CN107297155A - The preparation method of superhigh intensity polypropylene hollow fiber membrane - Google Patents
The preparation method of superhigh intensity polypropylene hollow fiber membrane Download PDFInfo
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- CN107297155A CN107297155A CN201710540624.6A CN201710540624A CN107297155A CN 107297155 A CN107297155 A CN 107297155A CN 201710540624 A CN201710540624 A CN 201710540624A CN 107297155 A CN107297155 A CN 107297155A
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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
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
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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
- B01D67/0002—Organic membrane manufacture
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
- B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
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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
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0083—Thermal after-treatment
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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
- B01D69/08—Hollow fibre membranes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/24—Mechanical properties, e.g. strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
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- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
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- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
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Abstract
The invention discloses a kind of preparation method of superhigh intensity polypropylene hollow fiber membrane.There are different rates of heat transfer to adjust the cooling speed of fiber to control nucleation and the growth of platelet from DINCH using air using the different types of cooling is combined after polypropylene hollow fiber membrane made from melt spinning method by the present invention.Thicker platelet can not only obtain the polypropylene hollow fiber membrane of high intensity, and the aperture formed after the stretch can also be reduced, and small-bore correspond to higher separation accuracy.Amorphous layer is due to that can not stretch pore-forming, and the flux of film can greatly be reduced by being present in film, therefore the amorphous layer on surface can be partly dissolved to solve flux reduction problem by DINCH dissolution.The method filming technology is simple, and the polypropylene hollow fiber of preparation has superhigh intensity.The film alternative band inner lining film after hydrophilic modifying.
Description
Technical field
The present invention relates to technical field of polymer materials, especially a kind of preparation of superhigh intensity polypropylene hollow fiber membrane
Method.
Background technology
It, using polymeric membrane as representative, and is emerging many in one grown up in recent decades that membrane separation technique, which is,
The high new technique of subject crossing, have the advantages that easy to operate, equipment is simple, environmental protection and be widely used in oil
The fields such as chemical industry, electron electric power, food processing, sewage disposal, desalinization, biological medicine.With expanding economy, exploitation one
Good, the cheap film of high intensity, high flux, stability is planted, is the developing direction of technical field of membrane.Polypropylene be using propylene as
The semicrystalline thermoplastics of monomer polymerization, are one of three big general-purpose plastics.Polypropylene has corrosion resistance and nontoxicity, and
It is cheap, it is a kind of excellent membrane material.Therefore held in both hands in film field by the heat of numerous scholars.Although plain polypropylene is hollow
Fiber film strength can meet the demand of major applications, but still also have needs more in actual applications in many cases
The film silk of high intensity.
Main problems faced has that film-strength is inadequate, flux is relatively low, anti-fouling performance to hollow-fibre membrane in actual applications
Difference etc..It is common fault that numerous species hollow-fibre membrane has that wherein film-strength is low, and film is caused due to the low intensity of raw material
Low intensity.For same membrane material, the difference of the preparation technology of use, film strength is also to vary.Strengthen film at present
The method of material mainly have be improved from raw material, process adjustments and lined.It is then in advance to membrane material that raw material, which are improved,
Material is strengthened, and spins film forming afterwards, and this method can improve film-strength to a certain extent, but the pore structure of film, porosity
Etc. that may be affected, while process is numerous and diverse.Process adjustments are then in spinning technique, to be controlled using some special methods
The process of film is made, changes its structure, it is carried out self-reinforcing from structure.For lined, most successful example this
It is PVDF inner lining films.This method is that pressure is undertaken using liner, and a tunic of surface coating is filtered.But in reality
In the application on border, liner is easy to depart from film.For polypropylene hollow fiber membrane, polypropylene has certain intensity,
Thus polypropylene hollow fiber membrane is also with some strength.But in actual application, still have needs in many cases
Want the film silk that intensity is higher.Superhigh intensity polypropylene hollow fiber membrane then can be with these extreme service conditions.
The content of the invention
It is an object of the present invention to provide a kind of preparation method of superhigh intensity polypropylene hollow fiber membrane, it can be surpassed
The polypropylene hollow fiber of high intensity, and production method is simple, and the Stability Analysis of Structures of product is also not in follow-up in use
The problem of.
What the present invention was realized in：The preparation method of superhigh intensity polypropylene hollow fiber membrane, comprises the following steps：
1) spinning of polypropylene hollow fiber：Polypropylene hollow fiber is prepared using melt spinning method, by wire drawing level isotactic
Polypropylene carries out melting extrusion spinning through spinning-drawing machine, and spinning temperature is 170-230 DEG C；With nitrogen as coelosis fluid, flow velocity is
0.01-0.1L/min；Cooling procedure first uses short distance air cooling, and air themperature is 5-30 DEG C), air cooling length is 0.5-3m, after
Cooled down again using solvent, solvent temperature is 5-60 DEG C)；Winding speed in doughnut, spinning process is wound into after cooling is
140-420m/min, the formation of polypropylene platelet is controlled by adjusting film silk cooling speed, obtains having 0.5 micron of sheet crystalline substance
The polypropylene hollow fiber of structure；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first using absolute ethyl alcohol it is clear
After wash clean, then with soaked in absolute ethyl alcohol 24h the solvent that remains in film silk is set to be sufficiently disengaged from polypropylene hollow fiber；Take out hollow
After fiber dries naturally, lamellar structure is improved through 100-150 DEG C of heat treatment 20-80min；Eventually pass the stretching of stretching-machine cold-hot
Pore obtains superhigh intensity polypropylene hollow fiber membrane, and cold and hot draw ratio is respectively 10-40% and 60-290%, and hot-drawn temperature is
95-140 DEG C, and it is incubated 30-80min.
Described polypropylene is wire drawing level HOPP, or the high fondant-strength HOPP containing side chain, and it melts
Melt index between 0.3-4g/10min.
The solvent of described solvent cooling is hexamethylene 1,2- dioctyl phthalate diisononyl esters.
Compared with prior art, the present invention is different using being combined after polypropylene hollow fiber membrane made from melt spinning method
The type of cooling, using air and DINCH there are different rates of heat transfer to adjust the cooling speed of fibers control platelet into
Core is with increasing.Thicker platelet can not only obtain the polypropylene hollow fiber membrane of high intensity, and the hole formed after the stretch
Footpath can also be reduced, and small-bore correspond to higher separation accuracy.Simultaneously because DINCH is non-polar solven, therefore to polypropylene
There is certain dissolution, this just can be molten by the amorphous layer for causing the quick freezing of strand to be formed because of quick cooling
Solution.Amorphous layer is due to that can not stretch pore-forming, and the flux of film can greatly be reduced by being present in film, therefore DINCH dissolution
The amorphous layer on surface can be partly dissolved to solve flux reduction problem.The method filming technology is simple, the polypropylene of preparation
Doughnut has superhigh intensity.The film alternative band inner lining film after hydrophilic modifying.Extensively, cost is low for material source of the present invention
Honest and clean, using effect is good.
Brief description of the drawings
Fig. 1 schemes for the inner face SEM of the product of the present invention；
Fig. 2 schemes for the outside SEM of the product of the present invention；
Fig. 3 is product of the invention and plain polypropylene hollow-fibre membrane stress-strain curve.
Embodiment
Embodiments of the invention 1：The preparation method of superhigh intensity polypropylene hollow fiber membrane, comprises the following steps：
1) spinning of polypropylene hollow fiber：By wire drawing level HOPP through spinning-drawing machine carry out spinning, spinning-drawing machine from feed
Material mouth is to each section of temperature control of head：170℃、180℃、190 ℃、200℃、200℃、200℃、200℃；Made with nitrogen
For coelosis fluid, flow velocity is 0.06L/min；Cooling procedure first uses short distance air cooling, and air themperature is 20 DEG C, air cooling length
For 1m, after cooled down again using solvent, solvent cooling uses nonpolar hexamethylene 1, and 2- dioctyl phthalate diisononyl esters are molten as cooling down
Agent, solvent temperature is 15 DEG C；It is 350m/min that winding speed in doughnut, spinning process is wound into after cooling, is had
The polypropylene hollow fiber of 0.5 micron of sheet crystal structure；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first using absolute ethyl alcohol it is clear
After wash clean, then with soaked in absolute ethyl alcohol 24h the DINCH that remains in film silk is set to be sufficiently disengaged from polypropylene hollow fiber；In taking-up
After hollow fiber dries naturally, lamellar structure is improved through 140 DEG C of heat treatment 60min；Eventually pass the stretching pore of stretching-machine cold-hot
Superhigh intensity polypropylene hollow fiber membrane is obtained, cold and hot draw ratio is respectively 20% and 180%, and temperature is 95 DEG C of beginning hot-drawns,
60min is incubated after to 120 DEG C.Tensile break strength, pure water flux and rejection are shown in Table 1.
Embodiments of the invention 2：The preparation method of superhigh intensity polypropylene hollow fiber membrane, comprises the following steps：
1) spinning of polypropylene hollow fiber：By high fondant-strength HOPP (melt index is 0.35g/10min)
Spinning is carried out through spinning-drawing machine, spinning-drawing machine each section of temperature control from spout to head is：170℃、180℃、190℃、200℃、
200℃、200℃、200℃、 190℃；With nitrogen as coelosis fluid, flow velocity is 0.06L/min；Cooling procedure is first using short
Apart from air cooling, air themperature is 20 DEG C, and air cooling length is 1.5m, after cooled down again using solvent, solvent cooling uses nonpolar ring
Hexane 1,2- dioctyl phthalate diisononyl esters are as cooling solvent, and solvent temperature is 15 DEG C；Doughnut, spinning are wound into after cooling
During winding speed be 350m/min, obtain the polypropylene hollow fiber with 0.5 micron of sheet crystal structure；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first use the anhydrous second of alcohol
After alcohol is cleaned up, then the DINCH that remains is sufficiently disengaged from hollow polypropylene fine
Dimension；After taking-up doughnut dries naturally, lamellar structure is improved through 140 DEG C of heat treatment 60min；Eventually pass stretching-machine cold-hot
Stretching pore obtains superhigh intensity polypropylene hollow fiber membrane, and cold and hot draw ratio is respectively 20% and 180%, and temperature is 95 DEG C
Start hot-drawn, to 120 DEG C after be incubated 60min.Tensile break strength, pure water flux and rejection are shown in Table 1.
Embodiments of the invention 3：The preparation method of superhigh intensity polypropylene hollow fiber membrane, comprises the following steps：
1) spinning of polypropylene hollow fiber：By high fondant-strength HOPP (melt index is 0.3g/10min) warp
Spinning-drawing machine carries out spinning, and spinning-drawing machine each section of temperature control from spout to head is：170℃、180℃、190℃、200℃、200
℃、200℃、200℃、 190℃；With nitrogen as coelosis fluid, flow velocity is 0.06L/min；Cooling procedure first uses short distance
Air cooling, air themperature be 20 DEG C, air cooling length be 2m, after again using solvent cool down, solvent cooling use nonpolar hexamethylene 1,
2- dioctyl phthalate diisononyl esters are as cooling solvent, and solvent temperature is 15 DEG C；It is wound into after cooling in doughnut, spinning process
Winding speed is 350m/min, obtains the polypropylene hollow fiber with 0.5 micron of sheet crystal structure；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first using absolute ethyl alcohol it is clear
After wash clean, then with soaked in absolute ethyl alcohol 24h the DINCH that remains in film silk is set to be sufficiently disengaged from polypropylene hollow fiber；In taking-up
After hollow fiber dries naturally, lamellar structure is improved through 140 DEG C of heat treatment 60min；Eventually pass the stretching pore of stretching-machine cold-hot
Superhigh intensity polypropylene hollow fiber membrane is obtained, cold and hot draw ratio is respectively 20% and 180%, and temperature is 95 DEG C of beginning hot-drawns,
60min is incubated after to 120 DEG C.Tensile break strength, pure water flux and rejection are shown in Table 1.
Embodiments of the invention 4：The preparation method of superhigh intensity polypropylene hollow fiber membrane, comprises the following steps：
1) spinning of polypropylene hollow fiber：By high fondant-strength HOPP (melt index is 0.4g/10min) warp
Spinning-drawing machine carries out spinning, and spinning-drawing machine each section of temperature control from spout to head is：170℃、180℃、190℃、200℃、200
℃、200℃、200℃、 190℃；With nitrogen as coelosis fluid, flow velocity is 0.06L/min；Cooling procedure first uses short distance
Air cooling, air themperature be 20 DEG C, air cooling length be 2.5m, after again using solvent cool down, solvent cooling use nonpolar hexamethylene
1,2- dioctyl phthalate diisononyl esters are as cooling solvent, and solvent temperature is 15 DEG C；Doughnut, spinning process are wound into after cooling
Middle winding speed is 350m/min, obtains the polypropylene hollow fiber with 0.5 micron of sheet crystal structure；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first using absolute ethyl alcohol it is clear
After wash clean, then with soaked in absolute ethyl alcohol 24h the DINCH that remains in film silk is set to be sufficiently disengaged from polypropylene hollow fiber；In taking-up
After hollow fiber dries naturally, lamellar structure is improved through 140 DEG C of heat treatment 60min；Eventually pass the stretching pore of stretching-machine cold-hot
Superhigh intensity polypropylene hollow fiber membrane is obtained, cold and hot draw ratio is respectively 20% and 180%, and temperature is 95 DEG C of beginning hot-drawns,
60min is incubated after to 120 DEG C.Tensile break strength, pure water flux and rejection are shown in Table 1.
The tensile break strength of table 1, pure water flux and rejection data
The polypropylene hollow fiber membrane prepared using this method has the intensity of superelevation, and normal film silk intensity typically exists
60MPa or so, the film-strength prepared using this method can be doubled.And film is also obvious to 0.5% burnt black ink rejection
Improve.Because lamellae thickness increase, the membrane aperture obtained in stretching engineering diminishes.But due to the increase of lamellae thickness,
The reduction of membrane porosity makes the flux of film in a slight decrease.Superhigh intensity polypropylene hollow fiber membrane prepared by this method not only can use
In under hyperbaric environment, while can also meet higher separation accuracy requirement.
Claims (3)
1. a kind of preparation method of superhigh intensity polypropylene hollow fiber membrane, it is characterised in that comprise the following steps：
1) spinning of polypropylene hollow fiber：Polypropylene hollow fiber is prepared using melt spinning method, by polypropylene through spinning-drawing machine
Melting extrusion spinning is carried out, spinning temperature is 170-230 DEG C；With nitrogen as coelosis fluid, flow velocity is 0.01-0.1L/min；
Cooling procedure first uses short distance air cooling, and the temperature of air is 5-30 DEG C, and air cooling length is 0.5-3m, after it is cold using solvent again
But, solvent temperature is 5-60 DEG C；It is 140-420m/min that winding speed in doughnut, spinning process is wound into after cooling, is led to
Overregulate film silk cooling speed to control the formation of polypropylene platelet, obtain in the polypropylene with 0.5 micron of sheet crystal structure
Hollow fiber；
2) preparation of polypropylene hollow fiber membrane：By step 1) made from polypropylene hollow fiber first using washes of absolute alcohol do
After net, then with soaked in absolute ethyl alcohol 24h the solvent remained in film silk is set to be sufficiently disengaged from polypropylene hollow fiber；Take out doughnut
Naturally after drying, lamellar structure is improved through 100-150 DEG C of heat treatment 20-80min；Eventually pass the stretching pore of stretching-machine cold-hot
Superhigh intensity polypropylene hollow fiber membrane is obtained, cold and hot draw ratio is respectively 10-40% and 60-290%, and hot-drawn temperature is 95-
140 DEG C, and it is incubated 30-80min.
2. the preparation method of superhigh intensity polypropylene hollow fiber membrane according to claim 1, it is characterised in that：Described
Polypropylene is wire drawing level HOPP or the high fondant-strength HOPP containing side chain, and its melt index is 0.3-4g/
Between 10min.
3. the preparation method of superhigh intensity polypropylene hollow fiber membrane according to claim 1, it is characterised in that：Described
The solvent of solvent cooling is hexamethylene 1,2- dioctyl phthalate diisononyl esters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710540624.6A CN107297155B (en) | 2017-07-05 | 2017-07-05 | Preparation method of ultrahigh-strength polypropylene hollow fiber membrane |
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| CN201710540624.6A CN107297155B (en) | 2017-07-05 | 2017-07-05 | Preparation method of ultrahigh-strength polypropylene hollow fiber membrane |
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| CN107297155A true CN107297155A (en) | 2017-10-27 |
| CN107297155B CN107297155B (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253712A (en) * | 2022-07-11 | 2022-11-01 | 杭州科百特过滤器材有限公司 | Asymmetric polypropylene hollow fiber membrane for degassing and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053373A (en) * | 1990-01-17 | 1991-07-31 | 浙江大学 | The new preparation process of polypropylene hollow fiber microporous membrane |
| CN103933880A (en) * | 2014-03-24 | 2014-07-23 | 贵州省材料产业技术研究院 | Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane |
| CN104474921A (en) * | 2014-12-04 | 2015-04-01 | 贵州省材料产业技术研究院 | Polyolefin porous membrane with perforated honeycomb pore structure and preparation method thereof |
| CN106422820A (en) * | 2016-08-31 | 2017-02-22 | 江林（贵州）高科发展股份有限公司 | Method for preparing hydrophilic polypropylene hollow fiber film with anti-bacterial function |
| CN106582323A (en) * | 2016-11-29 | 2017-04-26 | 康命源（贵州）科技发展有限公司 | Preparation method of high-strength, high-throughput polyvinylidene fluoride hollow fiber membrane and product thereof |
-
2017
- 2017-07-05 CN CN201710540624.6A patent/CN107297155B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053373A (en) * | 1990-01-17 | 1991-07-31 | 浙江大学 | The new preparation process of polypropylene hollow fiber microporous membrane |
| CN103933880A (en) * | 2014-03-24 | 2014-07-23 | 贵州省材料产业技术研究院 | Preparation method of high-throughput hydrophilic modified polypropylene hollow fiber membrane |
| CN104474921A (en) * | 2014-12-04 | 2015-04-01 | 贵州省材料产业技术研究院 | Polyolefin porous membrane with perforated honeycomb pore structure and preparation method thereof |
| CN106422820A (en) * | 2016-08-31 | 2017-02-22 | 江林（贵州）高科发展股份有限公司 | Method for preparing hydrophilic polypropylene hollow fiber film with anti-bacterial function |
| CN106582323A (en) * | 2016-11-29 | 2017-04-26 | 康命源（贵州）科技发展有限公司 | Preparation method of high-strength, high-throughput polyvinylidene fluoride hollow fiber membrane and product thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253712A (en) * | 2022-07-11 | 2022-11-01 | 杭州科百特过滤器材有限公司 | Asymmetric polypropylene hollow fiber membrane for degassing and preparation method and application thereof |
| CN115253712B (en) * | 2022-07-11 | 2024-06-14 | 杭州科百特过滤器材有限公司 | Asymmetric polypropylene hollow fiber membrane for degassing and preparation method and application thereof |
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| CN107297155B (en) | 2020-08-25 |
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