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A kind of preparation method of titanium dioxide modified polypyrrole composite nanofiltration membrane

A composite nanofiltration membrane and titanium dioxide technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low flux and poor retention performance of nanofiltration membranes, and achieve improved permeation flux and improved The effect of stability and major application prospects

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of low flux and poor interception performance of nanofiltration membranes prepared by existing methods, and provides a preparation method of titanium dioxide modified polypyrrole composite nanofiltration membranes

Method used

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  • A kind of preparation method of titanium dioxide modified polypyrrole composite nanofiltration membrane
  • A kind of preparation method of titanium dioxide modified polypyrrole composite nanofiltration membrane
  • A kind of preparation method of titanium dioxide modified polypyrrole composite nanofiltration membrane

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specific Embodiment approach 1

[0018] Specific embodiment one: present embodiment a kind of preparation method of titanium dioxide modified polypyrrole composite nanofiltration membrane, it is characterized in that the method comprises the following steps:

[0019] One, solvent, pore-forming agent and polyacrylonitrile are mixed, make polyacrylonitrile solution;

[0020] 2. Utilize the immersion-precipitation phase inversion method to make the polyacrylonitrile solution into an ultrafiltration base membrane, wash with deionized water for 3 to 5 times, and obtain a polyacrylonitrile base membrane;

[0021] 3. Put the polyacrylonitrile-based membrane in sodium hydroxide solution and react at 20°C-50°C for 20min-60min. After the reaction, take out the polyacrylonitrile-based membrane and soak it in deionized water for 0.5-2h , and then immersed in hydrochloric acid solution for 1 to 5 hours to obtain the treated polyacrylonitrile-based membrane;

[0022] 4. Immerse the polyacrylonitrile-based membrane treated...

specific Embodiment approach 2

[0026] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent in Step 1 is N-methylpyrrolidone. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pore-forming agent in step 1 is polyethylene glycol or polyvinylpyrrolidone. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a titanium dioxide modified polypyrole composite nanofiltration membrane, relates to methods for preparing nanofiltration membranes and aims at solving the problems that in the prior art, prepared nanofiltration membranes are low in flux and poor in interception performance. The method comprises the steps of preparing a polyacrylonitrile solution, preparing a polyacrylonitrile base membrane, preparing a polyacrylonitrile base membrane after the treatment is conducted, preparing an ultrafilteration base membrane containing pyrrole-titanium dioxide, preparing a composite nanofiltration membrane crude product, soaking the product in ethanol water, and obtaining the titanium dioxide modified polypyrole composite nanofiltration membrane. By means of the titanium dioxide modified polypyrole composite nanofiltration membrane, the hydrophilicity of the membrane is effectively adjusted and controlled, the membrane stability is improved, the membrane permeation flux is greatly raised, the obtained nanofiltration membrane has good separating performance, and the membrane is applied to the fields of antibiotic separation, fruit juice concentration and seawater desalting.

Description

technical field [0001] The invention relates to a preparation method of a nanofiltration membrane. Background technique [0002] As a necessity of life on earth, water is also the most basic element of human existence. Water resources are not only related to people's livelihood, but also restrict the sustainable development of the global economy. Therefore, the control of water resources is a necessary condition for the earth to seek survival, and it also restricts the construction of a conservation-oriented and friendly society in our country. It is conceivable that the reuse and purification of water resources need to be solved urgently. [0003] Membrane separation technology is a physical process without phase change, which has many advantages in water treatment. Therefore, in recent years, the application of membrane separation technology in water treatment has become more and more extensive, and has received widespread attention. Membrane technologies such as ultra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/42
Inventor 邵路张聪丁善刚程喜全
Owner HARBIN INST OF TECH
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