Acid, alkali and organic solvent resisting diaphragm material, and preparation method and application thereof

A technology resistant to organic solvents and diaphragm materials, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high cost of membrane materials, narrow range of acid and alkali resistance and solvent resistance, and meet separation requirements. The effect of maintaining hydrophilicity and preventing the decrease of hydrophilicity

Active Publication Date: 2016-03-30
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a diaphragm material resistant to acid and alkali and organic solvents and its preparation method and application for membrane ext

Method used

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  • Acid, alkali and organic solvent resisting diaphragm material, and preparation method and application thereof
  • Acid, alkali and organic solvent resisting diaphragm material, and preparation method and application thereof
  • Acid, alkali and organic solvent resisting diaphragm material, and preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0041] Example 1

[0042] Prepare a homogeneous and clear casting liquid as follows: Dissolve 25 grams of methyl isopropylene-propenol copolymer (with 45% of allyl alcohol) in 75 grams of N-methylpyrrolidone and heat at 80°C, Stir for 12h until it is uniform, colorless and clear, and the viscosity of the casting film is 10000cp, and let stand to defoam. At an ambient temperature of 25°C and a relative humidity of 60%, the casting liquid was scraped with a 200μm scraper to form a nascent film, and then quickly immersed in a water bath at 20°C to solidify into a film. After washing, use 30% ethylene glycol moisturizing treatment, and use 0.1mol / L LiCl / water as the raw material for Li + Ion diffusion test, the diffusion rate is 1.76*10 -8 mol·cm -2 ·S -1 . For the scanning electron micrograph of the prepared diaphragm material, see figure 1 . figure 1 The crosssection in represents: cross section; topsurface represents: surface; topskin represents: epithelial layer; bottomskin repr...

Example Embodiment

[0043] Example 2

[0044] Prepare a homogeneous and clear casting liquid as follows: Dissolve 22 grams of ethylene-acrylic acid copolymer (in which the ethylene content is 50%) in 78 grams of dimethyl sulfoxide, leave it to stand for 6 hours to defoam, and the ambient temperature is 25 At a temperature of 60% and a humidity of 60%, the obtained homogeneous casting film was scraped on a 54um non-woven fabric support layer with a 100μm scraper to form a supported nascent membrane, which was quickly immersed in a 3.5°C gel bath to solidify into a film. After washing with water, 30% glycerin is used for moisturizing treatment to prepare a flat diaphragm material. See figure 2 with image 3 , Are the cross-sectional topography of the flat diaphragm material and the cross-sectional topography of the non-woven fabric support section. As shown in the figure, the thickness of the prepared film is 70.2μm, and 0.1mol / LLiCl / water is used as the raw material for Li + Ion diffusion test, the...

Example Embodiment

[0045] Example 3

[0046] Prepare a homogeneous and clear casting solution as follows: Dissolve 30 grams of ethylene-vinyl alcohol copolymer, of which ethylene content is 38%, in 70 grams of N,N-dimethylacetamide at 100°C, and seal and stand still. After 6 hours of defoaming, at an ambient temperature of 18.1°C and a humidity of 55%, the obtained homogeneous casting film was scraped on the glass plate with a 200μm scraper to form a nascent film, which was quickly immersed in a 1.5°C gel bath to solidify into a film , 25% polyethylene glycol moisturizing treatment after water washing, thus obtaining the final product. The thickness of the prepared film is 102.5μm, and 0.1mol / LLiCl / water is used as the raw material to carry out the Li+ ion diffusion test, and the diffusion rate is 1.97*10 -8 mol·cm -2 ·S -1 , With 0.1035mol / LLiCl+1.0mol / LNaOH as the water phase, 0.4mol / LHA+0.2mol / LQCl in the organic phase (where HA and QCl refer to 1-phenylazo-2-naphthol and methyl Trioctyl ammoni...

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Abstract

The invention discloses an acid, alkali and organic solvent resisting diaphragm material, and a preparation method and an application thereof. The diaphragm material is prepared from hydrophilic and hydrophobic block copolymers, and has a nano-pore structure. The nano-pore structure in the diaphragm material is prepared through an inorganic filler structure preparation method or an immersion phase separation method. The acid, alkali and organic solvent resisting diaphragm material has polar hydrophilic groups, and the surface of a diaphragm can be further grafted with other organic molecules with permselective functional groups by using above active groups, so realization of diaphragm functionalization is facilitated to meet various separation requirements. The diaphragm material can be applied in cation separating systems, such as separation of ions of lithium, copper, gold, platinum, palladium, silver, boron, rubidium, cesium, antimony, bismuth, nickel, mercury and other metals.

Description

technical field [0001] The invention belongs to the field of polymer membrane materials, and in particular relates to an acid-alkali-resistant and organic-solvent-resistant diaphragm material and a preparation method and application thereof. Background technique [0002] The membrane extraction process is a new type of extraction process with high efficiency and low energy consumption, which can be applied to ion selective extraction, separation of organic matter in waste liquid and other separation processes. In the membrane extraction process, the highly selective extractant is the carrier or core, and it is hoped to control its loss to the minimum, and at the same time, the ions and other substances to be separated can be freely transmitted. The extractant in the membrane extraction process is generally an organic solvent substance, so it is particularly important to use a material resistant to organic solvents as the diaphragm material. [0003] In addition, this type o...

Claims

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Application Information

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IPC IPC(8): B01D71/80B01D69/02B01D67/00
Inventor 何涛宋健锋李雪梅孔丁峰陈光华赵宝龙王周为殷勇姜标陈刚张冉张蒙晰田苗苗刘仁啸邢利新
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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