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Carbon-containing composite film, preparation method and application thereof

A composite membrane and carbon composite technology, which is applied in the field of ion separation, can solve the problems of poor chemical resistance, short life, and limit the development of membrane reverse osmosis technology, and achieve high mechanical properties and high efficiency.

Inactive Publication Date: 2016-10-12
镇江市丹徒区硕源材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, at present, organic polyamine membranes are widely used in membrane reverse osmosis technology, which has poor chemical resistance and short life, which limits the development of membrane reverse osmosis technology.
In addition, its desalination efficiency is not high, resulting in low practicality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) The aqueous solution of graphene oxide and the aqueous solution of ZnS are evenly mixed; the volume mass concentration of the aqueous solution of graphene oxide is 50 mg / L, and the volume mass concentration of the aqueous solution of ZnS is 5 mg / L; the mass ratio of graphene oxide and ZnS is 1: 0.15;

[0027] 2) Based on the PP microporous filter membrane with an average pore size of 6.2 microns, the mixture solution of graphene oxide and ZnS is dehydrated under negative pressure by vacuum filtration method, and then stacked and self-assembled on the microporous membrane substrate. Carbon-containing composite layer; during the suction filtration process, another layer of PE microporous filter membrane with an average pore size of 0.32 microns is coated on the carbon-containing composite layer to form a composite membrane with a sandwich structure;

[0028] 3) Dry the sandwich-structured composite film at 80°C for 14 hours;

[0029] 4) After 3 days of ultraviolet lig...

Embodiment 2

[0032] 1) Mix the aqueous solution of graphene oxide and the aqueous solution of ZnS evenly; the volume mass concentration of the aqueous solution of graphene oxide is 5 mg / L, and the volume mass concentration of the aqueous solution of ZnS is 10 mg / L; the mass ratio of graphene oxide and ZnS is 1: 0.2;

[0033] 2) Based on the alumina porous membrane with an average pore size of 0.022 microns, the mixture solution of graphene oxide and ZnS is dehydrated under negative pressure by vacuum filtration, and then stacked and self-assembled on the microporous membrane substrate to form a Carbon composite layer; in the suction filtration process, another layer of PP microporous filter membrane with an average pore size of 0.01 microns is coated on the carbon-containing composite layer to form a composite membrane with a sandwich structure;

[0034] 3) Dry the sandwich-structured composite film at 40°C for 4 hours;

[0035] 4) After 3 days of ultraviolet light irradiation, the graphe...

Embodiment 3

[0038] 1) Mix the aqueous solution of graphene oxide and the aqueous solution of ZnS evenly; the volume mass concentration of the aqueous solution of graphene oxide is 25 mg / L, and the volume mass concentration of the aqueous solution of ZnS is 20 mg / L; the mass ratio of graphene oxide and ZnS is 1: 0.2;

[0039] 2) Based on the PP microporous filter membrane with an average pore size of 2.1 microns, the mixture solution of graphene oxide and ZnS is dehydrated under negative pressure by vacuum filtration, and then stacked and self-assembled on the microporous membrane substrate. Carbon-containing composite layer; during the suction filtration process, another layer of PP microporous filter membrane with an average pore size of 8.6 microns is coated on the carbon-containing composite layer to form a composite membrane with a sandwich structure;

[0040] 3) Dry the sandwich-structured composite membrane at 40°C for 24 hours;

[0041] 4) After irradiating with ultraviolet light ...

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PUM

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Abstract

The invention discloses a carbon-containing composite film, which is composed of a microporous filter membrane, a carbon-containing composite layer and a microporous filter membrane in order. The aperture of the microporous filter membrane is 10nm-100micrometers, the microporous filter membrane is made of a macromolecule, metal or oxide, and the carbon-containing composite layer contains partially reduced graphene oxide and ZnS. Because of the protection of the two layers of microporous filter membranes at two sides, the composite film provided by the invention has high mechanical properties, can ensure that the carbon-containing composite layer is not easy to damage. The carbon-containing composite layer can allow water molecules to pass, but sodium ions, calcium ions, magnesium ions and the like in seawater have very low passing rate. The carbon-containing composite film provided by the invention has high desalination efficiency, and can reach a removal rate equal to or more than 98%.

Description

technical field [0001] The invention relates to the field of ion separation, in particular to a carbon-containing composite membrane and its preparation method and application. Background technique [0002] Seawater desalination has always been an important topic in scientific research and production and life. Especially at a time when fresh water resources are becoming more and more scarce. At present, seawater desalination is mainly based on distillation technology, such as thermal multi-stage flash evaporation, thermal multiple-effect distillation and other technologies. [0003] Chinese invention patent 105236610A discloses an integrated device for seawater desalination, which belongs to the field of seawater desalination treatment. The integrated device includes a seawater storage tank, a seawater inlet pump, a security filter, an ultrafiltration membrane module, a backwash pump, an intermediate water tank, an intermediate water pump, Concentrated water storage tank, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00C02F1/44C02F1/30
CPCY02A20/131B01D69/12B01D67/0079B01D67/009B01D67/0095B01D2323/345C02F1/30C02F1/444C02F2101/10C02F2103/08C02F2305/10
Inventor 不公告发明人
Owner 镇江市丹徒区硕源材料科技有限公司
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