Preparation method of high-corrosion-resistance polyarylene sulfide sulfone separation membrane

A polyarylene sulfide sulfone, high corrosion resistance technology, applied in the field of membrane material preparation, can solve the problems of low conversion rate, high temperature oxidation is difficult to control, membrane pores are easy to lose water and deform, and achieve strong stability and good size The effect of stability

Inactive Publication Date: 2012-12-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-temperature oxidation described in this patent is often difficult to control, and the conversion rate is low (Ryoji Noyori, Masao Aokib, Kazuhiko Sato, Green Oxidation with Aqueous Hydrogen Peroxide[J], CHEM.COMMUN.,2003,1977–1986), and at high temperature Membrane pores are easy to lose water and deform, and the membrane is easy to become brittle, which affects subsequent use

Method used

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  • Preparation method of high-corrosion-resistance polyarylene sulfide sulfone separation membrane
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  • Preparation method of high-corrosion-resistance polyarylene sulfide sulfone separation membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1: Preparation of high corrosion resistance polyarylene sulfide sulfone flat membrane

[0037] Add 18g of polyarylene sulfide sulfone resin, 77g of N-methylpyrrolidone, and 5g of polyethylene glycol into a dissolution kettle equipped with a stirrer and a thermometer, stir and dissolve at a temperature of 60°C, and defoam at a vacuum degree of 0.1MPa for 5h to prepare into a uniform film-making solution. Scrape the film-making solution evenly on the quartz glass plate (temperature 40°C) with a flat-plate scraping machine, then immerse the nascent film in deionized water (25°C) to replace the additives and solvents, and the gel is solidified into polyarylene sulfide Sulfone separation membrane.

[0038] The prepared polyarylene sulfide sulfone separation membrane was immersed in 50 ml of glacial acetic acid, and 15 ml of hydrogen peroxide was added under magnetic stirring. After constant temperature at 80°C for 7 hours, wash with deionized water, and then go thr...

Embodiment 2

[0039] Example 2: Preparation of High Corrosion Resistance Polyarylene Sulfide Hollow Fiber Membrane

[0040] Put 200g of polyarylene sulfide sulfone resin, 750g of N-methylpyrrolidone, 30g of polyvinyl alcohol, and 20g of zinc chloride into a dissolution kettle to dissolve at 150°C, filter to remove solid impurities, and vacuum defoam at -0.4MPa to prepare a spinning solution.

[0041] The hollow fiber membrane is prepared by dry-wet spinning, the inner diameter of the spinneret is 0.9mm, the outer diameter is 1.4mm, the spinning rate is 10ml / min, the draw ratio is 3 times, the external coagulation bath is water, and the core liquid is 50% ethanol solution.

[0042] Then put a bundle of 15cm long hollow fiber membranes into a measuring cylinder filled with 100ml ethanol, 10ml98% concentrated sulfuric acid, and 10ml hydrogen peroxide. The finished product of polyarylene sulfide sulfone hollow fiber membrane. Pore ​​preserving agent is 30wt% glycerol aqueous solution.

Embodiment 3

[0043] Example 3: Preparation of highly corrosion-resistant polyarylene sulfide sulfone cation separation membrane

[0044]Solution 1 was prepared by dissolving 16 g of chloromethylated polyarylene sulfide sulfone in 84 g of N-methylpyrrolidone. Solution 2 was prepared by dissolving 18 g of sulfonated polyarylene sulfide sulfone in 82 g of N-methylpyrrolidone. Cast solution 1 on a glass plate, heat and dry in a constant temperature drying oven at 110°C for 30 minutes to form a polymer base film, then coat solution 2 on the copolymer layer, and then spread a layer on the nascent film. A 0.14mm thick polypropylene non-woven fabric was laid, heated and dried in a constant temperature drying oven at 110°C for 30 minutes, and the product was peeled off from the glass plate to prepare a double-layer composite film.

[0045] Soak the prepared dense polyarylene sulfide sulfone membrane in a mixed solution of 200ml acetic acid and 50ml peracetic acid at a constant temperature of 30°C ...

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Abstract

The invention discloses a preparation method of a high-corrosion-resistance polyarylene sulfide sulfone separation membrane, which is characterized by comprising the following steps of: agitating and dissolving the following components in parts by weight at 30-150 DEG C of 100-300 parts of polyarylene sulfide sulfone, 1-150 parts of hydrophilic polymer, 1-400 parts of additive and 300-900 parts of solvent; carrying out vacuum de-foaming and curing to obtain a uniform polymer solution; immersing a polyarylene sulfide sulfone porous flat plate membrane, a hollow fiber membrane or a dense membrane prepared by a phase transferring method or a solvent evaporation method into an organic solvent which takes a concentrated acid as a catalyst to be oxidized by an oxidant; and then carrying out procedures of water washing, pore keeping and drying, and removing a residual solvent to obtain the high-corrosion-resistance polyarylene sulfide sulfone separation membrane. The separation membrane disclosed by the invention has the very strong stability and can be widely applied to separation fields of medicines, biochemistry, foods, metallurgy, coal mines, fuel batteries containing acids, alkalis and organic solvents, and high-temperature and strict production conditions.

Description

Technical field: [0001] The invention relates to a preparation method of a highly corrosion-resistant polyarylene sulfide sulfone separation membrane, which belongs to the field of membrane material preparation. Background technique: [0002] Due to the advantages of high efficiency and energy saving, membrane separation technology is widely used in chemical industry, environmental protection, food, biology, pharmaceuticals, electronics, electric power, metallurgy, textile, seawater desalination and other fields, and has become an important solution to contemporary energy, resource and environmental pollution problems. high technology. Most of the separation membranes on the market have a pH range of 2-11. [0003] Polyarylene sulfide sulfone (PASS) is a high glass transition temperature (T g =215~226℃) amorphous polymer with good mechanical properties, high temperature resistance, radiation resistance, chemical corrosion resistance, high insulation and low dielectric loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00
Inventor 杨杰王娟王孝军张刚龙盛如
Owner SICHUAN UNIV
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