Polymetafluoroethylene/organic clay nanometer composite ultra-low pressure ultrafiltering membrane and its preparation method

A technology of polyvinylidene fluoride and organic clay, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor hydrophilicity of polyvinylidene fluoride, high operating costs, and low surface energy, and achieve Improve processing capacity, reduce power consumption, and change the effect of hydrophilicity

Inactive Publication Date: 2007-10-17
HARBIN INST OF TECH
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing polyvinylidene fluoride (abbreviated as PVDF) membrane material with poor hydrophilicity, low surface energy, and easy pollution. Operation, the problem of high operating costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0009] Specific embodiment 1: In this embodiment, a polyvinylidene fluoride / organoclay nanocomposite ultra-low pressure ultrafiltration membrane consists of: polyvinylidene fluoride (referred to as PVDF): 20 to 150 parts, organoclay: 0.1 ~20 parts, dispersion medium: 10~1000 parts, organic additive: 10~50 parts and inorganic additive: 0.1~30 parts.

specific Embodiment approach 2

[0010] Specific embodiment 2: In this embodiment, a polyvinylidene fluoride / organic clay nanocomposite ultra-low pressure ultrafiltration membrane consists of: PVDF: 30-130 parts, organoclay: 0.3-18 parts, dispersion medium: 15 ~900 parts, organic additives: 20~40 parts and organic additives: 0.3~28 parts.

specific Embodiment approach 3

[0011] Specific embodiment three: In this embodiment, a polyvinylidene fluoride / organoclay nanocomposite ultra-low pressure ultrafiltration membrane consists of: PVDF: 100 parts, organoclay: 10 parts, dispersion medium: 500 parts, organic additives : 30 parts and inorganic additives: 10 parts.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a polyvinylidene fluoride/organic clay nano composite ultralow pressure ultrafiltration membrane and a preparation method thereof, and to a nano composite membrane and a preparation method thereof. The invention resolves the problem that the existing membrane material has a bad hydrophilicity and a low surface energy and is easily be polluted, and the existing modified method has the disadvantage that it can not run under ultralow pressure and the running cost is high. It is composed of 20-50 shares by weight of PVDF, 0.1-20 shares by weight of organic clay, 10-1000 shares by weight of disperse medium, 10-50 shares by weight of organic addition agent and 0.1-30 shares by weight of inorganic additive. The invention adds the organic clay, inorganic additive, organic addition agent and PVDF in turns into the disperse medium to get the casting film liquor after 3-48 hours dissolution and 5-24 hours stewing deaeration; plate membrane, tubular type membrane, hollow fibre membrane, and comparable membrane module can be prepared. The invention can change the hydrophilicity of the composite membrane, resolve the pollution of exiting membrane effectively, increase the water flux and retain ratio, extend the washing period, raise the treating capacity, and realize the large scale use and run in ultralow pressure.

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 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34
Inventor 马玉新马军秦文跃
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap