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

Preparation method of nano inorganic-organic nano-filtration membrane

A composite nanofiltration membrane and nano-inorganic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of heat-labile compounds, infeasibility, and reduced rejection rate, and achieve low thermal conductivity, The effect of low heat capacity

Inactive Publication Date: 2015-04-15
曹福宝
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since temperature affects solvent viscosity, diffusion coefficient, polymer chain fluidity, and membrane pore size, the permeation flux of the membrane is generally increased by increasing the temperature of the feed liquid, but the rejection rate generally increases with the increase of the membrane permeation flux. decreased
In addition, in some cases, although heating the feed is simple, it is not practical, such as large-scale water purification processes and seawater desalination processes; and it is not feasible for some heat-labile compounds (proteins, etc.)

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

[0018] Put cellulose acetate into dichloromethane and stir for 21 hours, then add water and stir for 3 hours, and then let it stand for 64 hours to obtain a casting solution;

[0019] Hang the above-mentioned casting solution on a glass plate to form a wet film of 280 μm in size. The wet film was left to stand in air at 26°C and a relative humidity of 65% for 23 minutes, and then immersed in deionized water at 23°C for 15 minutes to obtain an asymmetric film. ;

[0020] The asymmetric membrane is sequentially subjected to methanol solution with a volume concentration of 58%, and cyclohexane exchange treatment to obtain a cellulose acetate nanofiltration flat wet membrane;

[0021] Soak the cellulose acetate nanofiltration plate wet membrane in silver nitrate solution for 20 minutes, and then wash it with deionized water to obtain a composite wet membrane;

[0022] Attach the composite wet film on the insulating surface, and irradiate the upper surface of the film with a conti...

Embodiment 2

[0024] Put cellulose acetate into dichloromethane and stir for 19 hours, then add water and stir for 2 hours, and then let it stand for 60 hours to obtain a casting solution;

[0025] Hang the above-mentioned casting solution on a glass plate to make a 280 μm wet film, and let the wet film stand in air at 20°C and a relative humidity of 60% for 20 minutes, and then soak it in deionized water at 20°C for 10 minutes to obtain an asymmetric film ;

[0026] The asymmetric membrane is sequentially exchanged with a methanol solution with a volume concentration of 53% and cyclohexane to obtain a flat wet membrane of cellulose acetate nanofiltration;

[0027] Soak the cellulose acetate nanofiltration plate wet membrane in silver nitrate solution for 20 minutes, and then wash it with deionized water to obtain a composite wet membrane;

[0028] Attach the composite wet film on the insulating surface, and irradiate the upper surface of the film with a continuous argon ion laser beam (wa...

Embodiment 3

[0030] Put cellulose acetate into dichloromethane and stir for 21 hours, then add water and stir for 3 hours, and then let it stand for 60 hours to obtain a casting solution;

[0031] Hang the above-mentioned casting solution on a glass plate to make a 280 μm wet film, and let the wet film stand in air at 20°C and a relative humidity of 60% for 20 minutes, and then soak it in deionized water at 20°C for 10 minutes to obtain an asymmetric film ;

[0032] The asymmetric membrane is sequentially exchanged with a methanol solution with a volume concentration of 53% and cyclohexane to obtain a flat wet membrane of cellulose acetate nanofiltration;

[0033] Soak the cellulose acetate nanofiltration plate wet membrane with silver nitrate solution for 30 minutes, and then wash it with deionized water to obtain a composite wet membrane;

[0034] Attach the composite wet film on the insulating surface, and irradiate the upper surface of the film with a continuous argon ion laser beam (...

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 preparation method of a nano inorganic-organic nano-filtration membrane, and belongs to the technical field of nano-filtration membrane preparation. The preparation method comprises the following steps: putting cellulose acetate into dichloromethane, stirring to obtain a casting solution; painting the casting solution on a glass plate to form a wet membrane with a thickness of 280 [mu]m, allowing the wet membrane to stand still for 20-23 minutes, then soaking the glass plate in deionized water with a temperature of 20-23 DEG C for 10 to 15 minutes so as to obtain an asymmetric membrane; subjecting the asymmetric membrane to exchange treatments in a methanol solution and cyclohexane in sequence so as to obtain a cellulose acetate nano-filtration flat wet membrane; soaking the obtained wet membrane in a silver nitrate solution for 20 to 30 minutes, washing so as to obtain a composite wet membrane; paving the composite wet membrane on an insulation surface, radiating the upper surface of the composite wet membrane by argon ion laser beams for 15 to 25 minutes so as to obtain the target product. The permeation flux of the membrane prepared by the provided preparation method will increase when the temperature is rising.

Description

technical field [0001] The invention relates to a method for preparing a nano-inorganic-organic composite nanofiltration membrane, belonging to the technical field of nanofiltration membrane preparation. Background technique [0002] Membrane separation technology is an emerging discipline produced by the cross-combination and interpenetration of many disciplines such as materials, chemical engineering and process engineering. It is an important high-tech solution to contemporary energy, resource and environmental problems. The application of nano-inorganic-organic composite membranes in membrane separation technology is particularly prominent. Because nanoparticles have the characteristics of large specific surface area, highly activated surface active atoms, and strong interfacial interaction with polymers, using inorganic nanoparticles as a reinforcing phase to uniformly disperse them in the organic host phase can improve the interaction with the matrix. The interface is...

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): B01D71/12B01D67/00B01D69/12B01D69/06
Inventor 曹福宝
Owner 曹福宝
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