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Functional composite membrane capable of recognizing alkali metal ions and preparation method thereof

An alkali metal ion, composite membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of raw materials for synthetic membrane materials and limitations of membrane production methods

Inactive Publication Date: 2011-05-25
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is the limitation of the raw materials of its synthetic membrane materials and the method of membrane production.

Method used

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  • Functional composite membrane capable of recognizing alkali metal ions and preparation method thereof
  • Functional composite membrane capable of recognizing alkali metal ions and preparation method thereof
  • Functional composite membrane capable of recognizing alkali metal ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) 3-triethoxysilyl-1-propylamine and phenylisocyanate are mixed in a three-necked flask in a molar ratio of 1:1, and toluene is added thereto so that the content of toluene is 80Wt%. Stirring and reacting at 80° C. for 5 hours, and recrystallizing and purifying the product after completion of the reaction to obtain a silicon-containing compound containing ureido groups. The product was characterized as the target product by FT-IR, NMR, DSC and other methods.

[0050] (2) the silicon-containing compound that contains urea group that step (1) obtains is dissolved in chloroform and is mixed with the solution that concentration is 1.2M, and adds the concentrated hydrochloric acid (mass concentration is 37%) as catalyst, the add-on of concentrated hydrochloric acid is the catalytic amount; after standing for 8 hours, the silicon-containing compound solution containing urea group is obtained, and it is set aside;

[0051] (3) Soak the dried polyacrylonitrile (PAN) micropor...

Embodiment 2

[0054] (1) γ-aminopropyltriethoxysilane and 3,4-dimethoxyphenylisocyanate are mixed in a three-necked flask in a molar ratio of 1:1, and benzene is added thereto so that the content of benzene is 90Wt%. , stirred and reacted at a temperature of 40°C for 8 hours, after the reaction was completed, the product was recrystallized and purified to obtain a silicon-containing compound containing a urea group. The product was characterized as the target product by FT-IR, NMR, DSC and other methods.

[0055] (2) dissolving the silicon-containing compound containing urea groups obtained in step (1) in tetrahydrofuran to prepare a solution with a concentration of 3M, and adding glacial acetic acid as a catalyst, the amount of glacial acetic acid being a catalytic amount; leave standstill for 8 hours Finally, a silicon-containing compound solution containing urea groups is obtained for subsequent use;

[0056] (3) Soak the dried polyvinylidene fluoride (PVDF) microporous plate support la...

Embodiment 3

[0059] (1) γ-aminopropyl trimethoxysilane and phenyl isocyanate are mixed in a three-necked flask in a molar ratio of 1:1, and xylene is added thereto so that the content of xylene is 85Wt%. The reaction was stirred and reacted at 60°C for 8 hours. After the reaction was completed, the product was recrystallized and purified to obtain a silicon-containing compound containing a urea group. The product was characterized as the target product by FT-IR, NMR, DSC and other methods.

[0060] (2) the silicon-containing compound that contains urea group that step (1) obtains is dissolved in dichloromethane and is mixed with the solution that concentration is 2.4M, and adds the concentrated hydrochloric acid (mass concentration is 37%) as catalyzer, the concentration of concentrated hydrochloric acid The amount added is a catalytic amount; after standing for 8 hours, a silicon-containing compound solution containing urea groups is obtained, which is set aside;

[0061] (3) Soak the dr...

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Abstract

The invention belongs to the field of functional polymer materials, in particular to a functional composite membrane capable of recognizing alkali metal ions and a preparation method thereof. The functional composite membrane provided by the invention is prepared by coating a carbamido-containing silicon compound capable of carrying out molecular self-assembly to form an ionic channel on the surface of a microporous planar supporting layer or blending a carbamido-containing silicon compound capable of carrying out molecular self-assembly to form an ionic channel with a polymer forming a microporous supporting layer. The compact-surface composite membrane comprises the microporous planar supporting layer and a surface-coated compact layer of the carbamido-containing silicon compound or comprises the compact layer and the microporous supporting layer, wherein the compact layer with the carbamido-containing silicon compound on the surface is prepared by blending the carbamido-containing silicon compound and the polymer forming the microporous supporting layer. The compact layer of the carbamido-containing silicon compound contains crosslinked siloxane network cation channels so as torealize the recognition and the transmission of the functional membrane to alkali metal ions.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, in particular to a functional composite membrane capable of recognizing alkali metal ions and a preparation method thereof. Background technique [0002] In today's world where energy and water resources are in short supply, and water and environmental pollution are becoming more and more serious, the research on membrane separation science and technology has been highly valued by countries all over the world, and has become the main component of the supporting technology for sustainable economic development strategies. So far, although membrane science and technology have been greatly developed, the permeability of traditional functional membranes is basically independent of environmental factors, while there are many smart membranes with environmental response behavior in nature. Smart film refers to a new type of film that can perceive and accept information from the external enviro...

Claims

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Application Information

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IPC IPC(8): B01D71/70B01D69/12B01D69/10B01D69/06C02F1/44
Inventor 王丽华张信信贠延滨刘必前
Owner INST OF CHEM CHINESE ACAD OF SCI
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