Uma i-viscosity inkuluI-HPMCUma i-hydroxypropyl methyl cellulose ingcono, ukusebenza kokugcinwa kwamanzi kuba ngcono. Ukuqina kuyipharamitha ebalulekile yokusebenza kwe-HPMC. Njengamanje, abakhiqizi abahlukene be-HPMC basebenzisa izindlela namathuluzi ahlukene ukunquma ukuqina kwe-HPMC. Izindlela eziyinhloko yiHaake I-Rotovisko, i-Hoppler, i-Ubbelohde kanye ne-Brookfield, njll.
Kumkhiqizo ofanayo, imiphumela ye-viscosity elinganiswa ngezindlela ezahlukene ihluke kakhulu, eminye ihluke kakhulu. Ngakho-ke, uma kuqhathaniswa i-viscosity, kumele kwenziwe phakathi kwendlela efanayo yokuhlola, kufaka phakathi izinga lokushisa, i-rotor, njll.
Ngosayizi wezinhlayiya, uma izinhlayiya zincane, kuba ngcono ukugcinwa kwamanzi. Izinhlayiya ezinkulu ze-cellulose ether zithintana namanzi, ubuso buncibilika ngokushesha bese benza ijeli yokugoqa izinto ukuze kuvinjelwe ama-molecule amanzi ukuthi angaqhubeki nokungena, ngezinye izikhathi ukuxubha isikhathi eside akukwazi ukuhlakazeka ngokulinganayo, ukwakheka kwesisombululo esinodaka noma i-agglomerate. Ukuncibilika kwe-cellulose ether kungenye yezinto ezibalulekile zokukhetha i-cellulose ether. Ukuncibilika nakho kuyinkomba yokusebenza ebalulekile ye-methyl cellulose ether. I-MC yodaka olomile idinga impuphu, okuqukethwe kwamanzi aphansi, kanye nokuncibilika okungu-20% ~ 60% usayizi wezinhlayiya ngaphansi kuka-63um. Ukuncibilika kuthinta ukuncibilika kweI-HPMCi-hydroxypropyl methyl cellulose ether. I-MC ecolekile ivame ukuba yi-granular futhi ingancibilika kalula emanzini ngaphandle kokuhlangana, kodwa ijubane lokuncibilika lihamba kancane kakhulu, ngakho-ke ayifanele ukusetshenziswa ku-mortar eyomile. Ku-mortar eyomile, i-MC ihlakazeka phakathi kwe-aggregate, ama-filler amancane nezinto zokuqinisa ukhonkolo ezifana ne-cement, futhi yi-powder kuphela elungile ngokwanele engagwema ukuhlangana kwe-methyl cellulose ether uma ixutshwa namanzi. Uma i-MC ingeza amanzi ukuze kuncibilikiswe i-agglomerate, kunzima kakhulu ukuyihlakaza nokuyincibilikisa. I-MC enobunono obucolekile ayigcini nje ngokuchitha, kodwa futhi inciphisa amandla endawo ka-mortar. Uma i-mortar eyomile enjalo yakhiwe endaweni enkulu, ijubane lokupholisa lika-mortar eyomile yendawo liyancipha kakhulu, okuholela ekuqhekekeni okubangelwa isikhathi sokupholisa esihlukile. Ku-mortar yokufutha ngomshini, ngenxa yesikhathi esifushane sokuxuba, ubunono buphakeme.
Ngokuvamile, uma i-viscosity iphakeme, umphumela wokugcina amanzi uba ngcono. Kodwa-ke, uma i-viscosity iphakeme, isisindo sama-molecule se-MC siphakeme, futhi ukusebenza kokuncibilika kuzoncipha ngokufanayo, okunomthelela omubi emandleni nasekusebenzeni kokwakhiwa kwe-mortar. Uma i-viscosity iphakeme, umphumela wokujiya we-mortar ubonakala kakhulu, kodwa awulingani nobudlelwano. Uma i-viscosity iphakeme, i-mortar emanzi izonamathela kakhulu, kokubili ukwakhiwa, ukusebenza kwe-scraper enamathelayo kanye nokunamathela okuphezulu ezintweni eziyisisekelo. Kodwa akusizi ukwandisa amandla esakhiwo se-mortar emanzi. Ngesikhathi sokwakhiwa, ukusebenza okulwa nokuwa akubonakali. Ngokuphambene nalokho, amanye ama-ether e-methyl cellulose ahlanganisiwe aphansi kodwa asebenza kahle kakhulu ekuthuthukiseni amandla esakhiwo se-mortar emanzi.
Uma i-cellulose ether ingezwa kakhulu ku-mortar, ukusebenza kokugcinwa kwamanzi kungcono, i-viscosity iyanda, ukusebenza kokugcinwa kwamanzi kungcono.
Ubucwebe be-HPMC bunomthelela othile ekugcinweni kwamanzi, ngokuvamile, ngenxa ye-viscosity efanayo kanye nobucwebe obuhlukile be-methyl cellulose ether, uma kunesilinganiso esifanayo sokwengeza, umphumela wokugcina amanzi ungcono kakhulu.
Ukugcinwa kwamanzi kwe-HPMC kuhlobene nokushisa kokusetshenziswa, kanti ukugcinwa kwamanzi kwe-methyl cellulose ether kwehla ngokukhuphuka kwezinga lokushisa. Kodwa ekusetshenzisweni kwezinto zangempela, izindawo eziningi ze-mortar eyomile zivame ukuba sezindaweni zokushisa eziphakeme (ezingaphezu kwama-degrees angu-40) ngaphansi kwesimo sokwakhiwa endaweni eshisayo, njengokushiswa kwe-plaster yangaphandle yodonga ehlobo, okuvame ukusheshisa ukuqina kwe-samente kanye nokuqina kwe-mortar eyomile. Ukwehla kwezinga lokugcina amanzi kuholela emzwelweni osobala wokuthi kokubili ukumelana nokwakhiwa kanye nokuqhekeka kuyathinteka. Kulesi simo, ukunciphisa ithonya lezici zokushisa kuba yinto ebaluleke kakhulu. Nakuba isengezo se-methyl hydroxyethyl cellulose ether sibhekwa njengesihamba phambili ekuthuthukisweni kobuchwepheshe, ukuncika kwaso ekushiseni kusazoholela ebuthakathakeni bezakhiwo ze-mortar eyomile. Ngisho nokwanda komthamo we-methyl hydroxyethyl cellulose (ifomula yasehlobo), ukumelana kokwakhiwa kanye nokuqhekeka akukwazi ukuhlangabezana nezidingo zokusetshenziswa. Ngokwelashwa okukhethekile kwe-MC, njengokwandisa izinga lokushintshashintsha kwe-ether, umphumela wokugcina amanzi we-MC ungagcina umphumela ongcono ngaphansi kwezinga lokushisa eliphezulu, ukuze ukwazi ukunikeza ukusebenza okungcono ngaphansi kwezimo ezinzima.
Isikhathi sokuthunyelwe: Meyi-18-2022