Sugar-containing polymer compound film with blocked pore and preparation thereof

A composite membrane and polymer technology, applied in the field of membrane separation, can solve the problems of no preparation method and practical application, poor mechanical properties of sugar-containing polymers, failure to maintain integrity, etc., achieve good practical value, and solve compatibility problems , good mechanical strength

Inactive Publication Date: 2008-11-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the synthesis technology of sugar-containing polymers has been extensively studied [Ladmiral, V., E.Melia, et al. "Syntheticglycopolymers: an overview" European Polymer Journal 2004, 40(3): 431-449; Meng Jianwen Tan Yebang, etc. . "Synthesis of sugar-containing polymers" Polymer Bulletin 2002, (5): 66-72.], but the mechanical properties of a single sugar-containing polymer are poor, film formation is difficult, and its integrity cannot be maintained under pervaporation operating conditions , and it is easy to swell under the action of water molecules and lose its separation performance
Therefore, there are no related reports on the application of sugar-containing polymers to pervaporation dehydration membranes, and there are no specific preparation methods and practical applications that can be implemented.

Method used

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  • Sugar-containing polymer compound film with blocked pore and preparation thereof
  • Sugar-containing polymer compound film with blocked pore and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Methanol and water were prepared as a mixed solvent at a volume ratio of 1:4, and 3 grams of AG, 2 milliliters of AA, 0.25 grams of MBA, and 0.005 grams of AIBN were dissolved in a mixed solvent with a volume of 5 milliliters. Soak a PP microporous membrane with a thickness of 50 microns, an average pore diameter of 0.2 microns, a porosity of 85%, and an area of ​​16 square centimeters in the above solution for 60 minutes, and remove the residual solution on the surface with filter paper after taking it out. Polymerization was thermally initiated at 60° C. for 24 hours, under nitrogen protection during the process. After the polymerization reaction was completed, the membrane was taken out, washed with deionized water and ethanol in turn, and dried. The obtained sugar-containing polymer plugging composite membrane was subjected to isopropanol dehydration pervaporation experiment, and the operating parameters and test results are shown in Table 1.

Embodiment 2

[0034] Methanol and water were prepared as a mixed solvent at a volume ratio of 4:1, and 0.5 g of GAMA, 4.5 g of AAm, 1 g of MBA, and 0.25 g of AIBN were respectively taken and dissolved in a mixed solvent with a volume of 5 ml. Soak a PE microporous membrane with a thickness of 15 microns, an average pore diameter of 0.2 microns, a porosity of 20%, and an area of ​​16 square centimeters in the above solution for 30 minutes, and remove the residual solution on the surface with filter paper after taking it out. Polymerization was thermally initiated at 60° C. for 6 hours, under nitrogen protection during the process. After the polymerization reaction was completed, the membrane was taken out, washed with deionized water and ethanol in turn, and dried. The obtained sugar-containing polymer plugging composite membrane was subjected to isopropanol dehydration pervaporation experiment, and the operating parameters and test results are shown in Table 1.

Embodiment 3

[0036] Methanol and water were prepared as a mixed solvent at a volume ratio of 1:1, and 3 grams of AAEL, 2 milliliters of MAA, 0.25 grams of MBA, and 0.005 grams of AIBN were taken respectively and dissolved in a mixed solvent with a volume of 5 milliliters. Soak a PTFE microporous membrane with a thickness of 500 microns, an average pore diameter of 1 micron, a porosity of 60%, and an area of ​​16 square centimeters in the above solution for 30 minutes, and remove the residual solution on the surface with filter paper after taking it out. Polymerization was thermally initiated at 80° C. for 24 hours, under nitrogen protection during the process. After the polymerization reaction was completed, the membrane was taken out, washed with deionized water and ethanol in turn, and dried. The obtained sugar-containing polymer plugging composite membrane was subjected to ethanol dehydration pervaporation experiment, and the operating parameters and test results are shown in Table 1. ...

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Abstract

The present invention discloses a production method of sugar-containing polymer hole-blocking compound membrane and the application in permeation vaporization and dehydration of organic solvent. The said method comprises the following steps: mixing sugar-contained monomer, comonomer, cross linker, evocating agent and solvent to formulate polymerized solution; performing in-situ polymerization by adopting photo-initiation or thermal initiation mode after the polypropylene microporous membrane is immersed in polymerization solution for a special time; getting sugar-contained polymer hole-blocking compound membrane after cleaning and drying. The sugar-containing polymer hole-blocking compound membrane prepared by the invention can be used for organic solvent dehydration, has advantages of high separation factor, large separation flux, good mechanical properties, good chemical stability and thermostability, and has utility value in separation and purification of organic solvent.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a preparation method of a sugar-containing polymer plugging composite membrane used for pervaporation dehydration. Background technique [0002] Pervaporation dehydration is an emerging organic solvent purification technology, which has the advantages of no pollution, low energy consumption, and simple process. It is irreplaceable in the purification of organic solvents, especially those with water content close to the azeotropic point or thermally unstable status. Since the 1980s, pervaporation dehydration has achieved industrial applications in ethanol, isopropanol, acetone, etc., bringing good economic and social benefits. [0003] According to the dissolution-diffusion mechanism, the performance of pervaporation dehydration membranes largely depends on the hydrophilicity of membrane materials. Polyols contain a large number of hydroxyl groups and are highly hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/08
Inventor 徐志康代正伟万灵书
Owner ZHEJIANG UNIV
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