Hydroxypropyl methyl cellulose
Ukusetha Ukuhlolwa Kwesikhathi
Isikhathi sokusetha sikakhonkolo sihlobene kakhulu nesikhathi sokusetha sikasimende, umthelela ohlanganisiwe awusikhulu, ngakho-ke isikhathi sodaka singasetshenziswa endaweni ye-HPMC ngesilinganiso sekhonkolo kasimende, ithonya lesilinganiso se-mendec se-worder, ithonya lamanzi nesilinganiso sesimende kanye nesimende nesimende kodaka kudingeka lulungiswe.
I-HPMC yisakhiwo se-macromolecule linear, nge-hydroxyl geroar eqenjini elisebenzayo, elingakha ama-hydrogen bond ngama-molecule wamanzi okuxuba futhi andise ukubonwa kwamanzi okuxubana. Amaketanga ama-HPMC amade ama-molecular azodonsela omunye nomunye, ukuze ama-molecule we-HPMC ahlanganane nomunye ukwakha isakhiwo senethiwekhi, usimende, ukuxuba amanzi asongelwe. Ngoba i-HPMC yakha isakhiwo senethiwekhi esifana nefilimu elincanyana kanye nomphumela wokugoqa ka usimende, kuzovimba ngempumelelo ukuhwamuka komswakama ngodaka ngodaka, ukuvimbela noma ukwehlisa izinga le-hydration kasimende.
Isivivinyo Sokuhlanza Amanzi
Into esopha amanzi kadaka ifana neyakhonkolo, ezobangela ukuhlalwa okubucayi okukhulu, okuholela ekukhulisweni kwesilinganiso samanzi se-slurry esisezingeni eliphezulu se-slurry ye-slurry, futhi aqhekeke esigabeni esihle, futhi amandla engqimba ye-slurry abuthakathaka kakhulu. Ukusuka ekuhlolweni, kungabonakala ukuthi lapho inani lokuxuba lingaphezulu kwe-0.5%, akukho phutho lokuvuza kwamanzi. Lokhu kungenxa yokuthi lapho i-HPMC ixutshwe nodaka, i-HPMC inokwakheka kwefilimu nesakhiwo senethiwekhi, kanye ne-addrolption ye-hydroxyl ku-cuntrox edonswayo kanye nokuxubana nosimende odonswayo wefomu lomzimba. Ngemuva kokungeza i-HPMC kuDunga futhi, kuzokwakheka ama-bubble amaningi amancane ama-Tiny. Lawa ma-bubble azosatshalaliswa ngokulinganayo ku-dutar futhi avimbele ukubekwa kokuhlanganiswa. I-HPMC Ukusebenza kwezobuchwepheshe kwezinto zokwenziwa kosesimende zinomthelela omkhulu, okuvame ukusetshenziselwa ukulungiselela okufana nodaka olomile, okokugcina ama-polymer kanye nokugcinwa kwamanzi okusha, ukuze kube nokugcinwa kwamanzi okuhle, ipulasitiki.
Isikhathi sePosi: Sep-08-2022