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Method for preparing polymer/montmorillnoite nano composite hydrophilic membrance

A nano-composite and montmorillonite technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as poor hydrophilicity, easy pollution, and difficulty in large-scale application

Inactive Publication Date: 2005-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor hydrophilicity of existing polymer membrane materials, low surface energy, easy pollution, defects in existing membrane material modification methods, and difficulty in large-scale application

Method used

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Experimental program
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specific Embodiment approach 1

[0004] Specific embodiment one: present embodiment is realized through the following steps: one, at first carry out modification on montmorillonite: (1), get following raw material by weight parts: montmorillonite 0.1~20, dispersant 10~400 , cationic modifier 1-50, protonic acid 0.01-10; (2), put montmorillonite into the dispersant and stir at high speed, and heat to 50-95°C to make a mixed solution; (3), mix cationic Modifier and protonic acid are added in the above-mentioned mixed solution, and reacted for 0.5~3 hours; (4), the mixed solution after the reaction is suction-filtered, and the montmorillonite is washed until the filtrate is dripped with silver nitrate without precipitation; ( 5), the above-mentioned montmorillonite is vacuum-dried, and the dried product is ground to a powder with a particle size of less than 100 μm, which is organic montmorillonite; 2. Preparation of polymer / montmorillonite nanocomposite hydrophilic membrane: a. Take the following raw materials ...

specific Embodiment approach 2

[0005] Specific embodiment two: In step one of this embodiment, the following raw materials are taken in parts by weight: montmorillonite 0.2-19, dispersant 15-395, cationic modifier 2-48, protonic acid 0.05-9.5; The following raw materials are taken in parts by weight: polymer 53-147, organic montmorillonite 0.2-19.5, dispersion medium 14-998, organic additive 11-49, inorganic additive 0.2-29. other methods with

[0006] The specific embodiment one is the same.

specific Embodiment approach 3

[0007] Specific embodiment three: In step one of this embodiment, the following raw materials are taken in parts by weight: montmorillonite 0.3~18.5, dispersant 17~390, cationic modifier 2.5~47, protonic acid 0.1~8.5; The following raw materials are taken in parts by weight: polymer 59-142, organic montmorillonite 0.3-19, dispersion medium 18-990, organic additive 13-47, inorganic additive 0.4-28. other methods with

[0008] The specific embodiment one is the same.

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Abstract

A preparation method of polymer / Mengtuotu composite hydrophilic membrane relates to preparation craft of composite membrane disposed by water. The step is: Dissolving polymer and organic Mengtuotu respectively in medium of 30 Deg. to 95 Deg. C for 3 to 20 hours; Mixing the admixture for 1 to 20 hours; Add organic matter and inorganic matter and mixing for 5 to 24 hours, it becomes cast-iron liquid; Make membrane. The present invention makes use of high surface energy of Nami Mengtuotu particulate to counteract the disfigurement the low surface energy of polymer. The changeable character of Nami Mengtuotu is different from others; it not only changes hydrophilic character of composite pottery but also changes hydrophilic character in interface of inner hole. The present invention can solve the membrane pollution problem effectively, increases flowing and sectional flowing rate, prolongs the cycle of cleaning and can be applied on a large scale.

Description

Technical field: [0001] The invention relates to a preparation process of a composite membrane used for water treatment. Background technique: [0002] Membrane treatment technology is the preferred technology for drinking water treatment in the 21st century. Compared with conventional water treatment technology, it has the advantages of low energy consumption, high separation efficiency, simple process, no need to add additives, and no impact on human health. However, due to concentration polarization The existence of problems such as membrane fouling and other problems lead to the decline of permeation flux with the extension of operation time; a large amount of energy consumption in the operation process is used for the recirculation of raw material liquid to control concentration polarization and membrane fouling, which seriously hinders microfiltration. And larger-scale industrial applications of ultrafiltration technology. In the process of membrane separation, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/00
Inventor 马军马玉新
Owner HARBIN INST OF TECH
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