Njengengxube ebaluleke kakhulu ekwakheni imikhiqizo yodaka oluxutshwe okomile, i-cellulose ether idlala indima ebalulekile ekusebenzeni kanye nezindleko zodaka oluxutshwe okomile. Kunezinhlobo ezimbili ze-cellulose ethers: eyodwa i-ionic, njenge-sodium carboxymethyl cellulose (CMC), kanti enye i-non-ionic, njenge-methyl cellulose (MC), i-hydroxyethyl cellulose (HEC), i-Hydroxypropyl cellulose (HPMC), njll. . Ngokukhula kokuthandwa kokusetshenziswa kwemikhiqizo yodaka oluxutshwe owomile, izwe lami lizoba umkhiqizi omkhulu emhlabeni wonke wodaka oluxutshwe owomile, ukusetshenziswa kwe-cellulose ether kuzokwanda, futhi abakhiqizi balo nezinhlobonhlobo zemikhiqizo nazo zizokwanda. Ukusebenza komkhiqizo we-cellulose ether odakeni oluxutshwe okomile sekugxile kakhulu ekunakeni kwabakhiqizi nabasebenzisi.
Impahla ebaluleke kakhulu ye-cellulose ether ukugcinwa kwayo kwamanzi ezintweni zokwakha. Ngaphandle kokwengezwa kwe-cellulose ether, ungqimba oluncane lodaka olusha loma ngokushesha kangangokuthi usimende awukwazi ukumanzisa ngendlela evamile futhi udaka alukwazi ukuqina futhi lufinyelele ukuhlangana okuhle. Ngesikhathi esifanayo, ukungezwa kwe-cellulose ether kwenza udaka lube ne-plasticity enhle nokuguquguquka, futhi kuthuthukisa amandla okubopha odaka. Ake sikhulume ngomthelela ekusetshenzisweni kodaka oluxutshwe okomile kusukela ekusebenzeni komkhiqizo we-cellulose ether.
1. Ubuhle be-cellulose
Ukucoleka kwe-cellulose ether kuthinta ukunyibilika kwayo. Isibonelo, ukuncipha kokucoleka kwe-cellulose ether, lapho incibilika ngokushesha emanzini kanye nokuthuthukiswa kokusebenza kokugcinwa kwamanzi. Ngakho-ke, ukucoleka kwe-cellulose ether kufanele kufakwe njengenye yezakhiwo zayo zophenyo. Ngokuvamile, insalela yesisefo ye-cellulose ether fineness engaphezu kuka-0.212mm akufanele ibe ngaphezu kuka-8.0%.
2. Ukomisa izinga lokulahlekelwa isisindo
Izinga lokuncipha kwesisindo lokomisa libhekisela kuphesenti lesisindo sezinto ezilahlekile kusisindo sesampula yangempela lapho i-cellulose ether yomiswa ezingeni lokushisa elithile. Ngekhwalithi ethile ye-cellulose ether, izinga lokuncipha kwesisindo lokomisa liphezulu kakhulu, okuzonciphisa okuqukethwe kwezithako ezisebenzayo ku-cellulose ether, kuthinte umthelela wokusetshenziswa kwamabhizinisi angezansi, futhi kukhuphule izindleko zokuthenga. Imvamisa, ukuncipha kwesisindo ekomisweni kwe-cellulose ether akukho ngaphezu kuka-6.0%.
3. I-sulfate ash content ye-cellulose ether
Ngekhwalithi ethile ye-cellulose ether, okuqukethwe komlotha kuphezulu kakhulu, okuzonciphisa okuqukethwe kwezithako ezisebenzayo ku-cellulose ether futhi kuthinte umphumela wokusetshenziswa kwamabhizinisi aphansi. I-sulfate ash content ye-cellulose ether iyisilinganiso esibalulekile sokusebenza kwayo. Kuhlanganiswe nesimo samanje sokukhiqiza sabakhiqizi bezwe lami abakhona be-cellulose ether, ngokuvamile okuqukethwe komlotha we-MC, HPMC, HEMC akufanele kudlule u-2.5%, futhi okuqukethwe komlotha we-HEC cellulose ether akufanele kudlule u-10.0%.
4. I-viscosity ye-cellulose ether
Ukugcinwa kwamanzi kanye nomthelela wokujiya we-cellulose ether ikakhulukazi kuncike ku-viscosity kanye nomthamo we-cellulose ether ngokwayo eyengezwe ku-slurry kasimende.
5. Inani le-pH le-cellulose ether
I-viscosity yemikhiqizo ye-cellulose ether izokwehla kancane kancane ngemva kokugcinwa ekushiseni okuphezulu noma isikhathi eside, ikakhulukazi emikhiqizweni ye-viscosity ephezulu, ngakho-ke kuyadingeka ukunciphisa i-pH. Ngokuvamile, kuyatuseka ukulawula uhla lwe-pH lwe-cellulose ether ukuya ku-5-9.
6. Ukudlulisa ukukhanya kwe-cellulose ether
Ukudluliswa kokukhanya kwe-cellulose ether kuthinta ngokuqondile umphumela wayo wokusetshenziswa ezintweni zokwakha. Izici eziyinhloko ezithinta ukudluliswa kokukhanya kwe-cellulose ether yilezi: (1) ikhwalithi yezinto ezingavuthiwe; (2) umphumela we-alkalization; (3) isilinganiso senqubo; (4) isilinganiso se-solvent; (5) umphumela wokungathathi hlangothi. Ngokomphumela wokusetshenziswa, ukukhanya kwe-cellulose ether akufanele kube ngaphansi kwama-80%.
7. Izinga lokushisa lejeli le-cellulose ether
I-Cellulose ether isetshenziswa kakhulu njenge-viscosifier, i-plasticizer kanye ne-ejenti yokugcina amanzi emikhiqizweni kasimende, ngakho-ke i-viscosity kanye nezinga lokushisa lejeli yizinyathelo ezibalulekile zokubonisa ikhwalithi ye-cellulose ether. Izinga lokushisa lejeli lisetshenziselwa ukunquma uhlobo lwe-cellulose ether, ehlobene nezinga lokushintshanisa amanye ama-cellulose ether. Ngaphezu kwalokho, usawoti kanye nokungcola kungase kuthinte izinga lokushisa lejeli. Lapho izinga lokushisa lesisombululo likhuphuka, i-polymer cellulose kancane kancane ilahlekelwa amanzi, futhi i-viscosity yesisombululo iyancipha. Lapho iphuzu le-gel lifinyelelwa, i-polymer iphelelwe amanzi ngokuphelele futhi yakha ijeli. Ngakho-ke, emikhiqizweni kasimende, izinga lokushisa livame ukulawulwa ngaphansi kwezinga lokushisa lokuqala le-gel. Ngaphansi kwalesi simo, izinga lokushisa liyancipha, i-viscosity iyanda, futhi umphumela osobala kakhulu wokuqina nokugcinwa kwamanzi.
Isikhathi sokuthumela: Apr-12-2023