Polyether-ether-ketone porous film and preparation thereof

A technology of polyether ether ketone and porous membrane, which is applied in the field of polyether ether ketone porous membrane and its preparation, can solve the problems of high temperature resistance, general solvent resistance, and limited use value, and achieve narrow pore size distribution, high porosity, high intensity effect

Inactive Publication Date: 2008-08-06
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of membrane materials, regardless of its strength, or its high temperature resistance and solvent resistance, the use value is limited.

Method used

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  • Polyether-ether-ketone porous film and preparation thereof
  • Polyether-ether-ketone porous film and preparation thereof
  • Polyether-ether-ketone porous film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The polyetheretherketone has a number-average molecular weight of 160,000, the diluent is benzophenone, and its components are 20% by mass of polyetheretherketone and 80% by mass of benzophenone. Heat up to 260°C in a high-temperature stirred tank, stir and mix evenly. The obtained polymer homogeneous solution is directly coated on the template, and water is selected as the cooling liquid for the cooling bath. Immersed in cooling liquid to make the solution phase-separated and solidified to form a film, then extracted with acetone and dried. The thickness of the obtained flat film is 150 μm, the cross-sectional pore structure of the film is a branch-like pore structure, the internal average pore diameter is 0.09 μm, and the porosity is 80%. The electron microscope photos are as follows: figure 1 shown. At 25°C, the pure water flux is 1100L / m 2 ·hr·0.1MPa. Below 250°C, after immersion in acid solution (0.4mol / L sulfuric acid solution) and lye solution (0.4mol / L NaOH ...

Embodiment 2

[0026] The number average molecular weight of polyether ether ketone is 160,000, the number average molecular weight of polyphenylene sulfide is 90,000, and the diluent is benzophenone. Its components are 10% by mass of polyether ether ketone, 10% by mass of polyphenylene sulfide, and 80% by mass of benzophenone. Heat up to 280°C in a high-temperature stirred tank, stir and mix evenly. The resulting homogeneous solution of the polymer was coated directly on the template. The cooling bath chooses water as the cooling liquid. Immersed in cooling liquid to make the solution phase-separated and solidified to form a film, then extracted with acetone and dried. The thickness of the obtained flat film is 150 μm, the cross-sectional pore structure of the film is a branch-like pore structure, the internal average pore diameter is 0.2 μm, and the porosity is 85%. The electron microscope photos are as follows: figure 2 shown. At 25°C, the pure water flux is 1500L / m 2 ·hr·0.1MPa. B...

Embodiment 3

[0028] The number-average molecular weight of polyetheretherketone is 160,000, and the diluents are diphenyl ether and benzophenone. Its components are 20% by mass of polyether ether ketone, 40% by mass of diphenyl ether and 40% by mass of benzophenone. Heat up to 260°C in a high-temperature stirred tank, stir and mix evenly. The resulting homogeneous solution of the polymer was coated directly on the template. The cooling bath selects ethanol as the cooling liquid. Immersed in cooling liquid to make the solution phase-separated and solidified to form a film, then extracted with ethanol and dried. The thickness of the obtained flat film is 150 μm, the cross-sectional pore structure of the film is a spheroidal pore structure, the internal average pore diameter is 0.15 μm, and the porosity is 75%. The electron microscope photo is as follows: image 3 shown. At 25°C, the pure water flux is 1250L / m 2 ·hr·0.1MPa. Below 100°C, after immersion in acid solution (0.4mol / L sulfuri...

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Abstract

The invention discloses a porous membrane of PEEK and a preparation method thereof. The porous membrane of PEEK is produced by polymer material that contains the PEEk with the inner pore diameter of 0.09 to 0.2Mum and porosity rate of 70 to 90 percent. The invention adopts the PEEK material with excellent performance as the membrane material which is dissolved at the high temperature and then heterogeneous separated at low temperature to prepare the porous membrane of PEEK of high strength, high temperature resistance and solvent-resistance. Compared with the porous membranes of polyvinylidene fluoride, polyethylene and polypropylene, etc., the porous membrane of PEEK has the advantages of narrowly distributed pore diameter, high porosity rate, high strength, high temperature resistance and solvent-resistance which can be widely applied to the fields such as micro-filtration and ultra-filtration, especially the membrane process of ultra-filtration and micro-filtration at high temperature, and even can replace the inorganic membrane.

Description

technical field [0001] The invention relates to a polyether ether ketone porous membrane and a preparation method thereof. Background technique [0002] The Thermally Induced Phase Separation (TIPS) method is a method for making microporous membranes that emerged in the 1980s. It is especially suitable for membranes that cannot be formed by the non-lyotropic phase separation (NIPS) method without a suitable solvent at room temperature. of polymers. Compared with the dry and wet methods of the NIPS method, the TIPS method has at least the following advantages: fewer influencing factors, easier control of the film forming process, higher strength of the formed film, and higher porosity. After years of development, the TIPS method has been applied industrially. The porous membrane prepared by the TIPS method is mainly used for wastewater treatment, reclaimed water reuse, and upper water treatment through membrane processes such as microfiltration and ultrafiltration. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/52
Inventor 丁怀宇施艳荞陈观文张强
Owner INST OF CHEM CHINESE ACAD OF SCI
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