Hydroxypropyl methylcellulose (HPMC) ke ether e qhibilihang ka metsing e seng ea ionic cellulose e sebelisoang haholo thepa ea mohaho, meriana, lijo, lihlahisoa tsa tlhokomelo ea botho le liphahlo. Lirapeng tsa indasteri le lipente, HPMC e fetohile tlatsetso ea bohlokoa ka lebaka la thepa ea eona e ikhethang ea 'mele le ea lik'hemik'hale. Mosebetsi oa eona o ka sehloohong ke ho sebetsa e le motenya, stabilizer, moemeli oa ho etsa lifilimi le moemeli oa taolo ea rheology ho ntlafatsa ts'ebetso, botsitso ba polokelo le boleng ba ho roala ba liphahlo le lipente.
1. Litšobotsi tsa motheo tsa HPMC
HPMC ke motsoako o fumanoang ka ho fetola selulose ea tlhaho ka lik'hemik'hale. E na le litšobotsi tse latelang tsa bohlokoa tsa 'mele le tsa lik'hemik'hale, tse etsang hore e sebelisoe haholo ho lirapeng tsa indasteri le lipente:
Ho qhibiliha ha metsi: HPMC e na le ho qhibiliha ha metsi ka metsing a batang, ho etsa tharollo e hlakileng ea viscous e thusang ho ntlafatsa viscosity ea pente.
Thermal gelability: Ka mocheso o itseng, HPMC e tla etsa gel ebe e khutlela sebakeng sa tharollo ka mor'a ho pholile. Tšobotsi ena e e lumella ho fana ka ts'ebetso e ntle ea ho roala tlas'a maemo a khethehileng a kaho.
Lintho tse ntle tsa ho etsa lifilimi: HPMC e ka etsa filimi e tsoelang pele ha pente e omella, e ntlafatsa ho khomarela le ho tšoarella ha seaparo.
Botsitso: E na le khanyetso e phahameng ea li-acids, metheo le li-electrolyte, ho netefatsa botsitso ba ho roala tlas'a maemo a fapaneng a polokelo le tšebeliso.
2. Mesebetsi e ka sehloohong ea HPMC ka liaparo tsa indasteri le lipente
2.1 Thickener
Lirapeng tsa indasteri, phello e matla ea HPMC e bohlokoa haholo. Tharollo ea eona e na le li-viscosity tse phahameng le thepa e ntle ea ho kuta, ke hore, nakong ea ts'ebetso e tsosang kapa ea ho penta, viscosity e tla fokotseha ka nakoana, kahoo e nolofalletse ho hahoa ha pente, 'me viscosity e tla hlaphoheloa kapele ka mor'a hore mohaho o emisoe ho thibela pente. ho tloha ho thetheha. Thepa ena e netefatsa ts'ebeliso ea ho roala le ho fokotsa ho fokotseha.
2.2 Taolo ea thuto ea bolumeli
HPMC e na le tšusumetso e kholo ho rheology ea liphahlo. E boloka viscosity e nepahetseng ea liaparo nakong ea polokelo 'me e thibela liphahlo hore li se ke tsa senyeha kapa tsa rarolloa. Nakong ea ts'ebeliso, HPMC e fana ka thepa e nepahetseng ea boemo ho thusa pente ho ajoa ka ho lekana holim'a bokaholimo ba kopo le ho etsa lesela le boreleli. Ho phaella moo, thepa ea eona ea ho kuta moriri e ka fokotsa matšoao a borashe kapa matšoao a roll a hlahisoang nakong ea ts'ebetso ea kopo le ho ntlafatsa ponahalo ea ponahalo ea filimi ea ho qetela ea ho roala.
2.3 Moemeli oa ho etsa lifilimi
Thepa ea ho etsa filimi ea HPMC e thusa ho ntlafatsa ho khomarela le matla a filimi ea liphahlo. Nakong ea ts'ebetso ea ho omisa, filimi e entsoeng ke HPMC e na le boima bo botle le elasticity, e ka ntlafatsang ho hanyetsa le ho roala ha seaparo, haholo-holo lits'ebetsong tse ling tse hlokahalang haholo tsa indasteri, tse kang likepe, likoloi, joalo-joalo, HPMC The thepa ea ho etsa filimi e ka ntlafatsa ka katleho ho tšoarella ha ho roala.
2.4 Setsibotsi
Joalo ka stabilizer, HPMC e ka thibela pula ea li-pigments, li-filler le likaroloana tse ling tse tiileng mefuteng ea ho roala, ka hona e ntlafatsa botsitso ba polokelo ea liphahlo. Sena ke sa bohlokoa haholo bakeng sa litlolo tse entsoeng ka metsi. HPMC e ka thibela delamination kapa agglomeration ea liphahlo nakong ea polokelo le ho netefatsa boleng ba sehlahisoa ka nako e telele ea polokelo.
3. Tšebeliso ea HPMC ka liphahlo tse fapaneng
3.1 Liaparo tse entsoeng ka metsi
Liaparo tse thehiloeng metsing li fumane tlhokomelo e kholo lilemong tsa morao tjena ka lebaka la botsoalle ba tsona ba tikoloho le tlhahiso e tlaase ea "volatile organic compound" (VOC). HPMC e sebelisoa haholo ka litlolo tse thehiloeng metsing. Joaloka motenya le stabilizer, HPMC e ka ntlafatsa ka katleho botsitso ba polokelo le ho sebetsa ha liphahlo tse thehiloeng metsing. E fana ka taolo e babatsehang ea ho phalla ha maemo a mocheso o tlase kapa o phahameng, ho etsa hore pente e be boreleli ha e fafatsoa, e phunyeletsoa kapa e phuthoa.
3.2 Pente ea latex
Pente ea latex ke e 'ngoe ea liaparo tse sebelisoang ka ho fetisisa tsa meralo kajeno. HPMC e sebelisoa e le moemeli oa taolo ea rheology le motenya ka pente ea latex, e ka fetolang ponahalo ea pente ea latex, ea ntlafatsa ho ata ha eona, le ho thibela filimi ea pente hore e se ke ea senyeha. Ho feta moo, HPMC e na le phello e betere ea taolo ea ho hasana ha pente ea latex mme e thibela likarolo tsa pente hore li se ke tsa lula kapa tsa stratifying nakong ea polokelo.
3.3 Pente e entsoeng ka oli
Le hoja tšebeliso ea litlolo tse entsoeng ka oli e fokotsehile kajeno ka litlhoko tse ntseng li eketseha tsa tšireletso ea tikoloho, li ntse li sebelisoa haholo libakeng tse itseng tsa indasteri, tse kang litšepe tse sireletsang. HPMC e sebetsa e le moemeli ea emisang le ho laola rheology ka har'a litlolo tse thehiloeng ho oli ho thibela ho tsitsa ha mmala le ho thusa ho etsa hore pente e be le boemo bo betere le ho khomarela nakong ea kopo.
4. Mokhoa oa ho sebelisa le litekanyetso tsa HPMC
Palo ea HPMC e sebelisoang liphahlo hangata e khethoa ke mofuta oa ho roala le litlhoko tse khethehileng tsa kopo. Ka kakaretso, palo ea tlatsetso ea HPMC hangata e laoloa pakeng tsa 0.1% le 0.5% ea boima bohle ba ho roala. Mokhoa oa ho eketsa hangata o kenyelletsa phofo e ommeng ka kotloloho kapa tharollo e lokiselitsoeng esale pele ebe oa eketsoa. Phello ea solubility le viscosity adjustment ea HPMC e angoa ke mocheso, boleng ba metsi le maemo a susumetsang. Ka hona, mokhoa oa ho sebelisa o hloka ho fetoloa ho latela maemo a sebele a ts'ebetso.
Hydroxypropyl methylcellulose (HPMC) e sebelisoa e le motenya, moemeli oa ho laola rheology, moemeli oa ho etsa lifilimi le stabilizer ka liaparo tsa indasteri le lipente, ho ntlafatsa haholo ts'ebetso ea kaho, botsitso ba polokelo le filimi ea ho qetela ea ho roala. boleng. Ka nts'etsopele ea liphahlo tse silafatsang tikoloho le tlhokahalo e ntseng e eketseha ea 'maraka bakeng sa liphahlo tse sebetsang hantle, HPMC e tla tsoelapele ho phetha karolo ea bohlokoa lijaneng tsa indasteri tse tlang. Ka tšebeliso e utloahalang ea HPMC, thepa ea 'mele le ea lik'hemik'hale ea ho roala e ka ntlafatsoa ka katleho,' me ho tšoarella le ho khabisa ho ka ntlafatsoa.
Nako ea poso: Sep-13-2024