Polymer/inorganic nanometer composite separation membrane and preparation method thereof

An inorganic nanometer and separation membrane technology, which is applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve problems such as structural defects in the membrane, easy agglomeration of nanomaterials, poor selectivity, etc., and achieve simple preparation process operation Ease of operation, increased selectivity and transmittance, and controllable orientation of nanomaterials
CN101983758AInactive Publication Date: 2011-03-09SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Publication Date
2011-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a polymer / inorganic nanometer composite separation membrane and a preparation method thereof. The composite separation membrane consists of a solid matrix of polymer materials and conductive nanomaterials uniformly distributed in the above matrix according to a certain orientation. In the preparation method, conductive nanomaterials which can be arrayed in a certain orientation are uniformly distributed in a film-forming macromolecular material solution. Then electric field is applied during the film-formation process of the mixed solution. The conductive nanomaterials are aligned to the direction of electric field in the film to form the polymer / inorganic nanometer composite separation membrane. The separation membrane has a greater area and smooth surface, controllable film thickness and strength, steerable nanomaterial density and orientation, good selectivity, high transmittance for selected gas and liquid molecules. The method of the invention has the characteristics of simple preparation, easy operation and low cost. The invention can be widely used in the fields of large-scale isolation and purification of gas and large-scale filtration and separation of liquid.
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Description

technical field

[0001] The invention particularly relates to a polymer / inorganic nanocomposite separation membrane and a preparation process thereof in the technical field of material preparation. Background technique

[0002] Due to its high efficiency, low cost, and no secondary pollution, membrane separation technology has aroused widespread interest and has been applied in the fields of gas separation and purification, biomacromolecule separation, sewage purification, seawater desalination, petrochemical and coal chemical industries. However, the polymer separation membranes prepared by traditional methods, according to Robesen’s theory, have the defect of contradictory selectivity and transmittance, and it is difficult to achieve the simultaneous increase of selectivity and transmittance, which makes the polymer separation membranes in the actual use process low efficiency. Therefore, there is an urgent need to develop separation membranes that can simultaneously impro...

Claims

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