CN103394296B - A kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR and preparation method thereof - Google Patents
A kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR and preparation method thereof Download PDFInfo
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- CN103394296B CN103394296B CN201310308767.6A CN201310308767A CN103394296B CN 103394296 B CN103394296 B CN 103394296B CN 201310308767 A CN201310308767 A CN 201310308767A CN 103394296 B CN103394296 B CN 103394296B
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 68
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 68
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 33
- 238000001914 filtration Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001723 curing Methods 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000004381 surface treatment Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000005238 degreasing Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000004809 Teflon Substances 0.000 claims description 6
- 229920006362 Teflon® Polymers 0.000 claims description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000006424 Flood reaction Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000845 anti-microbial effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 48
- 210000004379 membrane Anatomy 0.000 description 22
- 239000011148 porous material Substances 0.000 description 4
- 229920001410 Microfiber Polymers 0.000 description 3
- 239000003658 microfiber Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR and preparation method thereof.The present invention includes following technical step: (1) batch mixing; (2) base; (3) extrude; (4) roll; (5) longitudinal stretching after ungrease treatment; (6) longitudinal stretching after surface treatment; (7) sintering curing after cross directional stretch; (8) combination process and hydrophilic treated.Compared with prior art, the present invention has following beneficial effect: (1) preparation-obtained polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR has the performances such as good mechanical strength, chemical stability, heat resistance, weatherability, uvioresistant and antimicrobial erosion.(2) the average aperture of polytetrafluoroethylene (PTFE) ultra micro water filtration film is 0.3-0.5 micron, and porosity is 85%, is greater than 5 cubic metres/square ms/h.
Description
Technical field
The invention belongs to water filtration technical field of membrane, more specifically relate to a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR and preparation method thereof.
Background technology
Polytetrafluoroethylene (PTFE) (referred to as PTFE) microporous barrier is by shaping rod, the band of polytetrafluoroethylextruded extruded, through being rolled into the semi-finished product of film, after the temperature tensile below fusing point, thermal finalization, and the porous article obtained.
Poly tetrafluoroethylene has following micro-structural:
(1) PTFE microporous membrane configuration of surface has araneose microcellular structure.Form hole between microfibre, microfibre orientation is substantially parallel with draw direction; The junction of fibre bundle is node, and it is tangled by many microfibres to be connected to form.
(2) PTFE film belongs to asymmetric membrane, and the positive and negative pore size of film is variant.
(3) the cross section pore size of film is larger than the pore size on its surface, and also have difference to pore size in length and breadth, longitudinal micropore is greater than transverse direction.
(4) cross section of film is a kind of network structure, the three-dimensional structure in hole has netted connection, a very complicated change such as hole is bushing, duct bends, and may form a passage by multiple micropore, also likely a micropore is connected with multiple passage.
Microporous teflon membran is a kind of pliable and tough and whippy poromerics, and porosity is high, even aperture distribution, has the characteristic of permeable watertight, can be used as the ultra-clean filter membrane etc. of sterilization filter membrane, electrolyte membrane, gas dialysis membrane, various solvent.Microporous teflon membran is pasted onto on fabric can make anorak, ventilative tent, raincoat etc.
MBR(membrane bioreactor) be the treatment system supermicro filtration membrane assembly in membrane separation technique being combined with the bioreactor in Sewage Biological Treatment and is formed.Efficient centrifugation due to film makes MBR have outstanding advantages not available for many traditional biological treatment process, effluent quality good stable, can direct reuse, volumetric loading is high, and floor space is little, and whole system flow process is compact, excess sludge production is little, and operational management is convenient.So MBR to be specially adapted to effluent quality requirement high, process water outlet has reuse requirement, and engineering land used is more nervous, and in high-concentration hardly-degradable field of industrial waste water treatment.Membrane material is the core component in MBR technology, membrane material at present for MBR has hollow fiber form and flat two kinds, and the MBR of the MBR opposite hollow fibrous material of flat membrane material has that higher antipollution, cleaning frequency membrane are low, long service life, individual advantage such as replaceable.The membrane material of flat MBR has this different materials of Kynoar, polyether sulfone, polysulfones, polyvinyl chloride on the market, and often kind of material has respective performance, not yet sees polytetrafluoroethylmaterial material at present.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR is provided.
Another object of the present invention is to the preparation method that this polytetrafluoroethylene (PTFE) ultra micro water filtration film is provided.
For achieving the above object, this invention takes following technical scheme:
For a preparation method for the polytetrafluoroethylene (PTFE) ultra micro water filtration film of flat MBR, comprise following technical step:
(1) batch mixing;
(2) base;
(3) extrude;
(4) roll;
(5) longitudinal stretching after ungrease treatment;
(6) longitudinal stretching after surface treatment;
(7) sintering curing after cross directional stretch;
(8) combination process and hydrophilic treated.
In technique scheme, the batch mixing of step (1) is: in teflon resin powder, add hydro carbons extrusion aid, and both fully mix by weight the ratio for 1:0.25 ~ 0.28, at 50 DEG C, leave standstill 24 hours, forms material.
In technique scheme, the base of step (2) is: cylindrical base material being pressed at 50 DEG C Φ 120mm in advance.
In technique scheme, step (3) extrude for: cylindrical base is placed on pushing machine, under 55 ~ 60 DEG C of conditions, is forced into the round bar of Φ 20 ~ 22mm.
In technique scheme, the calendering of step (4) is: be placed on calender by circle bar, is rolled into oil-containing base band under 70 DEG C of conditions, and thickness is 120 ~ 150 microns.
In technique scheme, after the ungrease treatment of step (5), longitudinal stretching is: by the degreasing at 260 ~ 280 DEG C of oil-containing base band, and remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is become degreasing base band after 3 ~ 4 times.
In technique scheme, after the surface treatment of step (6), longitudinal stretching is: at 280 ~ 290 DEG C, carry out second time longitudinal stretching, obtains longitudinal stretching Ranvier's membrane.
In technique scheme, after the cross directional stretch of step (7), sintering curing is: by longitudinal stretching Ranvier's membrane on film balance, cross directional stretch at 120 DEG C, then 350 DEG C of sintering curings 50 seconds, it is 10-30 micron that film thickness is prepared in acquisition, aperture 0.3 micron-0.5 micron polytetrafluoroethylene (PTFE) basis film.
In technique scheme, combination process and the hydrophilic treated of step (8) are: Ranvier's membrane is carried out on the dull and stereotyped non-woven fabrics of PET the compound without any medium, the final compound dry film obtaining 100-500 micron; Again polytetrafluoroethylene (PTFE) compound dry film is placed in fluorochemical urethane and floods after 5 to 10 seconds, after drying at 100 to 240 DEG C, obtain a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR.
In technique scheme, preparation method's preparation-obtained polytetrafluoroethylene (PTFE) ultra micro water filtration film of described a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR.
Compared with prior art, the present invention has following beneficial effect:
(1) the preparation-obtained polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR has the performances such as good mechanical strength, chemical stability, heat resistance, weatherability, uvioresistant and antimicrobial erosion.
(2) the average aperture of polytetrafluoroethylene (PTFE) ultra micro water filtration film is 0.3-0.5 micron, and porosity is 85%, is greater than 5 cubic metres/square ms/h.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the present invention's scope required for protection is not limited to the scope described by embodiment.
Embodiment 1
For a preparation method for the polytetrafluoroethylene (PTFE) ultra micro water filtration film of flat MBR, it comprises the following steps:
(1) batch mixing; Daikin chemical company produce F106 teflon resin powder in add Exxon Mobil Corporation produce ISOPARK as hydro carbons extrusion aid, both fully mix by weight the ratio for 1:0.25, at 50 DEG C, leave standstill 24 hours, form material;
(2) base; Material is pressed at 50 DEG C the cylindrical base of Φ 120mm in advance;
(3) extrude; Cylindrical base is placed on pushing machine, under 55 DEG C of conditions, is forced into the round bar of Φ 22mm;
(4) roll; Be placed on calender by circle bar, be rolled into oil-containing base band under 70 DEG C of conditions, thickness is 150 microns;
(5) longitudinal stretching after ungrease treatment; By the degreasing at 260 DEG C of oil-containing base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is become degreasing base band after 4 times;
(6) longitudinal stretching after surface treatment; At 280 DEG C, carry out second time longitudinal stretching, obtain longitudinal stretching Ranvier's membrane;
(7) sintering curing after cross directional stretch; By longitudinal stretching Ranvier's membrane, on film balance, cross directional stretch at 120 DEG C, then 350 DEG C of sintering curings 50 seconds, obtains that to prepare film thickness be 10-30 micron, and aperture is at the polytetrafluoroethylene (PTFE) basis film of 0.3 micron-0.5 micron;
(8) combination process; Again Ranvier's membrane is carried out on the dull and stereotyped non-woven fabrics of PET the compound without any medium, the final compound dry film obtaining 100--500 micron; Again polytetrafluoroethylene (PTFE) compound dry film is placed in fluorochemical urethane and floods after 5 seconds, after drying at 100 DEG C, obtain a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR.
Embodiment 2
For a preparation method for the polytetrafluoroethylene (PTFE) ultra micro water filtration film of flat MBR, it comprises the following steps:
(1) batch mixing; Add the ISOPARK of Exxon Mobil Corporation as hydro carbons extrusion aid in the teflon resin powder of the FD3309 produced in du pont company, both fully mix by weight the ratio for 1:0.28, at 50 DEG C, leave standstill 24 hours, form material;
(2) base; Material is pressed at 50 DEG C the cylindrical base of Φ 120mm in advance;
(3) extrude; Cylindrical base is placed on pushing machine, under 60 DEG C of conditions, is forced into the round bar of Φ 20mm;
(4) roll; Be placed on calender by circle bar, be rolled into oil-containing base band under 70 DEG C of conditions, thickness is 120 microns;
(5) longitudinal stretching after ungrease treatment; By the degreasing at 280 DEG C of oil-containing base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is become degreasing base band after 3 times;
(6) longitudinal stretching after surface treatment; At 290 DEG C, carry out second time longitudinal stretching, obtain longitudinal stretching Ranvier's membrane;
(7) sintering curing after cross directional stretch; By longitudinal stretching Ranvier's membrane, on film balance, cross directional stretch at 120 DEG C, then 350 DEG C of sintering curings 50 seconds, obtains that to prepare film thickness be 10-30 micron, and aperture is at the polytetrafluoroethylene (PTFE) basis film of 0.3 micron-0.5 micron;
(8) combination process; Again Ranvier's membrane is carried out on the dull and stereotyped non-woven fabrics of PET the compound without any medium, the final compound dry film obtaining 100-500 micron; Again polytetrafluoroethylene (PTFE) compound dry film is placed in fluorochemical urethane and floods after 10 seconds, after drying at 240 DEG C, obtain a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR.
The polytetrafluoroethylene (PTFE) ultra micro water filtration film adopting above-mentioned technique to prepare, the average aperture of its film is 0.3-0.5 micron, and porosity is 85%, is greater than 5 cubic metres/square ms/h.
Claims (2)
1., for a preparation method for the polytetrafluoroethylene (PTFE) ultra micro water filtration film of flat MBR, it is characterized in that, comprise following technical step:
(1) batch mixing: add hydro carbons extrusion aid in teflon resin powder, both fully mix by weight the ratio for 1:0.25 ~ 0.28, at 50 DEG C, leave standstill 24 hours, form material;
(2) base: cylindrical base material being pressed at 50 DEG C Φ 120mm in advance;
(3) extrude: cylindrical base is placed on pushing machine, under 55 ~ 60 DEG C of conditions, be forced into the round bar of Φ 20 ~ 22mm;
(4) roll: be placed on calender by circle bar, be rolled into oil-containing base band under 70 DEG C of conditions, thickness is 120 ~ 150 microns;
(5) longitudinal stretching after ungrease treatment: by the degreasing at 260 ~ 280 DEG C of oil-containing base band, remove extrusion aid, and carry out first time longitudinal stretching, draw ratio is become degreasing base band after 3 ~ 4 times;
(6) longitudinal stretching after surface treatment: carry out second time longitudinal stretching at 280 ~ 290 DEG C, obtains longitudinal stretching Ranvier's membrane;
(7) sintering curing after cross directional stretch: by longitudinal stretching Ranvier's membrane on film balance, cross directional stretch at 120 DEG C, then 350 DEG C of sintering curings 50 seconds, obtain that to prepare film thickness be 10-30 micron, aperture is at the polytetrafluoroethylene (PTFE) basis film of 0.3 micron-0.5 micron;
(8) combination process and hydrophilic treated: Ranvier's membrane is carried out on the dull and stereotyped non-woven fabrics of PET the compound without any medium, the final compound dry film obtaining 100-500 micron; Again polytetrafluoroethylene (PTFE) compound dry film is placed in fluorochemical urethane and floods after 5 to 10 seconds, after drying at 100 to 240 DEG C, obtain a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR.
2. preparation method's preparation-obtained polytetrafluoroethylene (PTFE) ultra micro water filtration film of a kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR according to claim 1.
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| CN103858736A (en) * | 2014-03-25 | 2014-06-18 | 湖州森诺氟材料科技有限公司 | Water saving device for drip irrigation of root system of crop |
| CN103862729A (en) * | 2014-03-25 | 2014-06-18 | 湖州森诺氟材料科技有限公司 | Multifunctional ultra-light and ultra-thin shell fabric |
| CN103862774A (en) * | 2014-03-25 | 2014-06-18 | 湖州森诺氟材料科技有限公司 | Double-component windproof ventilating film |
| CN103861482A (en) * | 2014-03-25 | 2014-06-18 | 湖州森诺氟材料科技有限公司 | Polytetrafluoroethylene air-cleaning filtering membrane |
| CN103920400A (en) * | 2014-04-02 | 2014-07-16 | 湖州森诺氟材料科技有限公司 | Expanded polytetrafluoroethylene filter membrane for drop irrigation of crop roots and preparation method thereof |
| CN105923896A (en) * | 2016-05-11 | 2016-09-07 | 安徽洋森环保节能科技有限公司 | Method for treating domestic wastewater with porous multilayer hollow PTFE-MBR membrane |
| CN110508161A (en) * | 2018-05-22 | 2019-11-29 | 江苏斯凯氟复合材料有限公司 | A kind of preparation method of hydrophilic polyfluortetraethylemicroporous microporous membrane |
| CN112588135A (en) * | 2020-11-25 | 2021-04-02 | 中国海诚工程科技股份有限公司 | MBR flat membrane and preparation method thereof |
| CN113003866A (en) * | 2021-03-03 | 2021-06-22 | 江西绿建环保科技有限公司 | AO + facultative MBR membrane integral type sewage treatment device |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 313025 Longquanwu block, Miaoxi Town, Huzhou City, Zhejiang Province Patentee after: Huzhou Jinglan Environmental Protection Technology Co.,Ltd. Address before: 313025 Longquan Bay block, Miao Xi Town, Wuxing District, Huzhou, Zhejiang Patentee before: Zhejiang jinson Regenerative Resources Development Co.,Ltd. |