Ukuphakama kwe-viscoxyprotity methylcellulose, ngcono ukusebenza kokugcinwa kwamanzi. I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC. Njengamanje, abakhiqizi be-HPMC abahlukene basebenzisa izindlela ezahlukahlukene nezinsimbi ukukala ukubonakala kwe-HPMC. Izindlela eziphambili zinguHake Rotovisko, i-HIPPLER, UBBELOHDE kanye neBrookfield.
Ngomkhiqizo ofanayo, imiphumela ye-visacosity elikalwe ngezindlela ezahlukahlukene ihluke kakhulu, kanti abanye baphinda kabili umehluko. Ngakho-ke, lapho uqhathanisa i-viscosity, qiniseka ukuthi ukwenze phakathi kwezindlela ezifanayo zokuhlola, kufaka phakathi izinga lokushisa, i-rotor, njll.
Ngobukhulu bezinhlayiyana, abahle kakhulu, okungcono ukugcinwa kwamanzi. Ngemuva kwezinhlayiya ezinkulu ze-cellulose ether zithintana namanzi, ingaphezulu lincibilika ngokushesha ukwakha ijeli, elisonga lokho kungavimba ukufakwa okuqhubekayo kwama-molecule amanzi. . Kuthinta kakhulu umphumela wokugcinwa kwamanzi we-ether yalo ye-cellulose, futhi i-solubility ingenye yezinto zokukhetha i-cellulose ether. I-Fechness nayo iyinkomba yokusebenza ebalulekile ye-methyl celtulose ether. I-MC esetshenziselwe i-powder eyomile yodumbu iyadingeka ukuba ibe yimpuphu, okuqukethwe kwamanzi okuphansi, nobuciko futhi kudinga ama-20% afinyelela ku-60% usayizi wezinhlayiyana kube ngaphansi kwama-63um. Ubuhle buthinta i-solubity ye-hydroxypropylylylylylyllose ether. I-Coarse MC imvamisa i-granular, futhi kulula ukuyiyeka emanzini ngaphandle kwe-agglomeration, kepha izinga lokuchithwa lihamba kancane, ngakho-ke alilungele ukusetshenziswa ngodaka ngodaka owomile. Ku-powder eyomile, i-MC ihlakazeka phakathi kwezinto zokwenza kahle ezifana nama-agregates, ama-filler amahle kanye nosimende. I-powder enhle kuphela eyanele ingagwema i-agglomeration ye-methgel cellulose ether lapho ixuba namanzi. Lapho i-MC ingezwa ngamanzi ukuncibilikisa ama-agglomerates, kunzima ukusakazeka futhi uncibilike. I-MC ene-coarser deflerer ayigcini nje ngokuchitheka, kepha futhi inciphisa amandla endawo ngodaka. Lapho kwakhiwa u-powder olomile endaweni enkulu, ijubane lokuphulukisa kodaka olomile lwasendaweni luncishiswa kakhulu, futhi ukuqhekeka kwenzeka ngenxa yezikhathi ezihlukile zokwelapha. Okokufafaza ngodaka kusetshenziswa ukwakhiwa kwemishini, ngenxa yesikhathi esifushane esivuthayo, ubuciko buyadingeka ukuba buphakeme.
Ngokuvamile ukukhuluma, ukukhuphuka okuphezulu, kungcono ukugcinwa kwamanzi. Kodwa-ke, ukukhuphuka kwesisindo kanye nesisindo se-molecular se-MC, ukuncishiswa okuhambisanayo kwe-solubility yayo, okunomthelela omubi emandleni nasezakhiweni zokwakha zodaka. Lapho kuphakama i-viscosity, kusobala kakhulu umphumela wokuqina wodaka, kepha awunakulingana. Lapho esekhuphuka khona i-viscosity, kugcwele udaka lwamanzi. Ngesikhathi sokwakha, kuzokunamathela ku-scrace futhi kube nokunamathelisa okuphezulu ku-substrate. Kepha kuncane ukwandisa amandla wesakhiwo sodaka olumanzi uqobo. Ngesikhathi sokwakha, ukusebenza kokusebenza okulwa nokuhlanza akubonakali. Ngokuphambene nalokho, okunye ukubonwa okuphansi kodwa okulungiselelwe izithako ze-methyllulose kusebenza kahle kakhulu ekuthuthukiseni amandla wesakhiwo sodaka olumanzi.
Okukhulu inani le-cellulose ether elingezwe kudaka, okungcono ukusebenza kokugcinwa kwamanzi, kukhuphuka ukubonwa okuphezulu, ukusebenza okungcono kokusebenza kwamanzi.
Ubumsulwa be-HPMC bunalo nethonya elithile ekugcinweni kwalo kwamanzi. Ngokuvamile, ku-methyl cellulose izithatheketha ngokubonakala okufanayo kodwa kube nobunzima obuhlukile, endabeni yenani elifanayo lezengezo, ubuciko obuhle, umphumela wokugcina amanzi.
Ukugcinwa kwamanzi kwe-HPMC kuhlobene nokushisa okusetshenzisiwe, nokugcinwa kwamanzi kwe-methyl cellulose ether kuncipha ngokwanda kokushisa. Kodwa-ke, ezinsizakalweni ezingokoqobo ezibonakalayo, i-powder eyomile ivame ukusetshenziswa kuma-substrates ashisayo emazingeni okushisa aphezulu (aphezulu kunama-degree aphezulu, avame ukusheshisa ukwelashwa kuka usimende kanye nokwenza lukhuni ngodaka owomile. Ukwehla kokugcinwa kwamanzi kuholele ekubonakaleni okusobala ukuthi ukuqina komzimba nobabili kuthinteka, futhi kubaluleke kakhulu ukunciphisa umphumela wezinto zokushisa ngaphansi kwalezo zimo. Yize i-methyl hydroxyethyylelylyl pultuleylyl etherfitive okwamanje icatshangelwa ukuthi ingaphambili yentuthuko yezobuchwepheshe, ukuncika kwayo kumazinga okushisa kungaholela ekunciphiseni ukusebenza kombusi owomile. Yize inani le-methyl hydroxyethyls celtule Ngokusebenzisa ezinye izindlela zokwelapha ezikhethekile, njengokukhuphula izinga lokuthezeka, i-MC ingagcina imiphumela yayo yokugcina amanzi isebenza kangcono emazingeni okushisa aphezulu, ukuze ikwazi ukuhlinzeka ukusebenza okungcono ngaphansi kwezimo ezinzima.
Isikhathi sePosi: Feb-20-2025