CN107308825A - A kind of manufacture method of internal pressure tubular multilayer composite separation membrane - Google Patents
A kind of manufacture method of internal pressure tubular multilayer composite separation membrane Download PDFInfo
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- CN107308825A CN107308825A CN201610268980.2A CN201610268980A CN107308825A CN 107308825 A CN107308825 A CN 107308825A CN 201610268980 A CN201610268980 A CN 201610268980A CN 107308825 A CN107308825 A CN 107308825A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/04—Tubular membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/26—Polyalkenes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/48—Polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/50—Polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/56—Polyamides, e.g. polyester-amides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
- B01D71/68—Polysulfones; Polyethersulfones
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of manufacture method of internal pressure tubular multilayer composite separation membrane, it is divided into a, is well mixed by mass percentage by film forming polymer, film forming diluent, into membrane permeablizer, film forming pore-creating agent, film for additive, 130 390 DEG C of melting mixings are heated to uniformly by thermally induced phase separation, extrusion shaping machine, the inner layer film of tubular membrane is cooled to after being extruded through tubular membrane inner membrance die orifice；B, outside inner layer film using circular loom work out longitude and latitude webmaster, it is ensured that longitude and latitude webmaster is close on the surface of inner layer film；C, the outer layer coating last layer outer membrane in inner layer film laminating longitude and latitude webmaster；D, obtained internal pressure tubular multilayer composite separation membrane semi-finished product through ethanol or isopropyl alcohol extraction are obtained into the several steps of internal pressure tubular multilayer composite separation membrane finished product.The present invention has good separating property, compound fastness and mechanical property concurrently, improves the effective membrane area of filtering, is prevented effectively from membrane tube rupture or filtering film layer and supporting layer separating delamination and damages, so as to improve service efficiency and the life-span of film.
Description
Technical field
The present invention relates to a kind of manufacture method of composite membrane, more particularly to a kind of internal pressure tubular multilayer composite separation membrane
Manufacture method.
Background technology
Tubular membrane, efficiently separates material as one kind, water process and feed separation etc. is widely used at present
Every field.According to use requirement, generally it is referred to as external pressure tube using outer surface as the tubular membrane of separating. functional layer
Formula film；The tubular membrane of inner surface as separating. functional layer is referred to as internal pressure tubular membrane.Come for internal pressure tubular membrane
Say, to ensure smoothness of the liquid in Bottomhole pressure, need to keep film body that there is higher supportive；Due to interior
Press filtration is usually used in the higher occasion of system viscosity, also needs to increase the internal diameter, pressure-resistant, wear-resisting of internal pressure tubular membrane
With resistance to impact of water hammer performance；Meanwhile, to improve separation accuracy, it need to accurately control the hole of inner surface separating layer
Footpath.
Existing internal pressure tubular membrane mainly causes (LIPS) legal system that is separated using non-woven fabrics welded pipe coating solvent
Standby composite membrane, the internal pressure tubular membrane that this method is obtained, inner surface has aperture compacted zone, separation accuracy
It is higher, but shortcoming be to be coated with compound fastness it is relatively low, in actual application, it is easy to because of fastness difference
Produce separating layer with nonwoven layer to depart from, cause its service life to decline；Simultaneously as being welded using non-woven fabrics
Pipe is connected into, its weld reduces the effective filtration area of film without filtering function, so that it is logical to reduce filtering
Amount.In addition, because preparation method is limited, can only select and be applied to the material that solvent causes phase separation (LIPS) method
Material, therefore also limited in material of preparing selection by larger.
The content of the invention
It is multiple the invention provides a kind of interior pressure-pipe type multilayer in order to solve the weak point present in above-mentioned technology
Close the manufacture method of film.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of interior pressure-pipe type multilayer
The manufacture method of composite membrane, is divided into following steps：
A, by mass percentage by 20~50% internal layer film forming polymers, 30~60% internal layer film forming diluents,
0.5~5% internal layer is mixed into membrane permeablizer, 5~30% internal layer film forming pore-creating agents, 5~30% internal layer film for additive
Close uniform, internal layer film forming material is made by thermally induced phase separation, obtained internal layer film forming material is passed through into twin-screw
Extrusion shaping machine is heated to 130-390 DEG C of melting mixing uniformly, is cooled to after being extruded through tubular membrane inner membrance die orifice
The inner layer film of tubular membrane；
B, made from step a outside inner layer film using circular loom work out longitude and latitude webmaster, it is ensured that longitude and latitude webmaster
It is close on the surface of inner layer film；
C, the outer layer coating last layer outer membrane in inner layer film laminating longitude and latitude webmaster；Wherein, outer membrane is outer
Layer film forming material is identical with internal layer film forming material；Outer layer film forming material is heated to 130- by twin-screw extrusion forming machine
390 DEG C of melting mixings are uniform, through the extrusion coated one layer of thin outer membrane of tubular membrane outer layer coating head；Tubular membrane
Inner layer film and outer membrane by the mesh melting patch jail of longitude and latitude webmaster, obtain internal pressure tubular multilayer composite separation membrane half
Finished product；
D, obtained internal pressure tubular multilayer composite separation membrane semi-finished product through ethanol or isopropyl alcohol extraction are obtained into interior pressure-pipe type
Multilayer complex films finished product.
Further, one layer of nanofiltration membrane coat can be coated in the inner surface of interior pressure-pipe type multilayer complex films finished product,
Inner pressed nanofiltration tubular membrane is made.
The present invention internal layer film forming polymer for polyethylene, polypropylene, polyether sulfone, polysulfones, polyvinyl chloride,
One or more kinds of combinations in polyamide, Kynoar, polyurethane, makrolon.
Internal layer film forming diluent be polyethylene, polypropylene, polyether sulfone, polysulfones, polyvinyl chloride, polyamide,
Kynoar, polyurethane, makrolon one or more kinds of mixed diluent therein.
Internal layer into membrane permeablizer be penetrating agent JFC or penetrant t.
Film for additive be lithium chloride, calcium chloride, polyethylene glycol, PVP, tween-
80th, polysiloxanes, silica, titanium dioxide one or more kinds of combination therein.
150~1000 microns of the thickness of pipe wall of inner layer film；The thickness of outer membrane is 25~100 microns.
The radical of the meridional fibers silk of longitude and latitude webmaster is 5~50, and parallel fiber silk is using 1 winding, latitude
The spacing of line fiber silk is 20~3000 microns, and the thickness of longitude and latitude webmaster is 3~20 microns.
Using internal pressure tubular multilayer composite separation membrane made from the manufacture method of the present invention, as its external diameter≤3mm,
It can be used as hollow-fibre membrane.
The present invention has the following technical effect that：
(1), preparation method of the invention has good separating property, compound fastness and mechanical property concurrently,
The effective membrane area of filtering is improved, is prevented effectively from during use caused by operating pressure is excessive with impact of water hammer
Membrane tube rupture or filtering film layer and supporting layer separating delamination and damage, so as to improve service efficiency and the longevity of film
Life.
(2), preparation method of the invention not only expands the range of choice of internal pressure tubular membrane filmogen, together
When employ intermediate course longitude and latitude braiding network management technology can easily control weave webmaster meridional fibers silk root
Number, parallel fiber silk spacing so that size that is convenient, accurately controlling webmaster hole, improve compound fastness and
Membrane tube wall thickness is reduced, the various defects that existing internal pressure tubular membrane is present are overcome, and taken into account internal pressure tubular membrane
Performance and cost, in the expansion beneficial to internal pressure tubular membrane application field.
(3), preparation method of the invention, which employs into membrane permeablizer, can preferably improve the speed that water passes through film
Degree, improves the service efficiency of film.
(4), preparation method of the invention uses thermally induced phase separation and twin-screw extrusion moulding process, leads to
The outside dimension for changing extrusion mould-outlet is crossed, makes external diameter≤3mm of obtained internal pressure tubular multilayer composite separation membrane
When, you can the internal pressure tubular multilayer composite separation membrane of small external diameter is obtained, in actual application in can effectively replace
Hollow fiber film is used.
Brief description of the drawings
Fig. 1 is the Making programme block diagram of the present invention.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
As shown in figure 1, the present invention is divided into following steps：
A, by mass percentage by 20~50% internal layer film forming polymers, 30~60% internal layer film forming diluents,
0.5~5% internal layer is mixed into membrane permeablizer, 5~30% internal layer film forming pore-creating agents, 5~30% internal layer film for additive
Close uniform, internal layer film forming material is made by thermally induced phase separation, obtained internal layer film forming material is passed through into twin-screw
Extrusion shaping machine is heated to 130-390 DEG C of melting mixing uniformly, is cooled to after being extruded through tubular membrane inner membrance die orifice
The inner layer film of tubular membrane, 150~1000 microns of the thickness of pipe wall of its inner layer film；
Wherein, internal layer film forming polymer be polyethylene, it is polypropylene, polyether sulfone, polysulfones, polyvinyl chloride, poly-
One kind in acid amides, Kynoar, polyurethane, makrolon.
Internal layer film forming diluent be polyethylene, polypropylene, polyether sulfone, polysulfones, polyvinyl chloride, polyamide,
Kynoar, polyurethane, makrolon a kind of diluent therein or more than one mixed diluent.
As dibutyl phthalate, dioctyl phthalate, soybean oil, paraxylene, tributyl phosphate,
One or more kinds of mixtures in tetrahydrofuran, diphenyl carbonate.
It is a kind of special auxiliary agent into membrane permeablizer, can be preferably with quick, uniform, wetting function is permeated
Ground improves the speed that water passes through film, improves the service efficiency of film, can select penetrating agent JFC (fatty alcohol
APEO) or penetrant t (disecoctylmaleate sodium sulfonate).
Film for additive be lithium chloride, calcium chloride, polyethylene glycol, PVP, tween-
80th, polysiloxanes, silica, titanium dioxide one or more kinds of combination therein.
B, made from step a outside inner layer film using circular loom work out longitude and latitude webmaster, it is ensured that longitude and latitude webmaster
It is close on the surface of inner layer film, wherein, the radical of the meridional fibers silk of longitude and latitude webmaster is 5~50, latitude
Line fiber silk is that the spacing of parallel fiber silk is 20~3000 microns using 1 winding；Graticules tube thickness
For 3~20 microns；
C, the outer layer coating last layer outer membrane in inner layer film laminating longitude and latitude webmaster；The outer layer film forming of outer membrane
Material is identical with internal layer film forming material；It is also 20~50% internal layer film forming polymers, 30~60% by mass percentage
Internal layer film forming diluent, 0.5~5% internal layer are into membrane permeablizer, 5~30% internal layer film forming pore-creating agents, 5~30%
Internal layer film for additive is well mixed, and outer layer film forming material is made by thermally induced phase separation；Then double spiral shells are passed through
Bar extrusion shaping machine is heated to 130-390 DEG C of melting mixing uniformly, extrusion coated through tubular membrane outer layer coating head
One layer of thin outer membrane；The inner layer film of the tubular membrane is melted by the mesh of longitude and latitude webmaster with outer membrane and pasted
Jail, the thickness of outer membrane is 25~100 microns, obtains internal pressure tubular multilayer composite separation membrane semi-finished product；
D, obtained internal pressure tubular multilayer composite separation membrane semi-finished product through ethanol or isopropyl alcohol extraction are obtained into interior pressure-pipe type
Multilayer complex films finished product.
Applied in addition, one layer of NF membrane can be coated in the inner surface of interior pressure-pipe type multilayer complex films finished product as needed
Layer, is made inner pressed nanofiltration tubular membrane, filtering accuracy is higher.In made from the manufacture method of the present invention
Pressure-pipe type multilayer complex films, as its external diameter≤3mm, can be used as hollow-fibre membrane.
With reference to specific embodiment, the present invention is described in detail, and the example of the embodiment is intended to be used for
The present invention is explained, and is not considered as limiting the invention.Unreceipted particular technique or condition in embodiment
, it can be carried out according to the technology described by document in the art or condition or according to product description.It is used
Reagent or the unreceipted production firm person of instrument, being can be by the conventional products of acquisition purchased in market.
Table 1：Each composition consumption (unit in embodiment：Kilogram)
Embodiment 1
Raw material：It is shown in Table 1
Preparation method：
A, internal layer film forming material is made by thermally induced phase separation by each composition in table 1 is well mixed, by double
Screw extrusion molding machine is heated to 150 DEG C of melting mixings uniformly, is cooled to after being extruded through tubular membrane inner membrance die orifice
The inner layer film of tubular membrane；
B and then the internal layer being close to outside the inner layer film of tubular membrane using circular loom establishment longitude and latitude webmaster
On the surface of film, the radical of the meridional fibers silk of its longitude and latitude webmaster is 5, and parallel fiber silk is twined using 1
Around spacing is 20 microns；Then, tubular membrane inner layer film fit longitude and latitude webmaster outer layer coating last layer and
Inner layer film filmogen is the same, obtains outer layer into mould material using thermally induced phase separation, is then squeezed by twin-screw
Go out forming machine and heat that 200 DEG C of melting mixings are uniform, through extrusion coated one layer thin outer of tubular membrane outer layer coating head
Tunic, makes inner layer film and mesh melting patch jail of the outer membrane by longitude and latitude webmaster of tubular membrane, obtains interior pressure pipe
Formula multilayer complex films semi-finished product；
D, most obtain internal pressure tubular multilayer composite separation membrane finished product through ethanol or isopropyl alcohol extraction afterwards.
The external diameter of internal pressure tubular multilayer composite separation membrane finished product made from the present embodiment 1 is 7mm, internal diameter 6.7mm, hole
Gap rate is 65%, and UF membrane aperture is 0.05 micron, under 0.1MPa, 25 DEG C of test condition, and pure water leads to
Water is 1200L/m2*hr, its resistance to exposure pressure >=0.8MPa.
Embodiment 2
Raw material：It is shown in Table 1.
Preparation method：The preparation method of embodiment 2 is same as Example 1, it is different be only in step a and
The temperature that twin-screw extrusion forming machine is heated in step b is 130 DEG C；The meridional fibers of longitude and latitude webmaster in step b
The radical of silk is 15, and parallel fiber silk is that spacing is 100 microns using 1 winding.
The bleeding agent that the present embodiment 2 is used is penetrating agent JFC.
The external diameter 7mm of internal pressure tubular multilayer composite separation membrane made from the present embodiment 2, internal diameter 6.5mm, porosity is
55%, UF membrane aperture is 0.03 micron, and under 0.1MPa, 25 DEG C of test condition, pure water water-flowing amount is
950L/m2*hr, its resistance to exposure pressure >=1.0MPa.
Embodiment 3
Raw material：It is shown in Table 1.
Preparation method：The preparation method of embodiment 3 is same as Example 1, it is different be only in step a and
The temperature that twin-screw extrusion forming machine is heated in step b is 390 DEG C；The meridional fibers of longitude and latitude webmaster in step b
The radical of silk is 30, and parallel fiber silk is that spacing is 120 microns using 1 winding.
The external diameter 7mm of internal pressure tubular multilayer composite separation membrane made from the present embodiment 3, internal diameter 6.5mm, porosity is
62%, UF membrane aperture is 0.04 micron, and under 0.1MPa, 25 DEG C of test condition, pure water water-flowing amount is
1050L/m2*hr, its resistance to exposure pressure >=0.9MPa.
Embodiment 4
Raw material：It is shown in Table 1.
Preparation method：The preparation method of embodiment 4 is same as Example 1, and different is only in step a
The temperature of twin-screw extrusion forming machine heating is 180 DEG C；The temperature that twin-screw extrusion forming machine is heated in step b
For 300 DEG C；The radical of the meridional fibers silk of longitude and latitude webmaster is 25, and parallel fiber silk is wound using 1,
Spacing is 1000 microns.
The bleeding agent that the present embodiment 4 is used is penetrant t.
The external diameter 7mm of internal pressure tubular multilayer composite separation membrane made from the present embodiment 4, internal diameter 6.5mm, porosity is
60%, UF membrane aperture is 0.04 micron, and under 0.1MPa, 25 DEG C of test condition, pure water water-flowing amount is
1030L/m2*hr, its resistance to exposure pressure >=0.8MPa.
Embodiment 5
Raw material：It is shown in Table 1.
Preparation method：The preparation method of embodiment 5 is same as Example 1, and different is only in step a
The temperature of twin-screw extrusion forming machine heating is 280 DEG C；The temperature that twin-screw extrusion forming machine is heated in step b
For 190 DEG C；The radical of the meridional fibers silk of longitude and latitude webmaster is 50, and parallel fiber silk is wound using 1,
Spacing is 800 microns.
The external diameter 7mm of internal pressure tubular multilayer composite separation membrane obtained by the present embodiment, internal diameter 6.5mm, porosity is
63%, UF membrane aperture is 0.05 micron, and under 0.1MPa, 25 DEG C of test condition, pure water water-flowing amount is
1100L/m2*hr, its resistance to exposure pressure >=0.8MPa.
Embodiment 6
Raw material：It is shown in Table 1.
Preparation method：The preparation method of embodiment 5 is same as Example 1, it is different be only in step a and
The temperature that twin-screw extrusion forming machine is heated in step b is 260 DEG C；The meridional fibers of longitude and latitude webmaster in step b
The radical of silk is 36, and parallel fiber silk is that spacing is 3000 microns using 1 winding.
The external diameter 7mm of internal pressure tubular multilayer composite separation membrane obtained by the present embodiment, internal diameter 6.5mm, porosity is
65%, UF membrane aperture is 0.05 micron, and under 0.1MPa, 25 DEG C of test condition, pure water water-flowing amount is
1080L/m2*hr, its resistance to exposure pressure >=0.9MPa.
Above-mentioned embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this
Change that those skilled in the art are made in the range of technical scheme, remodeling, addition or
Replace, also belong to protection scope of the present invention.
Claims (10)
1. a kind of manufacture method of internal pressure tubular multilayer composite separation membrane, it is characterised in that under its manufacture method is divided into
State step：
A, by mass percentage by 20~50% internal layer film forming polymers, 30~60% internal layer film forming diluents,
0.5~5% internal layer is mixed into membrane permeablizer, 5~30% internal layer film forming pore-creating agents, 5~30% internal layer film for additive
Close uniform, internal layer film forming material is made by thermally induced phase separation, obtained internal layer film forming material is passed through into twin-screw
Extrusion shaping machine is heated to 130-390 DEG C of melting mixing uniformly, is cooled to after being extruded through tubular membrane inner membrance die orifice
The inner layer film of tubular membrane；
B, made from step a outside inner layer film using circular loom work out longitude and latitude webmaster, the longitude and latitude webmaster
It is close on the surface of inner layer film；
C, the outer layer coating last layer outer membrane in inner layer film laminating longitude and latitude webmaster；The outer layer of the outer membrane
Film forming material is identical with internal layer film forming material；The outer layer film forming material is heated to 130- by twin-screw extrusion forming machine
390 DEG C of melting mixings are uniform, through the extrusion coated one layer of thin outer membrane of tubular membrane outer layer coating head；The pipe
The inner layer film of formula film and mesh melting patch jail of the outer membrane by longitude and latitude webmaster, obtain interior pressure-pipe type MULTILAYER COMPOSITE
Film semi-finished product；
D, obtained internal pressure tubular multilayer composite separation membrane semi-finished product through ethanol or isopropyl alcohol extraction are obtained into interior pressure-pipe type
Multilayer complex films finished product.
2. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The inner surface of the internal pressure tubular multilayer composite separation membrane finished product coats one layer of nanofiltration membrane coat, and inner pressed nanofiltration is made
Tubular membrane.
3. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The internal layer film forming polymer be polyethylene, polypropylene, polyether sulfone, polysulfones, polyvinyl chloride, polyamide,
One or more kinds of combinations in Kynoar, polyurethane, makrolon.
4. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The internal layer film forming diluent be polyethylene, polypropylene, polyether sulfone, polysulfones, polyvinyl chloride, polyamide,
Kynoar, polyurethane, makrolon one or more kinds of mixed diluent therein.
5. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The internal layer into membrane permeablizer be penetrating agent JFC or penetrant t.
6. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The film for additive be lithium chloride, calcium chloride, polyethylene glycol, PVP, tween-
80th, polysiloxanes, silica, titanium dioxide one or more kinds of combination therein.
7. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
150~1000 microns of the thickness of pipe wall of the inner layer film；The thickness of the outer membrane is 25~100 microns.
8. the manufacture method of internal pressure tubular multilayer composite separation membrane according to claim 1, it is characterised in that：
The radical of the meridional fibers silk of the longitude and latitude webmaster is 5~50, and parallel fiber silk is using 1 winding, latitude
The spacing of line fiber silk is 20~3000 microns, and the thickness of longitude and latitude webmaster is 3~20 microns.
9. a kind of internal pressure tubular multilayer composite separation membrane, it is characterised in that：The internal pressure tubular multilayer composite separation membrane is adopted
It is made of the method for claim 1 or 2.
10. internal pressure tubular multilayer composite separation membrane according to claim 9, it is characterised in that：The internal pressure
During external diameter≤3mm of tubular multilayer composite separation membrane, it can be used as hollow-fibre membrane.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108355499A (en) * | 2018-03-23 | 2018-08-03 | 海南立昇净水科技实业有限公司 | Double separating layer hollow fiber ultrafiltration membranes of the net containing tubular support and preparation method thereof |
| CN108854581A (en) * | 2018-03-28 | 2018-11-23 | 湖北瑞滤膜科技有限公司 | A kind of preparation method of high-strength composite tubular type film |
| CN109301133A (en) * | 2018-10-05 | 2019-02-01 | 中山大学 | A kind of diaphragm preparation method for high security, lithium ion battery with high energy density |
| CN110975642A (en) * | 2019-12-31 | 2020-04-10 | 江苏美能膜材料科技有限公司 | High-strength hollow fiber membrane for filtering beverage and wine, membrane component and preparation process of membrane |
| CN115532323A (en) * | 2021-06-29 | 2022-12-30 | 中科南京绿色制造产业创新研究院 | Heterogeneous tubular anion exchange membrane and preparation method and application thereof |
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| CN109301133A (en) * | 2018-10-05 | 2019-02-01 | 中山大学 | A kind of diaphragm preparation method for high security, lithium ion battery with high energy density |
| CN110975642A (en) * | 2019-12-31 | 2020-04-10 | 江苏美能膜材料科技有限公司 | High-strength hollow fiber membrane for filtering beverage and wine, membrane component and preparation process of membrane |
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