http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110681272-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2379-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2479-08 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-362 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0002 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-64 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/B01D61-36 |
| filingDate | 2018-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110681272-B |
| titleOfInvention | Polyimide pervaporation membrane and preparation method thereof |
| abstract | The invention relates to a polyimide pervaporation membrane and a preparation method thereof, and mainly solves the problems that in the prior art, the pervaporation membrane is poor in solvent resistance, low in separation efficiency, short in service life and difficult to separate strong-polarity solvents. The invention provides a polyimide pervaporation membrane, which comprises a supporting layer and a separating layer; the separation layer is positioned on the support layer, the separation layer is a multilayer polyimide film, and the support layer is an inorganic substance or an organic substance with a pore structure of more than 0.01 mu m; the multilayer polyimide film is characterized in that the multilayer polyimide film is obtained by imidizing a polyamic acid film prepared by at least two solvent removal methods, and the other layers except the first layer in contact with the supporting layer adopt the technical scheme of the solvent removal method of diffusing in poor solvent of polyamic acid, so that the problem is solved well, and the multilayer polyimide film can be used for industrial application of polyimide pervaporation films. |
| priorityDate | 2018-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.