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Preparation method of alcohol-permselective SiO2/PVDF hybrid membrane

A technology that preferentially penetrates alcohol and hybrid membranes. It is applied in chemical instruments and methods, semi-permeable membrane separation, and membranes. It can solve the problems of small improvement and difficulty in meeting application requirements, and achieve the goal of balancing ability and improving hydrophobicity. Effect

Active Publication Date: 2020-08-25
杨笃云
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  • Abstract
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AI Technical Summary

Problems solved by technology

The polyvinylidene fluoride membrane is a common pervaporation preferential alcohol permeation membrane material, which has the advantages of relatively low price, easy film formation, stable chemical properties, good heat resistance, anti-pollution, and strong hydrophobicity. Potential pervaporation membrane materials, but in the application process, it is found that its flux and selectivity are difficult to meet the actual application requirements
[0004] In order to improve this situation, in the prior art, inorganic particles, such as zeolite, silica, MOF materials, etc., are blended with polymers to prepare hybrid membranes, which achieve a dual flux and selectivity within a certain range. increase, but not by much

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0021] (a) Mix an appropriate amount of silica solid particles and silica mesoporous particles to obtain silica mixed particles, which are calcined at a high temperature at 200°C, wherein the silica solid particles and silica The mass ratio of silicon mesoporous particles is 3:1;

[0022] (b) Add the silica mixed particles in step (a) to the solvent n-hexane with a mass ratio of 15% of the silane coupling agent KH-560, and react for 2 hours under ultrasonic stirring to obtain the modified silica Silicon mixed particles;

[0023] (c) Evenly mix PVDF, modified silica inorganic particles, porogen polyethylene glycol and dimethylacetamide, age at 80°C for 12h, and stand at 100°C for defoaming Obtain the casting solution, wherein the mass ratio of PVDF, modified silica inorganic particles, porogen polyethylene glycol and dimethylacetamide in the casting solution is 10:3:2.5:100;

[0024] (d) Evenly scrape and coat the casting solution on the non-woven fabric, and place it in the ...

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PUM

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Abstract

The invention provides a preparation method of an alcohol-permselective SiO2 / PVDF hybrid membrane. The alcohol-permselective SiO2 / PVDF hybrid membrane is prepared by mixing silicon dioxide solid particles and silicon dioxide mesoporous particles, carrying out hydrophobic modification by using a silane coupling agent and then adding the mixture into a PVDF membrane casting solution for phase inversion. Compared with a membrane singly adopting silicon dioxide nano solid particles or silicon dioxide mesoporous particles, the flux of the prepared membrane is increased by 50% or above.

Description

technical field [0001] The invention relates to a preparation method of a film material, in particular to a SiO film which is preferentially permeable to alcohol 2 / PVDF hybrid membrane preparation method. Background technique [0002] As a green, efficient and renewable new energy source, bioethanol has been highly valued by countries all over the world. Due to product inhibition, the traditional fermentation process only obtains a dilute ethanol solution with an extremely low concentration, which needs to be removed from the fermentation broth in time. Among the existing ethanol dehydration technologies, pervaporation is a new type of membrane separation technology, which has the advantages of high efficiency, energy saving, and environmental protection. Alcohol-preferred pervaporation membrane and fermentation coupling technology have been adopted in the prior art, which can remove ethanol and butanol in the fermentation broth in situ in real time, thereby improving the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D67/00
CPCB01D67/0079B01D71/34B01D2325/38
Inventor 穆效平
Owner 杨笃云
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