Preparation method for forming magnetite nanoparticles in cellulose acetate membrane

A cellulose acetate membrane and nanoparticle technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as low flux of CA membrane, increase hydrophilicity, and maintain physical and chemical stability. sexual effect

Inactive Publication Date: 2020-02-25
广州市思创信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dense surface layer and the low porosity of the sublayer of the cellulose acetate membrane lead to the low flux of the CA membrane.

Method used

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  • Preparation method for forming magnetite nanoparticles in cellulose acetate membrane
  • Preparation method for forming magnetite nanoparticles in cellulose acetate membrane
  • Preparation method for forming magnetite nanoparticles in cellulose acetate membrane

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Embodiment Construction

[0034] The present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.

[0035] The first step is to prepare a cellulose acetate membrane. 8-Hydroxyquinoline and cellulose acetate were dissolved in acetone, and polyvinylpyrrolidone (PVP, MW=25000g / mol) was added as a pore-forming agent, and mechanically stirred for 5 hours to prepare a coating solution. Keep the prepared cellulose solution in acetone in the production environment for a period of time to remove the air bubbles generated by the cellulose solution during the production process.

[0036] The concentrations of polyvinylpyrrolidone and cellulose acetate are selected to be 1-1.5% and 17% respectively.

[0037] In the second step, after adding 8-hydroxyquinoline, use a casting knife to perform solution casting on the glass plate substrate, and place the glass plate in a non-solvent at 18°C ​​to 25°C.

[0038] The concentration of 8-hydroxyquinoline is...

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Abstract

The invention relates to a preparation method for forming magnetite nanoparticles in a cellulose acetate membrane. The preparation method comprises: preparing a cellulose acetate membrane; adding 8-hydroxyquinoline, and casting the solution on a glass plate base material through a casting knife; washing the prepared membrane, and soaking in water; drying the film; violently mixing a polyvinyl alcohol polymer, and dissolving in water to obtain a uniform solution; adding ferric chloride, and dropwisely adding sodium hydroxide into the mixed solution; carrying out ultrasonic treatment on the solution through an ultrasonic instrument oscillator, and breaking the material aggregate; and immersing the cellulose acetate membrane into the nanometer composite material solution, discharging the excessive solution, and drying to obtain the cellulose acetate membrane. According to the invention, the membrane prepared by adopting the preparation method is improved in ion removal performance, improved in membrane surface hydrophilicity, good in adsorption performance and mechanical integrity, and capable of being repeatedly used.

Description

technical field [0001] The invention relates to sewage treatment materials, in particular to a preparation method for forming magnetite nanoparticles in a cellulose acetate film. Background technique [0002] As a result of wastewater generated by various industries, including electronics, metallurgy, stainless steel manufacturing, and electroplating discharge, a large amount of wastewater containing heavy metals is discharged into water, which has drawn alarming attention to environmental issues. Heavy metal ions are non-degradable and stable, can accumulate in organisms and pose great ecological and physiological risks. Therefore, it is very important to protect the environment to effectively remove heavy metals from industrial wastewater before discharging them into the environment. Recently, membrane adsorption has been used as a suitable method for the removal of metal ions from aqueous solutions. Adsorbent membranes containing abundant binding sites offer several adv...

Claims

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Application Information

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IPC IPC(8): B01D71/52B01D69/02B01D67/00B01J20/26B01J20/28C02F1/28C02F1/44B01J20/30C02F101/20
CPCB01D67/0079B01D69/02B01D71/52B01J20/06B01J20/264B01J20/28009B01J20/28033C02F1/281C02F1/285C02F1/44C02F2101/20
Inventor 不公告发明人
Owner 广州市思创信息技术有限公司
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