CN104826501A - High peel strength vinyl polyvinylidene fluoride hollow fiber composite membrane preparation process - Google Patents
High peel strength vinyl polyvinylidene fluoride hollow fiber composite membrane preparation process Download PDFInfo
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- CN104826501A CN104826501A CN201510175787.XA CN201510175787A CN104826501A CN 104826501 A CN104826501 A CN 104826501A CN 201510175787 A CN201510175787 A CN 201510175787A CN 104826501 A CN104826501 A CN 104826501A
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Abstract
The present invention discloses a high peel strength vinyl polyvinylidene fluoride hollow fiber composite membrane preparation process, which specifically comprises that: fiber yarns are dipped in a low molecular vinyl polyvinylidene fluoride solution, drying is performed, and a hollow fiber tube is woven through a high speed knitting machine; a membrane casting solution and the hollow fiber tube coated with the low molecular vinyl polyvinylidene fluoride are subjected to co-extrusion on from a spinneret; and the obtained material passes through an air section and then is immersed in a water bath tank, and the membrane casting solution is subjected to rapid phase separation membrane forming under thermally induced phase separation and non-solvent induced phase separation. According to the present invention, the low molecular vinyl polyvinylidene fluoride solution is used to coat the fiber yarns, such that the strong binding force between the hollow fiber tube formed by weaving the fiber yarns and the membrane casting solution containing vinyl polyvinylidene fluoride is provided, the peel strength of the coated membrane layer and the hollow fiber tube is more than 0.5 MPa, the preparation process is applied in the immersion type water treatment technology, and the disadvantage of easy peeling of the vinyl polyvinylidene fluoride fiber composite membrane is overcome.
Description
Technical field
The invention belongs to polyvinylidene fluoride hollow fiber composite film material preparation field, particularly relate to a kind of preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane.
Background technology
Immersion hyperfiltration technique is the film biologic treating technique be applied in water treatment, by system membrane separation technique and biological wastewater treatment technology combined, is a kind of emerging sewage disposal technology.Polyvinylidene fluoride hollow fiber composite membrane, because having good chemical stability and heat endurance, has been widely used in multiple field such as industry and municipal sewage treatment, drink water purifying, Treated sewage reusing.Membrane filtration processes is divided into filtration, and backwash and chemistry strengthen backwash three steps.Polyvinylidene fluoride separation membrane is used for immersion hyperfiltration technique, the following condition of demand fulfillment: (1) film good hydrophilic property, flux is high, stain resistance is high; (2) mechanical strength is high; (3) peel strength is high.
Prior art CN101264428B discloses the method for modifying polyvinylidene fluoride ultrafiltration membrane by amphiphilic co-polymer, by amphipathic copolymer and polyvinylidene blending, the film prepared by solution phase inversion has the finer and close hydrogel top layer that tens of uniqueness arrives hundreds of nanometer, therefore have the feature of hydrophily, antipollution, large flux, high rejection, the prior art provides the method for modifying making Kynoar have hydrophily, antipollution, large flux and high rejection characteristic.Zenon company of Canada (US Patent No. 5,472,607, US2003/009827 5A1, WO 00/78437 A1) discloses a kind of polymer composite hollow fibre microporous membrane technology prepared truly.The polymer composite hollow fibre microporous barrier prepared by this technology only has very thin one layer of polymeric diffusion barrier, and its thickness is 0.01 ~ 0.1mm, and the water flux of therefore obtained film increases greatly, and transmembrane pressure reduces greatly.But, polymer separation film is just compounded in the outer surface of fiber braided tube by this hollow-fibre membrane, therefore the binding ability between polymer separation film and fiber braided tube is bad, carrying out in reverse cleaning process to film, easily peel off between polymer separation film and fiber braided tube, peel strength is not high.The composite membrane of woven tube base material is adopted to there is the fatal defects of coat and woven tube stripping, peel strength is generally all less than 0.2MPa, therefore the invention provides a kind of preparation technology with the immersion polyvinylidene fluoride hollow fiber composite membrane of high-peeling strength, to overcome the deficiencies in the prior art.
Summary of the invention
Main purpose of the present invention is the problem of the peel strength deficiency in order to solve polyvinylidene fluoride hollow fiber composite membrane in prior art, provides a kind of preparation technology with the immersion polyvinylidene fluoride hollow fiber composite membrane of high-peeling strength.
To achieve these goals, the technical solution used in the present invention is as follows:
The preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane, step is as follows:
(1) silvalin is passed through the dip-coating of low molecular weight polycaprolactone vinylidene solution, after drying, be woven into hollow fiber conduit by high-speed knitter; Adopt low molecular weight polycaprolactone vinylidene solution coated fiber yarn, between the hollow fiber conduit of this silvalin braiding and casting solution, there is very strong adhesion, coating rete and hollow fiber conduit peel strength >0.5MPa.
(2) Kynoar, solvent, hydrophilic additive, pore-foaming agent are uniformly dissolved to prepare casting solution by weight 15 ~ 20:55 ~ 74:1 ~ 5:10 ~ 20 blending and stirring; Take to have with Kynoar the hydrophilic additive of better blended, sympathy in casting solution, with Kynoar, there is good associativity in film forming procedure, the film of preparation has the feature of strong durable hydrophilic property, antipollution, large flux, high rejection, the pure water contact angle <35 ° of its film.
(3) at 90 ~ 120 DEG C, extruded from spinning head is same by the hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene, support with hollow fiber conduit, obtained composite membrane mechanical strength is large, intensity >200N;
(4) after 5 ~ 50cm air section, water bath is immersed, casting solution is fast filming under heating consumers and phase separation, wherein the temperature of water bath is 60 ~ 70 DEG C, accounts for leading phase-splitting at air section heating consumers, and phase separation accounts for leading phase-splitting in a water bath.
(5) the hollow-fibre membrane intermediate that step (4) obtained to immerse in 30 ~ 55 DEG C of ultra-pure waters 10 ~ 15 hours;
(6) hollow-fibre membrane intermediate step (5) obtained is dry under 50 DEG C of room temperatures, obtains Pvdf Microporous Hollow Fiber Membrane.
Preferably, described silvalin is the one in PETG, nylon, polyethylene and polypropylene.
Preferably, described low molecular weight polycaprolactone vinylidene solution is made up by weight the dissolving of 5 ~ 10:90 ~ 95 ratio of Kynoar and dimethylacetylamide, and Kynoar molecular weight is 10 ~ 40W.
Preferably, the solvent described in step (2) is one or more mixing in glyceryl triacetate, trimethyl phosphate, triethyl phosphate, tributyl phosphate, dimethylacetylamide, dimethyl formamide and 1-METHYLPYRROLIDONE.
Preferably, the hydrophilic additive described in step (2) is polyvinylpyrrolidone or polyox-yethylene-polyoxypropylene block copolymer.
Preferably, the pore-foaming agent described in step (2) is one or more in polyvinylpyrrolidone, polyvinyl alcohol and polyethylene glycol.
Beneficial effect of the present invention: the present invention adopts low molecular weight polycaprolactone vinylidene solution coated fiber yarn, between the hollow fiber conduit of this silvalin braiding and the casting solution containing Kynoar, there is very strong adhesion, coating rete and hollow fiber conduit peel strength >0.5MPa, be applied in immersion water technology, overcome the shortcoming that polyvinylidene fluoride composite membrane is easily peeled off; Take to have with Kynoar the hydrophilic additive of better blended, sympathy in casting solution, have fine prehensile with Kynoar in film forming procedure, the film of preparation has strong durable hydrophilic property, the pure water contact angle <35 degree of its film; Support with hollow fiber conduit, obtained composite membrane mechanical strength is large, intensity >300N.Quick phase-splitting film forming under heating consumers and phase separation, this film is the asymmetric microstructure of high crystalline, improves preferably filtering accuracy.
Accompanying drawing explanation
Fig. 1 is preparation technology's flow chart of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane of the present invention.
Fig. 2 is high-peeling strength polyvinylidene fluoride hollow fiber composite membrane outer surface electron microscopic picture.
Wherein: 1 silvalin, 2 silvalins put silk cylinder, 3 dip tanks, 4 filament spindles, 5 high-speed knitters, 6 hollow fiber conduits, 7 hollow fiber conduit ureeling barrels, 8 spinning heads, 9 water baths, 10 hollow fiber composite membrane rolling cylinders, 11 hollow fiber composite membranes, 12 measuring pumps, 13 coating flow containers, 14 silvalin wire drawing tubes.
Detailed description of the invention
The invention will be further described for composition graphs 1, silvalin 1 is put silk cylinder 2 through silvalin and is entered the dip tank 3 that Kynoar solution is housed, dip-coating is carried out to silvalin 1, after silvalin 1 drying after dip-coating, arrange through silvalin wire drawing tube 14 and receive silk, hollow fiber conduit 6 is woven into by filament spindle 4 and high-speed knitter 5, described hollow fiber conduit 6 arranges through hollow fiber conduit ureeling barrel 7, and caused spinning pump, casting solution is pumped into spinning pump by measuring pump 12 by the coating flow container 13 that casting solution is housed, extrude from spinning head 8 together with hollow fiber conduit 6, water bath 9 is immersed after air section, casting solution is quick phase-splitting film forming under heating consumers and phase separation, obtained hollow fiber composite membrane 11 is through ultra-pure water process, after drying, arranged by hollow fiber composite membrane rolling cylinder 10.
By silvalin by the dip-coating of low molecular weight polycaprolactone vinylidene solution, after drying, be woven into hollow fiber conduit by high-speed knitter; Wherein Kynoar solution is made up by weight the dissolving of 5 ~ 10:90 ~ 95 ratio of Kynoar and dimethyl formamide, and Kynoar molecular weight is 10 ~ 40W, is woven into hollow fiber conduit after drying by high-speed knitter; Kynoar, solvent, hydrophilic additive, pore-foaming agent are uniformly dissolved to prepare casting solution by weight 15 ~ 20:55 ~ 74:1 ~ 5:10 ~ 20 blending and stirring; Extruded from spinning head is same by the hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene, after 5 ~ 50cm air section, immerse 60 ~ 70 DEG C of water baths, casting solution is quick phase-splitting film forming under heating consumers and phase separation; Hollow-fibre membrane intermediate obtained above to be immersed in 30 ~ 55 DEG C of ultra-pure waters 10 ~ 15 hours; Again that hollow-fibre membrane intermediate is dry under 50 DEG C of room temperatures, obtain high-peeling strength Pvdf Microporous Hollow Fiber Membrane.Film has strong durable hydrophilic property, the pure water contact angle <35 degree of its film; Film mechanical strength >300N.Quick phase-splitting film forming under heating consumers and phase separation, this film is the asymmetric microstructure of high crystalline, and membrane filtration aperture is controlled, and as shown in Fig. 2 Electronic Speculum figure, film average pore size is 0.01 ~ 0.2 micron.Under 0.1MPa, pure water flux is greater than 800L/m
2.h
.mPa.
Embodiment 1
Be the Kynoar solution dip-coating of 15W by molecular weight by pet fiber yarn, wherein Kynoar weight ratio is 5%, dimethyl formamide weight ratio is 95%, is woven into hollow fiber conduit after drying by high-speed knitter; By Su Wei 1015 trade mark Kynoar, solvent dimethylformamide, polyvinylpyrrolidone hydrophilic additive, polyethylene glycol, 17:58:5:20 is blended by weight, and at 100 DEG C, stirring and dissolving is evenly to prepare casting solution; The hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene is extruded from spinning head is same, 60 DEG C of water baths are immersed after 20cm air section, casting solution is quick phase-splitting film forming under heating consumers and phase separation, account for leading phase-splitting at air section heating consumers, phase separation accounts for leading phase-splitting in a water bath.Hollow-fibre membrane intermediate obtained above to be immersed in 55 DEG C of ultra-pure waters 12 hours; Again that hollow-fibre membrane intermediate is dry under 50 DEG C of room temperatures, obtain high-peeling strength polyvinylidene fluoride hollow fiber composite membrane.This film has strong durable hydrophilic property, and the pure water contact angle of its film is 33 °; The hot strength >300N(of obtained composite membrane draws constantly), peel strength is 0.57MPa; Under 0.1MPa, pure water flux is 890L/m
2.h
.mPa.
Embodiment 2
Be the dip-coating of 10W Kynoar solution by nylon fiber yarn by molecular weight, wherein Kynoar weight ratio is 7%, dimethyl formamide weight ratio is 93%, is woven into hollow fiber conduit after drying by high-speed knitter; By A Ke horse 301F trade mark Kynoar, solvent dimethylformamide, polyvinylpyrrolidone hydrophilic additive, polyethylene glycol, 18:60:4:18 is blended by weight, and at 110 DEG C, stirring and dissolving is evenly to prepare casting solution; The hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene is extruded from spinning head is same, 60 DEG C of water baths are immersed after 25cm air section, casting solution is quick phase-splitting film forming under heating consumers and phase separation, account for leading phase-splitting at air section heating consumers, phase separation accounts for leading phase-splitting in a water bath.Hollow-fibre membrane intermediate obtained above to be immersed in 45 DEG C of ultra-pure waters 12 hours; Again that hollow-fibre membrane intermediate is dry under 50 DEG C of room temperatures, obtain high-peeling strength Pvdf Microporous Hollow Fiber Membrane.This film has strong durable hydrophilic property, and the pure water contact angle of its film is 30 °; The hot strength >300N(of obtained composite membrane draws constantly), peel strength is 0.65MPa; Under 0.1MPa, pure water flux is 960L/m
2.h
.mPa.
Embodiment 3
Be the dip-coating of 40W Kynoar solution by polyethylene fibre yarn by molecular weight, wherein Kynoar weight ratio is 10%, dimethyl formamide weight ratio is 90%, is woven into hollow fiber conduit after drying by high-speed knitter; By Kynoar, glyceryl triacetate solvent, polyox-yethylene-polyoxypropylene block copolymer hydrophilic additive, polyethylene glycol, 20:55:5:20 is blended by weight, and at 120 DEG C, stirring and dissolving is evenly to prepare casting solution; The hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene is extruded from spinning head is same, 70 DEG C of water baths are immersed after 50cm air section, casting solution is quick phase-splitting film forming under heating consumers and phase separation, account for leading phase-splitting at air section heating consumers, phase separation accounts for leading phase-splitting in a water bath.Hollow-fibre membrane intermediate obtained above to be immersed in 55 DEG C of ultra-pure waters 10 hours; Again that hollow-fibre membrane intermediate is dry under 50 DEG C of room temperatures, obtain high-peeling strength Pvdf Microporous Hollow Fiber Membrane.This film has strong durable hydrophilic property, and the pure water contact angle of its film is 34 °; The hot strength >300N(of obtained composite membrane draws constantly), peel strength is 0.53MPa; Under 0.1MPa, pure water flux is 801L/m
2.h
.mPa.
Embodiment 4
Be the dip-coating of 10W Kynoar solution by polyethylene fibre yarn by molecular weight, wherein Kynoar weight ratio is 5%, dimethyl formamide weight ratio is 95%, is woven into hollow fiber conduit after drying by high-speed knitter; By Kynoar, glyceryl triacetate solvent, polyox-yethylene-polyoxypropylene block copolymer hydrophilic additive, polyethylene glycol, 15:74:1:10 is blended by weight, and at 90 DEG C, stirring and dissolving is evenly to prepare casting solution; The hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene is extruded from spinning head is same, 60 DEG C of water baths are immersed after 5cm air section, casting solution is quick phase-splitting film forming under heating consumers and phase separation, account for leading phase-splitting at air section heating consumers, phase separation accounts for leading phase-splitting in a water bath.Hollow-fibre membrane intermediate obtained above to be immersed in 30 DEG C of ultra-pure waters 15 hours; Again that hollow-fibre membrane intermediate is dry under 50 DEG C of room temperatures, obtain high-peeling strength Pvdf Microporous Hollow Fiber Membrane.This film has strong durable hydrophilic property, and the pure water contact angle of its film is 34 °; The hot strength >300N(of obtained composite membrane draws constantly), peel strength is 0.51MPa; Under 0.1MPa, pure water flux is 810L/m
2.h
.mPa.
Claims (6)
1. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane, step is as follows:
(1) silvalin is passed through the dip-coating of low molecular weight polycaprolactone vinylidene solution, after drying, be woven into hollow fiber conduit by high-speed knitter;
(2) Kynoar, solvent, hydrophilic additive, pore-foaming agent are uniformly dissolved to prepare casting solution by weight 15 ~ 20:55 ~ 74:1 ~ 5:10 ~ 20 blending and stirring;
(3) at 90 ~ 120 DEG C, the hollow fiber conduit of casting solution and coating low molecular weight polycaprolactone vinylidene is extruded from spinning head is same;
(4) after 5 ~ 50cm air section, immerse water bath, casting solution is fast filming under heating consumers and the dual phase-splitting of phase separation, and wherein the temperature of water bath is 60 ~ 70 DEG C;
(5) the hollow-fibre membrane intermediate that step (4) obtained to immerse in 30 ~ 55 DEG C of ultra-pure waters 10 ~ 15 hours;
(6) hollow-fibre membrane intermediate step (5) obtained is dry under 50 DEG C of room temperatures, obtains Pvdf Microporous Hollow Fiber Membrane.
2. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane according to claim 1, is characterized in that: described silvalin is the one in PETG, nylon, polyethylene and polypropylene.
3. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane according to claim 1, it is characterized in that: described low molecular weight polycaprolactone vinylidene solution is made up by weight the dissolving of 5 ~ 10:90 ~ 95 ratio of Kynoar and dimethyl formamide, and Kynoar molecular weight is 10 ~ 40W.
4. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane according to claim 1, is characterized in that: the solvent described in step (2) is one or more mixing in glyceryl triacetate, trimethyl phosphate, triethyl phosphate, tributyl phosphate, dimethylacetylamide, dimethyl formamide and 1-METHYLPYRROLIDONE.
5. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane according to claim 1, is characterized in that: the hydrophilic additive described in step (2) is polyvinylpyrrolidone or polyox-yethylene-polyoxypropylene block copolymer.
6. the preparation technology of high-peeling strength polyvinylidene fluoride hollow fiber composite membrane according to claim 1, is characterized in that: the pore-foaming agent described in step (2) is one or more in polyvinylpyrrolidone, polyvinyl alcohol and polyethylene glycol.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861462A (en) * | 2017-02-04 | 2017-06-20 | 杭州水处理技术研究开发中心有限公司 | A kind of composite braided pipe strengthens the preparation method of PVDF hollow-fibre membranes |
| CN107096395A (en) * | 2017-05-19 | 2017-08-29 | 开源环保（集团）有限公司 | A kind of reinforced type polyvinylidene fluoride hollow fiber miillpore filter and preparation method thereof |
| CN108211815A (en) * | 2017-12-29 | 2018-06-29 | 盐城海普润膜科技有限公司 | A kind of composite enhanced hollow-fibre membrane and its preparation method and application |
| CN110652888A (en) * | 2019-11-13 | 2020-01-07 | 湖北瑞滤膜科技有限公司 | Low-pressure self-flow polyvinylidene fluoride hollow fiber composite membrane with lining and preparation method thereof |
| CN111921384A (en) * | 2020-08-11 | 2020-11-13 | 浙江易膜新材料科技有限公司 | Casting membrane liquid of PVDF hollow fiber ultrafiltration membrane, spinning mechanism and production method thereof |
| CN113398780A (en) * | 2021-01-13 | 2021-09-17 | 杭州高通膜技术有限公司 | Preparation method of polyvinylidene fluoride hollow fiber membrane with ultrahigh tensile strength and anti-peeling strength and extrusion equipment thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553463A (en) * | 2011-12-09 | 2012-07-11 | 西安建筑科技大学 | Method for preparing braided tube/polymer composite hollow fibrous membrane by thermal induced method |
| CN102784566A (en) * | 2012-08-28 | 2012-11-21 | 沁园集团股份有限公司 | Preparation method of heterogeneous enhanced polyvinylidene fluoride hollow fiber membrane with high bursting strength |
-
2015
- 2015-04-15 CN CN201510175787.XA patent/CN104826501A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553463A (en) * | 2011-12-09 | 2012-07-11 | 西安建筑科技大学 | Method for preparing braided tube/polymer composite hollow fibrous membrane by thermal induced method |
| CN102784566A (en) * | 2012-08-28 | 2012-11-21 | 沁园集团股份有限公司 | Preparation method of heterogeneous enhanced polyvinylidene fluoride hollow fiber membrane with high bursting strength |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861462A (en) * | 2017-02-04 | 2017-06-20 | 杭州水处理技术研究开发中心有限公司 | A kind of composite braided pipe strengthens the preparation method of PVDF hollow-fibre membranes |
| CN107096395A (en) * | 2017-05-19 | 2017-08-29 | 开源环保（集团）有限公司 | A kind of reinforced type polyvinylidene fluoride hollow fiber miillpore filter and preparation method thereof |
| CN107096395B (en) * | 2017-05-19 | 2020-08-25 | 开源环保（集团）有限公司 | Enhanced polyvinylidene fluoride hollow fiber microporous filter membrane and preparation method thereof |
| CN108211815A (en) * | 2017-12-29 | 2018-06-29 | 盐城海普润膜科技有限公司 | A kind of composite enhanced hollow-fibre membrane and its preparation method and application |
| CN110652888A (en) * | 2019-11-13 | 2020-01-07 | 湖北瑞滤膜科技有限公司 | Low-pressure self-flow polyvinylidene fluoride hollow fiber composite membrane with lining and preparation method thereof |
| CN110652888B (en) * | 2019-11-13 | 2021-09-17 | 湖北瑞滤膜科技有限公司 | Low-pressure self-flow polyvinylidene fluoride hollow fiber composite membrane with lining and preparation method thereof |
| CN111921384A (en) * | 2020-08-11 | 2020-11-13 | 浙江易膜新材料科技有限公司 | Casting membrane liquid of PVDF hollow fiber ultrafiltration membrane, spinning mechanism and production method thereof |
| CN113398780A (en) * | 2021-01-13 | 2021-09-17 | 杭州高通膜技术有限公司 | Preparation method of polyvinylidene fluoride hollow fiber membrane with ultrahigh tensile strength and anti-peeling strength and extrusion equipment thereof |
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