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Multiple layer composite micropore filtration separation material and preparation method and use thereof

A technology for microporous filtration and separation of materials, applied in filtration separation, separation methods, semi-permeable membrane separation, etc., can solve the problems of small strength elongation at break, achieve uniform pore size distribution, improve pore uniformity, and good use. performance effect

Active Publication Date: 2009-03-11
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

This technology can effectively control the pore size and prevent pinholes, but because the main component of this type of material is short fibers, the strength, especially the elongation at break, is small

Method used

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  • Multiple layer composite micropore filtration separation material and preparation method and use thereof
  • Multiple layer composite micropore filtration separation material and preparation method and use thereof
  • Multiple layer composite micropore filtration separation material and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Fig. 1 is a process flow of the present invention, figure 2 is the flow chart of the preparation of fibrillated fibers. According to this process, the specific implementation steps are as follows:

[0035] (1) Get a certain amount of PBO fibers (trade name: Zylon, produced by Toyobo Corporation in Japan, chopped fibers, length 3mm, diameter 15 μm) with a single-disc refiner to prepare PBO fibrillated fibers with a freeness of 30ml in Canada.

[0036] (2) PBO fibrillated fiber (dry weight 15g / m 2 ), dispersed to obtain a homogeneous suspension.

[0037] (3) Add 15g / m 2 The PP carded non-woven fabric is arranged on the Tappi standard handsheet forming net, and the PBO fibrillated fibers are directly formed on the non-woven fabric, and then dewatered and pressed.

[0038] (4) Dry at 100°C for 5 minutes to prepare 30g / m 2 base paper.

[0039] (5) Hot press the base paper (line pressure 200Kg / cm, temperature 100°C) to prepare filter separation material, its performanc...

Embodiment 2

[0041] In this embodiment, except for the following features, all the other steps are the same as in Embodiment 1.

[0042]In step (1), a certain amount of PBO fiber (trade name: Zylon, produced by Toyobo Corporation in Japan, chopped fiber, length 3mm, diameter 15 μm) is refined with a single disc to prepare the original PBO fiber with a freeness of 80ml in Canada. Fibrillated fibers.

[0043] The properties of the filter separation material obtained in this embodiment are shown in Table 1.

Embodiment 3

[0045] In this embodiment, except for the following features, all the other steps are the same as in Embodiment 1.

[0046] In step (1), a certain amount of PBO fiber (trade name: Zylon, produced by Toyobo Corporation in Japan, chopped fiber, length 3mm, diameter 15 μm) is refined with a single disc to prepare the original PBO fiber with a freeness of 200ml in Canada. Fibrillated fibers.

[0047] The electron micrograph of the filter separation material that present embodiment obtains is as Figure 4 (A and B), its properties are shown in Table 1.

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Abstract

The invention relates to a multi-layer composite micropore filter separation material, a method for preparing the material and the application thereof, wherein, the preparation method comprises the following steps: (1) the fiber which can be fibrillated is prepared into fully fibrillated fiber material by pulping process; (2) the slurry is obtained after the fully fibrillated fiber material is dispersed in water; (3) advancing to the net and shaping are carried out, a layer of nonwoven fabric is placed on a shaping net, the above slurry is dehydrated on the nonwoven fabric directly for compound molding; (4) drying is carried out for obtaining the product. The product can also be processed by hot press molding. The method can be operated easily, is applicable for application of large scale, the obtained multi-layer composite high temperature resistance micropore filter separation material has the outstanding performance of high temperature resistance, meanwhile the uniformity of the holes is excellent, the average aperture can reach 10nm-1mum, and the method can be used in such fields as preparing filter material, battery septum material, electrolytic capacitor paper and double electric layers capacitor septum, etc.

Description

technical field [0001] The invention relates to the technical field of papermaking and filtration separation, in particular to a multilayer composite 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 20 μm, and 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 passin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D67/00B01D69/12H01M2/16D21F11/14D21H27/08H01M50/403H01M50/414H01M50/44H01M50/491
CPCY02E60/10
Inventor 胡健王宜梁云于天
Owner ZHUZHOU TIMES FIBER PIONEER MATERIAL TECH CO LTD
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