http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107913604-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2323-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-38 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0013 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0011 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-447 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-44 |
| filingDate | 2017-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107913604-B |
| titleOfInvention | Preparation method of PVDF/PVDF-HFP hollow fiber membrane |
| abstract | The invention relates to a preparation method of a PVDF/PVDF-HFP hollow fiber membrane, wherein a membrane casting solution is a mixed solution of PVDF, PVDF-HFP, a polar solvent and an additive; the molecular weight of the PVDF is 30-32 ten thousand; the molecular weight of PVDF-HFP is 39-41 ten thousand; in the casting solution, the mass percentages of PVDF, PVDF-HFP, polar solvent and additive are respectively 10.5-15%, less than 4.5%, 73-77% and 8-12%; both the core liquid and the external condensate are alcohol-water solutions; the casting solution and the core solution are respectively sprayed into the outer coagulation solution from the middle hole and the inner hole of the double-hole spinning nozzle to be subjected to phase change forming to obtain membrane wires; washing and drying the membrane filaments to obtain the hollow fiber membrane. Through a large amount of researches, the inventor discovers that the cooperation of PVDF and PVDF-HFP in the mass and the proportion can be used for preparing a hollow fiber membrane which has the advantages of good appearance, excellent hydrophobic property and good mechanical strength. |
| priorityDate | 2017-09-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.