Hydroxypropyl methylcellulose (HPMC) ke polymer e feto-fetohang le e sebelisoang haholo indastering e fapaneng, e tsebahalang ka thepa le lits'ebetso tsa eona tse ikhethang. Motsoako ona ke motsoako oa cellulose, polymer ea tlhaho e fumanoang maboteng a sele ea limela. Ho utloisisa sebopeho sa hydroxypropylmethylcellulose, ho hlokahala ho teba ka sebopeho le tlhahiso ea motsoako ona oa cellulose.
Sebopeho sa selulose:
Cellulose ke k'habohaedreite e rarahaneng e nang le ketane e otlolohileng ea li-unit tsa β-D-glucose tse hokahantsoeng ke litlamo tsa β-1,4-glycosidic. Liketane tsena tsa glucose li tšoaroa hammoho ka litlamo tsa haedrojene ho theha sebopeho se tiileng se otlolohileng. Cellulose ke karolo e ka sehloohong ea sebopeho sa mabota a sele ea limela, e fanang ka matla le ho tiea ho lisele tsa limela.
Lintho tse tsoang ho Hydroxypropyl Methylcellulose:
Hydroxypropyl methylcellulose e hlahisoa ka ho fetola cellulose ka lik'hemik'hale le ho kenya lihlopha tsa hydroxypropyl le methyl ka har'a ketane e kholo ea cellulose. Hangata tlhahiso e kenyelletsa mehato e latelang:
Karabelo ea ho fetola etherification:
Methylation: Ho phekola cellulose ka tharollo ea alkaline le methyl chloride ho kenya lihlopha tsa methyl (-CH3) lihlopheng tsa hydroxyl (-OH) tsa cellulose.
Hydroxypropylation: Cellulose e nang le methylated e arabela hape le propylene oxide ho kenya lihlopha tsa hydroxypropyl (-CH2CHOHCH3) sebopehong sa cellulose. Ts'ebetso ena e ntlafatsa ho qhibiliha ha metsi le ho fetola thepa ea 'mele ea cellulose.
tlhoekiso:
Selulose e fetotsoeng e ntoo hloekisoa ho tlosa di-reagent tse sa arajoang, dihlahiswa tse setseng kapa ditshila.
Ho omisa le ho sila:
Hydroxypropyl methylcellulose e hloekisitsoeng e omisoa ebe e siloa hore e be phofo e ntle e loketseng ho sebelisoa lits'ebetsong tse fapaneng.
Lisebelisoa tsa Hydroxypropyl Methylcellulose:
Sebopeho sa hydroxypropyl methylcellulose se khetholloa ka tekanyo ea phetolo, e leng se bolelang tekanyo eo lihlopha tsa hydroxypropyl le methyl li nkang sebaka ka eona lihlopha tsa hydroxyl ka har'a ketane ea cellulose. Mekhahlelo e fapaneng ea HPMC e na le maemo a fapaneng a phetolo, e amang ho qhibiliha ha tsona, viscosity le thepa e meng.
Foromo ea lik'hemik'hale ea hydroxypropyl methylcellulose e ka hlalosoa e le (C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n)_x, moo m le n li emelang tekanyo ea phetolo.
m: tekanyo ea methylation (lihlopha tsa methyl ka yuniti ea tsoekere)
n: tekanyo ea hydroxypropylation (lihlopha tsa hydroxypropyl ka yuniti ea glucose)
x: palo ea li-unit tsa glucose ka har'a ketane ea cellulose
Likarolo le Litšebeliso:
Ho qhibiliha ha metsi: HPMC e qhibiliha ka metsing, 'me tekanyo ea ho nkeloa sebaka e ama litšobotsi tsa ho qhibiliha ha eona. E etsa tharollo e hlakileng le e tiileng ka metsing, e leng se etsang hore e lokele mefuta e fapaneng ea metsoako.
Ho tsikinyeha: Ho tsikinyeha ha tharollo ea HPMC ho itšetlehile ka lintlha tse kang boima ba limolek'hule le tekanyo ea ho nkeloa sebaka. Thepa ena e bohlokoa bakeng sa lits'ebetso tse kang meriana e hlokang mekhoa e laoloang ea ho lokolloa.
Ho Hlahisa Filimi: HPMC e ka etsa difilimi tse tshesane ha tharollo e oma, e leng se etsang hore e be molemo ho dikoahelong tsa meriana, tsa dijo le tse ding.
Di-stabilizer le Di-thickeners: Indastering ya dijo, HPMC e sebediswa e le se-thickener le se-stabilizer dihlahisweng tse fapaneng, ho kenyeletswa le disose, dijo tse monate le dintho tse besitsweng.
Ditshebediso tsa Meriana: HPMC e sebediswa haholo mefuteng ya meriana, ho kenyeletswa matlapa, dikhasepolise, le ditharollo tsa mahlo, ka lebaka la thepa ya yona ya ho lokollwa e laolwang le ho ikamahanya ha mmele.
Kaho le ho maneha: HPMC e sebediswa disebedisweng tsa kaho tse kang di-mortar, di-glue tsa dithaele le di-plaster. E boetse e sebediswa e le setefatsi le se tsitsisang dipenteng le di-coating.
Lihlahisoa tsa Tlhokomelo ea Motho ka Mong: Indastering ea litlolo le tlhokomelo ea motho ka mong, HPMC e fumanoa lihlahisoa tse kang litlolo, litlolo le li-shampoo, moo e fanang ka sebopeho le botsitso.
Hydroxypropyl methylcellulose e fumanoa ka methylation le hydroxypropylation ea cellulose. Ke polymer ea merero e mengata e nang le mefuta e mengata ea ts'ebeliso. Thepa ea eona e ikhethang e etsa hore e be ea bohlokoa liindastering tse kang meriana, lijo, kaho le tlhokomelo ea botho. Phetoho e laoloang ea cellulose e ka ntlafatsa thepa ea HPMC, ea e etsa karolo ea bohlokoa ea lihlahisoa tse ngata tseo re kopanang le tsona bophelong ba rona ba letsatsi le letsatsi.
Nako ea poso: Pherekhong-10-2024