Methyl cellulose ethers

Li-ether tsa methyl cellulose ke sehlopha sa li-derivative tsa cellulose tse fetoloang ka lik'hemik'hale ka ho kenya lihlopha tsa methyl mokokotlong oa cellulose. Li-derivative tsena li tsebahala ka ho qhibiliha ha tsona ka metsi 'me li na le lits'ebetso tse fapaneng liindastering tse kang lijo, meriana, kaho le litlolo. Mona ke mefuta e meng e tloaelehileng ea li-ether tsa methyl cellulose:

1.Selelulose ea Methyl (MC):

·Methyl cellulose ke e 'ngoe ea mefuta ea motheo ea li-ether tsa methyl cellulose. E nkiloe ho cellulose ka ho hlahisoa ha lihlopha tsa methyl. MC e qhibiliha ka metsing 'me hangata e sebelisoa e le setefatsi, se tsitsitseng le se kopanyang lisebelisoa tse fapaneng, ho kenyeletsoa lijo, meriana le litlolo. Lisebelisoa tsa kaho, e sebelisoa lihlahisoa tse thehiloeng samenteng ho ntlafatsa bokhoni ba ho sebetsa le ho khomarela.

2.Hydroxypropyl Methyl Cellulose (HPMC):

·Hydroxypropyl methyl cellulose ke setlolo sa methyl cellulose se kenyeletsang le lihlopha tsa hydroxypropyl. Phetoho ena e fana ka thepa e eketsehileng e kang ho boloka metsi hantle, ho thehoa ha filimi hamolemo, le ho khomarela ho eketsehileng. HPMC e sebelisoa haholo indastering ea kaho e le setei sa li-mortar, likhomaretsi le li-coat. Indastering ea lijo, e sebelisoa bakeng sa thepa ea eona ea ho tenya le ho tsitsisa.

3.Hydroxyethyl Methyl Cellulose (HEMC):

·Hydroxyethyl methyl cellulose ke motsoako oa methyl cellulose le lihlopha tsa hydroxyethyl. Sehlahisoa sena se hlahisa ho boloka metsi ho ntlafetseng, bokhoni ba ho etsa filimi, le thepa ea ho khomarela. HEMC e atisa ho sebelisoa thepa e thehiloeng samenteng, likhomaretsi tsa thaele, le metsoako e kopaneng indastering ea kaho. E boetse e sebelisoa indastering ea lijo e le setefatsi le se tsitsitseng.

4.Hydroxypropyl Methyl Cellulose Phthalate (HPMCP):

·Hydroxypropyl methyl cellulose phthalate ke sehlahisoa se ikhethang se sebelisoang meriana. Hangata e sebelisoa e le lesela la enteric bakeng sa meriana e nooang, e e lumellang ho feta ka mpeng e sa qhibilihisoa le ho lokolla metsoako e sebetsang ka maleng.

5.Methyl Cellulose Acetate Succinate (MCAS):

·Methyl cellulose acetate succinate ke setlolo se seng sa cellulose se sebelisoang meriana. Hangata se sebelisoa e le thepa ea ho koahela matlapa, e fanang ka thepa e laoloang ea ho lokolla.

Li-ether tsena tsa methyl cellulose li khethoa ho latela thepa ea tsona e ikhethang le litlhoko tsa lits'ebetso tse reriloeng. Ho hlahisoa ha lihlopha tse fapaneng tsa lik'hemik'hale sebopehong sa cellulose ho lumella mefuta e fapaneng ea ts'ebetso, e leng se etsang hore li-ether tsa methyl cellulose li be bohlokoa makaleng a fapaneng a indasteri.