http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114425238-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02A20-131 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-18 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-56 |
| filingDate | 2022-01-19^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-11-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-11-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114425238-B |
| titleOfInvention | Pollution-resistant and chlorine-resistant bifunctional polyamide composite reverse osmosis membrane and preparation method thereof |
| abstract | The invention belongs to the technical field of organic membrane materials, and specifically relates to a pollution-resistant and chlorine-resistant dual-functional polyamide composite reverse osmosis membrane and a preparation method thereof. The polyamide composite reverse osmosis membrane includes a porous ultrafiltration membrane support layer, a ternary polyamide Separation layer and surface modification layer. Among them, the surface modification layer contains both stain-resistant groups and chlorine-resistant groups, and the two are connected by covalent bonds; the ternary polyamide separation layer is formed by interfacial polymerization of aromatic polyacyl chlorides, aromatic polyamines, and organic coupling agents. The amino side of the organic coupling agent participates in the interfacial polymerization reaction and is covalently connected to the aromatic polyamide skeleton, and the unsaturated alkane side is covalently connected to the chlorine-resistant group in the surface modification layer, thereby separating the separation layer from the surface modification layer. Link together, and increase the number of active sites available for modification on the surface of the polyamide separation layer. The zwitterion and thioether groups in the surface modification layer play the role of anti-fouling and chlorine resistance respectively, effectively ensuring the stability of the polyamide composite reverse osmosis membrane during operation. |
| priorityDate | 2022-01-19^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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