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Catalytic hollow fiber membrane and preparation method thereof

A fiber membrane and hollow technology, applied in the field of catalytic hollow fiber membrane and its preparation, can solve problems such as difficulties in porous membranes

Inactive Publication Date: 2015-09-30
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like polytetrafluoroethylene, polyperfluoroethylene propylene also has the characteristics of "insoluble and infusible", so it is difficult to process into porous membranes

Method used

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  • Catalytic hollow fiber membrane and preparation method thereof
  • Catalytic hollow fiber membrane and preparation method thereof
  • Catalytic hollow fiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Polyperfluoroethylene propylene with a hexafluoropropylene content of 18% is used as the polymer matrix phase; the adsorption activated carbon content is 5%; the composite porogen is 0.01 μm SiO 2 A mixture of powder and PEO, the former is an insoluble porogen, accounting for 30% of the total composite porogen, and the latter is a soluble porogen, accounting for 70% of the total composite porogen; organic low molecular liquid Choose DOP. The distribution ratio of each component in the film-forming system is as follows:

[0020]

[0021] Adsorption activated carbon, composite porogen and organic low-molecular liquid are forced to mix uniformly through a mixing tank to obtain a viscous mixture, which is then mixed with polyperfluoroethylene propylene polymer resin and fed to a twin-screw extruder. The hollow fiber spinneret is used for melt blending and spinning to make membranes. The temperature of the five twin-screw zones is 270°C, 280°C, 290°C, 300°C, and 310°C, a...

Embodiment 2

[0023] In Example 1, the insoluble porogen SiO 2 The ratio of the porogen is adjusted to 10% of the total amount of the porogen, the ratio of the soluble porogen PEO is adjusted to 90%, and other conditions remain unchanged, and three kinds of hollow membranes are obtained. Correspondingly recorded as 4#, 5# and 6# film.

Embodiment 3

[0025] Polyperfluoroethylene propylene with a hexafluoropropylene content of 18% is used as the polymer matrix phase; the adsorption activated carbon content is 10%; the composite porogen is 0.01 μm SiO 2 Powder, 5μm CaCO 3 A mixture of powder and PEO, the former two are insoluble porogens, the mass ratio of the two is 1 / 1, accounting for 30% of the total composite porogen, and the latter is a soluble porogen, accounting for 30% of the total composite porogen 70% of the total amount of the agent; DOP is selected as the organic low molecular liquid. The distribution ratio of each component in the film-forming system is as follows:

[0026]

[0027] Adsorption activated carbon, composite porogen and organic low-molecular liquid are forced to mix uniformly through a mixing tank to obtain a viscous mixture, which is then mixed with perfluoropolymer resin and then fed into a twin-screw extruder. The filament assembly was melt-blended and spun into a film. The temperature in th...

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Abstract

The invention discloses a catalytic hollow fiber membrane and a preparation method thereof. The method for preparing the catalytic hollow fiber membrane comprises the following steps: pouring adsorptive activated carbon, a composite pore-foaming agent and organic low molecular liquid into a mixing tank for performing forced mixing at a certain mass ratio, forming a viscous mixture, uniformly mixing with a tetrafluoroethylene-hexafluoropropylene copolymer resin, injecting into a double-screw extruder, performing melt spinning at the temperature of 270-330 DEG C, and preparing a hollow fiber membrane; performing the conventional water extraction and after-drawing, casting the hollow fiber membrane into a membrane assembly, adsorbing 0.05mol / L Fe<3+> to the membrane by virtue of dynamic adsorption under the negative pressure condition, thereby obtaining the catalytic hollow fiber membrane; and finally, degrading the organic matter by utilizing a Fenton reaction.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to a catalytic hollow fiber membrane and a preparation method thereof. Background technique [0002] As a modified material of polytetrafluoroethylene (PTFE), polyperfluoroethylene propylene (FEP) not only has excellent corrosion resistance, heat resistance, non-stickiness, low friction coefficient, Atmospheric aging resistance and other excellent properties, while overcoming the shortcomings of PTFE's easy cold flow, difficult welding, and difficult melt processing, it has good thermoplastic processability that PTFE cannot match. It can be melt-processed by conventional processing technology, and as a high-performance engineering plastic, it has been widely used in aerospace, chemical industry, electronics, medical treatment, textile and other fields. [0003] The outstanding chemical stability and excellent high and low temperature performance of polyperfluoroethylene propylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/32B01D69/08B01D67/00C02F1/28C02F1/32C02F1/44C02F1/72C02F101/30
Inventor 黄庆林陈凯凯肖长发孟潇
Owner TIANJIN POLYTECHNIC UNIV
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