http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115245756-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aecee640f1919f7061fc432cf5343afb |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-24 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-125 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-027 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D65-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D65-10 |
| filingDate | 2021-04-28^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4d16ab37f69e9390b16e302b281f4acb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e956b6e5add7478ba1dc8b2cb8fe6144 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b58fd84a266ac02a19b8fc4a1db3909 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6acac079142bb3cd366a71c17bda43e8 |
| publicationDate | 2022-10-28^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-115245756-A |
| titleOfInvention | Composite nanofiltration membrane preparation method and composite nanofiltration membrane |
| abstract | In order to solve the problem of the separation layer of the composite nanofiltration membrane falling off, the present invention designs a preparation method of the composite nanofiltration membrane and the composite membrane prepared by the method. A method for preparing a composite nanofiltration membrane includes the following steps: Step 1: Dissolving an aldehyde crosslinking agent and a polyamine monomer in water to prepare a pretreatment aqueous solution, and immersing the base membrane in the pretreatment aqueous solution for one time to obtain surface adhesion A base film with a cross-linked layer; in step 2, the base film with the cross-linked layer attached to the surface in step 1 is first soaked in a polyethyleneimine aqueous solution for a second time, and then put into an organic phase solution containing an acid chloride monomer three times Soak, and finally obtain a highly cross-linked composite nanofiltration membrane. By constructing a layer of cross-linked layer on the base film, the present invention forms a stable chemical bond between the separation layer and the cross-linked layer on the base film, which not only indirectly ensures the connection stability of the separation layer and the base film, but also prevents the base film. The pores of the membrane are deformed due to excessive water absorption, thereby avoiding the deformation of the separation layer located on the base membrane, and avoiding affecting the desalination stability of the composite nanofiltration membrane. |
| priorityDate | 2021-04-28^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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