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Desalination membrane and preparation method and application thereof

A microporous filtration membrane and nano-titanium oxide technology, applied in the field of ion separation, can solve the problems of short life, limited development of membrane reverse osmosis technology, poor chemical resistance, etc., and achieve the effect of improving utilization efficiency, high mechanical properties and high efficiency

Inactive Publication Date: 2016-11-23
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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

[0026] Example 1: Preparation of Desalination Membrane

[0027] 1) the aqueous solution of graphene oxide, the aqueous solution of ZnS, the aqueous solution of NbN and the aqueous solution of nano titanium oxide are evenly mixed; the aqueous solution mass concentration of graphene oxide is 50mg / L, and the mass volume concentration of nano titanium oxide aqueous solution is 10 mg / L, The mass volume concentration of the aqueous solution of ZnS is 5mg / L; the mass volume concentration of the NbN aqueous solution is 10mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.15, and the mass ratio of the ZnS and nano-titanium oxide is 1:1: 0.6, the mass ratio of NbN and nano-titanium oxide is 1:1;

[0028] 2) Using the PP microporous membrane with an average pore diameter of 2 microns as the base, the mixture solution of graphene oxide, ZnS, NbN, and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then in the microporous membrane. Th...

Embodiment 2

[0033] Example 2: Preparation of Desalination Membrane

[0034] 1) the aqueous solution of graphene oxide, the aqueous solution of ZnS, the aqueous solution of NbN and the aqueous solution of nano titanium oxide are uniformly mixed; the aqueous solution mass concentration of graphene oxide is 5mg / L, and the mass volume concentration of nano titanium oxide aqueous solution is 5mg / L, The mass volume concentration of the aqueous solution of ZnS is 10 mg / L, and the mass volume concentration of the NbN aqueous solution is 20 mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.2, and the mass ratio of the ZnS and nano-titanium oxide is 1: 0.8, the mass ratio of NbN and nano-titanium oxide is 1:1;

[0035] 2) Using the PE microporous filter membrane with an average pore size of 0.8 microns as the base, the mixed solution of graphene oxide, ZnS, NbN and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then the microporous filter mem...

Embodiment 3

[0040] Example 3: Preparation of Desalination Membrane

[0041]1) the aqueous solution of graphene oxide, the aqueous solution of ZnS, the aqueous solution of NbN and the aqueous solution of nano-titanium oxide are uniformly mixed; the aqueous solution mass concentration of graphene oxide is 25mg / L, and the mass volume concentration of nano-titanium oxide aqueous solution is 20mg / L, The mass volume concentration of the aqueous solution of ZnS is 20 mg / L, and the mass volume concentration of the NbN aqueous solution is 20 mg / L; the mass ratio of graphene oxide and nano-titanium oxide is 1:0.2, and the mass ratio of the ZnS and nano-titanium oxide is 1: 1. The mass ratio of NbN and nano-titanium oxide is 1:1;

[0042] 2) Using the PP microporous membrane with an average pore size of 0.2 microns as the base, the mixed solution of graphene oxide, ZnS, NbN and nano-titanium oxide is dehydrated under negative pressure by vacuum filtration, and then the microporous membrane substrate...

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Abstract

The invention discloses a desalination membrane which is sequentially composed of a first microfiltration membrane, a carbonic composite layer and a microfiltration membrane. The bore diameter of each of the microfiltration membranes ranges from 10nm to 100mum, the microfiltration membranes are made from macromolecule, metal or oxide materials, and the carbonic composite layer contains grapheme oxide, ZnS, NbN and nano-titanium oxide which are partially reduced. The invention further discloses a preparation method and application of the desalination membrane. The desalination membrane is protected through the microfiltration membranes on two sides, so that mechanical property is high, and the carbonic composite layer can be assured not to be destroyed easily; by the adoption of the carbonic composite layer, water molecules can be allowed to pass through while sodium, calcium ion, magnesium ion and the like in the seawater are quite low in pass rate. The desalination membrane is high in desalination efficiency and the removal rate is more than 96%.

Description

technical field [0001] The invention relates to the field of ion separation, in particular to a desalination membrane and a preparation method and application thereof. Background technique [0002] Seawater desalination has always been an important subject in scientific research and production and life. Especially at a time when freshwater resources are becoming increasingly scarce. At present, seawater desalination is mainly based on distillation technology, such as thermal multi-stage flash distillation, thermal multi-effect distillation and other technologies. [0003] Chinese invention patent 105236610A discloses a seawater desalination integrated equipment, which belongs to the field of seawater desalination treatment. Concentrated water storage tank, fresh water storage tank, extremely water storage tank, concentrated water circulation pump, fresh water circulation pump, extremely water circulation pump, electric drive membrane stack, rectifier, high pressure pump, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/14B01D67/00C02F1/44C02F103/08
CPCY02A20/131B01D69/02B01D67/009B01D69/145B01D2323/345B01D2325/10C02F1/444C02F2103/08
Inventor 杨卫国杨志轩
Owner JIANGSU UNIV OF SCI & TECH
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