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

Manufacturing method of filter material

A manufacturing method and filter material technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of poor filtration performance, defective products, easy damage, etc., and achieve low production costs, improve binding force, membrane The effect of narrow pore size distribution

Pending Publication Date: 2021-03-26
NANJING UNIV OF TECH +1
View PDF12 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As we all know, the cracking, peeling and hollowing of the membrane layer are easy problems in the membrane making process, resulting in defective products in the production process, and are also easily damaged during use, with short life and poor filtration performance.

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
  • Manufacturing method of filter material
  • Manufacturing method of filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) A porous titanium tube with an outer diameter of 10 mm, a wall thickness of 2 mm, a length of 20 cm, and an average pore diameter of 6 μm was selected as the base material, cleaned ultrasonically with ethanol, and dried.

[0029] 2) Weigh 20 g of titanium powder with an average particle diameter of 2 μm, add it to 250 ml of 2% polyvinyl butyral (PVB) ethanol solution, and stir for 6 hours. Spray the prepared powder slurry onto the surface of the porous titanium tube by spraying to form a uniform continuous coating, and let it dry naturally.

[0030] 3) Spray a layer of liquid paraffin evenly on the surface of the coating as a release agent, and seal the titanium tube with an elastic rubber sleeve, such as figure 1 shown. Put into cold isostatic pressing equipment and press, and the pressing pressure is 100MPa.

[0031] 4) Remove the elastic rubber sleeve, carry out vacuum sintering on the taken-out green body, raise the temperature to 1000°C at a rate of 4°C / min, k...

Embodiment 2

[0033] 1) Use a porous nickel tube with an outer diameter of 24mm, a wall thickness of 3mm, a length of 50cm, and an average pore diameter of about 12μm as the base material, and use 1000-mesh sandpaper to polish the surface spikes, first brush it, then rinse it with water, and dry it.

[0034] 2) Take 50g of nickel powder with an average particle diameter of 4 μm, add it to 500ml of 3% polyvinyl alcohol (PVA) aqueous solution, stir for 10 hours, brush the prepared powder slurry on the surface of the porous nickel tube to form Uniform continuous coating, dried in a vacuum oven.

[0035] 3) With step 3) in embodiment 1, but pressing pressure is 80MPa.

[0036] 4) Remove the elastic rubber sleeve, raise the temperature of the taken-out body to 1030° C. at a rate of 6° C. / min in an argon atmosphere, keep it warm for 2 hours, and cool naturally to room temperature to prepare a porous nickel membrane filter material.

Embodiment 3

[0038] 1) A porous stainless steel tube with an outer diameter of 36 mm, a wall thickness of 3 mm, a length of 40 cm, and an average pore diameter of 30 μm is selected as the matrix material, and the surface is blown with compressed air, and the pores are blown from the inside to the outside.

[0039] 2) Weigh 120 g of stainless steel powder with an average particle diameter of 6 μm, add it to 800 ml of 4% polyethylene glycol (PEG) isopropanol solution, and stir for 12 hours. The prepared powder slurry was deposited on the inner surface of the porous stainless steel substrate by suction method to form a uniform continuous coating, which was then dried naturally.

[0040] 3) Spray a layer of glycerin evenly on the surface of the coating as a release agent, and use an elastic rubber sleeve to seal the porous stainless steel tube, such as figure 2 shown. Put it into cold isostatic pressing equipment for pressing, and the pressing pressure is 90MPa.

[0041] 4) Remove the elast...

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
thicknessaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a manufacturing method of a metal film filter material; isostatic cool pressing equipment is adopted to press a metal powder coating layer, so that the binding force of the coating layer and a porous metal matrix is greatly improved, the problems of cracking, peeling, hollowing and the like in the manufacturing process of the metal film filter material are effectively avoided, the defective rate of the metal film filter material is reduced, and the strength and the filtering performance of the metal film filtering material are improved. According to the invention, the difficulty of coating layer quality control is reduced, the process is simple, the production cost is low, the film pore size distribution is narrow, the film flatness is high, and the defects are few.

Description

technical field [0001] The invention belongs to the technical field of filtration and separation, and in particular relates to a method for manufacturing a filter material with a gradient structure or a membrane structure. [0002] technical background [0003] Filtration is to use porous media to intercept suspended matter in gas or liquid, so as to realize the separation or recovery of suspended matter. The porous media is called filter material, referred to as filter material. The filter material must generally have stable physical and chemical properties, be durable, and be reusable. The types of filter media include tube type, sheet type, hollow fiber type, capsule type, folded type, etc. The filter material materials include filter paper, filter cloth, porous metal, porous ceramics, organic membrane, fused sand glass, etc. The working principle of the filter material is mainly the sieving effect of the pore size. The smaller the pore size, the higher the filtration acc...

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): B01D39/14
CPCB01D39/14B01D2239/10B01D2239/0471
Inventor 黄彦肖龙龙
Owner NANJING UNIV OF 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