http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114191989-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a4e418a1fcaf49f89e778a1b0ca9e593 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-30 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0011 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-027 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-125 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0013 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-02 |
| filingDate | 2021-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3b16107556055a79af536b0d9d21b677 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_358c89c6691c6982c0c86a0ae3287be6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a6b61d83343188cedbdfc9a61f7d2d69 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_626e8b4df33e1fe8c1ff583812f5aded http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7e86de278289f5f5714291e60d0f2bf5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f9b77d64118c1d92a897c5675d107f8e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8bbdad3b64a80e878db1a940f2bfb123 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_464278d5271ef9b855bed84b12c4196a |
| publicationDate | 2022-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114191989-A |
| titleOfInvention | Preparation method of strongly-combined double-layer nanofiltration membrane |
| abstract | The invention discloses a preparation method of a strongly-combined double-layer nanofiltration membrane, which comprises the following steps: firstly, carboxyl-terminated SMA macromolecules are obtained, and then carboxylated SMA and a polymer film material are blended to form a homogeneous film casting solution; step two, preparing the casting solution into a surface carboxylation ultrafiltration membrane material by using a phase inversion method; adding a polyhydroxy polymer on the surface of the surface carboxylation ultrafiltration membrane material, and performing esterification reaction on the polyhydroxy polymer and carboxyl to obtain a single-layer structure nanofiltration membrane; and step four, adding a linear diacyl chloride monomer on the surface of the nanofiltration membrane with the single-layer structure for secondary crosslinking to obtain the strongly-combined double-layer nanofiltration membrane. The method has the characteristics of simple and convenient operation, strong binding force between the composite layers of the prepared nanofiltration membrane, excellent separation performance and the like. Compared with the traditional interfacial polymerization method for preparing the polyamide nanofiltration membrane, the method can obtain the nanofiltration membrane with the surface having the double-layer separation structure through secondary reaction. The product obtained by the method has the characteristics of excellent permeability, good chlorine resistance and high pressure resistance. |
| priorityDate | 2021-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.