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

Preparation method for reinforced polyvinylidene fluoride hollow fiber membrane

A polyvinylidene fluoride and fiber membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as needing improvement, fracture and damage, and affecting treatment effect, so as to reduce irreversible deposition and prolong service life The effect of increasing the lifespan and increasing the mechanical bonding strength

Inactive Publication Date: 2019-05-28
乐清腾祥膜技术有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of use, it has to repeatedly withstand the impact and disturbance of large flow water flow and air flow, which is very prone to fracture and damage, which affects the treatment effect and also brings adverse effects on subsequent unit operations.
Corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weather resistance of existing ultrafiltration membranes, separation membranes, and hollow fiber membranes need to be improved

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 for reinforced polyvinylidene fluoride hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Example: such as figure 1 Shown, the present invention provides a kind of preparation method of reinforced polyvinylidene fluoride hollow fiber membrane, comprises the steps:

[0024] 1) Preparation of casting solution: mix polyvinylidene fluoride, inorganic additives, porogen, coupling agent, initiator and solvent, and then ultrasonically disperse at 60-80°C for 30-60min to obtain a solution; add organic additives to In the solution, stir to dissolve, specifically stir at 60-80°C at a stirring speed of 200-400r / min for 8h, then raise the temperature to 80-90°C and stir for 2-5h, then cool down to 70-80°C and stir for 6-10 hours, After filtering and defoaming, the casting solution is obtained;

[0025] 2) Preparation of hollow braided rope: under the condition of 30-80°C, soak the hollow braided rope with a mass concentration of 10% sodium hydroxide aqueous solution for 0.5h-1h to remove the oil stain on the surface, take it out and wash it with water and dry it for la...

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 discloses a preparation method for a reinforced polyvinylidene fluoride hollow fiber membrane. The preparation method comprises the following steps of preparing a casting solution, preparing a hollow braided rope, preparing a reinforcing body, preparing a primary hollow fiber membrane body, preparing a reinforced body base membrane body and preparing the hollow fiber membrane. The method has the advantages of being simple in process and high in efficiency, meanwhile, the prepared membrane has excellent corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance, pollutants can be selectively blocked, irreversible deposition of the pollutants on the surface of the membrane can be prevented or reduced, and the anti-pollution performance of the membrane is improved; and the problem that the skin layer is prone to fall off in the using process of a hollow fiber membrane can be solved, a polyacrylonitrile filament which has the co-solvent characteristic with a polyvinylidene fluoride surface separation layer is adopted and is woven into hollow tubular fabric to serve as the reinforced body of the membrane, the casting solution has agood wettability on the reinforcing body and partially permeates into fiber gaps of the reinforcing body, the mechanical bonding strength is improved, the possibility of filament breaking and pollutant blockage can be lowered, and the service life of the membrane is prolonged.

Description

technical field [0001] The invention relates to the technical field of hollow fiber membrane manufacturing, in particular to a method for preparing a reinforced polyvinylidene fluoride hollow fiber membrane. Background technique [0002] With the rapid growth of social economy, the increasing shortage of water resources has become an important factor restricting economic and social development. Membrane separation and purification technology has great advantages and potential in water treatment and other environmental protection fields because of its advantages such as high separation efficiency, simple equipment, convenient operation, high degree of automation, and no secondary pollution. Polymer organic membrane plays an important role in the field of membrane separation, and its production process is simple, and the variety of membrane materials is relatively diverse. The use of polyvinylidene fluoride hollow fiber membranes involves a wide range of applications and can ...

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): B01D71/34B01D69/08B01D69/02B01D67/00
Inventor 卢启友
Owner 乐清腾祥膜技术有限公司
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