Nano-material composite membrane for water treatment and preparation method thereof

A technology of nanomaterials and composite membranes, applied in water/sewage treatment, adsorption water/sewage treatment, light water/sewage treatment, etc., can solve the problems of affecting light transmittance, low film life, and low catalytic efficiency. To achieve the effect of improving catalytic efficiency, improving dispersion and increasing contact area

Active Publication Date: 2020-04-17
胡小青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the composite film made of powder photocatalytic oxide is used for sewage treatment, there are problems such as difficult recovery of powder, suspension of powder affecting light transmittance, etc. Agglomeration of titanium dioxide leads to problems such as small contact area, low catalytic efficiency, and short film life

Method used

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  • Nano-material composite membrane for water treatment and preparation method thereof

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Effect test

Embodiment 1

[0033] A water treatment nano material composite membrane mainly includes 65 parts of polyvinylidene fluoride, 8 parts of polyvinylpyrrolidone, 8 parts of nano titanium dioxide and 12 parts of microgel in parts by weight.

[0034] A method for preparing a water treatment nanomaterial composite membrane, the preparation method of the water treatment nanomaterial composite membrane mainly includes the following preparation steps:

[0035](1) Mix dextran and water in a flask at a mass ratio of 1:25, and add potassium periodate 0.9 times the mass of dextran into the flask, and blow nitrogen into the flask at a rate of 45mL / min, Under the condition of temperature of 35°C, after stirring for 12 hours in the dark, the oxidized dextran mixture was obtained, and the oxidized dextran mixture was mixed with a barium chloride solution with a mass fraction of 15% at a mass ratio of 1:1.5. Stir the reaction at a temperature of 40°C and a rotation speed of 300r / min for 50 minutes, filter to ...

Embodiment 2

[0043] A water treatment nano material composite membrane mainly includes 65 parts of polyvinylidene fluoride, 8 parts of polyvinylpyrrolidone, 8 parts of nano titanium dioxide and 12 parts of microgel in parts by weight.

[0044] A method for preparing a water treatment nanomaterial composite membrane, the preparation method of the water treatment nanomaterial composite membrane mainly includes the following preparation steps:

[0045] (1) Mix dextran and water in a flask at a mass ratio of 1:25, and add potassium periodate 0.9 times the mass of dextran into the flask, and blow nitrogen into the flask at a rate of 45mL / min, Under the condition of temperature of 35°C, after stirring for 12 hours in the dark, the oxidized dextran mixture was obtained, and the oxidized dextran mixture was mixed with a barium chloride solution with a mass fraction of 15% at a mass ratio of 1:1.5. Stir the reaction at a temperature of 40°C and a rotation speed of 300r / min for 50 minutes, filter to...

Embodiment 3

[0053] A water treatment nano material composite membrane mainly includes 65 parts of polyvinylidene fluoride, 8 parts of polyvinylpyrrolidone, 8 parts of nano titanium dioxide and 12 parts of microgel in parts by weight.

[0054] A method for preparing a water treatment nanomaterial composite membrane, the preparation method of the water treatment nanomaterial composite membrane mainly includes the following preparation steps:

[0055] (1) Mix dextran and water in a flask at a mass ratio of 1:25, and add potassium periodate 0.9 times the mass of dextran into the flask, and blow nitrogen into the flask at a rate of 45mL / min, Under the condition of temperature of 35°C, after stirring for 12 hours in the dark, the oxidized dextran mixture was obtained, and the oxidized dextran mixture was mixed with a barium chloride solution with a mass fraction of 15% at a mass ratio of 1:1.5. Stir the reaction at a temperature of 40°C and a rotation speed of 300r / min for 50 minutes, filter to...

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Abstract

The invention discloses a nano-material composite membrane for water treatment and a preparation method thereof, belonging to the technical field of sewage treatment. The preparation method comprisesthe following steps: firstly, oxidizing glucan with potassium periodate to prepare oxidized glucan, and then treating carbon nanotubes by using polyacrylic acid and diethylenetriamine to prepare modified carbon nanotubes; secondly, mixing and reacting oxidized glucan with polyallylamine hydrochloride and the modified carbon nanotubes to prepare a micro-gel; mixing the micro-gel with tetrabutyl titanate, and carrying out hydrolyzing and filtering to obtain a modified micro-gel; mixing the modified micro-gel with polyvinylidene fluoride and polyvinylpyrrolidone to obtain a film forming solution;and forming a film on a glass plate by using the film forming solution, uncovering the film, and carrying out washing and drying to obtain the nano-material composite membrane for water treatment. The water treatment nano-material composite membrane prepared by the method has good treatment capacity on water polluted by metal ions and organic matters.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a water treatment nanomaterial composite membrane and a preparation method thereof. Background technique [0002] With the development of industry, heavy metal pollution is becoming more and more serious. The spread of heavy metal wastewater pollution through the food chain will have a profound impact on the environment. Heavy metal wastewater pollution has gradually become a global research topic. At present, the following two basic approaches are adopted for the remediation and treatment of heavy metal pollution in water: one is to reduce the bioavailability and migration ability of heavy metals in water bodies; the other is to completely remove heavy metals from polluted water bodies, mainly in the following three categories: chemical method, physicochemical method and biological method. [0003] In the treatment of heavy metal sewage, the adsorption method in the ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J31/38B01J20/30C02F1/28C02F1/30C02F101/20
CPCB01J20/06B01J20/28033B01J31/38B01J35/004B01J35/065C02F1/285C02F1/30C02F2101/20B01J20/265B01D2325/10
Inventor 史逸尘
Owner 胡小青
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