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Polyether sulfone porous film preparation method

A polyethersulfone and porous membrane technology, which is applied in the field of preparation of polyethersulfone porous membrane materials, can solve the problem of insufficient mechanical properties and stability of the honeycomb ordered membrane, limiting the practical application of the honeycomb ordered membrane, and the pore size distribution inside the membrane. Irregularity and other problems, to achieve the effect of cheap raw materials, good connectivity, and large porosity

Active Publication Date: 2017-03-29
海宁市钱江兴业投资开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has considerable requirements on the type and structure of the film-forming material. Only materials that can stabilize the water droplet template can self-organize to form an ordered porous film; at the same time, the mechanical properties and stability of the honeycomb ordered film prepared by this method Insufficient properties greatly limit the practical application of these honeycomb ordered membranes
In addition, in the films prepared by the water drop template method, the honeycomb pores mainly exist on the surface of the membrane, the pore size distribution inside the membrane is irregular, and the continuity of the pores is not good, which limits the scope of application.

Method used

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Embodiment 1

[0022] Add 1 g of glucose into an organic solvent composed of 60 mL of N-methylpyrrolidone and 20 mL of acetone, and stir until dissolved. Then add 9 g of polyethersulfone, stir and dissolve at 60 °C, degas at a constant temperature, and then scrape the film on the surface of a clean and dry glass plate with a scraper. The thickness of the casting solution is 200 μm, and then put the glass plate coated with the casting solution on the Into a room with a humidity of 75%, the film will form after 2 hours. figure 1 For the surface and cross-sectional morphology of the prepared membrane, it can be seen from the figure that the pores of the membrane have good connectivity.

Embodiment 2

[0024] Add 2 g of glucose into an organic solvent composed of 60 mL of N-methylpyrrolidone and 20 mL of acetone, and stir until dissolved. Then add 8 g of polyethersulfone, stir and dissolve at 60°C, degas at a constant temperature, and then use a scraper to scrape the film on the surface of a clean and dry glass plate. The thickness of the casting solution is 200 μm, and then put the glass plate coated with the casting solution on the Into a room with a humidity of 75%, the film formed after 2 hours. figure 2 For the surface and cross-sectional morphology of the prepared membrane, it can be seen from the figure that the membrane pores are a three-dimensional network structure with good connectivity, and the diameter of the membrane pores is about 5 μm.

Embodiment 3

[0026] Add 3 g of glucose into an organic solvent composed of 60 mL of N-methylpyrrolidone and 20 mL of acetone, and stir until dissolved. Then add 7 g of polyethersulfone, stir and dissolve at 60°C, degas at a constant temperature, and then use a scraper to scrape the film on the surface of a clean and dry glass plate. The thickness of the casting solution is 200 μm, and then put the glass plate coated with the casting solution on the Into a room with a humidity of 75%, the film formed after 2 hours. image 3 For the surface and cross-sectional morphology of the prepared membrane, it can be seen from the figure that the membrane pore diameter is about 6 μm.

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Abstract

The present invention relates to a porous film preparation process, particularly to a polyether sulfone porous film material preparation method. The polyether sulfone porous film preparation method comprises: 1) adding glucose powder to an organic solvent, stirring until completely dissolving, adding polyether sulfone, stirring at a temperature of 50-70 DEG C until completely dissolving, and carrying out standing deaeration to obtain a polyether sulfone film casting liquid; and 2) spreading the obtained polyether sulfone film casting liquid on a glass plate by using a scraping cutter, and placing at a temperature of 20-30 DEG C under a relative humidity of 55-95% until the organic solvent completely volatilizes so as to form the film, wherein the mass fraction of the glucose in the polyether sulfone is 10-30%. According to the present invention, the pore size distribution of the prepared polyether sulfone porous film is uniform, the pore size can be adjusted by adjusting the ratio of the glucose to the polyether sulfone, the connectivity between the pores in the film is good, and the porosity is large; and the method has advantages of simple operation, no requirement of special equipment, cheap raw materials, no toxicity, and no pollution.

Description

technical field [0001] The invention relates to a preparation process of a porous membrane, in particular to a preparation method of a polyethersulfone porous membrane material. Background technique [0002] In recent years, ordered porous materials have been widely used in photonic crystals, high-efficiency catalysis, separation, and life sciences. At present, there are mainly colloidal crystal template methods, biological template methods, emulsion droplet template methods, block copolymer microphase separation template methods, etc. in the construction of nano-micro-scale surface microstructures. However, these methods have certain limitations, need to remove the template, and the porous structure is difficult to control. [0003] The water drop template method proposed by French scientist Francois et al. provides a new method for the preparation of ordered honeycomb microporous films. This method has mild reaction conditions, simple operation steps, and low cost, and ha...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L81/06C08K5/1545
CPCC08J9/28C08J2201/0502C08J2381/06C08K5/1545C08L81/06
Inventor 黄健
Owner 海宁市钱江兴业投资开发有限公司
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