http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108939956-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2321-28 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-027 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0093 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-68 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-02 |
| filingDate | 2018-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108939956-B |
| titleOfInvention | Preparation method of modified polyether sulfone functionally-graded composite membrane |
| abstract | A preparation method of a modified polyethersulfone functionally-graded composite membrane mainly comprises the steps of performing chloroacetylation treatment on polyethersulfone twice, performing chemical bonding reaction on the chloroacetylated polyethersulfone, diethylenetriamine pentaacetic acid and diethylenetriamine to prepare a membrane casting solution for carrying a polyaminocarboxylic acid functional group polyethersulfone functionally-graded separation membrane, performing membrane formation by applying a phase transfer technology, coating a polyethyleneimine/piperazine aqueous solution and a trimesoyl chloride n-heptane solution on the surface of the separation membrane, and performing interfacial polymerization reaction to form a compact nanofiltration ultrathin layer to obtain the modified polyethersulfone functionally-graded composite membrane. The method is simple, convenient and feasible, the coating process of the nanofiltration ultrathin layer is environment-friendly, the prepared polyether sulfone functional gradient separation membrane realizes gradient treatment of pollutants, and finally, water polluted by high-concentration heavy metal can be directly discharged or recycled after being treated by the polyether sulfone functional gradient separation membrane, so that the engineering construction cost is effectively reduced, and the method has a better engineering application prospect. |
| priorityDate | 2018-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.