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Seawater desalination membrane and preparation method and application thereof

A fossil and water solution technology, applied in chemical instruments and methods, seawater treatment, general water supply saving, etc., can solve the problems of poor chemical resistance, short life, low filtration effect, etc., and achieve the effect of good practicability and high efficiency

Inactive Publication Date: 2020-05-01
SHENZHEN LINGZHUO INTELLIGENCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, organic polyamine membranes are widely used in membrane reverse osmosis technology, which has poor chemical resistance, short life, and low filtering effect, which limits the development of membrane reverse osmosis technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Preparation of seawater desalination membrane

[0020] 1) The aqueous solution of graphene oxide, CdS, Fe 2 The aqueous solution of Cl is uniformly mixed; the volume mass concentration of the graphene oxide aqueous solution is 50 mg / L, and the volume mass concentration of the CdS aqueous solution is 5 mg / L; 2 The volume concentration of the aqueous solution of Cl is 10mg / L; graphene oxide, CdS, Fe 2 The mass ratio of Cl is 1:0.15:0.02, stir evenly;

[0021] 2) Using a nano-alumina membrane with an average pore size of 50 nanometers as a template, the above solution is dehydrated under negative pressure by vacuum filtration, and filled into the nanopores in the alumina membrane;

[0022] 3) Dry the composite film at 40°C for 24 hours;

[0023] 4) After irradiating with ultraviolet light for 12 hours, the divalent Fe just disappeared completely by XPS measurement, and the light was stopped to finally obtain the seawater desalination membrane.

[0024] Pr...

Embodiment 2

[0025] Embodiment 2: Preparation of seawater desalination membrane

[0026] 1) The aqueous solution of graphene oxide, CdS, Fe 2 The aqueous solution of C is uniformly mixed; the aqueous solution volume concentration of graphene oxide is 5mg / L, and the aqueous solution volume concentration of CdS is 10mg / L; 2 The volume concentration of the aqueous solution of Cl is 30mg / L; graphene oxide, CdS, Fe 2 The mass ratio of Cl is 1:0.2:0.03, stir evenly;

[0027] 2) Using a nano-alumina membrane with an average pore size of 70 nanometers as a template, the above solution is dehydrated under negative pressure by vacuum filtration, and filled into the nanopores in the alumina membrane;

[0028] 3) Dry the composite film at 40°C for 24 hours;

[0029] 4) After irradiating with ultraviolet light for 15 hours, it was measured by XPS that the divalent Fe just disappeared completely, and the light was stopped to finally obtain a seawater desalination film with a thickness of 100 nanomete...

Embodiment 3

[0031] Embodiment 3: Preparation of seawater desalination membrane

[0032] 1) The aqueous solution of graphene oxide, CdS, Fe 2 The aqueous solution of C is uniformly mixed; the volume mass concentration of the aqueous solution of graphene oxide is 25mg / L, and the volume mass concentration of the aqueous solution of CdS is 20mg / L; 2 The volume concentration of the aqueous solution of Cl is 20mg / L; graphene oxide, CdS, Fe 2 The mass ratio of Cl is 1:0.1:0.03, stir evenly;

[0033] 2) Using a nano-alumina membrane with an average pore diameter of 80 nanometers as a template, the above solution is dehydrated under negative pressure by vacuum filtration, and filled into the nanopores in the alumina membrane;

[0034] 3) Dry the composite film at 40°C for 24 hours;

[0035] 4) After irradiating with ultraviolet light for 17.5 hours, it was measured by XPS that the divalent Fe just disappeared completely, and the light was stopped, and finally a seawater desalination film with a...

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Abstract

The invention discloses a carbon-containing seawater desalination membrane, which is prepared by preparing partially reduced graphene in gaps by using a nano-alumina porous membrane as a template, canallow water molecules to pass through, has extremely low passing rate of sodium ions, calcium ions, magnesium ions and the like in seawater, and has high desalination efficiency.

Description

technical field [0001] The invention relates to the field of ion separation, in particular to a seawater desalination membrane and its preparation method and application. Background technique [0002] The subject of seawater desalination has important theoretical and practical value. On some islands, the supply of fresh water is a big problem, which directly affects the survival of soldiers and the number of garrisons. At present, seawater desalination is mainly based on distillation technology, and the technology of directly using membranes to prepare fresh water is not yet mature in industry. [0003] Desalination of seawater using membrane reverse osmosis technology has long been pursued because of its low cost, flexibility, and low energy consumption. However, at present, organic polyamine membranes are widely used in membrane reverse osmosis technology, which has poor chemical resistance, short life, and low filtering effect, which limits the development of membrane r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/02C02F1/44C02F103/08
CPCB01D67/0044B01D69/02B01D71/021B01D71/025C02F1/441C02F2103/08Y02A20/131
Inventor 何祚曹令花其他发明人请求不公开姓名
Owner SHENZHEN LINGZHUO INTELLIGENCE CO LTD
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