Carbon nano tube surface modification hollow fiber membrane preparation method and application thereof
A technology of carbon nanotubes and surface modification, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems such as difficult to meet the requirements of anaerobic electrochemical membrane bioreactor for sewage treatment, poor binding force, etc. Achieve the effects of alleviating membrane fouling, prolonging service life, and being easy to install and operate
Inactive Publication Date: 2020-01-17
BEIJING UNIV OF TECH
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Problems solved by technology
[0007] The present invention mainly aims at the problem of membrane fouling in the field of sewage treatment and the shortcomings of the technology of preparing carbon nanotube surface coated modified hollow fiber membranes by the filtration coating method, that is, carbon nanotubes are coated with carbon nanotubes in organic hollow fiber membrane modules. The binding force between the tube and the matrix membrane is poor, and it is difficult to meet the needs of the anaerobic electrochemical membrane bioreactor for sewage treatment. A method for preparing a carbon nanotube surface-modified hollow fiber membrane and a new carbon nanotube anaerobic membrane are provided. Oxygen Electrochemical Membrane Bioreactor System
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[0037] Preparation of carbon nanotube surface modified hollow fiber membrane, namely HF-PVDF-CNT membrane, the specific steps are as follows:
[0038] The first step is to soak the polyvinylidene fluoride hollow fiber membrane in an ethanol solution with a volume fraction of 50% for 12 hours, rinse it with ultrapure water after taking it out, and dry it naturally; the pore diameter of the polyvinylidene fluoride hollow fiber membrane is 0.4 μm, purchased from Mitsubishi Rayon Corporation, Japan.
[0039] In the second step, put 1000ml of ultrapure water into the beaker and heat it to 50°C. At a temperature of 45-50°C, add 10ml of surfactant Triton X-100, ultrasonically disperse for 30min, add carboxylated multi-walled carbon nanotube powder 750mg, ultrasonically disperse for 30min, stir for 12h, add dopamine 100mg, ultrasonically disperse for 30min After the sonication, add 100ml of HCl-Tris solution. After stirring for 24 hours, ultrasonication was performed for 30 minutes ...
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Abstract
The invention discloses a carbon nano tube surface modification hollow fiber membrane preparation method and application thereof. The membrane preparation method is characterized in that the technicalproblem that a carbon nano tube cannot be back washed after a hollow fiber membrane surface is coated outside a carbon nano tube layer is solved; the method is simple, flexible, controllable and highin practicability; and a carbon nano tube surface modification hollow fiber membrane has favorable stability and anti-pollution performance. The carbon nano tube surface modification hollow fiber membrane is externally applied with voltage so as to be applied to an anaerobic membrane bioreactor, so that a novel carbon nano tube anaerobic electrochemical membrane bioreactor system is built. The system device is simple in structure, easy to operate and assemble, excellent in anti-pollution performance and high in COD removal efficiency.
Description
technical field [0001] The invention relates to a method for preparing a carbon nanotube surface-modified hollow fiber membrane and its application, and relates to the field of organic hollow fiber membranes. At the same time, a new type of carbon nanotube anaerobic electrochemical membrane bioreactor was established by using carbon nanotube surface modified hollow fiber membrane, and its operation method was clarified, involving the fields of sewage treatment and resource utilization. Background technique [0002] Anaerobic membrane bioreactor (AnMBR) sewage treatment process is a sewage treatment technology that combines anaerobic biological sewage treatment and membrane separation to successfully achieve mud-water separation. However, the high energy consumption caused by membrane fouling severely limits the development of anaerobic membrane bioreactors. The introduction of microbial electrolysis cells, namely anaerobic electrochemical membrane bioreactor (AnEMBR) has be...
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IPC IPC(8): B01D71/82B01D69/08B01D67/00C02F3/00
CPCB01D67/0079B01D69/08B01D71/82C02F3/005
Inventor 张岩曹孟京刘子奇陈昌明陈锋华柴毓曼郭佳瑞
Owner BEIJING UNIV OF TECH