CN103464008A - Pouring method of polytetrafluoroethylene hollow fiber membrane module - Google Patents
Pouring method of polytetrafluoroethylene hollow fiber membrane module Download PDFInfo
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- CN103464008A CN103464008A CN2013103996471A CN201310399647A CN103464008A CN 103464008 A CN103464008 A CN 103464008A CN 2013103996471 A CN2013103996471 A CN 2013103996471A CN 201310399647 A CN201310399647 A CN 201310399647A CN 103464008 A CN103464008 A CN 103464008A
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- CN
- China
- Prior art keywords
- hollow fiber
- fiber membrane
- pouring
- polytetrafluoroethylhollow
- epoxy resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012528 membrane Substances 0.000 title claims abstract description 77
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 21
- -1 polytetrafluoroethylene Polymers 0.000 title abstract 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 title abstract 4
- 239000004810 polytetrafluoroethylene Substances 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- URXNVXOMQQCBHS-UHFFFAOYSA-N naphthalene;sodium Chemical compound [Na].C1=CC=CC2=CC=CC=C21 URXNVXOMQQCBHS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 238000005273 aeration Methods 0.000 claims abstract description 12
- 239000000741 silica gel Substances 0.000 claims abstract description 10
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims description 24
- 230000001070 adhesive effect Effects 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 22
- 239000004809 Teflon Substances 0.000 claims description 20
- 229920006362 Teflon® Polymers 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 13
- 229920005749 polyurethane resin Polymers 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 abstract description 10
- 229920002635 polyurethane Polymers 0.000 abstract description 6
- 239000004814 polyurethane Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005276 aerator Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 6
- 229920001875 Ebonite Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000002790 naphthalenes Chemical class 0.000 description 3
- 150000007984 tetrahydrofuranes Chemical class 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a pouring method of a polytetrafluoroethylene hollow fiber membrane module. The pouring method comprises the following steps of preparing a sodium naphthalene solution, pretreating the surface of a polytetrafluoroethylene hollow fiber membrane to be poured by using the sodium naphthalene solution, carrying out primary pouring by adopting epoxy resin, and finally carrying out secondary pouring between an aerator position and the epoxy resin cured after the primary pouring by adopting polyurethane or silica gel. According to the pouring method, the epoxy resin is hard glue and has good adhering property, the adhesion strength can be improved and the phenomenon of wire leakage when flexible glue is adopted is avoided; the polyurethane or silica gel is flexible glue and can cause swinging of the root part of the hollow fiber membrane by aeration, and the flexible glue can swing along with the swinging of the root part of the hollow fiber membrane to a certain degree, thus the phenomenon of wire leakage at the root part of the hollow fiber membrane in the aeration process is effectively avoided. According to the pouring method, the polytetrafluoroethylene hollow fiber membrane can be poured into the membrane module in a solid container, and the membrane module has favorable sealing property at the adhesion part and can resist water, high temperature and chemical corrosion.
Description
Technical field
The present invention relates to the pouring procedure of hollow fiber film assembly, be specifically related to a kind of pouring procedure of polytetrafluoroethylhollow hollow fiber membrane assembly.
Background technology
Polytetrafluoroethylhollow hollow fiber membrane can be widely used in the film separation processes such as ultra filtration, membrane bioreactor and film distillation, in separating with the field such as refining of municipal wastewater and advanced treatment of industrial waste water and reuse, drink water purifying, counter-infiltration pre-treatment, food and chemical products, has potential using value widely.Polytetrafluoroethylhollow hollow fiber membrane, have that film silk intensity is high, loading density is large, porosity is large, acid and alkali-resistance and advantages such as organic solvent, resistance to oxidation, in ultra filtration separates, has obvious advantage.
Polytetrafluoroethylhollow hollow fiber membrane is made membrane module in needing, with adhesive, it is enclosed in to container before filtering use.Patent 201210112827.2 is permeated processing by interface modifier to polytetrafluoroethylhollow hollow fiber membrane, after casting epoxy resin again.But, because epoxy resin hardness is high, in long-time aeration process, film silk high vibration in air-flow, cause the cementing place of film silk root and adhesive to form breakaway poing, causes fracture of wire.Fracture of wire can form very large threat to film silk on every side, because in vibration processes, near film silk fracture of wire can enwind, cause mud and solid matter to be attached to quickly the cementing place of film silk root, when mud reaches the amount that the film silk can bear, can cause more fracture of wire, finally make the full wafer film scrap.Patent 201110425403.7 and 201210101336.8 all adopts the single adhesive of epoxy resin, polyurethane or silica gel to be poured into a mould.There is following problem in the pouring procedure of single adhesive: epoxy resin (ebonite) adhesion strength is large, but hardness is high, and film silk root and adhesive be cementing is in aeration process easily fracture of wire.Polyurethane and silica adhesive (flexible glue) good springiness, softness, but adhesion strength is low, and the film silk is easily deviate from and is leaked silk from adhesive.
Summary of the invention
The object of the present invention is to provide a kind of pouring procedure of polytetrafluoroethylhollow hollow fiber membrane assembly, the method is, by sodium naphthalene solution, polytetrafluoroethylhollow hollow fiber membrane is carried out to surface preparation, adopt again epoxy resin to carry out once-cast, then with polyurethane or silica gel, carry out second pouring.By the method, polytetrafluoroethylhollow hollow fiber membrane can be cast in solids container and make membrane module, its abutting edge good seal, can water-fast, high temperature resistant and resistance to chemical attack.
The technical solution used in the present invention is:
The step of the method is as follows:
(1) preparation of sodium naphthalene solution
By naphthalene, sodium and oxolane, 1:0.28 ~ 0.52:2.72 ~ 3.52 are mixed by mass percentage, stir it is dissolved, the sodium naphthalene solution that preparation contains the naphthalene sodium complex;
(2) preparation of modified Teflon hollow-fibre membrane
The polytetrafluoroethylhollow hollow fiber membrane that will pour into a mould is immersed in described sodium naphthalene solution 10 seconds～5 minutes, take out, with analyzing pure or chemical pure acetone cleaning polytetrafluoroethylhollow hollow fiber membrane pouring section, remove the polytetrafluoroethylhollow hollow fiber membrane surface attachments, dry at normal temperatures, be prepared into the modified Teflon hollow-fibre membrane;
(3) cast of polytetrafluoroethylhollow hollow fiber membrane assembly
First adopt silica adhesive to seal processing to modified Teflon hollow-fibre membrane two ends; The part that adopts again epobond epoxyn that described modified Teflon hollow-fibre membrane will be poured into a mould is cast in solids container, pour into a mould for the first time, the pouring length of epobond epoxyn is 1 centimetre～10 centimetres, solidification temperature is 20 ℃～80 ℃, and be 2 hours～48 hours hardening time; Then the epoxy resin surface after solidifying injects polyurethane resin adhesive or silica adhesive, pour into a mould for the second time, the pouring length of polyurethane resin or silica gel is 1 centimetre～10 centimetres, solidification temperature is 20 ℃～80 ℃, be 2 hours～48 hours hardening time, makes the polytetrafluoroethylhollow hollow fiber membrane assembly.
The position of described cast for the second time is in filtration system between the epoxy resin after the solidifying of aeration head position and cast for the first time.
Described epobond epoxyn adopts commercially available prod, as 6101, E44.
Described silica adhesive adopts commercially available prod, as 703,704 or 705 silica gel.
Described polyurethane resin adhesive adopts commercially available prod ，Ru Britain DSM NeoRez
u335, U391 or U321.
With background technology, compare, the beneficial effect that the present invention has is:
Adopt ebonite and two sections castings of flexible glue, and flexible glue is near a side of membrane module aeration.Epoxy resin is ebonite, and caking property is good, can improve adhesion strength, avoids only adopting the flexible glue problem, the problem includes: leakage silk problem; Polyurethane or silica gel are flexible glue, and aeration can cause the swing of hollow-fibre membrane root, and flexible glue can swing with this swing to a certain extent, thus the fracture of wire phenomenon of effectively having avoided the hollow-fibre membrane root to occur in aeration process.The present invention can be cast in polytetrafluoroethylhollow hollow fiber membrane in solids container and make membrane module, and its abutting edge good seal can water-fast, high temperature resistant and resistance to chemical attack.
The specific embodiment
embodiment 1:
(1) preparation of sodium naphthalene solution
20 gram naphthalenes, 5.6 gram sodium and 54.4 gram oxolanes are mixed, stir and make its dissolving, prepare sodium naphthalene solution;
(2) preparation of modified Teflon hollow-fibre membrane
The polytetrafluoroethylhollow hollow fiber membrane that will pour into a mould is immersed in described sodium naphthalene solution, after 5 minutes, take out, clean the polytetrafluoroethylhollow hollow fiber membrane pouring section with analyzing pure acetone, remove the polytetrafluoroethylhollow hollow fiber membrane surface attachments, dry at normal temperatures, be prepared into the modified Teflon hollow-fibre membrane;
(3) cast of polytetrafluoroethylhollow hollow fiber membrane assembly
First adopt 703 silica adhesives to seal processing to modified Teflon hollow-fibre membrane two ends; Adopt 6101 epobond epoxyns that described modified Teflon hollow-fibre membrane is cast in solids container again, pour into a mould for the first time, the pouring length of epobond epoxyn is 1 centimetre, and solidification temperature is 20 ℃, and be 48 hours hardening time; Then inject Britain DSM NeoRez on the epoxy resin after solidifying
u335 polyurethane resin adhesive, pour into a mould for the second time, and the pouring length of polyurethane resin or silica gel is 10 centimetres, solidification temperature is 80 ℃, be 2 hours hardening time, and the polyurethane resin adhesive of cast, near a side of membrane module aeration, is made the polytetrafluoroethylhollow hollow fiber membrane assembly.The polytetrafluoroethylhollow hollow fiber membrane assembly is the pressure below ability 0.4 MPa in the leak detection test, the distilled water that leak detection liquid is 60 ℃.
embodiment 2:
The preparation of a, sodium naphthalene solution
20 gram naphthalenes, 10.4 gram sodium and 70.4 gram oxolanes are mixed, stir and make its dissolving, prepare sodium naphthalene solution;
The preparation of b, modified Teflon hollow-fibre membrane
Polytetrafluoroethylhollow hollow fiber membrane is immersed in described sodium naphthalene solution, takes out after 10 seconds, clean with chemical pure acetone, remove the polytetrafluoroethylhollow hollow fiber membrane surface attachments, dry at normal temperatures, be prepared into the modified Teflon hollow-fibre membrane;
The cast of c, polytetrafluoroethylhollow hollow fiber membrane assembly
First adopt 704 silica adhesives to seal processing to modified Teflon hollow-fibre membrane two ends; Adopt the E44 epobond epoxyn that described modified Teflon hollow-fibre membrane is cast in solids container again, pour into a mould for the first time, the pouring length of epobond epoxyn is 10 centimetres, and solidification temperature is 80 ℃, and be 2 hours hardening time; Then inject Britain DSM NeoRez on the epoxy resin after solidifying
u391 polyurethane resin adhesive, pour into a mould for the second time, and the polyurethane resin pouring length is 1 centimetre, solidification temperature is 20 ℃, be 48 hours hardening time, and the polyurethane resin adhesive of cast, near a side of membrane module aeration, is made the polytetrafluoroethylhollow hollow fiber membrane assembly.The polytetrafluoroethylhollow hollow fiber membrane assembly is the pressure below ability 0.3 MPa in the leak detection test, the distilled water that leak detection liquid is 60 ℃.
embodiment 3:
The preparation of a, sodium naphthalene solution
20 gram naphthalenes, 8.4 gram sodium and 65 gram oxolanes are mixed, stir and make its dissolving, prepare sodium naphthalene solution;
The preparation of b, modified Teflon hollow-fibre membrane
Polytetrafluoroethylhollow hollow fiber membrane is immersed in described sodium naphthalene solution, takes out after 1 minute, clean with analyzing pure acetone, remove the polytetrafluoroethylhollow hollow fiber membrane surface attachments, dry at normal temperatures, be prepared into the modified Teflon hollow-fibre membrane;
The cast of c, polytetrafluoroethylhollow hollow fiber membrane assembly
First adopt 705 silica adhesives to seal processing to modified Teflon hollow-fibre membrane two end sections; Adopt the E44 epobond epoxyn that described modified Teflon hollow-fibre membrane is cast in solids container again, pour into a mould for the first time, the pouring length of epobond epoxyn is 5 centimetres, and solidification temperature is 60 ℃, and be 30 hours hardening time; Then inject 703 silica adhesives on the epoxy resin after solidifying, pour into a mould for the second time, the pouring length of silica gel is 6 centimetres, solidification temperature is 60 ℃, be 30 hours hardening time, and the silica adhesive of cast, near a side of membrane module aeration, is made the polytetrafluoroethylhollow hollow fiber membrane assembly.The polytetrafluoroethylhollow hollow fiber membrane assembly is the pressure below ability 0.35 MPa in the leak detection test, the distilled water that leak detection liquid is 60 ℃.
Claims (2)
1. the pouring procedure of a polytetrafluoroethylhollow hollow fiber membrane assembly, is characterized in that, the step of the method is as follows:
(1) preparation of sodium naphthalene solution
By naphthalene, sodium and oxolane, 1:0.28 ~ 0.52:2.72 ~ 3.52 are mixed by mass percentage, stir it is dissolved, the sodium naphthalene solution that preparation contains the naphthalene sodium complex;
(2) preparation of modified Teflon hollow-fibre membrane
The polytetrafluoroethylhollow hollow fiber membrane that will pour into a mould is immersed in described sodium naphthalene solution 10 seconds～5 minutes, take out, with analyzing pure or chemical pure acetone cleaning polytetrafluoroethylhollow hollow fiber membrane pouring section, remove the polytetrafluoroethylhollow hollow fiber membrane surface attachments, dry at normal temperatures, be prepared into the modified Teflon hollow-fibre membrane;
(3) cast of polytetrafluoroethylhollow hollow fiber membrane assembly
First adopt silica adhesive to seal processing to modified Teflon hollow-fibre membrane two ends; The part that adopts again epobond epoxyn that described modified Teflon hollow-fibre membrane will be poured into a mould is cast in solids container, pour into a mould for the first time, the pouring length of epobond epoxyn is 1 centimetre～10 centimetres, solidification temperature is 20 ℃～80 ℃, and be 2 hours～48 hours hardening time; Then the epoxy resin surface after solidifying injects polyurethane resin adhesive or silica adhesive, pour into a mould for the second time, the pouring length of polyurethane resin or silica gel is 1 centimetre～10 centimetres, solidification temperature is 20 ℃～80 ℃, be 2 hours～48 hours hardening time, makes the polytetrafluoroethylhollow hollow fiber membrane assembly.
2. the pouring procedure of a kind of polytetrafluoroethylhollow hollow fiber membrane assembly according to claim 1 is characterized in that: the position of described cast for the second time is in filtration system between the epoxy resin after the solidifying of aeration head position and cast for the first time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103996471A CN103464008A (en) | 2013-09-05 | 2013-09-05 | Pouring method of polytetrafluoroethylene hollow fiber membrane module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103996471A CN103464008A (en) | 2013-09-05 | 2013-09-05 | Pouring method of polytetrafluoroethylene hollow fiber membrane module |
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| CN103464008A true CN103464008A (en) | 2013-12-25 |
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| CN2013103996471A Pending CN103464008A (en) | 2013-09-05 | 2013-09-05 | Pouring method of polytetrafluoroethylene hollow fiber membrane module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833733A (en) * | 2016-04-28 | 2016-08-10 | 山东金汇膜科技股份有限公司 | Prepackaging method for polytetrafluoroethylene hollow fibrous microporous membrane |
| CN108641583A (en) * | 2018-05-18 | 2018-10-12 | 浙江鹏远新材料股份有限公司 | A kind of farm's sterilization heat insulating reflecting material and preparation method thereof |
| CN109647209A (en) * | 2018-12-04 | 2019-04-19 | 天津膜天膜科技股份有限公司 | A kind of hollow fiber film assembly is continuously poured production forming method |
| CN110038442A (en) * | 2019-04-03 | 2019-07-23 | 三达膜科技（厦门）有限公司 | A kind of termination process method before inner support hollow-fibre membrane film wire casting |
| CN113769590A (en) * | 2021-11-15 | 2021-12-10 | 上海威德环保有限公司 | Integrally formed MBR (membrane bioreactor) membrane unit and forming method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234819A (en) * | 2008-03-07 | 2008-08-06 | 北京汉青天朗水处理科技有限公司 | Hollow fiber membrane modular |
| CN102641664A (en) * | 2012-04-17 | 2012-08-22 | 浙江理工大学 | Pouring method for polytetrafluoroethylene hollow fiber membrane assembly |
-
2013
- 2013-09-05 CN CN2013103996471A patent/CN103464008A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234819A (en) * | 2008-03-07 | 2008-08-06 | 北京汉青天朗水处理科技有限公司 | Hollow fiber membrane modular |
| CN102641664A (en) * | 2012-04-17 | 2012-08-22 | 浙江理工大学 | Pouring method for polytetrafluoroethylene hollow fiber membrane assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833733A (en) * | 2016-04-28 | 2016-08-10 | 山东金汇膜科技股份有限公司 | Prepackaging method for polytetrafluoroethylene hollow fibrous microporous membrane |
| CN108641583A (en) * | 2018-05-18 | 2018-10-12 | 浙江鹏远新材料股份有限公司 | A kind of farm's sterilization heat insulating reflecting material and preparation method thereof |
| CN109647209A (en) * | 2018-12-04 | 2019-04-19 | 天津膜天膜科技股份有限公司 | A kind of hollow fiber film assembly is continuously poured production forming method |
| CN110038442A (en) * | 2019-04-03 | 2019-07-23 | 三达膜科技（厦门）有限公司 | A kind of termination process method before inner support hollow-fibre membrane film wire casting |
| CN113769590A (en) * | 2021-11-15 | 2021-12-10 | 上海威德环保有限公司 | Integrally formed MBR (membrane bioreactor) membrane unit and forming method thereof |
| CN113769590B (en) * | 2021-11-15 | 2022-04-08 | 上海威德环保有限公司 | Integrally formed MBR (membrane bioreactor) membrane unit and forming method thereof |
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Application publication date: 20131225 |