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

A preparation method of forward osmosis emergency drinking water bag based on layer-by-layer self-assembly method

A layer-by-layer self-assembly and forward osmosis technology, applied in the field of environmental engineering, can solve problems such as unenvironmental organic solvents and residues, and achieve the effects of abundant film-forming materials, improved separation performance, and flexible and simple operation.

Active Publication Date: 2022-01-28
CHANGCHUN UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water bag can only regulate the water purification rate through the concentration of the draw solution, and dimethylamide, methylpyrrolidone, 1,4-dioxane or acetone are used in the preparation process of the cellulose triacetate forward osmosis membrane and other toxic organic solvents, the film-making process is not environmentally friendly and organic solvents are easy to remain in the film-forming process

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
  • A preparation method of forward osmosis emergency drinking water bag based on layer-by-layer self-assembly method
  • A preparation method of forward osmosis emergency drinking water bag based on layer-by-layer self-assembly method
  • A preparation method of forward osmosis emergency drinking water bag based on layer-by-layer self-assembly method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A method for preparing a forward osmosis emergency drinking water bag based on a layer-by-layer self-assembly method. The drinking water bag is made by sealing two forward osmosis membranes 1, and the water bag composed of forward osmosis membranes is filled with a draw liquid 3. The forward osmosis membrane is prepared by a layer-by-layer self-assembly method. The outer side of the water bag is the active layer 2 of the forward osmosis membrane, and the inner side of the water bag is the support layer 4, which is in contact with the drawing liquid. The specific method of the layer-by-layer self-assembly method of the forward osmosis membrane Proceed as follows:

[0027] (1) Preparation of layer-by-layer self-assembled forward osmosis membrane: configure cationic and anionic polyelectrolyte casting solutions, use ultrafiltration membranes as base membranes, cationic and anionic polyelectrolyte casting solutions as construction units, and adopt static alternating depositi...

Embodiment 1

[0038] Preparation of forward osmosis membrane: prepare 1% acetic acid solution containing 2g / L chitosan as cationic polyelectrolyte casting solution, use NaCl to adjust the salt background concentration of casting solution to 0.1mol / L; prepare 1g / L sodium alginate The aqueous solution is an anionic polyelectrolyte casting solution, and NaCl is used to adjust the background salt concentration of the casting solution to 0.1mol / L. With the polyethersulfone (PES) ultrafiltration membrane with a molecular weight cut-off of 20000 Daltons as the base membrane, the cationic and anionic polyelectrolyte casting liquids are used as the construction unit, and the layer-by-layer self-assembly method of static alternate deposition (dipping coating layer self-assembly Method) Six layers of polyelectrolyte were deposited on the active layer of ultrafiltration membrane.

[0039] Specifically, rinse the active layer protective solution of the basement membrane of the ultrafiltration membrane w...

Embodiment 2

[0045] Preparation of forward osmosis membrane: prepare 1% acetic acid solution containing 2g / L chitosan as cationic polyelectrolyte casting solution, adjust the salt background concentration of casting solution to 0.1mol / L with NaCl; prepare 2g / L sodium alginate The aqueous solution is an anionic polyelectrolyte casting solution, and NaCl is used to adjust the background salt concentration of the casting solution to 0.1mol / L. With the polyethersulfone (PES) ultrafiltration membrane with a molecular weight cut-off of 20000 Daltons as the base membrane, the cationic and anionic polyelectrolyte casting liquids are used as the construction unit, and the layer-by-layer self-assembly method of static alternate deposition (dipping coating layer self-assembly Method) Six layers of polyelectrolyte were deposited on the active layer of ultrafiltration membrane.

[0046] Specifically, rinse the active layer protective solution of the basement membrane of the ultrafiltration membrane wit...

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 method for preparing a forward osmosis emergency drinking water bag prepared by a layer-by-layer self-assembly method. The drinking water bag is prepared by sealing two forward osmosis membranes. The osmotic membrane is prepared by a layer-by-layer self-assembly method. The outer side of the water bag is the active layer of the forward osmosis membrane, and the inner side of the water bag is the support layer, which is in contact with the drawing liquid. Standard drinking water has the characteristics of energy saving and economy. On the premise of ensuring the effective interception of organic pollutants and heavy metal ions, the water production is stable, and the water flux can reach 1.7-3.5L / (m 2 h). Provide safe and delicious drinking water solutions for end users in emergency situations such as natural disasters, unexpected dangers, and wild survival in the absence of material rescue and lack of clean water sources, and provide them in line with the national "Drinking Water Hygiene Standards" (GB5749‑2006) purified water.

Description

technical field [0001] The invention belongs to the field of environmental engineering and relates to forward osmosis membrane technology, in particular to a method for preparing a forward osmosis emergency drinking water bag based on a layer-by-layer self-assembly method. Background technique [0002] Water is an important natural resource and environmental element on which all life depends. Drinking water safety is directly related to people's physical and mental health and life safety. In emergency situations (natural disasters, accidental dangers, wild survival, etc.) that lack clean water sources, drinking water safety is even more important. Various emergency situations often face the situation of lack of energy supply. The technology of producing purified water without external driving force and on-site treatment highlights its own advantages. Users can easily obtain safety and taste without waiting for material rescue. Good drinking water. [0003] Forward osmosis...

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 Patents(China)
IPC IPC(8): B01D61/00C02F101/20C02F101/30
CPCB01D61/002C02F1/445B01D63/00B01D69/10B01D69/105B01D67/0002B01D2325/30C02F2101/30C02F2101/20
Inventor 刘磊杨照贤
Owner CHANGCHUN UNIV OF SCI & TECH
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