Ungakuthuthukisa kanjani ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose

I-Hydroxypropyl methylcellulose iyisengezo esisetshenziswa kakhulu kudaka olomile lwempuphu. I-Cellulose ether idlala indima ebalulekile ku-powder mortar omile. Ngemva kokuchithwa kwe-cellulose ether odakeni, umsebenzi ongaphezulu uqinisekisa ukuthi izinto zikasimende ziyiSistimu isatshalaliswa ngokulinganayo, futhi i-cellulose ether, njenge-colloid evikelayo, "igoqa" izinhlayiya eziqinile futhi yakha ungqimba lwefilimu yokugcoba ngaphandle kwayo. ebusweni, okwenza uhlelo lodaka luzinze futhi luthuthukise ukugeleza kodaka ngesikhathi sokuxuba izakhiwo kanye nokushelela kokwakhiwa.

IHydroxypropyl methylcellulose HPMC inokugcinwa kwamanzi okuhle kakhulu, okungavimbela umswakama odongeni olumanzi ukuba uhwamuke ngaphambi kwesikhathi noma ukumuncwa ungqimba oluyisisekelo, kuqinisekiswe ukuthi usimende ugcwele amanzi ngokugcwele, ngaleyo ndlela ekugcineni kuqinisekiswe izakhiwo zemishini zodaka, okuzuzisa kakhulu. kuya ezingqimbeni ezincane Udaka kanye nesisekelo esimuncayo noma udaka olusetshenziswa ngaphansi kwezinga lokushisa eliphezulu nezimo ezomile. Umphumela wokugcina amanzi we-hydroxypropyl methylcellulose ether ungashintsha inqubo yokwakha evamile futhi uthuthukise inqubekelaphambili yokwakha. Isibonelo, ukwakhiwa kwe-plastering kungenziwa kuma-substrates amunca amanzi ngaphandle kokumanzisa ngaphambili.

I-viscosity, umthamo, izinga lokushisa elizungezile kanye nesakhiwo samangqamuzana e-hydroxypropyl methylcellulose HPMC kunomthelela omkhulu ekusebenzeni kwayo kokugcina amanzi. Ngaphansi kwezimo ezifanayo, lapho i-viscosity ye-cellulose ether ikhulu, kuba ngcono ukugcinwa kwamanzi; lapho umthamo uphezulu, kuba ngcono ukugcinwa kwamanzi. Ngokuvamile, inani elincane le-cellulose ether lingathuthukisa kakhulu ukugcinwa kwamanzi kodaka. Lapho umthamo ufinyelela okuthile Uma idigri iphezulu, izinga lokugcinwa kwamanzi likhula kancane; lapho izinga lokushisa lendawo likhuphuka, ukugcinwa kwamanzi kwe-cellulose ether ngokuvamile kuyehla, kodwa amanye ama-cellulose ether ashintshiwe nawo anokugcinwa kwamanzi okungcono ngaphansi kwezimo zokushisa eziphezulu; i-cellulose enezinga eliphansi lokushintsha i-Ether igcina amanzi kangcono.

Iqembu le-hydroxyl ku-molecule ye-HPMC kanye ne-athomu ye-oksijini ku-ether bond izohlotshaniswa ne-molecule yamanzi ukuze yakhe isibopho se-hydrogen, iguqule amanzi amahhala abe amanzi aboshwe, ngaleyo ndlela idlale indima enhle ekugcineni amanzi; ama-molecule amanzi kanye ne-cellulose Ukuxubana phakathi kwamaketanga e-ether molecule kwenza ama-molecule amanzi angene ngaphakathi kwamaketanga amakhulu e-cellulose ether futhi angaphansi kwamandla aqinile okubopha, ngaleyo ndlela enze amanzi amahhala kanye namanzi abanjwe, okuthuthukisa ukugcinwa kwamanzi odaka; I-cellulose ether ithuthukisa ukugcinwa kwamanzi okuxubile okusha Izakhiwo ze-rheological, isakhiwo senethiwekhi enezimbotshana kanye nengcindezi ye-osmotic yokunamathisela usimende noma izakhiwo zefilimu ze-cellulose ether zivimbela ukusabalala kwamanzi. Kodwa-ke, ngenxa yokungagculisi kokugcinwa kwamanzi kwe-ether ye-cellulose yamanje, udaka lunokuhlangana okubi nokusebenza kabi kokwakhiwa, futhi udaka lujwayele ukuqhekeka, ukugoba nokuwa ngemva kokwakhiwa.