Preparation method of sub-nano porous PES film

A sub-nanometer, pore size technology, applied in the field of materials, can solve the problems of large pore size, complex process and high cost, and achieve the effects of low cost, simple preparation process, good chemical and physical stability

Pending Publication Date: 2022-04-22
先进能源科学与技术广东省实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of complex process, high cost and relatively large pore size in the preparation of exi

Method used

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  • Preparation method of sub-nano porous PES film
  • Preparation method of sub-nano porous PES film

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Embodiment 1

[0027] This embodiment provides a method for preparing a subnanometer porous PES membrane, which includes the following steps in sequence:

[0028] (1) Irradiation with heavy ion beams, the PES film is uniformly irradiated with heavy ion beams, and the thickness of the PES film is 25 μm.

[0029] Heavy ions are heavy ions with more than 2 nucleons. In one embodiment, the heavy ion is one of tantalum ions, xenon ions or bismuth ions. The irradiation density is 2×10 10 ions / cm 2 , the heavy ion energy is 13.5MeV / u. This embodiment adopts 181 Ta ions are uniformly irradiated on the PES membrane in a vacuum environment through the Lanzhou Heavy Ion Accelerator, and the heavy ion beam is vertically irradiated on the horizontally placed PES membrane.

[0030] (2) Ultraviolet light sensitization, using ultraviolet light to sensitize both sides of the PES film, during the sensitization process, the intensity of ultraviolet light remains unchanged.

[0031] UV light sensitization...

Embodiment 2

[0044] This embodiment provides a method for preparing a subnanometer porous PES membrane, which includes the following steps in sequence:

[0045] (1) Irradiation with heavy ion beams. The heavy ion beams are used to uniformly irradiate the PES film, and the thickness of the PES film is 2 μm.

[0046] Heavy ions are heavy ions with more than 2 nucleons. In one embodiment, the heavy ion is one of tantalum ions, xenon ions or bismuth ions. The irradiation density is 1×10 0 ions / cm 2 , the heavy ion energy is 0.1MeV / u. The PES film is uniformly irradiated in a vacuum environment by the Lanzhou Heavy Ion Accelerator, and the heavy ion beam is irradiated vertically to the horizontally placed PES film.

[0047] (2) Ultraviolet light sensitization, using ultraviolet light to sensitize both sides of the PES film, during the sensitization process, the intensity of ultraviolet light remains unchanged.

[0048] UV light sensitization intensity is 35~45mW·cm -2 , UV light sensitizati...

Embodiment 3

[0061] This embodiment provides a method for preparing a subnanometer porous PES membrane, which includes the following steps in sequence:

[0062] (1) Irradiation with heavy ion beams, the PES film is uniformly irradiated with heavy ion beams, and the thickness of the PES film is 100 μm.

[0063] Heavy ions are heavy ions with more than 2 nucleons. In one embodiment, the heavy ion is one of tantalum ions, xenon ions or bismuth ions. The irradiation density is 5×10 11 ions / cm 2 , the heavy ion energy is 100MeV / u. The PES film is uniformly irradiated in a vacuum environment by the Lanzhou Heavy Ion Accelerator, and the heavy ion beam is irradiated vertically to the horizontally placed PES film.

[0064] (2) Ultraviolet light sensitization, using ultraviolet light to sensitize both sides of the PES film, during the sensitization process, the intensity of ultraviolet light remains unchanged.

[0065] UV light sensitization intensity is 35~45mW·cm -2 , UV light sensitization...

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Abstract

The invention discloses a preparation method of a sub-nano porous PES film, which sequentially comprises the following steps: heavy ion beam irradiation: uniformly irradiating the PES film with a heavy ion beam, the thickness of the PES film being 2-100 [mu] m; ultraviolet light sensitization: carrying out sensitization treatment on the double surfaces of the PES film by adopting ultraviolet light, and keeping the ultraviolet light intensity unchanged; and rinsing with water: immersing the sensitized PES membrane in water for rinsing at the water rinsing temperature of 70-90 DEG C for 4-7 minutes, taking out the membrane, and naturally airing to obtain the porous PES separation membrane with sub-nano pores. The PES film material is adopted, the porous polymer film with the pore diameter in the sub-nanometer size is prepared through heavy ion radiation, ultraviolet light sensitization and water rinsing, the preparation process is simple, efficient and low in cost, large-scale preparation can be achieved, compared with an existing conventional preparation method, the pore diameter of pores prepared through the method is smaller, and the pore diameter is smaller. And the prepared porous PES film has good chemical and physical stability.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a subnanometer porous PES membrane. Background technique [0002] In recent years, membranes with subnanometer pores have attracted extensive attention in many fields such as sewage treatment and seawater desalination due to their excellent ion separation properties. At present, the main methods used in the preparation of subnanoporous films at home and abroad include self-assembly, graphene stacking, or doping single-walled carbon nanotubes and so on. Although the above method can prepare polymer films with sub-nanometer pores, there are disadvantages such as complicated preparation process, high preparation cost, limited preparation scale, and limited application scenarios. [0003] In the prior art, PET, PC or PI membranes are generally used to prepare multi-aperture membranes, which are realized by chemical etching process. Finally, the pore size of the prepar...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00
CPCB01D71/68B01D67/0002
Inventor 吴书航
Owner 先进能源科学与技术广东省实验室
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