CN109939573A - The hydrophobically modified method of PTFE filter membrane - Google Patents
The hydrophobically modified method of PTFE filter membrane Download PDFInfo
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- CN109939573A CN109939573A CN201711386834.0A CN201711386834A CN109939573A CN 109939573 A CN109939573 A CN 109939573A CN 201711386834 A CN201711386834 A CN 201711386834A CN 109939573 A CN109939573 A CN 109939573A
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Abstract
The present invention relates to a kind of hydrophobically modified methods of PTFE filter membrane.It follows the steps below: the preparation of a, fluorine-containing surfactant mixed liquor: in a solvent by fluorine-containing surfactant dissolution, and being mixed with crosslinking agent and catalyst；B, polytetrafluoroethylene film is padded into fluorine-containing surfactant mixed liquor, then preliminary drying 1~10 minute at 80~150 DEG C bakes 1~10 minute at 110~200 DEG C；The fluorine-containing surfactant is the mixture of perfluor alcohols acrylate compounds, perfluoroalkyl aminated compounds and perfluorocarboxylic acid chromium complex；The crosslinking agent is the mixture of melamine resin, EH and GGF-343；The solvent is the mixture of methanol, isopropanol, acetoneand ethyl acetate.The super-hydrophobic polytetrafluoroethylene film of preparation is invented, it is simple process, at low cost, there is significant economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of ultra-hydrophobic processing method for polytetrafluoroethylthin thin film, this method is by the poly- of biaxial tension preparation
Tetrafluoroethene film pads fluorine-containing surfactant mixed liquor, is baked after preliminary drying, makes it have ultra-hydrophobicity.It can be used for
The fields such as chemical industry, the energy, environmental protection, medical treatment, electronics, space flight, protective clothes.
Background technique
China is maximum developing country in the world, is currently under industrialization period, economic scale is huge.Due to me
State's weight chemical industry, raw material, the production technology and equipments of energy industry are relatively backward, and energy consumption is big, seriously polluted.Statistics
Show national smoke discharge amount in 1998 up to 14,520,000 tons.Ten big air pollution city in the world, China just account for nine.Combustion
Coal power generation factory is consumption coal rich and influential family.
China GB13223-1996 " fossil-fuel power plant atmospheric pollutant emission standard " builds power plant's dust emission standard to new extension
Value is 200-600mg/m3, not only it is much higher than the 50mg/m of developed country3Discharge standard, be also much higher than China's other industry
(such as cement plant and steel plant) 100-150mg/m3Discharge standard.Deepen with the understanding to smoke harm and environment is protected
The requirement of shield improves, also increasingly stringent to the standard of soot emissions.And sack cleaner is exactly the jinx of flue dust, dust pollution,
It is the high-effective dust-removing equipment of control atmosphere pollution.
The polytetrafluoroethylene film of biaxial tension do not absorb water, fusing point high (327 DEG C), use temperature range it is wide (- 200 DEG C~
260 DEG C), have noninflammability and thermal stability, coefficient of friction small, especially there is chemical resistance (to be resistant to many highly corrosives to be situated between
Matter), against weather and anti-electrical property etc., be therefore widely used in the neck such as chemical industry, the energy, environmental protection, medical treatment, electronics, space flight, clothes
Domain.
Due to containing the oily matters such as a certain amount of coal tar in flue dust, for a long time using film surface can be condensed in, drop
The efficiency of low dedusting.Its basic reason is that polytetrafluoroethylene (PTFE) has certain oleophylic performance.
It is used as permeability type biochemical protective clothes package material as polytetrafluoroethylmicroporous microporous membrane, due to biochemical war agents such as mustard gas
Belong to oily material, it is readily permeable to enter material internal, to lose protective capacities, therefore it is also required to a kind of super-hydrophobic polytetrafluoro
Vinyl film.
It is, therefore, desirable to provide a kind of method for reducing PolytetrafluoroethylFilm Film tension, i.e. ultra-hydrophobic processing method.
Summary of the invention
The object of the present invention is to provide a kind of ultra-hydrophobic processing method for polytetrafluoroethylthin thin film, this method is by biaxial tension
The polytetrafluoroethylene film of preparation pads fluorine-containing surfactant mixed liquor, then bakes.It is greatly reduced by this method poly-
The surface tension of tetrafluoroethene film.
Thus the technical solution adopted by the present invention is that: the present invention follows the steps below:
A, the preparation of fluorine-containing surfactant mixed liquor: in a solvent by fluorine-containing surfactant dissolution, and with crosslinking agent and urge
Agent mixing；
B, polytetrafluoroethylene film is padded into fluorine-containing surfactant mixed liquor, preliminary drying 1~10 minute at 80~150 DEG C, so
It is baked at 110~200 DEG C afterwards 1~10 minute；
The fluorine-containing surfactant is perfluor alcohols acrylate compounds, perfluoroalkyl aminated compounds and perfluorocarboxylic acid
The mixture of chromium complex；
The crosslinking agent is the mixture of melamine resin, EH and GGF-343；
The solvent is the mixture of methanol, isopropanol, acetoneand ethyl acetate.
The fluorine-containing surfactant mixed liquor, the additional amount of fluorine-containing surfactant be solvent quality 5~
100%, the additional amount of the crosslinking agent is the 3~10% of solvent quality, and the additional amount of the catalyst is the 0.1 of solvent quality
~4%.
The fluorine-containing surfactant is perfluor alcohols acrylate compounds, preferably perfluoro-ethyl ethylene (methyl) third
Olefin(e) acid ester, at least one of N- ethylperfluoro octyl sulfonamide ethylene acrylate.
The fluorine-containing surfactant is perfluorocarboxylic acid chromium complex, preferably perfluoro caprylic acid chromium complex.
The fluorine-containing surfactant is perfluoroalkyl aminated compounds, preferably perfluoro triethylamine, perfluamine, complete
At least one of fluorine tri-n-butylamine or perfluor triamylamine.
Compared with the prior art the present invention has the advantages that as follows:
1, super-hydrophobic polytetrafluoroethylene film can be prepared using the present invention, it is simple process, at low cost, there is significant economic effect
Benefit and social benefit.
2, the experimental results showed that, prepared by the method super-hydrophobic polytetrafluoroethylene film, surface tension is by 42 × 10- 3N/m drops to 8.6 × 10-3N/m or so.Super-hydrophobic polytetrafluoroethylene film can be widely used for dust-filtering, biochemical protective clothes and
The fields such as waterproof moisture permeable clothing.
Specific embodiment
Embodiment one:
The present invention follows the steps below:
A, the preparation of fluorine-containing surfactant mixed liquor: in a solvent by fluorine-containing surfactant dissolution, and with crosslinking agent and urge
Agent mixing；
B, polytetrafluoroethylene film is padded into fluorine-containing surfactant mixed liquor, preliminary drying 6 minutes at 120 DEG C, then at 160 DEG C
Under bake 8 minutes；
The fluorine-containing surfactant is perfluor alcohols acrylate compounds, perfluoroalkyl aminated compounds and perfluorocarboxylic acid
The mixture of chromium complex；
The crosslinking agent is the mixture of melamine resin, EH and GGF-343；
The solvent is the mixture of methanol, isopropanol, acetoneand ethyl acetate.
The fluorine-containing surfactant mixed liquor, the additional amount of fluorine-containing surfactant are the 60% of solvent quality, institute
The additional amount for stating crosslinking agent is the 8% of solvent quality, and the additional amount of the catalyst is the 2% of solvent quality.
The fluorine-containing surfactant is perfluoro-ethyl ethylene (methyl) acrylate.
The fluorine-containing surfactant is perfluoro caprylic acid chromium complex.
The fluorine-containing surfactant is the mixing that perfluoroalkyl aminated compounds is perfluoro triethylamine, perfluamine
Object.
Embodiment two:
The present invention follows the steps below:
A, the preparation of fluorine-containing surfactant mixed liquor: in a solvent by fluorine-containing surfactant dissolution, and with crosslinking agent and urge
Agent mixing；
B, polytetrafluoroethylene film is padded into fluorine-containing surfactant mixed liquor, preliminary drying 10 minutes at 80 DEG C, then at 120 DEG C
Under bake 10 minutes；
The fluorine-containing surfactant is perfluor alcohols acrylate compounds, perfluoroalkyl aminated compounds and perfluorocarboxylic acid
The mixture of chromium complex；
The crosslinking agent is the mixture of melamine resin, EH and GGF-343；
The solvent is the mixture of methanol, isopropanol, acetoneand ethyl acetate.
The fluorine-containing surfactant mixed liquor, the additional amount of fluorine-containing surfactant are the 60% of solvent quality, institute
The additional amount for stating crosslinking agent is the 6% of solvent quality, and the additional amount of the catalyst is the 1% of solvent quality.
The fluorine-containing surfactant is N- ethylperfluoro octyl sulfonamide ethylene acrylate.
The fluorine-containing surfactant is perfluoro caprylic acid chromium complex.
The fluorine-containing surfactant is perfluoroalkyl aminated compounds, preferably perfluorotributylamine and perfluor triamylamine
Mixture.
Claims (5)
- The hydrophobically modified method of 1.PTFE filter membrane, which is characterized in that follow the steps below:A, the preparation of fluorine-containing surfactant mixed liquor: in a solvent by fluorine-containing surfactant dissolution, and with crosslinking agent and urge Agent mixing；B, polytetrafluoroethylene film is padded into fluorine-containing surfactant mixed liquor, preliminary drying 1~10 minute at 80~150 DEG C, so It is baked at 110~200 DEG C afterwards 1~10 minute；The fluorine-containing surfactant is perfluor alcohols acrylate compounds, perfluoroalkyl aminated compounds and perfluorocarboxylic acid The mixture of chromium complex；The crosslinking agent is the mixture of melamine resin, EH and GGF-343；The solvent is the mixture of methanol, isopropanol, acetoneand ethyl acetate.
- 2. the hydrophobically modified method of PTFE filter membrane according to claim 1, which is characterized in that the fluorine-containing surfactants Agent mixed liquor, the additional amount of fluorine-containing surfactant are the 5~100% of solvent quality, and the additional amount of the crosslinking agent is solvent The 3~10% of quality, the additional amount of the catalyst are the 0.1~4% of solvent quality.
- 3. the hydrophobically modified method of PTFE filter membrane according to claim 1, which is characterized in that the fluorine-containing surfactants Agent is perfluor alcohols acrylate compounds, preferably perfluoro-ethyl ethylene (methyl) acrylate, N- ethylperfluoro octyl sulphonyl At least one of amine ethylene acrylate.
- 4. the hydrophobically modified method of PTFE filter membrane according to claim 1, which is characterized in that the fluorine-containing surfactants Agent is perfluorocarboxylic acid chromium complex, preferably perfluoro caprylic acid chromium complex.
- 5. the hydrophobically modified method of PTFE filter membrane according to claim 1, which is characterized in that the fluorine-containing surfactants Agent is perfluoroalkyl aminated compounds, and preferably perfluoro triethylamine, perfluamine, perfluorotributylamine or perfluor triamylamine be at least It is a kind of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711386834.0A CN109939573A (en) | 2017-12-20 | 2017-12-20 | The hydrophobically modified method of PTFE filter membrane |
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| CN201711386834.0A CN109939573A (en) | 2017-12-20 | 2017-12-20 | The hydrophobically modified method of PTFE filter membrane |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374972A (en) * | 2020-09-18 | 2021-02-19 | 赛纳生物科技(北京)有限公司 | Oil sealing liquid for biochemical chip |
| CN113578073A (en) * | 2021-06-03 | 2021-11-02 | 徐州禹慧环境科技研究院有限公司 | Preparation method of modified hollow fiber hydrophobic microporous membrane for membrane distillation |
| CN114425244A (en) * | 2022-01-18 | 2022-05-03 | 广州大学 | Preparation method and application of modified super-hydrophobic membrane based on polytetrafluoroethylene |
| CN114504951A (en) * | 2022-01-24 | 2022-05-17 | 华南理工大学 | Recyclable electret filtering membrane, preparation method thereof, cleaning method and charge regeneration method |
-
2017
- 2017-12-20 CN CN201711386834.0A patent/CN109939573A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374972A (en) * | 2020-09-18 | 2021-02-19 | 赛纳生物科技(北京)有限公司 | Oil sealing liquid for biochemical chip |
| CN113578073A (en) * | 2021-06-03 | 2021-11-02 | 徐州禹慧环境科技研究院有限公司 | Preparation method of modified hollow fiber hydrophobic microporous membrane for membrane distillation |
| CN114425244A (en) * | 2022-01-18 | 2022-05-03 | 广州大学 | Preparation method and application of modified super-hydrophobic membrane based on polytetrafluoroethylene |
| CN114504951A (en) * | 2022-01-24 | 2022-05-17 | 华南理工大学 | Recyclable electret filtering membrane, preparation method thereof, cleaning method and charge regeneration method |
| CN114504951B (en) * | 2022-01-24 | 2023-09-22 | 华南理工大学 | Recyclable electret filter membrane and preparation method, cleaning and charge regeneration method thereof |
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Application publication date: 20190628 |