http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110655661-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2433-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K3-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K2201-011 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2333-26 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-075 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F222-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-075 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 |
| filingDate | 2019-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110655661-B |
| titleOfInvention | Preparation method of polyacrylic acid-polyacrylamide double-network hydrogel |
| abstract | The invention discloses a preparation method of polyacrylic acid/polyacrylamide double-network hydrogel, belonging to the technical field of petroleum drilling plugging. The preparation method comprises the following steps: (1) preparing a silicon dioxide suspension; (2) mixing a certain amount of acrylic acid, N-N dimethylacrylamide, a cross-linking agent and distilled water, adding a silicon dioxide suspension and an initiator to prepare a first mixed solution, and carrying out water bath to prepare a single-network hydrogel; (3) and mixing a certain amount of acrylamide, a crosslinking agent, an initiator and distilled water to prepare a second mixed solution, soaking the single-network hydrogel in the second mixed solution, and carrying out water bath reaction to prepare the double-network hydrogel. The invention adopts a two-step aqueous solution method for preparation, water bath heating polymerization reaction is carried out, the reaction is carried out under mild conditions, and the obtained double-network hydrogel has good temperature resistance, pressure resistance and water absorption. |
| priorityDate | 2019-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.