Hydrophilic polyethylene microporous membrane and preparation method thereof

A polyethylene microporous membrane, hydrophilic technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of inability to be wetted, non-wetting by liquid, cumbersome and other problems

Active Publication Date: 2020-12-08
WUXI ENERGY NEW MATERIALS TECH CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strong hydrophobicity of polyethylene itself makes it non-wetting to liquids in the water treatment process, and there is a bottleneck that cannot be wetted, so it is greatly restricted in the application process of water treatment
Although the polyethylene material can be pre-wetted by adding methanol, ethanol and other low surface tension organic solvents, and then remove the solvent for use, but this method is too cumbersome and not suitable for long-term large-scale use

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
  • Hydrophilic polyethylene microporous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0034] Wet the polyethylene microporous membrane with DMAC, use a solution composed of 1% PVA, 1% glutaraldehyde and water to coat the polyethylene microporous membrane after the first step of DMAC wetting treatment, let it stand at room temperature for 2 minutes, and then heat it at 70°C Joint treatment for 10 minutes, the other side of the polyethylene microporous membrane after the first surface coating and heat crosslinking treatment is evenly coated with a solution composed of PVA1%, glutaraldehyde 1% and water for the second time, and stand at room temperature for 2min Afterwards, heat at 70°C for 10 minutes of cross-linking treatment, soak in water for 12 hours, dry, and set aside. The obtained contact angle is 35° and the pure water flux is 500L / m 2 h bar hydrophilic modified polyethylene microporous flat membrane.

[0035] The membranes prepared in Example 1 were stored in normal temperature water and low temperature water (5°C) respectively. The contact angles of th...

Embodiment example 2

[0037] Wet the polyethylene microporous membrane with DMAC, use a solution composed of PVA1%, glutaraldehyde 10%, DMAC70% and water to coat the polyethylene microporous membrane after the first step of DMAC wetting treatment, and heat it after standing at room temperature for 2 minutes Cross-linking treatment at 80°C for 5 minutes, the other side of the polyethylene microporous membrane after the first coating and thermal cross-linking treatment was evenly coated with a solution composed of 1% PVA, 1% glutaraldehyde and water for the second time, at room temperature After standing still for 2 minutes, heat at 80°C for 5 minutes for cross-linking treatment, put the cross-linked polyethylene microporous membrane into water for 12 hours, dry it, and set it aside. The obtained contact angle is 40° and the pure water flux is 200L / m 2 h bar hydrophilic modified polyethylene microporous flat membrane.

Embodiment example 3

[0039]Wet the polyethylene microporous membrane with DMAC, use a solution composed of 5% PEI, 10% glutaraldehyde and water to coat the polyethylene microporous membrane after the first step of DMAC wetting treatment, let it stand at room temperature for 5 minutes, and then heat it to 60°C After cross-linking treatment for 10 minutes, the other side of the polyethylene microporous membrane after the first surface coating and thermal cross-linking treatment was evenly coated with a solution composed of PEI%, glutaraldehyde 1% and water for the second time, and stood at room temperature After 2 minutes, heat at 60°C for 10 minutes for cross-linking treatment, soak the cross-linked polyethylene microporous membrane in water for 6 hours, dry, and set aside. The obtained contact angle is 45° and the pure water flux is 190L / m 2 h bar surface hydrophilic modified polyethylene microporous flat membrane.

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
contact angleaaaaaaaaaa
Login to view more

Abstract

The invention relates to a hydrophilic polyethylene microporous membrane and a preparation method thereof. The preparation method comprises the following specific steps: 1, wetting the polyethylene microporous membrane with a wetting agent; 2, uniformly coating the polyethylene microporous membrane wetted in the step 1 with a solution consisting of a hydrophilic substance, a cross-linking agent and a solvent; 3, standing at room temperature, and then heating for heat treatment; 4, taking out the membrane subjected to heat treatment on the first surface, and uniformly coating the other surfaceof the polyethylene microporous membrane with a solution consisting of a hydrophilic substance, a cross-linking agent and a solvent; step 5, standing at room temperature, then carrying out heating heat treatment, putting the polyethylene microporous membrane treated in the step 5 into water, soaking for 6-12 hours, and drying for later use. The hydrophilic polyethylene microporous membrane is obtained. Complete hydrophilic modification of the polyethylene microporous membrane is achieved, and the hydrophilic performance of the polyethylene microporous membrane has the advantage of being permanently effective. Moreover, the method has low requirements on equipment, is simple, feasible, energy-saving and environment-friendly, and is suitable for large-scale production of the hydrophilic polyethylene microporous membrane .

Description

technical field [0001] The invention relates to the technical field of polyethylene microporous membrane production, in particular to a hydrophilic polyethylene microporous membrane and a preparation method thereof. Background technique [0002] Polymer materials have attracted widespread attention due to their wide molecular weight distribution, light weight, low density, excellent mechanical properties, insulating properties, and variable structures. However, surface and interface problems, especially surface wettability, limit the wide application of polymer materials. In order to meet the needs of the material, it is necessary to modify the wettability of the surface of the polymer material. Polyethylene membrane has good thermal stability, chemical stability and mechanical properties. Compared with commonly used membrane materials such as polyvinylidene fluoride, polysulfone, polyethersulfone and polyimide, polyethylene has the characteristics of low price. However, t...

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): B01D69/02B01D71/26B01D67/00
CPCB01D69/02B01D71/26B01D67/0088B01D2325/36
Inventor 程跃邱长泉
Owner WUXI ENERGY NEW MATERIALS TECH CO LTD
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