CN102463040A - Application of porous polypropylene membrane - Google Patents
Application of porous polypropylene membrane Download PDFInfo
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- CN102463040A CN102463040A CN2010105319161A CN201010531916A CN102463040A CN 102463040 A CN102463040 A CN 102463040A CN 2010105319161 A CN2010105319161 A CN 2010105319161A CN 201010531916 A CN201010531916 A CN 201010531916A CN 102463040 A CN102463040 A CN 102463040A
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- porous film
- polypropylene porous
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 42
- -1 polypropylene Polymers 0.000 title claims abstract description 42
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 42
- 239000012528 membrane Substances 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 6
- 239000003791 organic solvent mixture Substances 0.000 claims abstract description 4
- 210000002381 plasma Anatomy 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 239000002352 surface water Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000010842 industrial wastewater Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000001471 micro-filtration Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 11
- 230000004907 flux Effects 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 4
- 229940098773 bovine serum albumin Drugs 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an application of a porous polypropylene membrane as an ultrafiltration or microfiltration separation membrane in separating water, a solution, blood plasma and an organic solvent mixture, wherein the porous polypropylene membrane is a membrane with the beta crystalline content K value being more than 0.8.
Description
Technical field
The application relates to field of polymer technology, and particularly, the application relates to the purposes of polypropylene porous film.
Background technology
Under the situation of world today's shortage of resources, the recycle of water resource has become the focus that the whole world is paid close attention to.Therefore, film separation science and Study on Technology obtain the great attention of various countries, and are widely used in fields such as petrochemical industry, the energy, environment, desalinization, food, biological medicines gradually.Can be divided into according to diffusion barrier aperture difference: reverse osmosis membrane, NF membrane, milipore filter and micro-filtration membrane.Wherein, milipore filter and micro-filtration membrane aperture are relatively large, have flux height, operating pressure is little, operating cost is low advantage, are widely used in the concentrating and the field such as separate of pre-treatment, aseptic filtration, protein of counter-infiltration.
Polypropylene porous film is one of microporous barrier of using the earliest.As far back as the seventies in 20th century, just there is the human drawing process to prepare polypropylene porous film, promptly brilliant through in polypropylene diaphragm, generating β, and stretching makes perforated membrane; Perhaps through in polypropylene diaphragm, sneaking into other macromolecule or inorganic matter, and stretch and also can obtain perforated membrane.But these microporous barrier porositys are low, through performance is poor, can only be as dielectric materials such as capacitor diaphragms.Another kind method is through melt high-speed stretch quenching, obtains the alignment films of low-crystallinity, stretches then and the higher microporous barrier of thermal finalization acquisition porosity, can be used as diffusion barrier and uses.Its shortcoming is a poor mechanical property, and transverse strength is low, and pass structure is bad, and what obtain usually is the slit-type micropore, and the processing technology more complicated, thereby has hindered the extensive use of microporous polypropylene membrane.
Summary of the invention
The application relates to the purposes of polypropylene porous film in ultrafiltration or microfiltering separation film, and wherein beta crystal content K value is more than 0.8.
In certain embodiments, said polypropylene porous film has the micropore that runs through body from the surface.
In certain embodiments, the micropore size of said polypropylene porous film is less than 5 μ m.
In certain embodiments, the porosity of said polypropylene porous film is 20-90%.
In certain embodiments, the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, said polypropylene porous film prepares through stretch processes.
In certain embodiments, said purposes, solution dried up, blood plasma and ORGANIC SOLVENT MIXTURES for dividing.
In certain embodiments, said wet concentration is from running water, underground water, surface water, sanitary sewage and industrial wastewater.
Description of drawings
Fig. 1 is the electron scanning micrograph of the biaxial stretch-formed acquisition microporous membrane structure of polypropylene in the application's one embodiment.
Fig. 2 is ultrafiltration, micro-filtration membrane clastotype sketch map.
The specific embodiment
Only if requirement in addition among the application, in whole specification and appending claims thereof, word " comprises " and " comprising " should be interpreted as meaning open, that include formula, promptly " includes but not limited to ".
" embodiment " in whole specification, mentioned or " embodiment " or " in another embodiment " or " in certain embodiments " mean and at least one embodiment, comprise and this embodiment described relevant concrete key element, structure or characteristic.Therefore, diverse location occurs in whole specification phrase " in one embodiment " or " in embodiments " or " in another embodiment " or " in certain embodiments " needn't all refer to same embodiment.In addition, only if conflict each other, concrete key element, structure or the characteristic of the mentioned a certain embodiment of formation can any suitable mode combine in one or more embodiments.
Should be appreciated that term " or " usually with it comprise " and/or " implication and use, only if among the application in addition clearly the regulation.
The application relates to the purposes of polypropylene porous film in ultrafiltration or microfiltering separation film, and wherein beta crystal content K value is more than 0.8.
In certain embodiments, said polypropylene porous film has the micropore that runs through body from the surface.
In certain embodiments, said polypropylene porous film has the aperture of running through body from the surface micropore less than 5 μ m.
In certain embodiments, to have the porosity that runs through body from the surface be the micropore of 20-90% to said polypropylene porous film.
In certain embodiments, to have the aperture of running through body from the surface be the micropore of 20-90% less than 5 μ m and porosity to said polypropylene porous film.
In certain embodiments, the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, said polypropylene porous film has the micropore that runs through body from the surface, and the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, said polypropylene porous film has the aperture of running through body from the surface micropore less than 5 μ m, and the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, it is the micropore of 20-90% that said polypropylene porous film has the porosity that runs through body from the surface, and the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, it is the micropore of 20-90% less than 5 μ m and porosity that said polypropylene porous film has the aperture of running through body from the surface, and the thickness of said polypropylene porous film is 5-100 μ m.
In certain embodiments, said polypropylene porous film prepares through stretch processes.
The stretch processes that can be used in the application can be the method that on two orthogonal directions, stretches.Stretch simultaneously or twin shaft different biaxial stretch-formed mode such as stretch successively all can obtain the application's perforated membrane with twin shaft.
In certain embodiments, in order to increase the needs of mechanical properties such as longitudinal strength and modulus, the technology that also can adopt twin shaft repeatedly to stretch.
During stretching, axially go up the general identical draw ratio of setting for two, it is well-balanced to help hole shape like this.When twin shaft stretched simultaneously, the strain rate that diaxon makes progress was also got close value.When twin shaft stretched successively, temperature and strain rate when stretching for twice can equate, also can be slightly different.
In certain embodiments, biaxial stretch-formed temperature is 80-140 ℃.
In certain embodiments, biaxial stretch-formed temperature is 90-130 ℃.
In certain embodiments, biaxial stretch-formed area is than being 1.5-20.
In certain embodiments, biaxial stretch-formed area is than being 2-10.
In certain embodiments, unidirectional strain rate values is less than 10min-1.
In certain embodiments, the microporous barrier after biaxial stretch-formed is carried out the planarization that nervous thermal finalization can improve stability of structure and face.Heat setting temperature can be selected between 110 ℃-140 ℃, and the time is 0.5-5 minute.
In certain embodiments; It is the micropore of 20-90% less than 5 μ m and porosity that said polypropylene porous film has the aperture of running through body from the surface; And the thickness of said polypropylene porous film is 5-100 μ m, and said polypropylene porous film prepares through stretch processes.
In certain embodiments, said purposes, solution dried up, blood plasma and ORGANIC SOLVENT MIXTURES for dividing.
In certain embodiments, said wet concentration is from running water, underground water, surface water, sanitary sewage and industrial wastewater.
Polypropylene porous film of the present invention has advantages such as pass structure is reasonable, separative efficiency is high, operating pressure is little, operating cost is low as separation membrane material, is beneficial to large-scale application.
Hereinafter, the application will carry out illustrated in detail so that understand various aspects of the present invention and advantage better through following embodiment.But, should be appreciated that following embodiment is nonrestrictive and only is used to explain certain embodiments of the present invention.
Embodiment
Embodiment 1
The circular film that to get a diameter be 7cm, thickness is 60 μ m, porosity is 48.50%; Place the ultrafiltration cup, add 200mL pure water (electricity is led＜20 μ S/cm), with the pressure precompressed 30min of 0.2MPa; And test pure water flux (operating pressure is 0.1MPa, mixing speed 400rpm, 25 ℃ of temperature).Then, pure water is replaced by 150mL Bovine Serum Albumin in Aqueous Solution (molecular weight is 67KDa, and concentration is 500ppm), carries out the test of flux and rejection under the same conditions.6 samples of parallel testing, the result shows that pure water flux is 33.20GFD, bovine serum albumin(BSA) test flux is 25.06GFD, rejection 94.65%.
Embodiment 2
With diaphragm roll into assembly (length 12 ", diameter 1.8 ", diaphragm thickness is 60 μ m; Porosity is 48.50%), the test of component detection platform, test condition is: operating pressure 0.1MPa; The rate of recovery 15%, 25 ℃ of temperature, 0.2MPa precompressed 30min; Water inlet is respectively pure water (electricity is led＜20 μ S/cm) and Bovine Serum Albumin in Aqueous Solution (molecular weight is 67KDa, and concentration is 500ppm).Test 6 simultaneously, the result shows pure water flux 164.44GPD, and bovine serum albumin(BSA) test flux is 144.92GPD, rejection 94.83%.
Embodiment 3
With diaphragm roll into assembly (length 12 ", diameter 1.8 ", diaphragm thickness is 60 μ m; Porosity is 48.50%), the test of component detection platform, test condition is: operating pressure 0.1MPa; The rate of recovery 15%, 25 ℃ of temperature, 0.2MPa precompressed 30min; Water inlet is surface water (total solid matter 260.5mg/L, suspension 18.3mg/L, COD
Cr20.0mg/L pH 7.6).Test 6 simultaneously, the result shows product water flux 160.37GPD, produces water water quality: silt density index (SDI) (SDI)≤2 meets reverse osmosis unit water inlet condition.
It is above-mentioned that general to describe and the description of the specific embodiment should not be construed as be the restriction that technical characterictic of the present invention is constituted to of the present invention.Those skilled in the art disclose according to the application's; Can be under the prerequisite of inscape of the present invention; To above-mentioned general the description or/and the technical characterictic in the specific embodiment (comprising embodiment) increases, reduces or makes up, formation belongs to other technical scheme of the present invention.
Claims (8)
1. the purposes of polypropylene porous film in ultrafiltration or microfiltering separation film, wherein beta crystal content K value is more than 0.8.
2. purposes as claimed in claim 1, wherein said polypropylene porous film has the micropore that runs through body from the surface.
3. purposes as claimed in claim 2, the micropore size of wherein said polypropylene porous film is less than 5 μ m.
4. like claim 2 or 3 described purposes, the porosity of wherein said polypropylene porous film is 20-90%.
5. like the described purposes of arbitrary claim among the claim 1-4, the thickness of wherein said polypropylene porous film is 5-100 μ m.
6. like the described purposes of arbitrary claim among the claim 1-5, wherein said polypropylene porous film prepares through stretch processes.
7. the described purposes of arbitrary claim among the claim 1-6, wherein said purposes is dried up for dividing, solution, blood plasma and ORGANIC SOLVENT MIXTURES.
8. purposes as claimed in claim 7, wherein said wet concentration is from running water, underground water, surface water, sanitary sewage and industrial wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105319161A CN102463040A (en) | 2010-11-04 | 2010-11-04 | Application of porous polypropylene membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105319161A CN102463040A (en) | 2010-11-04 | 2010-11-04 | Application of porous polypropylene membrane |
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| Publication Number | Publication Date |
|---|---|
| CN102463040A true CN102463040A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105319161A Pending CN102463040A (en) | 2010-11-04 | 2010-11-04 | Application of porous polypropylene membrane |
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| Country | Link |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062357A (en) * | 1990-11-13 | 1992-07-01 | 中国科学院化学研究所 | High penetrability polypropylene microporous barrier and method for making thereof |
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- 2010-11-04 CN CN2010105319161A patent/CN102463040A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062357A (en) * | 1990-11-13 | 1992-07-01 | 中国科学院化学研究所 | High penetrability polypropylene microporous barrier and method for making thereof |
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Owner name: GUIYANG VONTRON TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING VONTRON TECHNOLOGY CO., LTD. Effective date: 20130722 |
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Free format text: CORRECT: ADDRESS; FROM: 102249 CHANGPING, BEIJING TO: 550023 GUIYANG, GUIZHOU PROVINCE |
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Effective date of registration: 20130722 Address after: Office building 550023 Guizhou city of Guiyang province Magicstor Technology Industrial Park, high tech Zone two floor, No. 206 Applicant after: Vontron Technology Co., Ltd. Address before: 102249, 6 South Road, Xichang, ChangPing Railway Station, Beijing, Changping District Applicant before: Beijing Vontron Technology Co., Ltd. |
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Application publication date: 20120523 |