CN103041712A - High-strength hollow fiber membrane - Google Patents
High-strength hollow fiber membrane Download PDFInfo
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- CN103041712A CN103041712A CN2013100083283A CN201310008328A CN103041712A CN 103041712 A CN103041712 A CN 103041712A CN 2013100083283 A CN2013100083283 A CN 2013100083283A CN 201310008328 A CN201310008328 A CN 201310008328A CN 103041712 A CN103041712 A CN 103041712A
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Abstract
The invention relates to the field of composites, and particularly relates to and discloses a high-strength hollow fiber membrane. The fiber membrane comprises a membrane body layer, wherein a plurality of short fibers are blended in the membrane body layer; the diameters of the short fibers are 0.001mm-1mm; the lengths of the short fibers are 0.01-1mm; and the volume percentage of the short fibers in the membrane body layer is 0.5-10%. According to the high-strength hollow fiber membrane, as the short fibers are added into a membrane body material, the membrane has the advantages that the membrane is high in physical tensile strength, long in service life and low in cost, the compression strength of a membrane filament is improved, a membrane material does not fall, and the membrane flux is not influenced.
Description
Technical field
The present invention relates to field of compound material, relate in particular to a kind of high-intensity hollow tunica fibrosa.
Background technology
Traditional wastewater regeneration treatment technology exists the shortcomings such as effluent characteristics is not high, occupation of land is large, poor stability.Membrane separation technique has the advantages such as energy consumption is low, process is simple, separative efficiency is high, non-environmental-pollution, it is the important new and high technology that solves the contemporary energy, resources and environment problem, that other any chemical separation technology is irreplaceable, it uses the fields such as involved chemical industry, food, medicine, biochemistry, environmental protection, to energy savings, raise the efficiency, environment purification etc. made significant contribution, is called one of ten the most rising large new and high technologies of 21st century abroad.
In the market hollow-fibre membrane commonly in the membrane body layer without supporter, shortcoming is: its physics hot strength is not enough, the easily broken deformation of filament of film silk; Also have in the membrane body layer with hollow braided rope, this kind hollow-fibre membrane usually flux is inadequate, and processing technology is complicated, and cost is high.
Summary of the invention
Exist the physics hot strength not enough for existing hollow-fibre membrane, the defective of the easily broken deformation of filament of film silk, it is strong and water flux is high, the high-intensity hollow tunica fibrosa that cost is low to the invention provides a kind of physics hot strength.
For achieving the above object, the present invention adopts following technical scheme:
A kind of high-intensity hollow tunica fibrosa comprises the membrane body layer, the some short fibers of blending in the described membrane body layer.Short fiber is evenly distributed in the membrane body layer, because the booster action of short fiber, the physics hot strength of hollow-fibre membrane is minimum can be increased more than the several times, and can further increase the doughnut film strength by the quantity that increases short fiber.Because vertically the effect of short fiber is so that film silk compression strength is strengthened, it is indeformable to be subject to 1.5-3mpa pressure.Film silk bulk strength significantly promotes, so that the film silk is not add more than the twice of hollow-fibre membrane of short fiber service life.Since short fiber be blending in the membrane body layer, short fiber and membrane material have certain compatibility, and complete tunicle bulk layer mate-rial parcel, separation can not occur peel off, and lose filtering function.
As preferably, the diameter of described short fiber is 0.001mm-1mm, and length is 0.01-1mm.The short fiber of above-mentioned specification makes the present invention can reach the water flux that the intensity that needs does not affect again hollow-fibre membrane.
As preferably, the material of described short fiber is polyacrylonitrile, terylene, nylon, polytetrafluoroethylene (PTFE), polyvinyl chloride, polypropylene, spandex.The membrane body layer material can be: Kynoar, polysulfones, polyether sulfone, polytetrafluoroethylene (PTFE), polyethylene, polyacrylonitrile etc.Short fiber selects these materials to have preferably compatibility by modification and membrane body layer material.
As preferably, the percent by volume of described short fiber and membrane body layer is 0.5%-10%.The volume that short fiber is embedded in the membrane body layer is little, and is very little to the film forming structure influence, and the water flux of film is more than the twice of kernmantle structural membrane, with suitable without the support hollow tunica fibrosa.
A kind of preparation method of high-intensity hollow tunica fibrosa is:
1) adds successively membrane body material (concentration is 15-23 wt/v %) in the molten material still, Tween 80 or polyethylene glycol are as additive (concentration is 5-15 wt/v %), 1-METHYLPYRROLIDONE or N, dinethylformamide or N, the N-dimethylacetylamide is solvent (concentration is 50-80 wt/v %), open the shaft sealing pressing hurdle of molten material still, 60-100 ℃ lower to fully stirring 6-24h, obtain casting solution, be 0.5%-10% with percent by volume afterwards, diameter is 0.001mm-1mm, length is that the short fiber of 0.01-1mm is sneaked in the casting solution, fully stirs and makes the mixing casting solution.
2) will mix casting solution and clamp-on the tube-type hollow fiber spinning nozzle, under the spinning speed of 15-40m/min, mixing casting solution is extruded by air pressure, net filtration and measuring pump enter the spinning head casting solution and enter the hole after filtration, enter deionized water in the hole film-forming that after entering coagulating bath after the spinning head generation composite molding, is separated with core liquid, the coagulating bath gel media is the water of steady temperature, coolant-temperature gage is controlled at 18-45 ℃, spinning temperature 20-80 ℃, core liquid is deionized water, and temperature is 5-60 ℃.
3) prepare hollow fiber composite membrane by dried-wet method.Obtained hollow-fibre membrane pore-creating character is better, and fenestra is evenly distributed, and pore size distribution range is narrower, and hydrophilicity is better.Pure water flux can reach 380L/m2h, 0.1MPa above (25 ℃ of probe temperatures), and in the 1g/L bovine serum albumin cushioning liquid retention experiments, rejection is 99%.
A kind of high-intensity hollow tunica fibrosa of the present invention has the following advantages:
1) the physics hot strength is high: because the booster action of short fiber, its physics hot strength is minimum can be increased more than the several times;
2) film silk compression strength strengthens: since vertically the effect of short fiber so that the film silk to be subject to 1.5-3mpa pressure indeformable;
3) long service life: because film silk bulk strength significantly promotes, so that the film silk is not add more than the twice of hollow-fibre membrane of short fiber service life;
4) membrane material can not peel off: adopt the blending hollow-fibre membrane of kernmantle, coating is separated easily with kernmantle and is peeled off, and loses filtering function; And separation because short fiber material and bulk material have certain compatibility, and complete tunicle bulk material parcel, can not occur to peel off and lose filtering function in the present invention, thereby has greatly increased the service life of film; 5) cost is lower than the blending hollow-fibre membrane of kernmantle: in the blending hollow-fibre membrane material cost of kernmantle the kernmantle cost to account for over half, so that cost doubles than the present invention is above; 6) membrane flux is uninfluenced: because the short fiber of introducing has certain intermiscibility by modification with membrane material, and the volume that is embedded in the film is little, only accounts for the 0.5-10% of membrane material volume, and is very little to the film forming structure influence, so the water flux of film can reach 380L/m
2H, 0.1MPa above (25 ℃ of probe temperatures) is more than 2 times of kernmantle structural membrane, with suitable without the support hollow tunica fibrosa.
Description of drawings
Fig. 1 is the structural representation of a kind of high-intensity hollow tunica fibrosa of the present invention embodiment.
The specific embodiment
The present invention is described further below in conjunction with Fig. 1 and the specific embodiment.
A kind of high-intensity hollow tunica fibrosa comprises membrane body layer 1, even blend staple 2 in the described membrane body layer 1.The material of membrane body layer 1 is: Kynoar, the material of short fiber are polyacrylonitrile, and the short fiber diameter is 0.001mm, length is 0.1mm, shared volume ratio is 0.5% in hollow-fibre membrane, and after tested, its hot strength is under the 11N(equal conditions, the hot strength that does not add the hollow-fibre membrane of short fiber is about 4N), when 0.1mpa, its resistance to compression situation is indeformable, and is 0.1mpa at pressure, when the test water temperature was 25 degrees centigrade, water flux was 399 L/m
2H.
The making step of a kind of high-intensity hollow tunica fibrosa of the present invention is:
1) add successively membrane body material Kynoar (concentration is 18.5wt/v %) in the molten material still, polyethylene glycol is solvent (concentration is 75wt/v %) as additive (concentration is 6.5wt/v %), 1-METHYLPYRROLIDONE, open the shaft sealing pressing hurdle of molten material still, 80 ℃ lower to fully stirring 12h, obtain casting solution, be 1% with percent by volume afterwards, diameter is 0.001mm, and length is that the Orlon of 0.1mm is sneaked in the casting solution, fully stirs and makes the mixing casting solution.
2) will mix casting solution and clamp-on the tube-type hollow fiber spinning nozzle, under the spinning speed of 18m/min, mixing casting solution is extruded by air pressure, net filtration and measuring pump enter the spinning head casting solution and enter the hole after filtration, enter deionized water in the hole film-forming that is separated with core liquid after entering coagulating bath after the spinning head generation composite molding, and the coagulating bath gel media is the water of steady temperature, coolant-temperature gage is controlled at 45 ℃, 20 ℃ of spinning temperatures, core liquid are deionized water, and temperature is 40 ℃.
3) prepare hollow fiber composite membrane by dried-wet method.Obtained hollow-fibre membrane pore-creating character is better, and fenestra is evenly distributed, and pore size distribution range is narrower, and hydrophilicity is better.Pure water flux can reach 380L/m2h, 0.1MPa above (25 ℃ of probe temperatures), and in the 1g/L bovine serum albumin cushioning liquid retention experiments, rejection is 99%
The present invention also has following distortion, and the diameter of its middle short fiber, length, material, shared volume ratio is as shown in table 1 in hollow-fibre membrane, and its corresponding hot strength, resistance to compression situation, water flux size are also as shown in table 1:
Table 1
As can be seen from Table 1: the adding of (1) short fiber does not have influence on the water flux of film silk substantially.(2) booster action of short fiber is so that the hot strength of film silk is greatly increased, and along with the increase of short fibre content, hot strength can further improve.(3) because the compatibility of various materials and film body has different, so the short fiber of various materials is not identical to the stiffening effect of film silk hot strength yet.
Being preferred embodiment of the present invention only in sum, is not to limit practical range of the present invention, and all equivalences of doing according to the content of the application's claim change and modify, and all should be technology category of the present invention.
Claims (4)
1. a high-intensity hollow tunica fibrosa comprises membrane body layer (1), it is characterized in that: the some short fibers of blending (2) in the described membrane body layer (1).
2. a kind of high-intensity hollow tunica fibrosa according to claim 1, it is characterized in that: the diameter of described short fiber (2) is 0.001mm-1mm, length is 0.01-1mm.
3. a kind of high-intensity hollow tunica fibrosa according to claim 1, it is characterized in that: the material of described short fiber (2) is polyacrylonitrile, terylene, nylon, polytetrafluoroethylene (PTFE), polyvinyl chloride, polypropylene, spandex.
4. a kind of high-intensity hollow tunica fibrosa according to claim 1 is characterized in that: described short fiber (2) is 0.5%-10% with the percent by volume of membrane body layer (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100083283A CN103041712A (en) | 2013-01-10 | 2013-01-10 | High-strength hollow fiber membrane |
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| CN2013100083283A CN103041712A (en) | 2013-01-10 | 2013-01-10 | High-strength hollow fiber membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721573A (en) * | 2014-01-08 | 2014-04-16 | 宁波恺谱瑞膜科技有限公司 | High-strength hollow fiber film and preparation method thereof |
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| CN1899677A (en) * | 2005-07-19 | 2007-01-24 | 天津工业大学 | Method for producing hollow fiber film |
| CN101138706A (en) * | 2006-09-04 | 2008-03-12 | 胡萍 | Bunchiness hollow fiber film and method of preparing the same |
| CN102188911A (en) * | 2011-05-10 | 2011-09-21 | 浙江开创环保科技有限公司 | Polyvinylidene hollow fiber membrane with filament support material and preparation method thereof |
| CN102198372A (en) * | 2010-03-25 | 2011-09-28 | 吕晓龙 | Separating membrane and preparation method thereof |
| CN102489170A (en) * | 2011-12-23 | 2012-06-13 | 重庆绿色智能技术研究院 | Hollow fiber ultrafilter membrane and its preparation method |
| CN203090776U (en) * | 2013-01-10 | 2013-07-31 | 浙江开创环保科技有限公司 | High-strength hollow fiber membrane |
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- 2013-01-10 CN CN2013100083283A patent/CN103041712A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1899677A (en) * | 2005-07-19 | 2007-01-24 | 天津工业大学 | Method for producing hollow fiber film |
| CN101138706A (en) * | 2006-09-04 | 2008-03-12 | 胡萍 | Bunchiness hollow fiber film and method of preparing the same |
| CN102198372A (en) * | 2010-03-25 | 2011-09-28 | 吕晓龙 | Separating membrane and preparation method thereof |
| CN102188911A (en) * | 2011-05-10 | 2011-09-21 | 浙江开创环保科技有限公司 | Polyvinylidene hollow fiber membrane with filament support material and preparation method thereof |
| CN102489170A (en) * | 2011-12-23 | 2012-06-13 | 重庆绿色智能技术研究院 | Hollow fiber ultrafilter membrane and its preparation method |
| CN203090776U (en) * | 2013-01-10 | 2013-07-31 | 浙江开创环保科技有限公司 | High-strength hollow fiber membrane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721573A (en) * | 2014-01-08 | 2014-04-16 | 宁波恺谱瑞膜科技有限公司 | High-strength hollow fiber film and preparation method thereof |
| CN103721573B (en) * | 2014-01-08 | 2016-02-03 | 宁波恺谱瑞膜科技有限公司 | A kind of High-strength hollow fiber film and preparation method thereof |
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Application publication date: 20130417 |