machine ultrasonic disperse 30 ~ 60min again, obtain finely dispersed nano-TiO
2aqueous dispersions.
(2) step (1) gained nano-TiO is got
2aqueous dispersions 200 ~ 800 parts, adds 30 ~ 50 parts of PTFE emulsion, the adhesive of 80 ~ 100 parts and 80 ~ 1000 parts of deionized waters, and ultrasonic disperse is even, obtains nano-TiO
2/ PTFE composite finishing liquid.
(3) getting terylene needle punched filter material is immersed in containing in the NaOH of 10 ~ 30g/L and 1 ~ 10g/L bleeding agent mixed solution, by bath raio 10 ~ 20: 1, at bath temperature 80 ~ 100 DEG C after soda boiling 30 ~ 60min, takes out and cleans and dry stand-by.
(4) nano-TiO that the terylene needle punched filter material thorough impregnation after step (3) being processed configures in step (2)
2/ PTFE composite finishing liquid, makes its thorough impregnation fully adsorb, after taking-up on padding machine mangle, cure in shaping drying, obtain described photo-catalysis function needle punched filter material.Wherein bath raio is 10 ~ 20: 1, and pick-up is 70% ~ 80%, and stoving temperature is 150 ~ 180 DEG C, and the time of curing is 2 ~ 5min, obtained loaded with nano TiO
2terylene needle punched filter material.
Cut out 5cm × 10cm loaded with nano TiO
2terylene needle punched filter material and 5cm × 10cm control sample are placed in 10mg/L methylene blue solution respectively, carry out the ultraviolet irradiation of certain hour in photocatalytic system.Methylene blue solution after 20min takes out illumination, the absorbance at wavelength 664nm place take water as its absorbance of reference measurement.Absorbance change before and after contrast illumination, calculates the degradation rate of methylene blue.
Cut out 50cm
2loaded with nano TiO
2terylene needle punched filter material and 50cm
2control sample, carries out formaldehyde gas Degrading experiment.Self-control Photo-Catalytic Degradation of Formaldehyde experimental rig, as Fig. 1, is made up of air extractor, formaldehyde gas generating portion, light-catalyzed reaction part and residual gas absorption portion.In conical flask, add 10ml formalin, add 50ml deionized water in bottle,suction, sample is positioned in glass device by ultra violet lamp.During vacuum air pump work, bottle,suction and flask internal gas pressure reduce, and formaldehyde constantly volatilizees, and gas finally flow in bottle,suction soluble in water by sample.Start vavuum pump 5 times, every minor tick 2min.According to HJ601-2011 " the mensuration acetylacetone,2,4-pentanedione AAS of water quality formaldehyde ", the aqueous solution 5ml extracted in bottle,suction mixes with 5ml acetylacetone,2,4-pentanedione reagent, seals, and is placed in 60 DEG C of water-baths and heats 15min, be cooled to normal temperature after taking-up.Wavelength 414nm place take water as reference measurement absorbance.According to the variance analysis Degradation Formaldehyde rate of absorbance.
Loaded with nano TiO prepared by the present invention
2terylene needle punched filter material is compared with general acupuncture filtrate, and while possessing photocatalysis functional, aperture obtains controlling to a certain extent, filter efficiency increases.Loaded with nano TiO
2the percent of decolourization of terylene needle punched filter material photocatalytic degradation methylene blue solution reaches more than 90%, and PARA FORMALDEHYDE PRILLS(91,95) gas once filters degradation rate close to 50%.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments only do not limit the scope of the invention for illustration of the present invention.In addition should be understood that those skilled in the art can to the various change of the present invention or amendment, and these equivalent form of values fall into claims limited range appended by the application equally after the content of having read the present invention's instruction.
Embodiment 1
Get 100 parts of water, add 1 ~ 2 part of TiO
2nano-powder, and add 0.1 ~ 0.3 part of silane coupler in wherein carrying out stirring, modification, then get 0.5 ~ 1 part of calgon (SHMP) and 0.1 ~ 0.5 part of neopelex (SDBS) joins in solution, prior to magnetic stirring apparatus stirs 20 ~ 50min, be placed in ultrasonic cleaning machine ultrasonic disperse 30 ~ 60min again, obtain finely dispersed nano-TiO
2aqueous dispersions.This nano-TiO
2aqueous dispersions grain-size graph is shown in Fig. 2.
Embodiment 2
Terylene needle punched filter material is immersed in the mixed solution containing NaOH and the 5g/L bleeding agent of 25g/L, by bath raio 20: 1, at bath temperature 100 DEG C after soda boiling 60min, takes out and clean and dry stand-by.Prepare nano-TiO
2/ PTFE composite finishing liquid, wherein nano-TiO
2aqueous dispersions 800g/L, PTFE emulsion 35g/L, adhesive 97g/L, deionized water 80g/L.By the needle punched filter material through pre-treatment by bath raio 10: 1, be completely infused in this composite finishing liquid, in shaping drying, cure drying, obtain described photo-catalysis function needle punched filter material 1#.This sample transmission electron microscope-X-ray energy spectrum figure (EDAX) is shown in Fig. 3; Scanning electron microscope diagram (SEM) is shown in Fig. 4, and photocatalytic degradation methylene blue solution percent of decolourization figure is shown in Fig. 5, and formaldehyde gas once filters degradation property in table 1.
Embodiment 3
Adopt the method identical with example 1 to carry out pre-treatment to terylene needle punched filter material, and prepare the nano-TiO of solid content 1%
2aqueous dispersions.
Prepare nano-TiO
2/ PTFE composite finishing liquid, wherein nano-TiO
2aqueous dispersions 600g/L, PTFE emulsion 35g/L, adhesive 97g/L, deionized water 280g/L.Flood by the same way of example 1 and cure sample, obtaining contrast sample 2#.Photocatalytic degradation methylene blue solution percent of decolourization figure is shown in Fig. 5, and formaldehyde gas once filters degradation property in table 1.
Prepare nano-TiO
2/ PTFE composite finishing liquid, wherein nano-TiO
2aqueous dispersions 400g/L, PTFE emulsion 35g/L, adhesive 97g/L, deionized water 480g/L.Flood by the same way of example 1 and cure sample, obtaining contrast sample 3#.Photocatalytic degradation methylene blue solution percent of decolourization figure is shown in Fig. 5, and formaldehyde gas once filters degradation property in table 1.
Prepare nano-TiO
2/ PTFE composite finishing liquid, wherein nano-TiO
2aqueous dispersions 200g/L, PTFE emulsion 35g/L, adhesive 97g/L, deionized water 680g/L.Flood by the same way of example 1 and cure sample, obtaining contrast sample 4#.Photocatalytic degradation methylene blue solution percent of decolourization figure is shown in Fig. 5, and formaldehyde gas once filters degradation property in table 1.
Prepare nano-TiO
2/ PTFE composite finishing liquid, wherein nano-TiO
2aqueous dispersions 0g/L, PTFE emulsion 35g/L, adhesive 97g/L, deionized water 880g/L.Flood by the same way of example 1 and cure sample, obtaining contrast sample 5#.Photocatalytic degradation methylene blue solution percent of decolourization figure is shown in Fig. 5, and formaldehyde gas once filters degradation property in table 1.
Table 1 loaded with nano TiO
2terylene needle punched filter material degradation of formaldehyde gas performance
Accompanying drawing explanation
Fig. 1 is Photo-Catalytic Degradation of Formaldehyde experimental provision schematic diagram
Fig. 2 is nano-TiO of the present invention
2aqueous dispersions particle size dispersion figure
Fig. 3 loaded with nano TiO
2terylene needle punched filter material EDAX spectrogram
Fig. 4 is loaded with nano TiO of the present invention
2terylene needle punched filter material SEM schemes
Fig. 5 is loaded with nano TiO of the present invention
2terylene needle punched filter material degradation of methylene blue solution property
Table 1 is loaded with nano TiO of the present invention
2terylene needle punched filter material degradation of formaldehyde gas performance
Wherein 1-boiling flask; 2-bottle,suction; 3-tongs; 4-vacuum air pump; 5-uviol lamp; A-formalin; B-laboratory sample; C-deionized water
Claims (3)
1. a loaded with nano TiO
2the preparation method of terylene needle punched filter material, is characterized in that: preparation of nano TiO
2/ PTFE composite finishing liquid, utilizes infusion process by nano-TiO
2be carried on terylene needle punched filter material, comprise following processing step:
(1) mark meter by weight, gets 100 parts of water, adds 1 ~ 2 part of TiO
2nano-powder, and add 0.1 ~ 0.3 part of silane coupler in wherein carrying out stirring, modification, then get 0.5 ~ 1 part of calgon (SHMP) and 0.1 ~ 0.5 part of neopelex (SDBS) joins in solution, prior to magnetic stirring apparatus stirs 20 ~ 50min, be placed in ultrasonic cleaning machine ultrasonic disperse 30 ~ 60min again, obtain finely dispersed nano-TiO
2aqueous dispersions;
(2) step (1) gained nano-TiO is got
2aqueous dispersions 200 ~ 800 parts, adds 30 ~ 50 parts of PTFE emulsion, the adhesive of 80 ~ 100 parts and 80 ~ 1000 parts of deionized waters, and ultrasonic disperse is even, obtains nano-TiO
2/ PTFE composite finishing liquid;
(3) getting terylene needle punched filter material is immersed in containing in the NaOH of 10 ~ 30g/L and 1 ~ 10g/L bleeding agent mixed solution, by bath raio 10 ~ 20: 1, at bath temperature 80 ~ 100 DEG C after soda boiling 30 ~ 60min, takes out and cleans and dry stand-by;
(4) nano-TiO that the terylene needle punched filter material thorough impregnation after step (3) being processed configures in step (2)
2/ PTFE composite finishing liquid, its thorough impregnation is fully adsorbed, after taking-up on padding machine mangle, cure in shaping drying, obtain photo-catalysis function needle punched filter material, wherein bath raio is 10 ~ 20: 1, pick-up is 70% ~ 80%, stoving temperature is 150 ~ 180 DEG C, and the time of curing is 2 ~ 5min, obtained loaded with nano TiO
2terylene needle punched filter material.
2. a kind of loaded with nano TiO according to claim 1
2the preparation method of terylene needle punched filter material, that it is characterized in that simple process, that photocatalysis effect is good needle punched filter material.
3. loaded with nano TiO according to claim 1
2the preparation method of terylene needle punched filter material, the method is also applicable to the processing of other various non-woven filtrates.
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| CN104862949A (en) * | 2015-05-20 | 2015-08-26 | 江苏腾盛纺织科技集团有限公司 | Seamless sticking wall cloth with formaldehyde purification function and preparation method of seamless sticking wall cloth |
| CN104846623A (en) * | 2015-05-20 | 2015-08-19 | 江苏腾盛纺织科技集团有限公司 | Light shading curtain cloth with formaldehyde purification function and preparing method thereof |
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| CN110055699A (en) * | 2019-05-13 | 2019-07-26 | 江苏菲斯特滤料有限公司 | A kind of final finishing device of filtering material |
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| CN115382387A (en) * | 2022-08-03 | 2022-11-25 | 厦门中创环保科技股份有限公司 | Manufacturing process of formaldehyde-removing felt and formaldehyde-removing felt |
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