Umphumela wokuthuthukisa we-hydroxypropyl methyl cellulose ezintweni ezisekelwe kusimende

I-Hydroxypropyl methyl cellulose

Ukusetha isikhathi sokuhlolwa

Isikhathi sokusetha ukhonkolo sihlobene kakhulu nesikhathi sokusetha usimende, umthelela ohlanganisiwe awukhulu, ngakho-ke isikhathi sokusetha ukhonkolo singasetshenziswa esikhundleni sokutadisha i-HPMC yesikhathi sokusetha ukhonkolo ongahlakazeki ngaphansi kwamanzi, ithonya lengxube ngenxa yesikhathi sokusetha ngesilinganiso samanzi-ukhonkolo wokhonkolo, umphumela wesilinganiso sesihlabathi sikakhonkolo, ngakho-ke ukuze kuhlolwe ithonya le-HPMC esikhathini sokusetha ukhonkolo, isilinganiso samanzi-ukhonkolo kanye nesilinganiso sesihlabathi sikakhonkolo kudingeka silungiswe.

I-HPMC iyisakhiwo esiqondile sama-macromolecule, esineqembu le-hydroxyl eqenjini elisebenzayo, elingakha izibopho ze-hydrogen nama-molecule amanzi axubayo futhi landise i-viscosity yamanzi axubayo. Amaketanga amade e-HPMC azodonselana, ukuze ama-molecule e-HPMC ahlangane ukuze akhe isakhiwo senethiwekhi, i-samente, amanzi axubayo asongwe. Ngenxa yokuthi i-HPMC yakha isakhiwo senethiwekhi esifana nefilimu encane kanye nomphumela wokugoqa we-samente, izovimbela ngempumelelo ukuhwamuka komswakama ku-mortar, ivimbele noma yehlise izinga lokumanzisa kwe-samente.

Ukuhlolwa kokuchitheka kwamanzi

Isenzakalo sokuphuma kwegazi emanzini kodaka sifana nesekhonkrithi, esizobangela ukuhlaliswa okukhulu kweqoqo, siholele ekwandeni kwesilinganiso samanzi nosimende somendlalelo ophezulu wodaka, futhi senze ungqimba oluphezulu lodaka lube nokuncipha okukhulu kwepulasitiki noma ukuqhekeka ngisho nasesigabeni sokuqala, futhi amandla engqimba engaphezulu yodaka abuthakathaka. Kusukela ekuhlolweni, kungabonakala ukuthi lapho inani lokuxuba lingaphezu kuka-0.5%, akukho senzakalo sokuvuza kwamanzi. Lokhu kungenxa yokuthi laphoI-HPMCUma ixutshwe ibe yi-mortar, i-HPMC inokwakheka kwefilimu kanye nesakhiwo senethiwekhi, kanye nokumuncwa kwe-hydroxyl ochungechungeni olude lwama-macromolecule, ukuze usimende odakeni kanye namanzi axubile akhe ukugoqeka, ukuqinisekisa isakhiwo esizinzile somzimba we-mortar. Ngemva kokwengeza i-HPMC ku-mortar futhi, kuzokwakhiwa amabhamuza amancane amaningi azimele. Lawa mabhamuza azosatshalaliswa ngokulinganayo ku-mortar futhi avimbele ukufakwa kwe-aggregate. I-HPMC ukusebenza kobuchwepheshe kwezinto ezisekelwe kusimende kunomthelela omkhulu, okuvame ukusetshenziselwa ukulungiselela njengodaka owomile, udaka lwe-polymer kanye nezinye izinto ezintsha ezihlanganisiwe ezisekelwe kusimende, ukuze ibe nokugcinwa kwamanzi okuhle, i-plasticity.