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Asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane, preparation method and application thereof

A polyvinyl chloride, asymmetric technology, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve problems such as difficult cleaning, affecting service life, easy clogging of sponge-like pore structure microporous membranes, etc., and achieve porosity High, performance dry and wet reversible, high strength effect

Inactive Publication Date: 2011-05-25
天津市宝钜净化设备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to overcome above-mentioned defective, provide a kind of highly asymmetric polyvinyl chloride dry-wet reversible ultra / microfiltration membrane and preparation method, the membrane prepared by this method solves the problem of existing phase inversion method to prepare spongy pore structure microfiltration membrane. The problem that the service life of the porous membrane is affected by easy clogging, rapid flow failure, and difficulty in cleaning

Method used

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  • Asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane, preparation method and application thereof
  • Asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane, preparation method and application thereof
  • Asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The various implementation conditions of embodiment 1 are as shown in table 1:

[0078] Table I

[0079]

[0080] Main raw materials: PVC is Tianjin Bohua Group Tianjin Chemical Factory, PEG is 20000, China Pharmaceutical Group Shanghai Chemical Reagent Company; DMAC is Shanghai Jingwei Chemical Co., Ltd.

Embodiment 2

[0081] The various implementation conditions of embodiment 2 are as shown in table two:

[0082] Table II

[0083]

Embodiment 3

[0084] The various implementation conditions of embodiment 3 are as shown in table three:

[0085] Table three

[0086]

[0087] Wherein: PVP, K90, China Pharmaceutical Group Shanghai Chemical Reagent Company; other raw materials are the same as in Example 1. The various implementation conditions of embodiment 4 are as shown in table four:

[0088] Table four

[0089]

[0090] Raw material is with embodiment 3.

[0091] In each embodiment, the structure and performance situation of polyether iron microporous membrane sample are shown in Table 5, wherein:

[0092] The water flux test uses a sample with a diameter of φ10cm, and tests it under the static pressure of a water column of 1m;

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Abstract

The invention relates to an asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration / microfiltration membrane, a preparation method and application thereof, which belong to the field of polymer microporous membranes. The asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration / microfiltration membrane is prepared by the following steps of: striking membrane casting liquid which is prepared from polyvinyl chloride (PVC) serving as a major raw material on a carrier substrate so as to obtain an initial liquid producing membrane; gelling in coagulating liquid consisting of a mixed solvent; washing with water and soaking; and drying so as to obtain a finished membrane. The PVC ultrafiltration / microfiltration membrane prepared by a method has a finger-shaped structure on the surface, highly asymmetrical spongy porous structures on a mold stripping side and inside the membrane, has reversible dryness and wetness membrane performance and high stain resistance, is blocked difficultly, is easy to clean and regenerate, has a pore diameter which is adjustable between 0.01 and 1.0 mu m, is suitable for precision filtration, recycled water treatment, R0 pre-cartridge filtration, terminal precision filtration, tapped water direct drinking filtration, sewage treatment and liquid purification and filtration.

Description

technical field [0001] The invention relates to the preparation of membrane materials, in particular to a preparation method of an asymmetric polyvinyl chloride dry-wet reversible ultra / microfiltration membrane. Background technique [0002] Polyvinyl chloride (PVC) is a traditional polymer material with good chemical stability and high mechanical strength. There are stable industrial products in my country, and it has been paid enough attention since the early stage of film development in my country. Its low price, strong resistance The advantages of acidity and alkalinity make it widely developed in the field of membrane separation technology. However, the hydrophilicity of PVC material is poor, the membrane separation efficiency is low, and the anti-pollution ability is also poor. The water permeability rate of dry and wet membranes is very different, so most of the products are wet membranes that are plasticized with glycerin and stored. , to keep the membrane pore struc...

Claims

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Application Information

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IPC IPC(8): B01D71/30B01D67/00B01D61/18
Inventor 刘峥刘永兴王守印吴良义
Owner 天津市宝钜净化设备工程有限公司
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