I-Hydroxypropyl methylcellulose (HPMC) iyinto ebalulekile enezinhlobo eziningi zezicelo embonini yezemithi kanye nakwezinye izimboni ezifana nokudla, izimonyo kanye nokwakha. Isidingo se-HPMC besilokhu sikhula kancane kancane eminyakeni edlule ngenxa yezakhiwo zayo ezihlukile njengokuqina, ukubopha, ukwakha ifilimu kanye nokugcinwa kwamanzi. Kulesi sihloko, sizoxoxa ngendlela yokukhiqiza i-alkaline leaching ye-hydroxypropyl methylcellulose (HPMC).
Indlela yokukhiqiza i-alkali leaching ye-hydroxypropyl methylcellulose (HPMC) inqubo lapho i-cellulose isabela khona ne-propylene oxide kanye ne-methyl chloride lapho kukhona i-alkali. Le nqubo yenzeka ngaphansi kwezimo zokushisa, ingcindezi kanye nesikhathi esilawulwayo ukuze kukhiqizwe imikhiqizo ye-HPMC esezingeni eliphezulu.
Isinyathelo sokuqala ekukhiqizeni i-HPMC kusetshenziswa indlela yokukhiqiza i-alkaline leaching ukulungiselela izinto zokusetshenziswa kwe-cellulose. I-Cellulose ihlanzwa kuqala ngokususa noma yikuphi ukungcola bese iguqulwa ibe yi-alkali cellulose ngokwelashwa nge-alkali efana ne-sodium hydroxide. Lesi sinyathelo sibalulekile ngoba sandisa ukusabela kwe-cellulose ngama-reagent asetshenziswa ezinyathelweni ezilandelayo.
I-alkali cellulose iphathwa ngengxube ye-propylene oxide kanye ne-methyl chloride ngaphansi kokushisa okulawulwayo kanye nengcindezi. Ukusabela phakathi kwe-alkali cellulose kanye ne-reagent kuphumela ekwakhekeni komkhiqizo, okuyingxube ye-hydroxypropyl methylcellulose kanye neminye imikhiqizo engaphansi kwayo.
Ingxube iyagezwa, ihlanzwe futhi ihlungwe ukuze kususwe ukungcola okufana nama-reagent angaphendulwanga kanye nemikhiqizo ephumayo. Isixazululo esiphumayo sibe sesigxiliswa ngokuhwamuka ukuze kutholakale umkhiqizo we-HPMC ohlanzekile kakhulu.
Indlela yokukhiqiza i-alkali leaching ye-hydroxypropyl methylcellulose (HPMC) inezinzuzo eziningi uma iqhathaniswa nezinye izindlela zokukhiqiza ezifana ne-etherification. Enye yezinzuzo ukuthi iyinqubo enobungani nemvelo. Ngokungafani nezinye izinqubo, indlela yokukhiqiza i-alkali leaching ayisebenzisi izinyibilikisi ze-halogen eziyingozi emvelweni nasempilweni yabantu.
Enye inzuzo yale ndlela ukukhiqizwa kwemikhiqizo ye-HPMC ehlanzekile kakhulu. Izimo zokusabela ezilawulwayo ziqinisekisa ukuthi umkhiqizo wokugcina usezingeni elifanayo futhi ufanelekela izinhlelo zokusebenza ezahlukahlukene.
Ukusetshenziswa kwe-HPMC embonini yezemithi kubalulekile ekukhiqizweni kwamaphilisi, ama-capsule kanye nezinye izinhlobo zomthamo. I-HPMC ingasetshenziswa njenge-binder, disintegrant, i-ejenti yokumboza, njll. Ukusetshenziswa kwe-HPMC kulezi zinhlelo kuqinisekisa ukuthi ifomu lomthamo lisezingeni eliphezulu futhi lihlangabezana nezindinganiso ezidingekayo.
I-HPMC isetshenziswa futhi njengesithambisi, i-emulsifier kanye nesiqinisi embonini yokudla. Ukusetshenziswa kwe-HPMC emikhiqizweni yokudla kuqinisekisa ukuthungwa okulinganayo, ukujiya kanye nekhwalithi.
Embonini yokwakha, i-HPMC isetshenziswa njengesithasiselo sikasimende ukuthuthukisa ukusebenza kahle, ukugcinwa kwamanzi kanye nezakhiwo zokubopha zesikamende. Ukusetshenziswa kwe-HPMC kuqinisekisa ukuthi imikhiqizo yokwakha isezingeni eliphezulu futhi ihlangabezana nezindinganiso ezidingekayo.
Ngamafuphi, indlela yokukhiqiza i-alkali leaching ye-hydroxypropyl methylcellulose (HPMC) iyinqubo yokukhiqiza imikhiqizo ye-HPMC esezingeni eliphezulu futhi isetshenziswa kabanzi ezimbonini ezahlukahlukene njengezemithi, ukudla, kanye nokwakha. Ukusetshenziswa kwe-HPMC kulezi zinhlelo kuqinisekisa ukuthi umkhiqizo usezingeni eliphezulu futhi uhlangabezana nezindinganiso ezidingekayo. Le ndlela yokukhiqiza nayo inobungani nemvelo futhi ikhiqiza umkhiqizo we-HPMC ohlanzekile kakhulu.
Isikhathi sokuthunyelwe: Septhemba 15-2023