Iphunga le-hydroxypropylllllllyllose methylcellulose lithinta kanjani ikhwalithi?

Imiphi imiphumela yosayizi wephunga ku-hydroxypropyllylylylk:

I-Synthesis ye-hydroxypropyll methylcellulose: Phatha ukotini ocwengekile no-35- 40 ° C. Beka i-alkali fiber ku-kettle yokuthethelwa, engeza i-propelene oxide kanye ne-methyl chloride ngokulandelana, futhi uthele ku-50-80 ° C amahora angama-5, ingcindezi ephezulu imayelana ne-1.8MPA. Ngemuva kwalokho engeza inani elifanele le-hydrochloric acid ne-acid oxalic emanzini ashisayo ku-90 ° C ukugeza okuqukethwe ukwandisa ivolumu. Dohydrate e-centrifuge. Geza ngamanzi kuze kungathathi hlangothi. Lapho okuqukethwe umswakama kwezinto ezibonakalayo kuphansi kune-60%, komisa ngokusakazwa komoya okushisayo ngo-130 ° C kuze kube yilapho okuqukethwe umswakama kungaphansi kuka-5%.

I-HPMC ekhiqizwa yi-solvent indlela isebenzisa i-toluene ne-isopropanol njenge-solvents. Uma ukugeza kungalungile, iphunga elithile liyaqhubeka. Njengamanje, ikhwalithi ye-hydroxyproppropylyl vpmc ihluka kakhulu, futhi intengo ihluka kakhulu, okwenza kube nzima kumakhasimende ukwenza ukukhetha okulungile. Le yinkinga yenqubo yokuwasha, ayithinti ukusetshenziswa futhi akunankinga, i-HPMC ehlanzekile akufanele ingahoxi i-ammonia, isitashi notshwala; I-HPMC ye-Aleelped ivame ukunuka zonke izinhlobo zokuhogela, noma ngabe ayinambitha, kuzozizwa zisinda. Kodwa-ke, i-hydroxypropyll methylcellose ekhiqizwa ngabakhiqizi abaningi inephunga elinamandla ikakhulukazi nephunga le-pungent. Ikhwalithi ayikabi ku-par.

I-Hypromellose itholakala ngokotini ocwengekile onama-arare uketshezi ukuthola i-alkaline cellulose, bese engeza i-solvent, i-ejenti, ukugeza, ukomisa, ukuchoboza, njll. Ukuthola imikhiqizo eqediwe. Yebo, kuzoba nephunga, ngakho-ke abasebenzisi bangayisebenzisa ngokuzethemba.