I-Hydroxypropylm Methyllellulose i-polymer edumile enamanzi eyakha isixazululo esicacile nesizinzile emanzini futhi isetshenziswa kabanzi kwizimboni zezemithi, zokudla kanye nokwakha. Kuyinto esetshenziswayo esuselwa ku-mollulose esuselwa ku-mollulose ethuthukisa izibopho nokuhlangana kwemikhiqizo yokugcina yomkhiqizo wokugcina. Ukuze uqinisekise ukusebenza kwekhwalithi ephezulu ye-hydroxypropyllylylylykyl, umkhiqizo udinga ukuhlolwa futhi ufaneleke ngaphambi kokusebenzisa. Kulesi sihloko, sizoxoxa ngezindlela ezintathu ezinokwethenjelwa zokutshela ikhwalithi ye-hydroxypropyllylylylylylyl methylcellulose.
1. Ukuhlolwa kwe-Viscosity
I-viscoxyprosillllllykyly methylcellulose iyipharamitha ebalulekile yokuthola ikhwalithi yayo. I-Viscosity Ukumelana koketshezi ukugeleza futhi kulinganiswa ku-centipoise (CPS) noma i-MPA.S. I-viscoxyprosity methylcellose iyahlukahluka ngokuya ngesisindo sayo samangqamuzana kanye nesilinganiso sokufakwa esikhundleni. Lapho kukhuphuka izinga lokufakwa esikhundleni, okuphansi kwensizwa yomkhiqizo.
Ukuhlola ukubonwa kwe-hydroxypropyllylyllose, chitha inani elincane lomkhiqizo emanzini bese usebenzisa i-viscometer ukukala ukubonakala kwesixazululo. I-viscosity yesixazululo kufanele ibe phakathi kokuhlanganiswa okunconyiwe okunikezwe umphakeli womkhiqizo. Umkhiqizo omuhle we-hydroxyproppropyll methylcellulose kufanele ube nokubonakala okungaguquki, okuyisibonakaliso sobumsulwa kanye nobukhulu bezinhlayiyana.
2. Ukuhlolwa kokufakwa esikhundleni
Izinga lokufaka esikhundleni lisho isilinganiso senani lamaqembu ama-hydroxyl e-cellulose elifakwe esikhundleni se-hydroxypropylyl noma amaqembu we-methyl. Izinga lokufaka esikhundleni yinkomba yokuhlanzeka komkhiqizo, kukhuphuka izinga lokufaka esikhundleni, umsulwa umkhiqizo. Imikhiqizo esezingeni eliphakeme ye-Hydroxypropyllylylk kufanele ibe nezinga eliphakeme lokufaka esikhundleni.
Ukuhlola izinga lokufaka esikhundleni, kuthathwa kuthathwa nge-sodium hydroxide ne-hydrochloric acid. Nquma inani le-sodium hydroxide elidingekayo ukuze uhlukanise i-hydroxcelluloserproselrprose methylcellulose futhi ubale izinga lokufaka esikhundleni usebenzisa ifomula elandelayo:
Degree of substitution = (volume yeNaoh] X [noolity of Naoh] x 162) / (Isisindo seHydroxypropylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylulose] x 3)
Izinga lokufakwa esikhundleni kufanele libe ngaphakathi kokubalwa okunconyiwe okunikezwe umphakeli womkhiqizo. Izinga lokufakwa esikhundleni sekhwalithi ephezulu ye-hydroxypropylllylyly methylcellulose kufanele libe ngaphakathi kobubanzi obunconyiwe.
3. Ukuhlolwa kwe-solubity
I-solubity ye-hydroxypropyllylylylyly iyona enye ingxenye esemqoka enquma ikhwalithi yayo. Umkhiqizo kufanele uncibilike kalula emanzini hhayi amafomu noma ama-gels. Imikhiqizo esezingeni eliphakeme ye-Hydroxypropyllylylk kufanele inyekeze ngokushesha nangokulinganayo.
Ukwenza isivivinyo se-solubity, chaza inani elincane lomkhiqizo emanzini bese uvusa isixazululo kuze kube yilapho uchithwa ngokuphelele. Isixazululo kufanele sicace futhi sikhululekile kwizigaxa noma ngama-gels. Uma umkhiqizo ungancibilikisa kalula noma amafomu ama-limps noma ama-gels, kungaba uphawu lwekhwalithi engeyinhle.
Ekuphetheni, i-Hydroxypropyl Methylcellulose iyinto ebalulekile eluhlaza esetshenziswa ezimbonini ezahlukahlukene. Ukuze uqinisekise ikhwalithi ephezulu yomkhiqizo, i-viscosity, ukufakwa esikhundleni kanye nokuhlolwa kwe-solubity kwenziwa. Lezi zivivinyo zizosiza ukuqonda kahle izici zomkhiqizo nokusiza ukuhlukanisa ikhwalithi yayo. I-Hydroxyproppropyll esezingeni eliphakeme kakhulu i-viscosity engaguquki, izinga eliphakeme lokufaka esikhundleni, futhi lincibilika ngokushesha nangokufana emanzini.
Isikhathi sePosi: Jul-11-2023