Hydroxypropylmethylcellulose (HPMC) ke polymer e sebetsang ka bongata e nkiloeng ho selulose ea tlhaho. E sebelisoa hangata liindastering tse fapaneng, ho kenyelletsa le tsa meriana, lijo, kaho le litlolo. Tlhahiso ea HPMC e kenyelletsa mefuta e fapaneng ea lisebelisoa tse tala le ts'ebetso ea mehato e mengata.
Cellulose:
Mohloli: Lintho tse ka sehloohong tse tala tsa HPMC ke cellulose, lik'habohaedreite tse rarahaneng tse fumanoang marakong a lisele tsa semela. Mohloli o atileng haholo oa selulose bakeng sa tlhahiso ea HPMC ke makhasi a lehong, empa mehloli e meng e joalo ka lithara tsa k'hothone le eona e ka sebelisoa.
Tokisetso: Cellulose e atisa ho phekoloa ho tlosa litšila ebe e etsoa ka mokhoa o loketseng bakeng sa phetoho e eketsehileng.
Motheo:
Mofuta: Sodium hydroxide (NaOH) kapa potassium hydroxide (KOH) hangata e sebelisoa e le motheo nakong ea mekhahlelo ea pele ea tlhahiso ea HPMC.
Mosebetsi: Alkali e sebelisoa ho phekola cellulose, e etsa hore e ruruhe le ho senya sebopeho sa eona. Mokhoa ona, o bitsoang alkalization, o lokisa selulose bakeng sa karabelo e eketsehileng.
Alkali etherifying agent:
Hydroxypropylating agent: Propylene oxide hangata e sebelisoa ho hlahisa lihlopha tsa hydroxypropyl mokokotlong oa cellulose. Mohato ona o fana ka ho qhibiliha le lintho tse ling tse lakatsehang ho selulose.
Methylating agents: Methyl chloride kapa dimethyl sulfate hangata e sebelisoa ho kenyelletsa lihlopha tsa methyl holim'a sebopeho sa cellulose, ka hona ho ntlafatsa thepa ea eona ka kakaretso.
Methylating agent:
Methanol: Methanol e atisa ho sebelisoa e le solvent le reactant ka mekhoa ea methylation. E thusa ho hlahisa lihlopha tsa methyl ka har'a liketane tsa cellulose.
Moemeli oa Hydroxypropylating:
Propylene oxide: Ke thepa e tala ea bohlokoa bakeng sa ho hlahisa lihlopha tsa hydroxypropyl ka selulose. Boitšoaro pakeng tsa propylene oxide le cellulose bo etsahala tlas'a maemo a laoloang.
catalyst:
Acid Catalyst: Sesebelisoa sa asiti, joalo ka sulfuric acid, se sebelisetsoa ho khothaletsa karabelo ea etherification. Ba thusa ho laola litekanyetso tsa karabelo le thepa ea sehlahisoa.
Solvent:
Metsi: Metsi a atisa ho sebelisoa e le solvent ka mekhahlelo e fapaneng ea ts'ebetso ea tlhahiso. E bohlokoa bakeng sa ho qhibilihisa li-reactants le ho khothaletsa karabelo lipakeng tsa cellulose le li-etherifying agents.
Neutralizer:
Sodium hydroxide (NaOH) kapa potassium hydroxide (KOH): e sebelisetsoa ho fokotsa li-catalyst tsa asiti le ho fetola pH nakong ea ho kopanya.
purifier:
Filter Aids: Mefuta e fapaneng ea lithuso tsa ho sefa e ka sebelisoa ho tlosa litšila le lihlahisoa tse sa batleheng tse tsoang motsoakong oa karabelo.
Lisebelisoa: Ho hlatsoa ka metsi kapa lihlahisoa tse ling ho thusa ho tlosa lik'hemik'hale tse setseng le litšila sehlahisoa sa ho qetela.
Desiccant:
Ho omisa moea kapa ontong: Kamora ho hloekisoa, sehlahisoa se ka omisoa ke moea kapa ontong ho tlosa mokelikeli o setseng le mongobo.
Setsi sa taolo ea boleng:
Lisebelisoa tsa Analytical: Li-reagents tse fapaneng li sebelisetsoa merero ea taolo ea boleng ho netefatsa hore lihlahisoa tsa HPMC li kopana le ts'ebetso le litlhaloso tse hlokahalang.
Tlhahiso ea hydroxypropyl methylcellulose e kenyelletsa ho fetola selulose ka letoto la karabelo ea lik'hemik'hale. Lisebelisoa tse tala li kenyelletsa selulose, alkali, etherifying agent, catalyst, solvent, neutralizing agent, e hloekisang le desiccant, tse phethang karolo ea bohlokoa ts'ebetsong ea ho kopanya. Maemo a ikhethileng le li-reagents tse sebelisoang li ka fapana ho latela thepa e lakatsehang le ts'ebeliso ea sehlahisoa sa ho qetela sa hydroxypropyl methylcellulose.
Nako ea poso: Dec-21-2023