Umphumela ongcono we-hydroxypropyl methyl cellulose ezintweni ezisekelwe kusimende

I-Hydroxypropyl methyl cellulose

Ukusetha ukuhlolwa kwesikhathi

Isikhathi sokusetha sikakhonkolo sihlobene ngokuyinhloko nesikhathi sokusetha sikasimende, umthelela we-aggregate awumkhulu, ngakho-ke isikhathi sokusetha sikasimende singasetshenziswa esikhundleni socwaningo lwe-HPMC ngesikhathi sokusetha ukhonkolo ongaphansi kwamanzi, ithonya lengxube ngenxa yesikhathi sokusetha ngesilinganiso samanzi nosimende wodaka, umphumela wesilinganiso sesanti sikasimende, ngakho-ke ukuze kuhlolwe isilinganiso se-motarcement kanye nethonya le-MC ye-motarcement kanye nethonya le-HP yokubeka isikhathi kodaka kumele kulungiswe.

I-HPMC iyisakhiwo somugqa we-macromolecule, eneqembu le-hydroxyl eqenjini elisebenzayo, elingakha izibopho ze-hydrogen nama-molecule wamanzi axutshwe futhi andise i-viscosity yamanzi axutshwayo. HPMC eside amaketanga amangqamuzana azoheha wodwa, ukuze HPMC amangqamuzana intertwine nomunye ukwakha isakhiwo inethiwekhi, usimende, ukuxuba amanzi esongwe. Ngenxa yokuthi i-HPMC yakha uhlaka lwenethiwekhi olufana nefilimu elizacile kanye nomthelela wokugoqa usimende, izovimbela ngempumelelo ukuhwamuka komswakama odakeni, ivimbele noma ibambezele izinga lokugeleza kukasimende.

Ukuhlolwa kokuchithwa kwamanzi

Isimo sokuphuma kwamanzi sodaka sifana nesikakhonkolo, okuzodala ukuhlangana okuqinile, okuholela ekwandeni kwesilinganiso sikasimende wamanzi wengqimba ephezulu ye-slurry, futhi wenze ungqimba oluphezulu lwe-slurry lube nokuncipha okukhulu kwepulasitiki noma ukuqhekeka ekuqaleni, futhi amandla ongqimba olungaphezulu lwe-slurry abuthakathaka. Kusukela ekuhlolweni, kungabonakala ukuthi uma inani lokuxuba lingaphezu kuka-0.5%, akukho mkhuba wokuvuza kwamanzi. Lokhu kungenxa yokuthi niniI-HPMCixubene nodaka, i-HPMC inokwakheka kwefilimu kanye nesakhiwo senethiwekhi, kanye ne-adsorption ye-hydroxyl ochungechungeni olude lwama-macromolecules, ukuze usimende odakeni nokuxubana kwamanzi kwakha i-flocculation, ukuqinisekisa ukwakheka okuzinzile komzimba wodaka. Ngemva kokwengeza i-HPMC odakeni futhi, amabhamuza amaningi amancane azimele azokwakhiwa. Lawa mabhamuza azosatshalaliswa ngokulinganayo odakeni futhi avimbele ukubekwa kwe-aggregate. I-HPMC ukusebenza kobuchwepheshe kwezinto ezisekelwe kusimende kunomthelela omkhulu, okuvame ukusetshenziselwa ukulungiselela njengodaka olomile, udaka lwe-polymer nezinye izinto eziyinhlanganisela ezisekelwe kusimende, ukuze zibe nokugcinwa kwamanzi okuhle, ipulasitiki.