Method of preparing multiwall carbon nano-tubes/polyvinylidene fluoride porous film material via ultrasonic-assisted phase inversion process

A technology of multi-walled carbon nanotubes and polyvinylidene fluoride, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as limited application, achieve short time consumption and widen application Field, simple operation effect

Inactive Publication Date: 2018-06-01
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, PVDF membranes still have some problems that limit their application in other fields, especially in wastewater treatment, biological separation, water purification and separation, etc.

Method used

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  • Method of preparing multiwall carbon nano-tubes/polyvinylidene fluoride porous film material via ultrasonic-assisted phase inversion process

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Embodiment 1

[0026] The preparation of multi-walled carbon nanotube / polyvinylidene fluoride porous membrane material, the steps are as follows:

[0027] (1) Preparation of casting solution

[0028] A certain amount of MWCNTs was weighed, and N,N_dimethylformamide (DMF) was used as a solvent, and the MWCNTs were dispersed uniformly by ultrasonication. The polyvinylidene fluoride (PVDF) powder is dried in an oven for a period of time before use to remove moisture. Add PVDF powder into the MWCNT / DMF system to form a casting solution, heat and stir to fully dissolve the PVDF powder to obtain a uniform solution. The resulting casting solution was sealed and allowed to stand at room temperature overnight for degassing.

[0029] (2) Preparation of MWCNT / PVDF porous membrane materials by ultrasonic-assisted phase inversion method

[0030] Scrape the film with a scraper on the glass plate, then put the film and the glass plate together into an ultrasonic instrument, and perform ultrasonic treatm...

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Abstract

The invention relates to a method of preparing a multiwall carbon nano-tubes/polyvinylidene fluoride porous film material via an ultrasonic-assisted phase inversion process. The method includes stepsof: 1) adding MWCNTs to DMF and performing ultrasonic dispersion until complete uniform dispersion, adding PVDF powder to the MWCNT/DMF system and heating and stirring the mixture to form a homogenousfilm-casting liquid, sealing the film-casting liquid, allowing the film-casting liquid to stand at room temperature overnight for removing foams; 2) scrape-coating the liquid on a glass board to forma film, placing the glass board along with the film into an ultrasonic instrument to perform ultrasonic treatment at different power, frequency and ultrasonic time, placing the glass board in distilled water bath to volatile the solvent, thus forming the MWCNT/DMF porous film material; and 3) drying the MWCNT/DMF porous film material in a vacuum drying box and storing the product.

Description

technical field [0001] The invention relates to a multi-walled carbon nanotube / polyvinylidene fluoride porous membrane material prepared by an ultrasonic-assisted phase inversion method, and belongs to the technical field of functional materials. Background technique [0002] PVDF membrane has many excellent properties such as high mechanical strength, UV resistance, weather aging resistance, impact resistance, wear resistance, heat resistance, acid, alkali and halogen chemical reagents and other excellent properties. In recent years, PVDF membrane has been widely used in Many fields such as chemical industry, environmental protection, food, medicine and biochemistry. However, there are still some problems in PVDF membrane itself that limit its application in other fields, especially in the fields of wastewater treatment, biological separation, water purification and separation. [0003] Carbon nanotubes are one-dimensional tubular nanomaterials composed of carbon atoms, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26C02F1/28C02F101/30C02F101/36C02F101/38
CPCB01J20/205B01J20/261B01J20/28033B01J20/28054B01J20/28069C02F1/28C02F1/281C02F1/285C02F2101/308C02F2101/36C02F2101/38C02F2101/40
Inventor 李广芬李志鹏郇洋洋蒋策李万盛
Owner TIANJIN POLYTECHNIC UNIV
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