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Polyvinylidene fluoride nanometer composite super low pressure ultrafiltering membrane and preparation method thereof

A technology of polyvinylidene fluoride and nanocomposite, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high operating costs, poor hydrophilicity, low surface energy, etc., to improve processing capacity, The effect of reducing power consumption and solving membrane fouling

Inactive Publication Date: 2008-04-23
HARBIN INST OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of existing PVDF membrane materials such as poor hydrophilicity, low surface energy, easy pollution, high operating costs and existing modification methods that are difficult to operate under ultra-low pressure (<0.05MPa); Provided is a polyvinylidene fluoride nanocomposite ultra-low pressure ultrafiltration membrane and a preparation method thereof

Method used

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specific Embodiment approach 1

[0009] Specific embodiment one: The polyvinylidene fluoride nanocomposite ultra-low pressure ultrafiltration membrane of this embodiment consists of 20-150 parts by weight of PVDF, 0.1-20 parts of nano-powder, 10-1000 parts of dispersion medium, 10 ~50 parts of organic additives and 0.1~30 parts of inorganic additives.

specific Embodiment approach 2

[0010] Specific embodiment two: The polyvinylidene fluoride nanocomposite ultra-low pressure ultrafiltration membrane of this embodiment consists of 30-130 parts by weight of PVDF, 0.3-18 parts of nano-powder, 15-900 parts of dispersion medium, 20 ~40 parts of organic additives and 0.3~28 parts of inorganic additives are prepared:.

specific Embodiment approach 3

[0011] Specific embodiment three: The polyvinylidene fluoride nanocomposite ultra-low pressure ultrafiltration membrane of the present embodiment consists of 100 parts of PVDF, 10 parts of nano powder, 500 parts of dispersion medium, 30 parts of organic additives and 10 parts by weight. parts of inorganic additives.

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Abstract

The present invention relates to a polyvinylidene fluoride nano composite super low pressure ultrafiltration membrane and its preparation method. The invented product is made up by using (by weight portion) 20-150 portions of PVDF, 0.1-20 portions of nano powder body, 10-1000 portions of dispersion medium, 10-50 portions of organic additive and 0.1-30 portions of inorganic additive. Is preparation method includes the following steps: making nano powder body, inorganic additive, organic additive and PVDF be successively added into the dispersion medium, dissolving for 3-48hr, standing still and defoaming for 5-24h to obtain membrane-moulding liquor, can make it into plate membrane, tubular membrane or hollow fibre membrane and correspondent membrane component.

Description

technical field [0001] The invention relates to a nanocomposite membrane and a preparation method thereof, in particular to a nanocomposite membrane used for ultra-low pressure operation in water treatment and chemical separation processes and a preparation method thereof. Background technique [0002] Membrane treatment technology is the preferred technology for drinking water treatment in the 21st century. Compared with conventional water treatment technology, it has the advantages of low energy consumption, high separation efficiency, simple process, no need to add additives, and no impact on human health. However, due to concentration polarization The existence of problems such as membrane fouling and other problems lead to the decline of permeation flux with the extension of operation time; a large amount of energy consumption in the operation process is used for the recirculation of raw material liquid to control concentration polarization and membrane fouling, which se...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D71/02B01D69/12
Inventor 马军马玉新秦文跃
Owner HARBIN INST OF TECH
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