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

Preparation method of enhanced flat composite microporous membrane for improving hydrophility

A microporous membrane and enhanced technology, which is applied in the field of preparation of enhanced flat composite microporous membrane, can solve the problems of weak interfacial bonding force of flat composite membrane, easy breaking and falling off of membrane functional layer, insufficient mechanical strength, etc., and achieve strong interface Combining force and anti-backwashing ability, improving anti-backwashing ability, good repeatability

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the support layer used in flat composite membranes is mostly non-woven fabrics (such as polyester non-woven fabrics, etc.), and the non-woven fabrics are mainly polymer fibers (such as polyester fibers, polyolefin fibers, etc.). The compatibility of polymers and polysulfone compounds is not good, the interface bonding force of the prepared flat composite membrane is weak, the mechanical strength is not enough, and the membrane functional layer is easy to break and fall off during backwashing

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of enhanced flat composite microporous membrane for improving hydrophility
  • Preparation method of enhanced flat composite microporous membrane for improving hydrophility
  • Preparation method of enhanced flat composite microporous membrane for improving hydrophility

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment ）

[0045] The total mass percentage of polymer film material P1 and polymethyl methacrylate P2 in the casting solution is 12-25% (increasing or decreasing by 1% within the value range can be used as an optional specific embodiment), And in terms of weighing percentage, P2 / P1=0.05~0.25 (in the value range, every increment or decrement of 0.01 can be used as an optional specific embodiment), and the mass percentage of water-soluble polymer additive is 2~12% ( Every increase or decrease by 1% within the value range can be used as an optional specific embodiment), the mass percentage of inorganic salt is 1-5% (every increase or decrease by 1% within the value range can be used as an optional Selected specific embodiment), the mass percentage of organic solvent is 58 ~ 85% (in the value range, every increment or decrement by 1% can be used as an optional specific embodiment);

[0046] The polymer membrane material is any one of polyethersulfone, polysulfone, phthalazine polyethersulfo...

Embodiment 1

[0061] Fully dissolve polymethyl methacrylate with a mass percentage of 8% in N-methylpyrrolidone (NMP), filter and defoam to prepare a coating solution for a scraping film;

[0062] Dissolve 15% polyethersulfone, 3% polymethyl methacrylate, 6% polyvinylpyrrolidone, 4% polyethylene glycol, and 2% lithium chloride in 70% N- In methylpyrrolidone (NMP) organic solvent, stir at 60°C for 48 hours until the polymer is completely dissolved, mix thoroughly to make a uniform casting solution, filter, vacuumize and defoam, and then stand for use.

[0063] At an ambient temperature of 28°C, install the non-woven fabric 5 on the film scraping machine, control the cloth running speed controller 7 so that the non-woven cloth running speed is 0.8m / min, adjust the scraper 4 and the non-woven fabric that acts as a supporting layer The distance between 5 is 20 μm, and the coating solution with a temperature of 28 ° C is scraped and coated on the non-woven fabric through the material tank 1, the...

Embodiment 2

[0068] Fully dissolve polymethyl methacrylate with a mass percentage of 12% in the organic solvent N-methylpyrrolidone (NMP), filter and defoam to prepare a coating solution for a scraping film;

[0069] Dissolve 10% polysulfone, 2% polymethyl methacrylate, 7% polyvinylpyrrolidone, 2% polyethylene glycol, and 1% lithium chloride into 78% N-methyl chloride by mass percentage. Pyrrolidone (NMP) organic solvent, stirred at 60°C for 36 hours until the polymer was completely dissolved, mixed thoroughly to make a uniform casting solution, filtered, vacuumed and defoamed, and then left to stand for use.

[0070]At an ambient temperature of 28°C, install the non-woven fabric 5 on the film scraping machine, control the cloth running speed controller 7 so that the non-woven cloth running speed is 0.8m / min, adjust the scraper 4 and the non-woven fabric that acts as a supporting layer The distance between 5 is 20 μm, and the coating solution with a temperature of 27 ° C is scraped onto th...

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
Glass transition temperatureaaaaaaaaaa
Contact angleaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of an enhanced flat composite microporous membrane for improving hydrophility, and aims to provide a preparation method of a membrane which is used for water treatment technology field, has good hydrophilicity and has a function layer not easy to peel in the using process. The preparation method mainly comprises the following steps: firstly, non-woven fabric used as a supporting layer and a polymer capable of being well combined with a membrane preparation material are prepared into a dilute solution, the dilute solution is poured into a membrane scraping machine material groove, and enters into a knife edge groove via a metering pump, walking speed is controlled, a scraper is used for membrane scraping and coating on the non-woven fabric; the membrane preparation material and an additive are dissolved in an organic solvent for preparation of a membrane casting solution, the firstly scraped non-woven fabric is scraped secondarily and coated by a membrane scraping machine, then is dipped in a coagulation bath for solution phase inversion to obtain the flat composite microporous membrane, the prepared flat composite microporous membrane has the advantage of being good in hydrophility, not easy to be polluted, large in flux, low in cost, strong in interface bonding force, and the preparation method is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of material science and environmental protection, relates to a polymer membrane used for sewage recycling (abbreviated as reuse) and a manufacturing method thereof, and more specifically relates to an enhanced flat composite microporous membrane with improved hydrophilicity Preparation. Background technique [0002] With the advancement of petrochemical technology, the sources of wastewater pollutants in petrochemical enterprises are more complex. In addition to the main production materials, there are also a large number of additives, catalysts, intermediate products and by-products. The treatment of these complex pollutants is a very difficult problem for petrochemical enterprises. In the membrane sewage recovery and utilization device, these pollutant components are likely to cause membrane fouling, membrane breakage or damage to the separation layer, resulting in an irreversible decline in the quality of the memb...

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
IPC IPC(8): B01D69/12B01D71/68B01D71/66B01D71/34B01D67/00
Inventor 杨丽魏昕杨永强
Owner CHINA PETROLEUM & CHEM CORP
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