Hydroxypropylmethylcellulose (HPMC) ke polymer e sebelisoang hangata e nang le lits'ebetso tse fapaneng makaleng a fapaneng. E sebelisoa haholo meriana, lijo, litlolo, kaho le liindasteri tse ling. Bohloeki ba HPMC ke ntlha ea bohlokoa e amang ts'ebetso le ts'ebeliso ea eona. Sehloohong sena, re tšohla lintlha tse amang bohloeki ba HPMC.
1. Lisebelisoa tse tala
Bohloeki ba HPMC bo itšetlehile haholo ka ho hloeka ha thepa e tala e sebelisoang tlhahiso ea eona. Lisebelisoa tse tala tse sebelisoang tlhahisong ea HPMC li kenyelletsa selulose, methyl chloride, propylene oxide le metsi. Haeba ho na le litšila linthong tsena tse tala, li tla isoa HPMC nakong ea ts'ebetso ea tlhahiso, e leng se bakang tahlehelo ea bohloeki.
2. Mokhoa oa tlhahiso
Ts'ebetso ea tlhahiso ea HPMC e kenyelletsa mehato e 'maloa, ho kenyelletsa le karabelo ea selulose ka methyl chloride le propylene oxide, tlhoekiso le ho omisa. Ho kheloha leha e le efe ho tloha maemong a nepahetseng a ts'ebetso ho ka lebisa ho litšila sehlahisoa sa ho qetela, ho fokotsa bohloeki ba eona.
3. Litlhapi le li-catalysts
Nakong ea tlhahiso ea HPMC, solvents le catalysts sebelisoa ho bebofatsa karabelo pakeng tsa selulose, methyl chloride le propylene oxide. Haeba li-solvents le li-catalyst tsena li se na bohloeki bo phahameng, li ka silafatsa le ho fokotsa bohloeki ba sehlahisoa sa ho qetela.
4. Polokelo le lipalangoang
Polokelo le lipalangoang li boetse li supa bohloeki ba HPMC. HPMC e lokela ho bolokoa sebakeng se phodileng le se omileng ho thibela ho monya le ho senyeha ha mongobo. Ho kenyelletsa li-stabilizer tse nepahetseng le li-antioxidants nakong ea polokelo le lipalangoang ho ka thibela ho senyeha ha HPMC le ho boloka bohloeki ba eona.
5. Taolo ea boleng
Qetellong, taolo ea boleng ke ntlha ea bohlokoa ho netefatsa bohloeki ba HPMC. Baetsi ba HPMC ba lokela ho kenya tšebetsong mehato e tiileng ea taolo ea boleng ho lekola bohloeki ba lihlahisoa tsa bona. Sena se kenyeletsa ho hlahloba bohloeki ba thepa e tala, ho hlahloba boleng ba kamehla nakong ea tlhahiso, le ho hlahloba bohloeki ba sehlahisoa sa ho qetela.
Ka kakaretso, bohloeki ba HPMC bo angoa ke lintlha tse ngata, ho kenyelletsa bohloeki ba thepa e tala, ts'ebetso ea tlhahiso, li-solvents le li-catalysts tse sebelisoang, polokelo le lipalangoang, le taolo ea boleng. Ho netefatsa boleng bo phahameng ka ho fetisisa le bohloeki ba HPMC, tšebeliso ea lisebelisoa tsa boleng bo phahameng, ho khomarela ka thata ho maemo a nepahetseng a tlhahiso, tšebeliso ea lihlahisoa tse hloekileng le li-catalysts, polokelo e nepahetseng le lipalangoang tsa lihlahisoa, le mehato e tiileng ea taolo ea boleng e tlameha ho kenngoa ts'ebetsong. . Ka ho etsa joalo, bahlahisi ba ka hlahisa li-HPMC tsa boleng bo holimo tse fihlelang litlhoko tsa bareki liindastering tse fapaneng.
Nako ea poso: Jul-18-2023