CN106268038A - A kind of polypropylene electret filter material with high efficiency filter and bactericidal property and preparation method thereof - Google Patents
A kind of polypropylene electret filter material with high efficiency filter and bactericidal property and preparation method thereof Download PDFInfo
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- CN106268038A CN106268038A CN201610803171.7A CN201610803171A CN106268038A CN 106268038 A CN106268038 A CN 106268038A CN 201610803171 A CN201610803171 A CN 201610803171A CN 106268038 A CN106268038 A CN 106268038A
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- polypropylene
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- silicon
- activated carbon
- electret
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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
-
- 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
- B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
- B01D39/1653—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin
-
- 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
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2058—Carbonaceous material the material being particulate
-
- 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
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
- B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
-
- 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
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
-
- 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
- B01D2239/0435—Electret
-
- 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
Abstract
The present invention discloses a kind of polypropylene electret filter material with high efficiency filter and bactericidal property, raw material components by following weight portion: polypropylene 55 65 parts, silicon monoxide 9 14 parts, Powdered Activated Carbon 11 17 parts, 3 aminopropyl triethoxysilane coupling agents 25 parts, glacial acetic acid 0.5 1.5 parts, deionized water is appropriate, low-density polyethylene wax 13 parts, antioxidant 1010 0.5 2 parts, titanate coupling agent 0.6 1.4 parts, silicon dioxide 7 10 parts, far infrared ceramic powder 58 parts.The present invention prepares the silicon nanowires containing α quartz, joins in melt-blown polypropylene electret material, has the filter efficiency of brilliance, also has and significantly suppresses vegetative function；The present invention uses activated carbon supported silicon nanowires after silane coupler processes, and improves the activated carbon load capacity to silicon nanowires, is effectively improved filtering material to the absorption of harmful substance in air.
Description
Technical field
The invention belongs to field of air filtration, be specifically related to a kind of polypropylene electret with high efficiency filter and bactericidal property
Body filtering material and preparation method thereof.
Technical background
Along with the progress in epoch, people are more and more higher to the requirement of environmental quality.But the fast development of economy exacerbates ring
The pollution in border, dust in air, chemical substance, harmful microorganism etc. create harmful effect to the health of people.Therefore, have
The harmful substance that effect controls in air is to have significant problem to be solved.The application of air filter and filtering material is to purify sky
The important means of gas.Normal air filtering material is thorough not for the removal of fine particles, and easily grows on filtering material
, there is the possibility of secondary pollution in raw harmful microorganism.Electret air filtering material provides possibility for solving this difficult problem.
Electret air filtering material has efficiently, low-resistance, the advantage such as energy-conservation, antibacterial, is that a class has application prospect very much
Novel air filtering material.The number of electret carried charge and charge decay speed will largely affect product
Performance and used life, adds the chargeability that can improve electret in electret filter material by inorganic or organic additive,
Improve the strainability of electret filter material.
Fault Rong Hui, Shao Mingwang et al. have studied in " silicon-carbon nano material applied research in nano generator " literary composition
Silicon nanowires application in nano generator, because containing this good piezoelectric of alpha-quartz so that silicon in silicon nanowires
Nano wire shows fabulous electret effect with electrostatic charge so that it is be applied to the exploitation of nano generator.
Therefore, utilizing this characteristic of silicon nanowires, the present invention is applied to electret air filtering field, is received by silicon
Rice noodle adds in filtering material, improves the electret performance of electret air filtering material, improves the chargeability of electret, improves
The strainability of electret filter material.
Summary of the invention
Not enough for prior art, the present invention provides a kind of polypropylene electret mistake with high efficiency filter and bactericidal property
Filtering material and preparation method thereof.
A kind of polypropylene electret filter material with high efficiency filter and bactericidal property, by the raw material group of following weight portion
Point: polypropylene 55-65 part, silicon monoxide 9-14 part, Powdered Activated Carbon 11-17 part, 3-aminopropyl triethoxysilane coupling agent
2-5 part, glacial acetic acid 0.5-1.5 part, deionized water is appropriate, low-density polyethylene wax 1-3 part, antioxidant 1010 0.5-2 part, titanium
Acid esters coupling agent 0.6-1.4 part, silicon dioxide 7-10 part, far infrared ceramic powder 5-8 part.
Specifically comprise the following steps that
(1) preparation of silicon nanowires:
1., the little porcelain boat that will be equipped with silicon monoxide powder be placed horizontally in the middle of alumina tube, then this pipe is placed on high-temperature pipe
In formula stove, temperature, at 80-100Pa, is then increased to 100-200,800-1100 DEG C and is incubated 50-70 respectively by evacuation respectively
Minute, it is warmed up to 1300-1400 DEG C afterwards and is incubated 3-5 hour；
2. cool to 550-650 DEG C, afterwards with the speed of 1-3 DEG C/min and be incubated 20-40 minute, blasting sky with 50sccm simultaneously
Gas, to furnace chamber, naturally cools to room temperature, obtains silicon nanowires, standby；
(2) preparation of activated carbon supported silicon nanowires:
1., by 3-aminopropyl triethoxysilane coupling agent join deionized water, and regulate pH to 4 with a small amount of glacial acetic acid,
Stir 20-40 minute under room temperature, add the silicon nanowires that step (1) obtains afterwards, little 80-100 DEG C of back flow reaction 11-13
Time, sucking filtration, wash, be dried, obtain silicon amide nanowire composite；
2., the silicon amide nanowire composite obtained, Powdered Activated Carbon are joined deionized water, with ultrasound wave 40 DEG C,
Under conditions of 150W mix 20-40 minute, aging 24 hours of standing at room temperature, with deionized water clean repeatedly to effluent in
Property, 110-120 DEG C dry 10-14 hour to constant weight, then be placed in Muffle furnace 380-420 DEG C of roasting 3-5 hour, cool down, be dried,
Prepare activated carbon supported silicon nanowires；
(3) prepared by polypropylene composite materials master batch:
Activated carbon supported silicon nanowires prepared by step (2) is put in super mixer, adds low-density polyethylene wax, antioxygen
Agent 1010 and titanate coupling agent, take out after being sufficiently stirred for, freeze-day with constant temperature 1-3 hour under the conditions of 100-110 DEG C, afterwards will
The silicon nanowires that surface is handled well adds twin screw with silicon dioxide, far infrared ceramic powder and remaining 1/2 part of polypropylene and joins
Mixed extruder melt extrudes, and cools down through water-bath, cuts granulating, obtains polypropylene composite materials master batch；
(4) melt-blown preparation technology:
1., polypropylene composite materials master batch is mixed homogeneously with remaining polypropylene, feeds spinneret with dosing pump in the molten state,
The temperature of control extruder is at 200-260 DEG C, and the temperature of spinneret is at 230-290 DEG C, and the FREQUENCY CONTROL of dosing pump is at 20-
30Hz, extrudes above-mentioned solution from spinneret orifice；
2., with high velocity, hot air, the melt of extrusion spinneret orifice is blown out ultra-fine fiber so that it is fly to solidifying lace curtaining and cool down bonding
Form fibre web；
(5) fibre web step (4) the obtained electrode by corona discharge assembly, electrode discharge makes fibre web electret, obtains a kind of
There is the polypropylene electret filter material of high efficiency filter and bactericidal property.
Wherein, described electret positive polarity selects 20-50KV, cathode voltage selection-10-30KV, and electret distance is 5-
20cm。
Compared with prior art, the invention have the advantages that
(1) present invention prepares the silicon nanowires containing alpha-quartz, owing to the volumetric expansion in alpha-quartz forming process is by outer layer
Amorphous silica limit and make alpha-quartz create piezoelectric effect, the electric charge of generation is stored in outer layer simultaneously and has good
In the amorphous silica layer of good electric charge storge quality, thus show good electret behavior, by the silicon nanometer of preparation
Line joins in melt-blown polypropylene electret material, has both characteristics concurrently, greatly improves electret air filtering material
Charge stability, reduce the filtration resistance of filtering material, have brilliance filter efficiency, meanwhile, electret formed
Highfield also each bacterioid is had function of significantly its breeding of suppression.
(2) activated carbon has abundant pore structure and unique chemical functional group, is environmentally friendly superior adsorbent,
The present invention uses activated carbon supported silicon nanowires after silane coupler processes, and improves the activated carbon load to silicon nanowires
Amount, both are compounding uses and can be effectively improved filtering material to the absorption of harmful substance in air, makes product have the mistake of excellence
Filter performance.
(3) far infrared ceramic powder can generate OH under ultraviolet irradiates-, additionally silicon dioxide is because of the electrostatic of himself
Field can make the hydrone of surrounding be electrolysed at any time, becomes H+And OH-Ion, OH-Ion and other hydrone can form alkalescence hydroxyl
Base anion, can effectively remove benzene, formaldehyde, sulfide, ammonia and the stink substance of indoor, and have sterilizing function.
Detailed description of the invention
A kind of polypropylene electret filter material with high efficiency filter and bactericidal property, by the raw material group of following weight portion
Point: polypropylene 60, silicon monoxide 11, Powdered Activated Carbon 14,3-aminopropyl triethoxysilane coupling agent 4, glacial acetic acid 1, go from
Sub-water is appropriate, low-density polyethylene wax 2, antioxidant 1010 1.5, titanate coupling agent 0.9, silicon dioxide 8, far-infrared ceramic
Powder 6.
Specifically comprise the following steps that
(1) preparation of silicon nanowires:
1., the little porcelain boat that will be equipped with silicon monoxide powder be placed horizontally in the middle of alumina tube, then this pipe is placed on high-temperature pipe
In formula stove, temperature, at 100Pa, is then increased to 200,900 DEG C and is incubated 60 minutes respectively, being warmed up to afterwards by evacuation respectively
1200 DEG C are incubated 4 hours；
2. cool to 600 DEG C, afterwards with the speed of 2 DEG C/min and be incubated 30 minutes, simultaneously blasting air to furnace chamber with 50sccm,
Naturally cool to room temperature, obtain silicon nanowires, standby；
(2) preparation of activated carbon supported silicon nanowires:
1., by 3-aminopropyl triethoxysilane coupling agent join deionized water, and regulate pH to 4 with a small amount of glacial acetic acid,
Stir 30 minutes under room temperature, add the silicon nanowires that step (1) obtains afterwards, 90 DEG C of back flow reaction 12 hours, sucking filtration, wash
Wash, be dried, obtain silicon amide nanowire composite；
2., the silicon amide nanowire composite obtained, Powdered Activated Carbon are joined deionized water, with ultrasound wave 40 DEG C,
Under conditions of 150W mix 30 minutes, aging 24 hours of standing at room temperature, with deionized water clean repeatedly to effluent be neutrality,
110 DEG C dry 12 hours to constant weight, then be placed in Muffle furnace 400 DEG C of roastings 4 hours, cool down, be dried, prepare activated carbon supported silicon
Nano wire；
(3) prepared by polypropylene composite materials master batch:
Activated carbon supported silicon nanowires prepared by step (2) is put in super mixer, adds low-density polyethylene wax, antioxygen
Agent 1010 and titanate coupling agent, take out after being sufficiently stirred for, and freeze-day with constant temperature 2 hours under the conditions of 105 DEG C, afterwards by surface
The silicon nanowires managed adds twin screw compounding extrusion with silicon dioxide, far infrared ceramic powder and remaining 1/2 part of polypropylene
Machine melt extrudes, and cools down through water-bath, cuts granulating, obtains polypropylene composite materials master batch；
(4) melt-blown preparation technology:
1., polypropylene composite materials master batch is mixed homogeneously with remaining polypropylene, feeds spinneret with dosing pump in the molten state,
The temperature of control extruder is at 240 DEG C, and the temperature of spinneret is at 280 DEG C, and the FREQUENCY CONTROL of dosing pump is at 30Hz, by above-mentioned solution
Extrude from spinneret orifice；
2., with high velocity, hot air, the melt of extrusion spinneret orifice is blown out ultra-fine fiber so that it is fly to solidifying lace curtaining and cool down bonding
Form fibre web；
(5) fibre web step (4) the obtained electrode by corona discharge assembly, electrode discharge makes fibre web electret, obtains a kind of
There is the polypropylene electret filter material of high efficiency filter and bactericidal property.
Wherein, described electret positive polarity selects 40KV, cathode voltage selection-20KV, and electret distance is 10cm.
Properties of product test result: air penetrability: 107.4L/m2.S ；Strongly 27.7CD；The pressure loss: 88.43Pa；Cross
Filter efficiency: 99.98%(filter efficiency is more than the particle of 0.3 μm for particle diameter).
Claims (3)
1. a polypropylene electret filter material with high efficiency filter and bactericidal property, it is characterised in that by following weight
The raw material components of part: polypropylene 55-65 part, silicon monoxide 9-14 part, Powdered Activated Carbon 11-17 part, 3-aminopropyl-triethoxy
Silane coupler 2-5 part, glacial acetic acid 0.5-1.5 part, deionized water is appropriate, low-density polyethylene wax 1-3 part, antioxidant 1010
0.5-2 part, titanate coupling agent 0.6-1.4 part, silicon dioxide 7-10 part, far infrared ceramic powder 5-8 part.
The system of a kind of polypropylene electret filter material with high efficiency filter and bactericidal property the most according to claim 1
Preparation Method, it is characterised in that specifically comprise the following steps that
(1) preparation of silicon nanowires:
1., the little porcelain boat that will be equipped with silicon monoxide powder be placed horizontally in the middle of alumina tube, then this pipe is placed on high-temperature pipe
In formula stove, temperature, at 80-100Pa, is then increased to 100-200,800-1100 DEG C and is incubated 50-70 respectively by evacuation respectively
Minute, it is warmed up to 1300-1400 DEG C afterwards and is incubated 3-5 hour；
2. cool to 550-650 DEG C, afterwards with the speed of 1-3 DEG C/min and be incubated 20-40 minute, blasting sky with 50sccm simultaneously
Gas, to furnace chamber, naturally cools to room temperature, obtains silicon nanowires, standby；
(2) preparation of activated carbon supported silicon nanowires:
1., by 3-aminopropyl triethoxysilane coupling agent join deionized water, and regulate pH to 4 with a small amount of glacial acetic acid,
Stir 20-40 minute under room temperature, add the silicon nanowires that step (1) obtains afterwards, little 80-100 DEG C of back flow reaction 11-13
Time, sucking filtration, wash, be dried, obtain silicon amide nanowire composite；
2., the silicon amide nanowire composite obtained, Powdered Activated Carbon are joined deionized water, with ultrasound wave 40 DEG C,
Under conditions of 150W mix 20-40 minute, aging 24 hours of standing at room temperature, with deionized water clean repeatedly to effluent in
Property, 110-120 DEG C dry 10-14 hour to constant weight, then be placed in Muffle furnace 380-420 DEG C of roasting 3-5 hour, cool down, be dried,
Prepare activated carbon supported silicon nanowires；
(3) prepared by polypropylene composite materials master batch:
Activated carbon supported silicon nanowires prepared by step (2) is put in super mixer, adds low-density polyethylene wax, antioxygen
Agent 1010 and titanate coupling agent, take out after being sufficiently stirred for, freeze-day with constant temperature 1-3 hour under the conditions of 100-110 DEG C, afterwards will
The silicon nanowires that surface is handled well adds twin screw with silicon dioxide, far infrared ceramic powder and remaining 1/2 part of polypropylene and joins
Mixed extruder melt extrudes, and cools down through water-bath, cuts granulating, obtains polypropylene composite materials master batch；
(4) melt-blown preparation technology:
1., polypropylene composite materials master batch is mixed homogeneously with remaining polypropylene, feeds spinneret with dosing pump in the molten state,
The temperature of control extruder is at 200-260 DEG C, and the temperature of spinneret is at 230-290 DEG C, and the FREQUENCY CONTROL of dosing pump is at 20-
30Hz, extrudes above-mentioned solution from spinneret orifice；
2., with high velocity, hot air, the melt of extrusion spinneret orifice is blown out ultra-fine fiber so that it is fly to solidifying lace curtaining and cool down bonding
Form fibre web；
(5) fibre web step (4) the obtained electrode by corona discharge assembly, electrode discharge makes fibre web electret, obtains a kind of
There is the polypropylene electret filter material of high efficiency filter and bactericidal property.
The system of a kind of polypropylene electret filter material with high efficiency filter and bactericidal property the most according to claim 2
Preparation Method, it is characterised in that electret positive polarity selects 20-50KV, cathode voltage selection-10-30KV, and electret distance is 5-
20cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610803171.7A CN106268038A (en) | 2016-09-06 | 2016-09-06 | A kind of polypropylene electret filter material with high efficiency filter and bactericidal property and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610803171.7A CN106268038A (en) | 2016-09-06 | 2016-09-06 | A kind of polypropylene electret filter material with high efficiency filter and bactericidal property and preparation method thereof |
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| CN106268038A true CN106268038A (en) | 2017-01-04 |
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| CN201610803171.7A Pending CN106268038A (en) | 2016-09-06 | 2016-09-06 | A kind of polypropylene electret filter material with high efficiency filter and bactericidal property and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107574494A (en) * | 2017-08-31 | 2018-01-12 | 常州欧康铭化工有限公司 | A kind of preparation method of antibacterial air-filtering fiber |
| CN111321516A (en) * | 2020-04-02 | 2020-06-23 | 青岛科凯达橡塑有限公司 | Long-acting electret PP (polypropylene) non-woven fabric and preparation method thereof |
| CN112941723A (en) * | 2021-01-26 | 2021-06-11 | 南京捷纳思新材料有限公司 | Preparation method of electret treated modified polypropylene melt-blown fabric |
| CN115387024A (en) * | 2022-08-29 | 2022-11-25 | 上海水梵科技集团有限公司 | Antibacterial melt-blown fabric |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1718910A (en) * | 2005-07-18 | 2006-01-11 | 天津工业大学 | Modified polypropylene mother particle for melt spray, its preparation method and use |
-
2016
- 2016-09-06 CN CN201610803171.7A patent/CN106268038A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1718910A (en) * | 2005-07-18 | 2006-01-11 | 天津工业大学 | Modified polypropylene mother particle for melt spray, its preparation method and use |
Non-Patent Citations (1)
| Title |
|---|
| 阙荣辉: "硅碳纳米材料在纳米发电机中的应用研究", 《中国博士学位论文全文数据库工程科技II辑（月刊）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107574494A (en) * | 2017-08-31 | 2018-01-12 | 常州欧康铭化工有限公司 | A kind of preparation method of antibacterial air-filtering fiber |
| CN111321516A (en) * | 2020-04-02 | 2020-06-23 | 青岛科凯达橡塑有限公司 | Long-acting electret PP (polypropylene) non-woven fabric and preparation method thereof |
| CN112941723A (en) * | 2021-01-26 | 2021-06-11 | 南京捷纳思新材料有限公司 | Preparation method of electret treated modified polypropylene melt-blown fabric |
| CN115387024A (en) * | 2022-08-29 | 2022-11-25 | 上海水梵科技集团有限公司 | Antibacterial melt-blown fabric |
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