http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113413776-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-027 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-442 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-02 |
| filingDate | 2021-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113413776-B |
| titleOfInvention | A kind of preparation method of nanofiltration membrane based on polyamidoxime as boundary layer |
| abstract | The invention provides a method for preparing a nanofiltration membrane based on polyamide oxime as a boundary layer, and belongs to the field of nanofiltration membrane preparation. The present invention utilizes polyamidoxime rich in amidoxime groups as the organic boundary layer, which can significantly enhance the hydrophilicity of the surface of the support layer, and is beneficial to the uniform spreading of the aqueous solution of piperazine, a water-phase monomer, on the boundary layer. Small pore size, dense, thin PA layer, and polyamide oxime can produce hydrogen bond and Lewis acid-base interaction with piperazine, effectively inhibit the diffusion of piperazine to the oil phase solution, cause the instability of interfacial polymerization, and form surface The PA layer with strong electronegativity and folds significantly increases the effective permeation area, and the reduction of the thickness of the PA layer and the increase of its effective permeation area increase the permeation transmission channels of the final nanofiltration membrane. , the transmission resistance is reduced, and the permeation flux is greatly increased. At the same time, the strong electronegativity and small surface pore size of the PA layer surface improve the solute retention rate. |
| priorityDate | 2021-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.