Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-oil pollution resistant oil/water separation membrane and preparation method thereof

An oil-water separation membrane and oil pollution technology, which is applied in the field of membrane separation, can solve the problems of inability to remove the surface adsorption layer and decrease in permeation flux, and achieve the effects of large-scale production, high-efficiency treatment, and good oil pollution resistance

Active Publication Date: 2015-05-13
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrophobic nature of the material itself, even if the initial flux of the polyvinylidene fluoride membrane material is high, it will absorb a layer of hydrophobic substances during use, resulting in a decrease in the permeation flux, and the binding force between these substances and the membrane It is relatively strong, and the surface adsorption layer cannot be removed by backwashing for a short time

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

Embodiment 1

[0051] In this embodiment, a method for preparing a hollow fiber membrane with high resistance to oil pollution and oil-water separation comprises the following steps:

[0052] (1) Mix polyvinylidene fluoride and solvent—N,N-dimethylacetamide, additives—polyethylene glycol and glycerin at a mass ratio of 15:62:15:8 at 120°C and dissolve , defoaming to obtain a mixed solution;

[0053] (2) The mixed solution is spun through hollow fiber spinning equipment, the core liquid is an aqueous solution of glycerol with a mass fraction of 30% in the spinning process, the air gap is 15-20 cm, and the coagulation bath is continuously solidified by ethanol coagulation bath-water coagulation bath, hollow The fiber membrane collection speed is 45-50m / min; the spun hollow fiber membrane is obtained;

[0054] (3) Soak the spun hollow fiber membrane in 0.1% v / v acetic acid-0.1% w / v NaCl solution and dry it at room temperature to obtain polyvinylidene fluoride membrane filament a.

[0055] Aft...

Embodiment 2

[0057] In this embodiment, a method for preparing a highly oil-pollution-resistant oil-water separation membrane comprises the following steps:

[0058] (1) Stir polyvinylidene fluoride, solvent—N,N-dimethylacetamide, additive—polyethylene glycol and polyvinylpyrrolidone at 50°C in a mass ratio of 13:65:13:10 Dissolving and defoaming to obtain a mixed solution;

[0059] (2) Use the glass plate as the base to scrape a flat film on a flat film scraping machine, then immediately transfer it to a water steam bath, and transfer it to a water bath after 2 minutes to solidify and form a film.

[0060] (3) Soak the spun hollow fiber membrane in 0.1% v / v acetic acid-3% w / v glycerin aqueous solution, and then dry it at room temperature to obtain a flat polyvinylidene fluoride membrane b. After testing: the polyvinylidene fluoride membrane b prepared in this example has a thickness of 200 μm, select a defect-free polyvinylidene fluoride membrane, cut it into a certain shape and install ...

Embodiment 3

[0062] In this embodiment, a method for preparing a hollow fiber membrane with high resistance to oil pollution and oil-water separation comprises the following steps:

[0063] (1) Mix polyvinylidene fluoride and solvent - dimethyl formamide, additive - polymethyl methacrylate and ethanol at 120°C in a mass ratio of 10:70:8:8, dissolve, Degassing to obtain a mixed solution;

[0064] (2) The mixed solution is spun through hollow fiber spinning equipment, the core liquid is an aqueous glycerin solution with a mass fraction of 25% in the spinning process, the air gap is 10-15cm, and the coagulation bath is continuously solidified by ethanol coagulation bath-water coagulation bath, hollow The fiber membrane collection speed is 40-45m / min; the spun hollow fiber membrane is obtained;

[0065] (3) Soak the spun hollow fiber membrane in 0.1% v / v acetic acid-0.1% w / v NaCl solution and dry it at room temperature to obtain polyvinylidene fluoride membrane filament c.

[0066] See Examp...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-oil pollution resistant oil / water separation membrane and a preparation method thereof, the preparation method is as follows: polyvinylidene fluoride, a solvent and an additive are mixed at 50 to 150 DEG C, and dissolved to obtain a mixed solution; the weight ratio of polyvinylidene fluoride to solvent to additive is 10-20:60-70:15-30; the mixed solution is squeezed out by membrane making equipment, nonsolvent-induced phase separation is used for curing and membrane forming and rinsing, before or after the rinsing, a chemical solution is used for aftertreatment, and the membrane is dried in the air at room temperature. The method is simple and feasible, is convenient for industrialized mass production; the prepared oil / water separation membrane is large in flux, and has good stability and oil pollution resistance to achieve efficient processing of kitchen garbage waste water and residual oil deep recovery.

Description

technical field [0001] The invention relates to the field of membrane separation, in particular to an oil-water separation membrane with high oil pollution resistance and a preparation method thereof. Background technique [0002] With the increase of population, the burden of urban living environment is increasing, and the problem of resource scarcity is obviously prominent. How to improve resource utilization efficiency and reduce energy consumption is a topic worthy of in-depth study. Kitchen waste is the main part of urban domestic waste. Its main components include organic matter such as starchy food, plant fiber, animal protein, and fat. Vehicle transportation and other characteristics. Food waste mainly comes from food processing leftovers (kitchen waste) and food residues (swill) produced by the catering service industry, canteens of enterprises and institutions, and households. With the rapid development of our country's economy and the gradual acceleration of ur...

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): B01D71/32B01D69/02B01D67/00B01D17/022
Inventor 雷晶涂凯陈顺权
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com