Method for coating biomimetic mineralized assembled super-hydrophilic organic-inorganic hybrid membrane

A biomimetic mineralization and super-hydrophilic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effect of improving hydrophilicity

Active Publication Date: 2015-01-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the research only stays in the study of crystals, and there are few studies on the separ

Method used

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  • Method for coating biomimetic mineralized assembled super-hydrophilic organic-inorganic hybrid membrane
  • Method for coating biomimetic mineralized assembled super-hydrophilic organic-inorganic hybrid membrane
  • Method for coating biomimetic mineralized assembled super-hydrophilic organic-inorganic hybrid membrane

Examples

Experimental program
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Embodiment 1

[0057] (1) dissolving polyethyleneimine and polyacrylic acid in water to form solutions of 0.125wt% and 0.025wt% respectively, stirring and ultrasonic defoaming to prepare a film-forming solution;

[0058] (2) Fix the PAN base film on the loading tray of the film carrier, and adjust the speed of the low-speed motor to be constant;

[0059] (3) Place polyethyleneimine, deionized water, and polyacrylic acid solution in the pressure barrel respectively;

[0060] (4) under a pressure of 0.3MPa, the polyethyleneimine solution is sprayed onto the surface of the porous support to form a polycationic film layer on the surface of the support;

[0061] (5) under the pressure of 0.3MPa, deionized water is sprayed onto the surface of the film layer, and the polycation film layer is rinsed;

[0062] (6) Under the pressure of 0.3MPa, the polyacrylic acid solution is sprayed onto the surface of the support, so that the polyanions and polycations react to form a single-layer composite separa...

Embodiment 2

[0080] (1) dissolving polyethyleneimine and polyacrylic acid in water to form solutions of 0.125wt% and 0.025wt% respectively, stirring and ultrasonic defoaming to prepare a film-forming solution;

[0081] (2) Fix the PAN base film on the loading tray of the film carrier, and adjust the speed of the low-speed motor to be constant;

[0082] (3) Place polyethyleneimine, deionized water, and polyacrylic acid solution in the pressure barrel respectively;

[0083] (4) under a pressure of 0.3MPa, the polyethyleneimine solution is sprayed onto the surface of the porous support to form a polycationic film layer on the surface of the support;

[0084] (5) under the pressure of 0.3MPa, deionized water is sprayed onto the surface of the film layer, and the polycation film layer is rinsed;

[0085] (6) Under the pressure of 0.3MPa, the polyacrylic acid solution is sprayed onto the surface of the support, so that the polyanions and polycations react to form a single-layer composite separa...

Embodiment 3

[0103] (1) dissolving polyethyleneimine and polyacrylic acid in water to form solutions of 0.125wt% and 0.025wt% respectively, stirring and ultrasonic defoaming to prepare a film-forming solution;

[0104] (2) Fix the PAN base film on the loading tray of the film carrier, and adjust the speed of the low-speed motor to be constant;

[0105](3) Place polyethyleneimine, deionized water, and polyacrylic acid solution in the pressure barrel respectively;

[0106] (4) under a pressure of 0.3MPa, the polyethyleneimine solution is sprayed onto the surface of the porous support to form a polycationic film layer on the surface of the support;

[0107] (5) under the pressure of 0.3MPa, deionized water is sprayed onto the surface of the film layer, and the polycation film layer is rinsed;

[0108] (6) Under the pressure of 0.3MPa, the polyacrylic acid solution is sprayed onto the surface of the support, so that the polyanions and polycations react to form a single-layer composite separat...

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Abstract

The invention discloses a method for coating a biomimetic mineralized assembled super-hydrophilic organic-inorganic hybrid membrane, and belongs to the technical field of membranes. The method comprises the following steps: respectively preparing membrane solutions from polycations and polyanions, and alternatively spraying the membrane solutions onto a polyacrylonitrile flat membrane for multiple times to form a multilayer polyelectrolyte membrane; and then respectively adding calcium chloride and sodium carbonate into polycation and polyanion solutions to prepare a mixed solution, and assembling the mixed solution to the multilayer polyelectrolyte membrane by using a LbL coating technology, wherein carboxyl in the polyanions can be combined with Ca<2+> through electrostatic interaction and then combined with CO3<2-> through ion interaction, and thus the calcium carbonate hybrid membrane is obtained. A super-hydrophilic surface can be obtained by adjusting the concentration of a calcium source. The calcium carbonate hybrid membrane is applied in the field of pervaporation for the first time. In a 95wt% ethanol/water system, the permeation flux can reach 1,317g/(m<2>.h) and is increased by at least 4 times relative to an organic membrane made from (PEI/PAA) 20.

Description

technical field [0001] The invention relates to the preparation of an organic-inorganic hybrid membrane, in particular to the preparation of a high-performance organic-inorganic hybrid pervaporation membrane by combining self-assembly of sprayed coating layers and biomimetic mineralization, and belongs to the technical field of membranes. Background technique [0002] Membrane material and film formation method are the key factors to determine the membrane performance. As a new type of membrane, organic-inorganic hybrid membrane can make up for the insurmountable defects of single-material membranes. In the past 10 years, research on hybrid membranes in the field of pervaporation has gradually attracted people's attention. However, most common organic-inorganic hybrid pervaporation membranes have not fundamentally solved the "Trade-off" phenomenon. [0003] For organic-inorganic hybrid pervaporation membranes that are preferentially permeable to water, the hydrophilicity of...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00
Inventor 张国俊巩莉丽秦振平纪树兰王乃鑫
Owner BEIJING UNIV OF TECH
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