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

Black talc nano particle modified polyamide composite nano-filtration membrane

A technology of nanoparticle modification and composite nanofiltration membrane, which is applied in membrane, membrane technology, semi-permeable membrane separation, etc. It can solve the problems of poor separation performance, low mechanical strength, and easy contamination of the membrane, and achieve low production cost, Excellent mechanical properties and the effect of improving water flux

Active Publication Date: 2021-05-07
ZHEJIANG UNIV OF TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the prior art that the membrane is easily polluted, the separation performance is poor, and the mechanical strength is low, the invention provides a black talc nanoparticle modified polyamide composite nanofiltration membrane and its preparation method

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
  • Black talc nano particle modified polyamide composite nano-filtration membrane
  • Black talc nano particle modified polyamide composite nano-filtration membrane
  • Black talc nano particle modified polyamide composite nano-filtration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) 10g black talc (black talc originates from Guangfeng District, Shangrao City, Jiangxi Province) is ball milled, wet-grinded for 5h with ball mill 600r / min, washed with water and centrifugally dried to obtain 8.8g black talc nanoparticles (average particle diameter is 220nm ). Then add 0.369g of black talc nanoparticles into 20mL of N-methylpyrrolidone solvent, ultrasonic (100W 40KHz) for 1h to make it uniformly dispersed, then add 3.86g of polysulfone and stir to dissolve for 12h, let it stand for defoaming, and form a 28mL stable Uniform casting solution.

[0042] (2) Use a spatula to scrape 2mL of casting solution onto a glass plate, and quickly put it into a deionized water coagulation bath. After the phase inversion is complete, a 130cm 2 The black talc nanoparticles / polysulfone support layer, the black talc nanoparticles / polysulfone support layer was transferred to deionized water to continue the solvent exchange for 24 hours for later use.

[0043] (3) The bla...

Embodiment 2

[0046] (1) 10g black talc (black talc originates from Guangfeng District, Shangrao City, Jiangxi Province) is ball milled, wet-grinded with ball mill 600r / min for 5h, washed with water, and centrifugally dried to obtain 8.8g black talc nanoparticles (average particle diameter of 220nm). Then add 0.215g of black talc nanoparticles into 20mL of N-methylpyrrolidone solvent, ultrasonically (100W 40KHz) for 1.5h to make it evenly dispersed, then add 2.58g of polysulfone and stir to dissolve for 12h, let it stand for defoaming to form 26mL Stable and uniform casting solution.

[0047] (2) Use a spatula to scrape 2mL of casting liquid onto a glass plate, put it into a coagulation bath of deionized water quickly, and after the phase inversion is complete, put 130cm 2 The black talc nanoparticles / polysulfone support layer was transferred to deionized water to continue solvent exchange for 24 hours for later use;

[0048] (3) Immerse black talc nanoparticles / polysulfone porous support...

Embodiment 3

[0051] (1) 10g black talc (black talc originates from Guangfeng District, Shangrao City, Jiangxi Province) is ball milled, wet-grinded with ball mill 600r / min for 5h, washed with water, and centrifugally dried to obtain 8.8g black talc nanoparticles (average particle diameter of 220nm). Then add 0.826g of black talc nanoparticles into 15mL of N-methylpyrrolidone solvent, ultrasonic (100W 40KHz) for 1h to make it uniformly dispersed, then add 2.48g of polysulfone and stir to dissolve for 12h, let it stand for defoaming, and form a 27mL stable Uniform casting solution.

[0052] (2) Use a spatula to scrape 2mL of casting liquid onto a glass plate, put it into a coagulation bath of deionized water quickly, and after the phase inversion is complete, put 130cm 2 The black talc nanoparticles / polysulfone support layer was transferred to deionized water to continue solvent exchange for 24 hours for later use.

[0053] (3) Immerse black talc nanoparticles / polysulfone porous support me...

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
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a black talc nano particle modified polyamide nano-filtration membrane and a preparation method thereof. Black talc nano particles are used as a membrane modification material for the first time, the black talc nano particles are added into a membrane casting solution and stirred uniformly, the membrane is scraped after standing and defoaming, so that the membrane is introduced into a supporting membrane, and then the black talc nano particle blending modified polyamide nano-filtration membrane is prepared through an interface polymerization method. The pore diameter structure and porosity of the support membrane are effectively adjusted by adopting a modification method of introducing black talc nano particles into the support membrane, effective regulation and control on the PA active layer structure and the separation performance of the nano-filtration membrane are realized, and the water flux, mechanical strength and anti-pollution performance of the membrane can be greatly improved without influencing the separation performance; and the membrane preparation method is low in cost, simple and controllable, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and particularly relates to a polyamide composite nanofiltration modified by black talc nanoparticles to improve the separation performance, membrane strength and membrane anti-pollution performance of polyamide nanofiltration membranes by adding black talc nanoparticles Membrane Preparation Method. Background technique [0002] Due to rapid population and economic growth, water pollution and water scarcity have become global challenges. Current research is generally devoted to developing advanced materials and technologies that can be used to increase freshwater supplies through desalination or wastewater recycling. Among all existing seawater desalination technologies, pressure-driven membrane technology, such as reverse osmosis (RO) and nanofiltration (NF), is one of the most efficient and promising technologies. Among them, the nanofiltration membrane can realize the inter...

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): B01D69/12B01D61/00B01D69/10B01D67/00
CPCB01D69/12B01D61/027B01D69/10B01D69/105B01D67/0079B01D2325/24
Inventor 张国亮范子璇张旭孟琴
Owner ZHEJIANG UNIV OF TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com