CN1101252C - Process for preparing nuclear-tracking polypropylene membrane - Google Patents
Process for preparing nuclear-tracking polypropylene membrane Download PDFInfo
- Publication number
- CN1101252C CN1101252C CN99126358A CN99126358A CN1101252C CN 1101252 C CN1101252 C CN 1101252C CN 99126358 A CN99126358 A CN 99126358A CN 99126358 A CN99126358 A CN 99126358A CN 1101252 C CN1101252 C CN 1101252C
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- film
- polypropylene
- nuclear track
- nuclear
- plastic sheeting
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Abstract
The present invention relates to a manufacturing method of a nuclear track film of polypropylene. Firstly, a transparent plastic film of polypropylene is adopted as raw materials, the plastic film is irradiated by fission fragments of a nuclear reactor, or the plastic film is irradiated by heavy ion generated by a high-energy ion accelerator. The plastic film of polypropylene is irradiated by ultraviolet ray, and at last, the plastic film is etched by a chemical agent and is washed and aired to form the nuclear track film of polypropylene of the present invention. The method has good economic benefit, the device for making the nuclear track film of polypropylene is correspondingly simple, scale production can be easily realized, and the yield is high.
Description
The present invention relates to a kind of manufacture method of polypropylene nuclear track film, the integrated technology that particularly relates to nuclear technology, material technology and chemical technology is made the method for polypropylene nuclear track film.
The nuclear track film claims nucleopore membranes again, is a kind of microporous barrier with special microcellular structure.Mainly be used in the extraordinary microporous barrier of secondary filter, rigorous analysis etc.Make the nuclear track film in the past and mainly be to use the polyester plastics film, but the polyester plastics film can not use in alkaline medium.The present invention makes the nuclear track film with the polypropylene plastic film of energy alkali corrosion resistance, has enlarged the scope of application of nuclear track film.
The production of nuclear track film at present all is to adopt the polyester plastics film, behind irradiation, uses alkaline etching, obtains the nuclear track film after the cleaning, this technical maturity and can produce the nuclear track film in enormous quantities.But because polyester plastics alkali corrosion resistance not, thereby the polyester core track membranes can not be used for alkaline medium, limited the scope of application of nuclear track film.Polypropylene plastics has extraordinary chemical stability, can acid and alkali resistance and the corrosion of wet goods medium, and the price of polypropylene screen is significantly less than polyester film, and use polypropylene screen to produce the nuclear track film is the direction that scientists is made great efforts always.But the etching of polypropylene nuclear track film is a difficult problem always.
The objective of the invention is to propose a kind of manufacture method of polypropylene nuclear track film, use strong oxidizer to be dissolved in the new technology of concentrated sulfuric acid solution as etchant, make and produce polypropylene nuclear track film, solved the production difficult problem of polypropylene nuclear track film, and made technical process realize low-coat scale production easily.
The manufacture method of the polypropylene nuclear track film that the present invention proposes comprises following each step:
1. selecting thickness for use is that the transparent polypropylene plastic sheeting of 12-25 micron is raw material, and the neutron bombardment uranium-235 that utilizes nuclear reactor to produce makes it emit fission fragment, the irradiated plastics film, and reactor capability is 100-1000 kilowatt, exposure time is 10-300 second.Perhaps, the heavy ion irradiation plastic sheeting that utilizes the energetic ion accelerator to produce, exposure time is 5-200 second;
2. utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, ultraviolet lamp power is 50-1000 watt, and the distance of lamp and film is 10-30cm, and irradiation time is 5-60 second;
3. with chemical reagent plastic sheeting is carried out etching then, etchant is K
2Cr
2O
7Or KMnO
4, the etchant solid is dissolved in the H that concentration is 6-16N
2SO
4Solution makes K
2Cr
2O
7Or KMnO
4Concentration is every liter of 10-100 gram, and etching period is 5-20 minute, and etch temperature is 50-90 ℃, according to the aperture of required nuclear track film, and the control etching period;
4. last washing is dried, and forming the aperture is the nuclear track film of 0.1-10 micron, is polypropylene nuclear track film of the present invention.
In the method for the present invention, used polyacrylic film is a kind of very common product, and used chemical reagent is very common potassium bichromate, potassium permanganate and the concentrated sulfuric acid.Utilize polyacrylic film to make the nuclear track film, have good economic benefit.Key of the present invention is to have found to be suitable for the etched etch process of polypropylene screen.The equipment that the present invention makes polypropylene nuclear track film is simple relatively, is easy to realize large-scale production, the yield rate height.
Introduce embodiments of the invention below.
Embodiment 1: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 12 μ m is raw material, utilize nuclear reactor to produce neutron exposure uranium-235, reactor capability is 300 kilowatts, utilizes uranium-235 fission fragment irradiation, exposure time is 100 seconds, and making the nuclear track hole density on the film is 10
6/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 500 watts, and the distance of lamp and film is 30cm, and irradiation time is 30 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is K
2Cr
2O
7Be dissolved in H
2SO
4Solution (concentration 14N), K
2Cr
2O
7Concentration is every liter of 60 gram.Etching period is 10 minutes, and etch temperature is 70 degrees centigrade, obtains the aperture and be 3 microns polypropylene nuclear track microporous membrane.
Embodiment 2: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 15 μ m is raw material, utilize nuclear reactor to produce neutron exposure uranium-235, reactor capability is 800 kilowatts, utilizes uranium-235 fission fragment irradiation, exposure time 250 seconds, making the nuclear track hole density on the film is 10
7/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 100 watts, and the distance of lamp and film is 10cm, and irradiation time is 60 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is KMnO
4Be dissolved in H
2SO
4Solution (concentration 8N), KMnO
4Concentration is every liter of 30 gram.Etching period is 15 minutes, and etch temperature is 50 degrees centigrade, obtains the aperture and be 1 micron polypropylene nuclear track microporous membrane.
Embodiment 3: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 12 μ m is raw material, utilize nuclear reactor to produce neutron exposure uranium-235, reactor capability is 100 kilowatts, utilizes uranium-235 fission fragment irradiation, exposure time 300 seconds, making the nuclear track hole density on the film is 10
6/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 800 watts, and the distance of lamp and film is 30cm, and irradiation time is 5 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is K
2Cr
2O
7Be dissolved in H
2SO
4Solution (concentration 10N), K
2Cr
2O
7Concentration is every liter of 20 gram.Etching period is 20 minutes, and etch temperature is 80 degrees centigrade, obtains the aperture and be 3 microns polypropylene nuclear track microporous membrane.
Embodiment 4: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 15 μ m is raw material, utilize nuclear reactor to produce neutron exposure uranium-235,1000 kilowatts of reactor capabilities are utilized uranium-235 fission fragment irradiation, exposure time is 20 seconds, and making hole, the nuclear track hole density on the film is 10
6/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 50 watts, and the distance of lamp and film is 10cm, and irradiation time is 60 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is KMnO
4Be dissolved in H
2SO
4Solution (concentration 6N), KMnO
4Concentration is every liter of 10 gram.Etching period is 20 minutes, and etch temperature is 90 degrees centigrade, obtains the aperture and be 5 microns polypropylene nuclear track microporous membrane.
Embodiment 5: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 12 μ m is raw material, and the heavy ion that utilizes the energetic ion accelerator to produce comes the irradiated plastics film, and exposure time is 10 seconds, and making the nuclear track hole density on the film is 10
6/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 900 watts, and the distance of lamp and film is 20cm, and irradiation time is 60 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is K
2Cr
2O
7Be dissolved in H
2SO
4Solution (concentration 16N), K
2Cr
2O
7Concentration is every liter of 85 gram.Etching period is 10 minutes, and etch temperature is 85 degrees centigrade, obtains the aperture and be 10 microns polypropylene nuclear track microporous membrane.
Embodiment 6: selecting thickness for use is that the transparent polypropylene PP plastic sheeting of 15 μ m is raw material, and the heavy ion that utilizes the energetic ion accelerator to produce comes the irradiated plastics film, and exposure time is 180 seconds, and making the nuclear track hole density on the film is 10
7/ cm
2Utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, requiring ultraviolet lamp power is 500 watts, and the distance of lamp and film is 10cm, and irradiation time is 30 seconds.With chemical reagent plastic sheeting is carried out etching then, etchant is KMnO
4Be dissolved in H
2SO
4Solution (concentration 9N), KMnO
4Concentration is every liter of 50 gram.Etching period is 15 minutes, and etch temperature is 50 degrees centigrade, obtains the aperture and be 2 microns polypropylene nuclear track microporous membrane.
Claims (1)
1, a kind of manufacture method of polypropylene nuclear track film is characterized in that, this method comprises following each step:
(1) selecting thickness for use is that the transparent polypropylene plastic sheeting of 12-25 micron is raw material, the neutron bombardment uranium-235 that utilizes nuclear reactor to produce makes it emit fission fragment, the irradiated plastics film, reactor capability is 100-1000 kilowatt, exposure time is 10-300 second, perhaps, the heavy ion irradiation plastic sheeting that utilizes the energetic ion accelerator to produce, exposure time is 5-200 second;
(2) utilize the above-mentioned polyacrylic film of ultraviolet ray irradiation, ultraviolet lamp power is 50-1000 watt, and the distance of lamp and film is 10-30cm, and irradiation time is 5-60 second;
(3) with chemical reagent plastic sheeting is carried out etching then, etchant is K
2Cr
2O
7Or KMnO
4, the etchant solid is dissolved in the H that concentration is 6-16N
2SO
4Solution makes K
2Cr
2O
7Or KMnO
4Concentration is every liter of 10-100 gram, and etching period is 5-20 minute, and etch temperature is 50-90 ℃, according to the aperture of required nuclear track film, and the control etching period;
(4) washing is dried at last, and forming the aperture is the nuclear track film of 0.1-10 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99126358A CN1101252C (en) | 1999-12-17 | 1999-12-17 | Process for preparing nuclear-tracking polypropylene membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99126358A CN1101252C (en) | 1999-12-17 | 1999-12-17 | Process for preparing nuclear-tracking polypropylene membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1254615A CN1254615A (en) | 2000-05-31 |
| CN1101252C true CN1101252C (en) | 2003-02-12 |
Family
ID=5284416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99126358A Expired - Fee Related CN1101252C (en) | 1999-12-17 | 1999-12-17 | Process for preparing nuclear-tracking polypropylene membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1101252C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102908902B (en) * | 2012-07-04 | 2015-06-03 | 上海赫顺医疗科技有限公司 | Technique for producing nucleopore membranes by miniature particle accelerator |
| CN103521087B (en) * | 2013-10-25 | 2016-01-13 | 北京南洋慧通新技术有限公司 | A kind of irradiance method of heavy ion microporous filter membrane |
| CN103587173B (en) * | 2013-11-08 | 2016-03-02 | 陈武 | The preparation method of a kind of nucleopore membranes yarn, nucleopore membranes screen window and nucleopore membranes yarn |
| CN108144559B (en) * | 2018-02-24 | 2019-11-22 | 清华大学 | A kind of catalytic film reactor and preparation method thereof based on nuclear track membrane |
| CN114377567A (en) * | 2021-12-29 | 2022-04-22 | 先进能源科学与技术广东省实验室 | Preparation method of sub-nanometer porous PES (polyether sulfone) membrane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411971A (en) * | 1977-06-30 | 1979-01-29 | Japan Atom Energy Res Inst | Production of porous film of polyvinylidene fluoride |
| SU1763452A1 (en) * | 1990-08-27 | 1992-09-23 | Объединенный Институт Ядерных Исследований | Method for preparation of polypropylene microfiltering membrane |
| CN1070202A (en) * | 1991-07-09 | 1993-03-24 | 施赛马特有限公司 | the polymeric film |
-
1999
- 1999-12-17 CN CN99126358A patent/CN1101252C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411971A (en) * | 1977-06-30 | 1979-01-29 | Japan Atom Energy Res Inst | Production of porous film of polyvinylidene fluoride |
| SU1763452A1 (en) * | 1990-08-27 | 1992-09-23 | Объединенный Институт Ядерных Исследований | Method for preparation of polypropylene microfiltering membrane |
| CN1070202A (en) * | 1991-07-09 | 1993-03-24 | 施赛马特有限公司 | the polymeric film |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1254615A (en) | 2000-05-31 |
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