Ntlha ea pele e amang ho bolokoa ha metsi hoHydroxypropyl methylcellulose(HPMC)dihlahiswa ke tekanyo ya phetolo (DS). DS e bolela palo ya dihlopha tsa hydroxypropyl le methyl tse hoketsweng yuniti ka nngwe ya cellulose. Ka kakaretso, ha DS e le hodimo, thepa ya ho boloka metsi ya HPMC e ba betere. Lebaka ke hobane DS e eketsehileng e lebisa dihlopheng tse ngata tse ratang metsi tse nang le mokokotlo wa cellulose, e leng se dumellang tshebedisano e matla le dimolek'hule tsa metsi le bokgoni bo ntlafetseng ba ho tshwara metsi.
Ntlha e 'ngoe ea bohlokoa e susumetsang ho boloka metsi ke boima ba limolek'hule ba HPMC. Boima ba limolek'hule bo ama ho hlaka ha litharollo tsa HPMC, 'me li-polymer tse boima ba limolek'hule tse phahameng hangata li bontša litšobotsi tse betere tsa ho boloka metsi. Boholo bo boholo ba li-polymer tsena bo etsa sebopeho se pharaletseng sa marang-rang, se eketsang ho hokahana le limolek'hule tsa metsi 'me ka lebaka leo se ntlafatsa ho boloka metsi. Leha ho le joalo, ho bohlokoa ho fumana tekano, kaha boima bo phahameng haholo ba limolek'hule bo ka fella ka ho eketseha ha ho hlaka le ho fokotseha ha bokhoni ba ho sebetsa, e leng se etsang hore ho be thata ho sebetsana kapa ho sebelisa lihlahisoa tsa HPMC lits'ebetsong tse itseng.
Ho feta moo, mahloriso a HPMC mofuteng le ona a bapala karolo ea bohlokoa ho bolokeng metsi. Mahlakore a phahameng a HPMC ka kakaretso a lebisa ho beng le litšobotsi tse ntle tsa ho boloka metsi. Lebaka ke hobane mahloriso a phahameng a eketsa palo ea libaka tse ratang metsi tse fumanehang bakeng sa ho monya metsi, e leng se fellang ka bokhoni bo eketsehileng ba ho tšoara metsi. Leha ho le joalo, mahloriso a phahameng haholo a ka lebisa ho eketseha ha viscosity, e leng se etsang hore motsoako o be thata ho o sebetsana le ho o sebelisa. Ho bohlokoa ho fumana mahloriso a nepahetseng a HPMC ho latela ts'ebeliso e itseng ho fihlela litšobotsi tse lakatsehang tsa ho boloka metsi ntle le ho beha sehlahisoa kotsing ea ho sebetsa.
Ntle le mabaka ana a mantlha, mabaka a mang a fapaneng a ka susumetsa litšobotsi tsa ho boloka metsi tsaHPMClihlahisoa. Mofuta le bongata ba lintho tse eketsoang tse sebelisoang moetsong li ka ba le tšusumetso e kholo. Mohlala, ho eketsoa ha li-plasticizer kapa li-rheology modifiers ho ka ntlafatsa ho boloka metsi ka ho fetola sebopeho le tšebelisano ea HPMC le limolek'hule tsa metsi. Mabaka a tikoloho a kang mocheso le mongobo le 'ona a ka ama ho boloka metsi, kaha liparamente tsena li susumetsa sekhahla sa mouoane le ho monngoa ha metsi. Thepa ea substrate kapa ea bokaholimo e ka ama ho boloka metsi haholoanyane, kaha liphapang tsa porosity kapa hydrophilicity li ka ama bokhoni ba substrate ba ho monya le ho boloka metsi.
Litšobotsi tsa ho boloka metsi tsa lihlahisoa tsa HPMC li susumetsoa ke lintlha tse fapaneng, ho kenyeletsoa tekanyo ea ho nkeloa sebaka, boima ba limolek'hule, mahloriso, lintho tse ekelitsoeng, lintlha tsa tikoloho le litšobotsi tsa substrate. Ho utloisisa lintlha tsena ho bohlokoa haholo ho thehengLihlahisoa tse thehiloeng ho HPMCbakeng sa lits'ebetso tse fapaneng. Ka ho ntlafatsa lintlha tsena, bahlahisi ba ka ntlafatsa litšobotsi tsa ho boloka metsi tsa HPMC le ho netefatsa katleho ea eona liindastering tse kang meriana, kaho le tlhokomelo ea botho. Lipatlisiso le nts'etsopele e eketsehileng lefapheng lena li tla tsoela pele ho atolosa kutloisiso ea rona ea lintlha tse susumetsang ho boloka metsi lihlahisoa tsa HPMC le ho nolofalletsa nts'etsopele ea mekhoa e sebetsang le e sebetsang haholoanyane.
Nako ea poso: Pulungoana-02-2023