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

Preparation method and application of high-molecular forward osmosis membrane

A forward osmosis membrane and polymer membrane technology, applied in the field of polymer forward osmosis membrane preparation, can solve the problems of small water flux, low salt retention rate, poor permeability, etc., and achieve high water flux and salt retention rate. High and hydrophilic effect

Inactive Publication Date: 2014-11-19
WUHAN UNIV
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, low water flux, low salt rejection rate, and poor selectivity are the main factors that limit the industrial application of polymer forward osmosis membranes.

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 and application of high-molecular forward osmosis membrane
  • Preparation method and application of high-molecular forward osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Mix 52g of 1,4-dioxane and 18g of acetone evenly to form a mixed solvent, then add 15g of cellulose acetate and stir until dissolved, then add 8g of methanol and 7g of lactic acid in sequence, and finally add 1g of carbon nanotubes, Stir mechanically at 30°C, and after fully dissolving, it becomes a transparent and clear solution, and the casting liquid is obtained;

[0031] (2) After ultrasonic defoaming of the casting solution for 2 hours, scrape the film in a vacuum drying oven at 30°C, and volatilize the solvent in a vacuum drying oven at 30°C for 60 seconds;

[0032] (3) Immerse the gel in deionized water to form a film, wash it with deionized water, and dry it in a vacuum oven for 24 hours to obtain a polymer forward osmosis membrane (finished membrane).

[0033] The contact angle of the polymer forward osmosis membrane was measured with a DSA100 contact angle meter from Kruss, Germany, to evaluate the surface hydrophilicity of the polymer forward osmosis memb...

Embodiment 2

[0038] (1) Add 20g of cellulose acetate to the mixed solvent mixed with 60g of N,N-dimethylformamide and 10g of acetone to dissolve completely, then add 8g of methanol and 7g of lactic acid in turn, and finally add 2g of nano silicon dioxide, Stir mechanically at 30°C, and after fully dissolving, it becomes a transparent and clear solution, and the casting solution is obtained;

[0039] (2) After ultrasonically degassing the casting solution for 2 hours, scrape the film in a vacuum drying oven at 30°C, and volatilize the solvent for 30s at 30°C;

[0040] (3) Immerse the gel in deionized water to form a film, wash it with deionized water, and dry it in a vacuum oven for 24 hours to obtain a polymer forward osmosis membrane (finished membrane).

[0041] The performance of the polymer forward osmosis membrane was tested according to the test method in Example 1, and the contact angle of the polymer forward osmosis membrane obtained finally was 56.5°, the porosity was 70.01%, and ...

Embodiment 3

[0043](1) Add 15g of cellulose acetate to a mixed solvent made of 52g of 1,4-dioxane and 18g of acetone, then add 5g of methanol and 10g of triethyl phosphate in turn, and finally add 2g of nanometer titanium dioxide. Mechanical stirring, fully dissolved into a transparent clear solution;

[0044] (2) After ultrasonic defoaming of the casting solution for 2 hours, scrape the film in a vacuum drying oven at 30°C, and volatilize the solvent at 30°C for 60s;

[0045] (3) Immerse the gel in deionized water to form a film, soak the residual solvent in deionized water at room temperature, wash the obtained polymer film with deionized water, and dry it in a vacuum drying oven for 24 hours to obtain the polymer film. Forward osmosis membrane (finished membrane).

[0046] According to the test method in Example 1, the performance of the polymer forward osmosis membrane is tested, and the final obtained polymer forward osmosis membrane has a contact angle of 63.6°, a porosity of 67.35%...

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
Water fluxaaaaaaaaaa
Contact angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method and an application of a high-molecular forward osmosis membrane, and belongs to the wastewater treatment field. The preparation method of the high-molecular forward osmosis membrane comprises the following steps: 1, adding formula contents of a high-molecular membrane material, a pore forming agent and a modifier to a formula amount of a solvent, controlling the temperature at 30DEG C, and stirring until complete dissolving in order to obtain a membrane casting liquid; 2, carrying out ultrasonic deaeration on the membrane casting liquid obtained in step 1, and carrying out knifing and volatilizing treatment in a 30DEG C vacuum drying box; and 3, immersing in deionized water to carry out immersion gel film formation, washing, and carrying out vacuum drying to obtain the high-molecular forward osmosis membrane. The high-molecular forward osmosis membrane prepared through the method has the advantages of large water flux, high salt retention rate and good selective permeability in the forward osmosis process, is a membrane required by industrial wastewater treatment; and the preparation method has the advantages of simplicity, easy implementation, low cost of raw materials, and large commercial application prospect.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a preparation method and application of a polymer forward osmosis membrane. technical background [0002] Industrial wastewater refers to the wastewater, sewage and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products, products and pollutants produced in the production process lost with water. With the rapid development of industry, the types and quantities of wastewater have increased rapidly, and the pollution of water bodies has become more and more extensive and serious, which has threatened human health and safety. Therefore, it is very necessary to treat industrial wastewater timely and effectively so that it can meet discharge standards or be recycled. [0003] Membrane separation technology is a new technology developed in the past forty years, and it has been widely used in in...

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): B01D71/06B01D67/00B01D69/02B01D61/00C02F1/44
Inventor 于萍金海洋罗运柏
Owner WUHAN UNIV
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