Hydroxypropyl methylcellulose e tsoa hokae?

Hydroxypropyl methylcellulose (HPMC) ke polymer ea maiketsetso e nkiloeng ho selulose, e leng polima ea tlhaho ea tlhaho e etsang mabota a lisele tsa limela. HPMC e entsoe ka ho fetola selulose ka lik'hemik'hale ka mokhoa o bitsoang etherification.

Ka etherification, cellulose e phekoloa ka motsoako oa propylene oxide le methyl chloride tlas'a maemo a laoloang ho hlahisa hydroxypropyl cellulose (HPC). HPC e ntan'o fetoloa hape ka ho e phekola ka methanol le hydrochloric acid ho hlahisa HPMC.

Sehlahisoa se hlahisoang ke HPMC ke polima e qhibilihang ka metsing, e seng ea ionic e nang le lintho tse ngata tse molemo, tse kang ho boloka metsi a mangata, bokhoni bo botle ba ho etsa filimi, le thepa e babatsehang ea ho teteka le ho tsitsisa. Thepa ena e etsa hore HPMC e be tlatsetso e sebetsang lits'ebetsong tse fapaneng tse fapaneng, joalo ka thepa ea kaho, meriana le lihlahisoa tsa lijo.

Le hoja HPMC e tsoa ho selulose, ke polymer ea maiketsetso e hlahisoang ka mokhoa o rarahaneng oa lik'hemik'hale.