Wet method forming micropore filtration separation material and preparation method and application thereof

A technology for microporous filtration and separation of materials, applied in filtration and separation, separation methods, chemical instruments and methods, etc., can solve problems such as easy falling off, achieve good pore uniformity, improve pore uniformity, and improve uniformity. Effect

Active Publication Date: 2009-09-16
ZHUZHOU TIMES FIBER PIONEER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the diaphragm materials disclosed in the above two patents is that the inorganic particle fillers of the diaphragm materials prepared by the coating method are prone to fall off during multiple cycles of charging and discharging

Method used

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  • Wet method forming micropore filtration separation material and preparation method and application thereof
  • Wet method forming micropore filtration separation material and preparation method and application thereof
  • Wet method forming micropore filtration separation material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) if figure 1 and figure 2 As shown, get a certain amount of PPTA fiber (trade name: Kevlar, U.S. Dupont company produces, length 5mm, diameter 15 μ m) through refining, the preparation Canada freeness is the PPTA fibrillation fiber of 30ml;

[0034] (2) PPTA fibrillated fibers and PET bonding fibers (manufactured by Kuraray, fiber diameter 3-4μm, fiber length 3mm, cortex melting point 130°C) are uniformly mixed in the aqueous solution at a fiber dry mass ratio of 8:2, Add PAM as a dispersant to obtain a fiber suspension;

[0035] (3) Take 5% SiO of fiber dry weight again 2 Particles (average particle size 300nm) are uniformly dispersed in aqueous solution by adding silane coupling agent;

[0036] (4) Mix the particle suspension in step (3) and the fiber suspension in step (2) evenly to prepare a slurry with a concentration of .

[0037] (5) Make quantitative 30g / m on inclined wire paper machine 2 base paper. The base paper was hot-pressed (line pressure 150Kg...

Embodiment 2

[0039]Adopt the SiO of 0.1% of fiber absolute dry weight in step (3) 2 Particle (average particle diameter is 300nm), all the other steps are with embodiment 1.

Embodiment 3

[0041] In step (3), adopt the SiO of 10% of fiber absolute dry weight 2 Particle (average particle diameter is 300nm), all the other steps are with embodiment 1.

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Abstract

The invention discloses a preparation method for wet method forming micropore filtration separation material, which includes steps of (1) carrying out pulping process for fibrillatable fiber to prepare fullyfibrillatable fiber raw material; (2) dispersing the fiber raw material into water to obtain paste; (3) uniformly dispersing grain with diameter of 1nm-1mum into water; (4) mixing the grain water dispersing liquid of the step (3) with the paste of the step (2) and uniformly stirring; (5) forming on net and drying. The micropore filtration separation material prepared by the present invention can be used for filtration material, battery diaphragm material, electrolytic capacitor paper and double-electric layer capacitor diaphragm. The invention can effectively increase uniformity of bore diameter distribution, so that grain filling material is not easily to fall off.

Description

technical field [0001] The invention relates to the technical field of papermaking and filtration separation, in particular to a wet-formed microporous filtration separation material and its preparation method and application. Background technique [0002] Microporous filtration (MF for short) refers to the process of separating by sieving. The diameter of the separated components ranges from 0.01 to 20um. It mainly removes micron particles, submicron particles and subsubmicron particles. Microfiltration is mostly used for the treatment of industrial ultrapure water, the pretreatment of reverse osmosis, the removal of impurities in the wine brewing process, and the separation of serum to filter out bacteria, serum, macromolecular substances and fine suspended particles. This kind of material can also be applied to the battery separator, the main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from freely passing through, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16D21F11/00D21F13/00H01M2/16H01M50/403H01M50/44
CPCY02E60/12Y02E60/10
Inventor 胡健王宜梁云曾抒姝
Owner ZHUZHOU TIMES FIBER PIONEER MATERIAL TECH CO LTD
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