CN1328422C - Blow head for composite spinning and uses thereof - Google Patents
Blow head for composite spinning and uses thereof Download PDFInfo
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- CN1328422C CN1328422C CNB2004100940009A CN200410094000A CN1328422C CN 1328422 C CN1328422 C CN 1328422C CN B2004100940009 A CNB2004100940009 A CN B2004100940009A CN 200410094000 A CN200410094000 A CN 200410094000A CN 1328422 C CN1328422 C CN 1328422C
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Abstract
The present invention relates to a spray head for composite spinning and an application thereof. The spray head comprises a main body of the spray head, a spray head pedestal and a spray head lid, wherein an inner layer casting film liquid cavity is arranged between the spray head pedestal and the spray head lid; an outer layer casting film liquid cavity is arranged between the main body of the spray head and the spray head pedestal; an inner layer casting film liquid inlet communicated with the inner layer casting film liquid cavity is arranged on the spray head lid, an outer layer casting film liquid inlet communicated with the outer layer casting film liquid cavity is arranged on the main body of the spray head; an inner layer casting film liquid outlet communicated with the inner layer casting film liquid cavity and an outer layer casting film liquid outlet communicated with the outer layer casting film liquid cavity are respectively arranged on the bottom face of the spray head pedestal. The spray head is characterized in that the inner layer casting film liquid outlet and the outer layer casting film liquid outlet are homocentric internal and external three C-shaped annular space type outlets. The spray head of the present invention can be used in a composite spinning process in a preparation process for a basal membrane of a hollow fiber composite membrane, and the prepared basal membrane of the hollow fiber composite membrane has a high flux and high mechanical strength.
Description
(1) technical field
The present invention relates to membrane separation technique, be specially the used shower nozzle of a kind of composite spinning and use this shower nozzle to prepare the technology of hollow-fibre membrane composite membrane basement membrane, international monopoly Main classification number plan is Int.Cl
7.BOID 71/00.
(2) background technology
Membrane separation technique is an emerging isolation technics, and nearly development decades be widely applied to many fields, and Application Areas enlarges constantly rapidly.Divide by form, film can be divided into flat sheet membrane, tubular membrane, rolled film and hollow-fibre membrane, plurality of advantages extensive uses such as wherein, hollow-fibre membrane is big because of its loading density, production technology simple, device miniaturization.Press material and divide, film can be divided into inoranic membrane, organic polymer film and special material with carbon element film etc., and wherein, organic polymer film purposes is the most extensive; By forming or structure, film can be divided into homogeneous membrane and composite membrane, composite membrane excellent performance wherein, but that manufacturing technology requires is high, complex process; Advantages such as press the microcellular structure of diffusion barrier, film can be divided into symmetry and asymmetric microcellular structure film, and wherein asymmetric microcellular structure film has efficiently, and is energy-conservation, and the life-span is long.Present film manufacturing technology then is devoted to develop high performance composite membrane and asymmetric microcellular structure film, and for example, USP No.6074718 has just reported a kind of asymmetric microcellular structure hollow fiber nanofiltration membrane of self-supporting strength.The technology of preparing of composite membrane mainly can be divided into two kinds of methods: the one, in the membrane surface coating technology; The 2nd, utilize interfacial polymerization to form the technology of functional layer in membrane surface.Preparing basement membrane rational in infrastructure, well behaved is one of key of preparation high performance composite membrane.The basement membrane that is used to make hollow fiber composite membrane at present all is a homogeneous membrane, just normally used hollow-fibre membrane.Because influences such as normally used this body structure of hollow-fibre membrane, material, after it makes hollow fiber composite membrane through further processing, its water flux descends significantly, has had a strong impact on the filter efficiency of hollow fiber composite membrane, have in addition lose use value.In addition, the existing hollow-fibre membrane that uses is after Combined Processing, and its mechanical strength also often can not satisfy actual instructions for use.
(JP63218213, JP04045830, JP62019205) report, hollow fiber composite membrane adopt Crossed Circle hole spinning head to spin compound hollow fiber ultrafiltration membrane according to existing patent documentation.Requiring to have core liquid, product when adopting Crossed Circle hole spinning head spinning hollow-fibre membrane is two cortex hollow-fibre membranes.This pair of cortex hollow-fibre membrane can increase the resistance that fluid passes through in the film use; In addition, the hollow-fibre membrane diameter of Crossed Circle hole spinning head spinning is relatively large, and its compressive resistance is also lower, can not adapt to operating pressure higher and the NF membrane that diameter is less or the requirement of reverse osmosis membrane preparation.
Summary of the invention
The technical problem to be solved in the present invention is, at the deficiencies in the prior art, and existing market and actual demand, design the used shower nozzle of a kind of composite spinning and use this shower nozzle to prepare hollow-fibre membrane composite membrane basement membrane method.This shower nozzle has simple in structure, prepares the hollow fiber composite membrane basement membrane and has higher flux and higher mechanical strength, can satisfy the characteristics such as instructions for use of the various hollow-fibre membranes of preparation.Adopting this shower nozzle to prepare the hollow fiber composite membrane basement membrane, to have method simple, characteristics such as adaptability is good, and effect is obvious.
The technical scheme that the present invention solve the technical problem is, designs the used shower nozzle of a kind of composite spinning, comprises nozzle body, shower nozzle base and nozzle cap; Internal layer casting film sap cavity is arranged between nozzle body and the nozzle cap, outer casting film sap cavity is arranged between nozzle body and the shower nozzle base; Have the internal layer casting solution inlet that communicates with internal layer casting film sap cavity on the described nozzle cap, have the outer casting solution inlet that communicates with outer casting film sap cavity on the described nozzle body, the outer casting solution outlet that on described shower nozzle base end face, has the internal layer casting solution outlet that communicates with described internal layer casting film sap cavity and communicate with outer casting film sap cavity, described internal layer casting solution outlet exports in concentric with outer casting solution, outer three C shape annular spaces outlet, the diameter that it is characterized in that described interior three C shape annular spaces outlet is 0.1～2.5mm, and the diameter of described outer three C shape annular spaces outlet corresponds to 0.4～4mm; The ratio of the annular space radial width size of described inside and outside three C shape annular spaces outlet is 1: 1.5～4.
The present invention has at first designed the used shower nozzle of described inside and outside concentric three C shape annular spaces outlet composite spinning, it mainly is the shape of having improved outlet, simple in structure, when being used for composite spinning method spinning hollow-fibre membrane, controllability is good, can spin out diameter less than the 0.5mm hollow-fibre membrane, and the hollow-fibre membrane that spins out has the premium properties of high strength, big flux, can satisfy the instructions for use of the various hollow-fibre membranes of preparation.
The purposes of the shower nozzle that composite spinning of the present invention is used is characterized in that this shower nozzle is used in hollow fiber composite membrane basement membrane preparation method's the composite spinning technology.
Shower nozzle of the present invention can be used to prepare the basement membrane of hollow fiber composite membrane, the hollow-fibre membrane that spins out is the hollow-fibre membrane of external pressure single skin, and its fracture morphology structure is divided into cortex and supporting layer structure, and the endodermis surface apertures is bigger, resistance was less when fluid passed through, and membrane flux is bigger; Simultaneously can spin the less hollow-fibre membrane of diameter, can improve the compressive resistance of film like this, thereby can satisfy the requirement of NF membrane or reverse osmosis membrane operating pressure.Described doughnut basement membrane can be microporous barrier or milipore filter.Utilizing the basement membrane of prepared different performance, come the more good hollow fiber composite membrane of processability, can be milipore filter, NF membrane or reverse osmosis membrane, also can be gas separation membrane.The composite membrane that adopts basement membrane of the present invention to prepare both can be used for the preparation of interfacial polymerization composite membrane, also can be used for the preparation of face coat method composite membrane.With the composite membrane of basement membrane preparation of the present invention, membrane flux is big, film mechanical strength height, can prepare the hollow fiber composite membrane in interior external diameter of series and aperture with this type of basement membrane.The present invention adopts composite spinning technology spinning hollow fiber composite membrane basement membrane, for being applied in the composite membrane preparation, heteropolymer more provides technical foundation, also lay a good foundation for the performance that improves hollow fiber composite membrane, make the polymer of more property excellence can be applied to the making of composite hollow fiber membrane, thereby enlarge the range of application of hollow-fibre membrane.
Description of drawings
Fig. 1 is the vertical section schematic diagram of a kind of embodiment of the used shower nozzle of composite spinning of the present invention;
Fig. 2 is the described concentric inside and outside three C shape annular spaces outlet shape and structure schematic diagram of a kind of embodiment of the used shower nozzle of composite spinning of the present invention.
The specific embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof:
The used shower nozzle (referring to Fig. 1,2) of a kind of composite spinning of the present invention's design comprises nozzle body 3, shower nozzle base 4 and nozzle cap 2; Internal layer casting film sap cavity 5 is arranged between nozzle body 3 and the nozzle cap 2, outer casting film sap cavity 7 is arranged between nozzle body 3 and the shower nozzle base 4; Have the internal layer casting solution inlet 1 that communicates with internal layer casting film sap cavity 5 on the described nozzle cap 2, have the outer casting solution inlet 6 that communicates with outer casting film sap cavity 7 on the described nozzle body 3, the outer casting solution outlet 9 that has the internal layer casting solution outlet 8 that communicates with described internal layer casting film sap cavity 5 and communicate with outer casting film sap cavity 7 on described shower nozzle base 4 bottom surfaces is characterized in that described internal layer casting solution outlet 8 and outer casting solution outlet 9 are concentric inside and outside three C shape annular spaces outlet 8,9.Described nozzle body 3, shower nozzle base 4 and nozzle cap 2 three parts are formed spinning nozzle integral body, and embodiment adopts the bolting assemble method, also can adopt additive method.Between nozzle body 3, shower nozzle base 4 and nozzle cap 2 three parts seal good seal is arranged, no liquid leaks outside.Not connected between described internal layer casting film sap cavity 5 and the outer casting film sap cavity 7.During spinning, the internal layer casting solution enters in the internal layer casting film sap cavity 5 through internal layer casting solution inlet 1, and ejection from interior three C shape annular spaces outlet 8 enters coagulating bath; Outer casting solution enters in the outer casting film sap cavity 7 through outer casting solution inlet 6 simultaneously, and ejection from outer three C shape annular spaces outlet 9 enters coagulating bath, solidify to form hollow-fibre membrane.Described internal layer casting solution inlet 1 and outer casting solution 6 aperture positions that enter the mouth are not limited by embodiment.The center at described nozzle cap 2 is opened in the position of the internal layer casting solution inlet 1 of embodiment; The sidewall of 6 aperture positions and outer casting solution enters the mouth in nozzle body 3.
The used shower nozzle of composite spinning of the present invention is further characterized in that the diameter of described interior three C shape annular spaces outlet 8 is 0.1～2.5mm, and the diameter of described outer three C shape annular spaces outlet 9 corresponds to 0.4～4mm; The ratio of the annular space radial width size of described inside and outside three C shape annular spaces outlet 8,9 is 1: 1.5～4.The ratio of the annular space radial width size of described inside and outside three C shape annular spaces outlet 8,9 is preferably 1: 2.5～and 3.5.The spinning nozzle of inside and outside concentric three C shape annular spaces outlet of the present invention (being called for short two three C shower nozzles), two " three C " annular space outlets 8,9 are respectively inside and outside polymer casting solution extrusion, the centre does not have the core liquid outlet of prior art, thereby can spin out the external pressure hollow-fibre membrane of minor diameter, high strength, single skin.By adjusting the size of described annular space diameter, can control the size in the inside and outside footpath of hollow-fibre membrane of preparing; And, can control the thickness of the hollow-fibre membrane membranous wall of preparing by controlling the size of described annular space radial width.Test shows, according to product needed and quality requirement, the annular space that spins cortex is 1: 1.5～1: 4 with the ratio of the annular space radial width size of spinning supporting layer, and the ratio of preferred annular space radial width size is 1: 2.5～3.5.
The shower nozzle of the present invention's design can be used as the special equipment of preparation hollow fiber composite membrane basement membrane.This hollow fiber composite membrane basement membrane preparation method comprises casting solution preparing process, composite spinning technology and aftertreatment technology successively, and each operation substantially all is a prior art, and key is to have adopted the shower nozzle of institute of the present invention unique design.In the described casting solution preparing process of preparation method of the present invention, can adopt identical component, concentration or/and the prescription of different component, concentration; The casting solution of cortex and supporting layer generally uses with a kind of solvent, and when coextrusion, help mutual diffusion like this, and separating interface between tangible supporting layer and the cortex can not occur, thus the hollow-fibre membrane of formation excellent performance.Described composite spinning technology coextrusion be asymmetric mesopore tunica fibrosa, comprise dense layer surface and loose bottom; Extrusion temperature is 10～90 ℃, and it is 0～50 ℃ that the temperature of the aqueous solution (volume ratio of water and solvent was not less than 1: 1) of water or solvent is adopted in coagulating bath; Adopting different the composition and the coagulating bath of different temperatures, is in order to control the speed of casting solution solidified forming when spinning doughnut well.The fast hole that then forms of curing rate is comparatively fine and closely woven, otherwise then comparatively sparse, thereby controls the pore size of hollow-fibre membrane thus, produces required micro-filtration membrane, milipore filter or NF membrane.The inventive method can spin out the basement membrane of doughnut micro-filtration, ultrafiltration and Nano filtering composite membrane of the serial fibre diameter of external diameter 0.4～4mm, internal diameter 0.1～2.5mm.Described parameter can be selected as required.
The polymer wide adaptability that the inventive method spinning hollow-fibre membrane basement membrane uses does not have special requirement, can adopt various material of preparing commonly used, comprises polysulfones, polyether sulfone, polyether-ketone, polyacrylonitrile, Kynoar, cellulose acetate etc.It can be that same concentration is or/and component also can be that variable concentrations is or/and the method for designing of component that described casting solution preparing process can adopt cortex and supporting layer according to the requirement of product.For example, the polysulfones solution that can select same component variable concentrations for use is spun into hollow fiber ultrafiltration membrane respectively as the cortex and the supporting layer of hollow-fibre membrane, can be used as the basement membrane of preparation doughnut composite nanometer filtering film or reverse osmosis membrane; And for example, the polysulfones solution that can select low concentration for use is as supporting layer, and the Kynoar solution of selecting high concentration for use is spun into hollow fiber microfiltration membrane as cortex, as the basement membrane of preparation doughnut composite hyperfiltration membrane.Simultaneously, preparation method of the present invention can be easily kind, concentration and additive by control cortex component prepare different apertures, the film of densification cortex in various degree, can make micro-filtration, ultrafiltration or NF membrane.The preparing process of not addressing, composite spinning technology and aftertreatment technology are prior art.Utilize the inventive method can spin out the serial fibre diameter of external diameter 0.4～4mm, internal diameter 0.1～2.5mm and the basement membrane of the hollow fiber composite membrane in different apertures (comprising micro-filtration membrane, milipore filter and NF membrane).
The inventive method mainly is to utilize composite spinning technology to spin a kind of hollow-fibre membrane, and uses with its basement membrane as hollow fiber composite membrane.With regard to its fracture morphology, this basement membrane has tangible dense layer surface and loose supporting layer structure.And the cortex of the hollow-fibre membrane that usual method spins out and weaker zone are transition gradually, and cortex is thicker.Because the feed concentration of its weaker zone is identical with cortex, the weaker zone porosity is relatively low, so the permeable resistance of hollow-fibre membrane of prior art spinning is big, and under equal conditions membrane flux is little.Prior art generally adopts dicyclo spinning head spinning hollow-fibre membrane, because inside and outside two cortex is arranged, resistance is bigger, and diameter is thicker relatively, and flux also all is subjected to different restrictions with intensity.And the composite spinning method of concentric inside and outside two " three C " spinning heads of employing the present invention design just can spin out the high strength external pressure hollow-fibre membrane of the thinner single skin of diameter, and then can produce high strength, high-throughout various hollow fiber composite membranes.
Provide specific embodiment below:
Embodiment 1:
(1) preparation of spinning solution: press following formulated spinning solution: cortex spinning solution [polysulfones 25% (wt), N, N dimethylacetylamide 65% (wt), polyvinylpyrrolidone 9% (wt), saturated lithium chloride solution 1% (wt)] and supporting layer spinning solution [polysulfones 12% (wt), N, N dimethylacetylamide 80% (wt), polyvinylpyrrolidone 8% (wt)];
(2) use two " three C " shape spinning head of the present invention, adopt the hollow fiber composite membrane basement membrane of composite spinning method spinning different-diameter, 45 ℃ of spinning solution temperature, the water of 25 ℃ of temperature is adopted in coagulating bath, soaks 24 hours in water after the film forming;
(3) hollow-fibre membrane that will soak is put into 30% glycerine water solution and was soaked 24 hours, and cool system was taken out 24～48 hours in the back, and the basement membrane that promptly can be used as hollow fiber composite membrane is stand-by.
More than Zhi Bei hollow-fibre membrane is as the composite nanometer filtering film basement membrane, and internal layer is a supporting layer, and skin is a cortex, and external diameter and cortex and supporting layer thickness are as shown in table 1 in it.Burst pressure and compressive resistance are as shown in table 2.By data in the table 2 as can be seen, the mechanical performance of basement membrane is good.
Table 1
| Sample number | Internal diameter (mm) | External diameter (mm) | Supporting layer thickness (mm) | Skin thickness (mm) |
| 1 2 3 4 5 | 0.10 0.15 0.20 0.30 0.50 | 0.40 0.40 0.60 0.80 1.20 | 0.13 0.10 0.15 0.20 0.25 | 0.02 0.025 0.05 0.05 0.10 |
Table 2
| Sample number | Burst pressure (Mpa) | Compressive resistance (Mpa) |
| 1 2 3 4 5 | - - 1.0 0.6 0.5 | 2.4 2.0 1.5 0.8 0.5 |
Embodiment 2:
(1) preparation of spinning solution: press following formulated spinning solution: cortex spinning solution [polysulfones 45% (wt), dimethyl sulfoxide (DMSO) 50% (wt), polyvinylpyrrolidone 5% (wt)] and supporting layer spinning solution [polysulfones 30% (wt), N, N dimethyl formamide 60% (wt), polyvinylpyrrolidone 9% (wt), saturated lithium chloride solution 1% (wt)];
(2) use two " three C " shape spinning head of the present invention, adopt the hollow fiber composite membrane basement membrane of composite spinning method spinning different-diameter, 50 ℃ of spinning solution temperature, the water of 30 ℃ of temperature is adopted in coagulating bath, soaks 24 hours in water after the film forming;
(3) hollow-fibre membrane that will soak is put into 35% glycerine water solution and was soaked 24 hours, and cool system was taken out 24～48 hours in the back, and the basement membrane that promptly can be used as hollow fiber composite membrane is stand-by.
The hollow-fibre membrane of above method preparation can be used as the basement membrane of reverse osmosis composite membrane, and internal layer is a supporting layer, and skin is a cortex.
Claims (3)
1. the shower nozzle that composite spinning is used comprises nozzle body (3), shower nozzle base (4) and nozzle cap (2); Between nozzle body (3) and the nozzle cap (2) internal layer casting film sap cavity (5) is arranged, between nozzle body (3) and the shower nozzle base (4) outer casting film sap cavity (7) is arranged; Have the internal layer casting solution inlet (1) that communicates with internal layer casting film sap cavity (5) on the described nozzle cap (2), have the outer casting solution inlet (6) that communicates with outer casting film sap cavity (7) on the described nozzle body (3), on described shower nozzle base (4) bottom surface, have internal layer casting solution outlet (8) that communicates with described internal layer casting film sap cavity (5) and the outer casting solution outlet (9) that communicates with outer casting film sap cavity (7), described internal layer casting solution outlet (8) and outer casting solution export (9) be concentric in, outer three C shape annular spaces outlets (8), (9), the diameter that it is characterized in that described interior three C shape annular spaces outlets (8) is 0.1～2.5mm, and the diameter of described outer three C shape annular spaces outlets (9) corresponds to 0.4～4mm; The ratio of the annular space radial width size of described inside and outside three C shape annular spaces outlets (8), (9) is 1: 1.5～4.
2. the used shower nozzle of composite spinning according to claim 1 is characterized in that the ratio of the annular space radial width size of described inside and outside three C shape annular spaces outlets (8), (9) is 1: 2.5～3.5.
3. the purposes of the used shower nozzle of claim 1 or 2 described composite spinnings is characterized in that this shower nozzle is used in hollow fiber composite membrane basement membrane preparation method's the composite spinning technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100940009A CN1328422C (en) | 2004-12-23 | 2004-12-23 | Blow head for composite spinning and uses thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100940009A CN1328422C (en) | 2004-12-23 | 2004-12-23 | Blow head for composite spinning and uses thereof |
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| CN1632192A CN1632192A (en) | 2005-06-29 |
| CN1328422C true CN1328422C (en) | 2007-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100940009A Expired - Fee Related CN1328422C (en) | 2004-12-23 | 2004-12-23 | Blow head for composite spinning and uses thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013016628A1 (en) * | 2013-10-08 | 2015-04-09 | Trützschler GmbH & Co Kommanditgesellschaft | Spinneret for extruding self-crimping hollow fibers and self-crimping hollow fibers and method for producing self-crimping hollow fibers |
| CN111686587B (en) * | 2020-06-29 | 2022-04-15 | 山东理工大学 | Method for preparing metal organic framework material film on double-layer hollow fiber |
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| CN2119430U (en) * | 1992-05-02 | 1992-10-21 | 中国纺织大学 | Adjustable hollow tunica fibrosa spinneret |
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| CN2503079Y (en) * | 2001-10-29 | 2002-07-31 | 中国石化仪征化纤股份有限公司 | Extrusion nozzle for high-speed spinning hollow filament fibre |
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| CN1552507A (en) * | 2003-05-27 | 2004-12-08 | 天津膜天膜工程技术有限公司 | Method and apparatus for primary shaping composite or modified hollow fibre membrane |
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2004
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Patent Citations (6)
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| CN2119430U (en) * | 1992-05-02 | 1992-10-21 | 中国纺织大学 | Adjustable hollow tunica fibrosa spinneret |
| CN1103814A (en) * | 1993-12-18 | 1995-06-21 | 中国科学院生态环境研究中心 | Method for fabricating composite hellow fibre ultrafiltration film and the products |
| CN1128176A (en) * | 1995-11-24 | 1996-08-07 | 天津纺织工学院膜天膜技术工程公司 | Polyvinylidene fluoride hollow fibre porous membrane manufacturing method |
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