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Seawater desalination membrane, and making method and application thereof

A fossil and aqueous solution technology, applied in chemical instruments and methods, seawater treatment, general water supply conservation, etc., can solve problems such as poor chemical resistance, limit the development of membrane reverse osmosis technology, short life, etc., achieve high mechanical properties and improve utilization efficiency , the effect of increasing the range

Inactive Publication Date: 2016-12-21
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Preparation of seawater desalination membrane

[0025] 1) uniformly mix the aqueous solution of graphene oxide, the aqueous solution of CdS and the aqueous solution of nano-titanium oxide; the mass volume concentration of the aqueous solution of graphene oxide is 50mg / L, the mass volume concentration of the aqueous solution of nano-titanium oxide is 10mg / L, the mass volume concentration of the aqueous solution of CdS The volume concentration is 5mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.15, and the mass ratio of CdS and nano-titanium oxide is 1:0.6;

[0026] 2) Using a PP microporous membrane with an average pore size of 6.2 microns as the base, the mixture solution of graphene oxide, CdS and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then the mixture of graphene oxide, CdS and nano-titanium oxide is dehydrated on the microporous membrane base. Stacking self-assembly into a carbon-contain...

Embodiment 2

[0031] Embodiment 2: Preparation of seawater desalination membrane

[0032] 1) The aqueous solution of graphene oxide, the aqueous solution of CdS and the aqueous solution of nano titanium oxide are uniformly mixed; The aqueous solution mass volume concentration of graphene oxide is 5mg / L, the mass volume concentration of nano titanium oxide aqueous solution is 5mg / L, the aqueous solution quality of CdS The volume concentration is 10 mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.2, and the mass ratio of CdS and nano-titanium oxide is 1:0.8;

[0033] 2) With the PE microporous membrane with an average pore size of 5.9 microns as the base, the mixture solution of graphene oxide, CdS and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then the mixture of graphene oxide, CdS and nano-titanium oxide is dehydrated on the microporous membrane base. Stacking self-assembly into a carbon-containing composite layer; during the s...

Embodiment 3

[0038] Embodiment 3: Preparation of seawater desalination membrane

[0039] 1) uniformly mix the aqueous solution of graphene oxide, the aqueous solution of CdS and the aqueous solution of nano-titanium oxide; the mass volume concentration of the aqueous solution of graphene oxide is 25mg / L, the mass volume concentration of the aqueous solution of nano-titanium oxide is 20mg / L, the aqueous solution mass concentration of CdS The volume concentration is 20mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.2, and the mass ratio of CdS and nano-titanium oxide is 1:1;

[0040] 2) Based on the alumina porous membrane with an average pore size of 1.6 microns, the mixture solution of graphene oxide, CdS and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then stacked on the microporous membrane substrate Self-assembled into a carbon-containing composite layer; during the suction filtration process, another layer of PP microporous ...

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Abstract

The invention discloses a seawater desalination membrane. The seawater desalination membrane comprises one millipore filtration membrane, a carbon-containing composite layer and one millipore filtration membrane, the aperture of every millipore filtration membrane is 10 nm to 100 [mu]m, every millipore filtration membrane is made of polymer, metal or oxide, and the carbon-containing composite layer contains partially reduced graphene oxide, CdS and nanometer titanium oxide. Two sides of the composite layer are protected by the two millipore filtration membranes, so the carbon-containing composite layer have high mechanical performances, and is difficult to destroy. The carbon-containing composite layer allows water molecules to go through, and the pass rate of sodium ions, calcium ions and magnesium ions in seawater is extremely low. The seawater desalination membrane has a high desalination efficiency, and allows the salt removal rate to be 98% or above.

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] Seawater desalination has always been an important topic in scientific research and production and life. For example, on some islands in the South my country Sea, fresh water directly affects the survival of soldiers. 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 103553167A proposes a solar evaporative seawater desalination device to solve the existing seawater desalination technology's problems of large investment, high cost, high energy consumption, high requirements for seawater pretreatment, and heavy dependence on fossil and electric energy. The hydrophobic membrane of the invention is sealed and cov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00C02F1/44C02F103/08
CPCY02A20/131Y02W10/37B01D69/12B01D67/0079B01D69/02B01D2323/345B01D2325/10C02F1/444C02F2103/08
Inventor 杨卫国林镇洋
Owner JIANGSU UNIV OF SCI & TECH
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