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Preparation method of novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified micropore spheres

A technology of polyphenylene sulfone and microporous balls, which is applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc. It can solve the problems of difficult dispersion and degradation of membrane performance, and achieve improved separation performance and high selectivity , the effect of great development potential

Inactive Publication Date: 2016-08-17
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, since ZIF-8 crystals are not easy to disperse when added to the film-forming solution, the agglomeration of ZIF-8 crystals will easily lead to a decrease in film performance.

Method used

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  • Preparation method of novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified micropore spheres
  • Preparation method of novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified micropore spheres
  • Preparation method of novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified micropore spheres

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[0019] The invention provides a ZIF-8 microporous ball-filled polyphenylene sulfone membrane used for separating organic solutions by nanofiltration and a preparation method thereof. First, synthesize nano-scale ZIF-8 particles and ZIF-8 microporous balls, and then add unmodified polyacrylate carboxyl microspheres, ZIF-8 particles, and ZIF-8 microporous balls into polyphenylene in a certain proportion. In the membrane-making solution of sulfone, the composite membrane is obtained through post-treatment.

[0020] Synthesis of ZIF-8 microporous spheres: 1.95g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of methanol to obtain a zinc salt solution, 4.9 g of 2-methylimidazole was dissolved in 100 mL of methanol to form a 2-methylimidazole solution, and 1.0 g of polyacrylate carboxyl microspheres were added to 100 mL of methanol to disperse uniform. Mix the microsphere dispersion with the zinc salt solution, stir in a constant temperature oscillator at 30°C and 150 r / min for 24 h...

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Abstract

The invention discloses preparation of modified micropore spheres on the basis of a ZIF-8 type metal-organic framework material and a preparation method for preparing a novel polyphenylene sulfone solvent-resistant nanofiltration membrane by applying the modified micropore spheres. The method comprises the steps that ZIF-8 nanoparticles grow inside macropore spheres and on the surfaces of the macropore spheres, and the modified micropore spheres are obtained; the modified novel micropore spheres are added to a polyphenylene sulfone membrane casting solution, and the novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing the modified micropore spheres is prepared through an immersion-phase conversion method. The reparation method of the novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing the modified micropore spheres has the advantages that nano-scaled porous structures of the modified micropore spheres are utilized for improving the pore structure of the polyphenylene sulfone membrane, large-size solute molecules in the organic solution are effectively intercepted, and fluid channels, facilitating solvent permeation, in the membrane are increased; when the addition ratio of the modified micropore spheres is 1.0 wt%, the membrane property is the best, and the permeation flux and interception rate can be increased simultaneously.

Description

technical field [0001] The invention relates to the preparation of a novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified microporous balls to realize high-selectivity separation performance. The novel polyphenylene sulfone solvent-resistant nanofiltration membrane of the present invention utilizes the nanoscale porous structure of the modified microporous sphere to improve the pore structure of the polyphenylene sulfone membrane, so as to effectively retain large-sized solute molecules in the organic solution and increase the The fluid channels in the membrane are conducive to the passage of solvents, which can be applied to organic solvents and remain stable. Background technique [0002] Nanofiltration is a membrane separation technology driven by pressure difference, between reverse osmosis and ultrafiltration, and the cut-off particle size is nano-scale particles. It has no phase change in the separation process, high selectivity, hi...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D69/02B01D69/12
CPCB01D67/0002B01D67/0009B01D67/0093B01D69/02B01D69/12B01D71/68
Inventor 王璐莹代娟雷建都
Owner BEIJING FORESTRY UNIVERSITY
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