Tšebelisong eahydroxypropyl methyl cellulose HPMC, hangata re fumana hore ha e le hantle e arotsoe ka mefuta e 'meli: ho qhibiliha hang-hang le butle. A re utloisiseng phapang lipakeng tsa ho qhibiliha kapele le ho qhibiliha butle ha hydroxypropyl methyl cellulose.
Instant HPMC e bua ka tšebeliso ea li-cross-linking agent bakeng sa phekolo ea holim'a metsi ka mokhoa oa tlhahiso, e le hore HPMC e ka qhalakanngoa ka potlako metsing a batang, empa e se tharollo ea sebele, ka mokhoa o ts'oanang o susumetsang, viscosity butle-butle e phahama, ke hore, ho qhibiliha;
HPMC e qhibilihang butle e ka boela ea bitsoa lihlahisoa tse chesang tse qhibilihang. Ha metsi a batang a kopana, a ka qhalakanngoa ka potlako metsing a chesang. Ka ho susumetsa ka ho lekana, mocheso oa tharollo o tla theohela mocheso o itseng. (Mocheso oa gel ea rona o ka bang 60 ° C), viscosity e tla hlaha butle ho fihlela gel e hlakileng le e khomarelang e thehoa.
Phapano ke ena lipakeng tsa tharollo ea hang-hang le tharollo e liehang. Haeba u na le lipotso mabapi le tsebo ena, u ka boela ua ikopanya le rona.
Hydroxypropyl methyl celluloseHPMCliehisa samente hydration
Ho eketsa hydroxypropyl methyl cellulose ho samente ho liehisa metsi a eona. Joale u tseba eng ka hore na e sebetsa joang? Ha re shebeng hydroxypropyl methyl cellulose ho liehisa hydration ea samente. Molao-motheo.
1. Khopolo-taba ea bothata ba ho tsamaea ha Ion
Re ile ra nahana hore hydroxypropyl methyl cellulose e tla eketsa viscosity ea litharollo tsa pore, e sitise sekhahla sa ho sisinyeha ha ionic, le ho liehisa hydration ea samente. Leha ho le joalo, li-ethers tse tlase tsa viscosity cellulose tekong ena li ne li e-na le bokhoni bo matla ba ho liehisa samente hydration. Ka hona, monahano ona ha oa nepahala. Pourchez et al. hape belaella khopolo-taba ena. Ha e le hantle, nako ea ho falla ha ion kapa ho falla e khutšoanyane haholo, ho bonahala eka ha e fapane le ho lieha ha hydration ea samente.
2. Ho senyeha ha alkaline
Li-polysaccharides li senyeha habonolo tlas'a maemo a alkaline ho hlahisa li-hydroxyl carboxylic acid tse liehisang ho kenngoa ha samente. Ka hona, hydration e liehang ea hydroxypropyl methyl cellulose e kanna ea bakoa ke ho senyeha ha eona ka har'a li-slurries tsa samente tsa alkaline ho theha hydroxycarboxylic acid. Leha ho le joalo, Pourchez et al. e fumane hore li-cellulose ethers li tsitsitse haholo tlas'a maemo a alkaline, li fokotsehile hanyenyane feela, 'me lihlahisoa tse senyang li ne li e-na le phello e fokolang ho liehang ha samente hydration.
3, adsorption
Adsorption e ka ba hydroxypropyl methyl cellulose block samente hydration lebaka la 'nete ke hore li-adsorbets tse ngata tsa organic li tla kengoa ka likaroloana tsa samente le lihlahisoa tsa hydration, ho thibela ho qhibiliha ha likaroloana tsa samente le kristale ea lihlahisoa tsa hydration, e le ho liehisa hydration le condensation ea samente. Pourchez et al. e fumane hore li-cellulose ethers li fumaneha habonolo holim'a lihlahisoa tsa hydration tse kang calcium hydroxide, CSH gel le calcium aluminate hydrate, empa li sa khabisoe habonolo ke mekhahlelo ea ettringite le e se nang metsi. Ho feta moo, tabeng ea cellulose ether, matla a adsorption a HEC a matla ho feta a ho ruruha ha MC. E theola litaba tsa hydroxyethyl ho HEC kapa hydroxypropyl hoHPMC, matla a adsorption a matla: ha e le lihlahisoa tsa hydration, matla a adsorption a calcium hydroxide a matla ho feta a CSH. Tlhahlobo e eketsehileng e boetse e bontša hore matla a adsorption a lihlahisoa tsa hydration le cellulose ether e amana le tieho ea samente hydration: matla a adsorption, ho feta ho totobetseng ho lieha, empa ettringite adsorption ea cellulose ether e fokola, empa sebopeho sa eona, empa sena se lieha haholo. cellulose ether ea tricalcium silicate le lihlahisoa tsa eona tsa hydration li na le adsorption e matla, ho hlakile hore e lieha ts'ebetso ea hydration ea silicate phase, palo ea adsorption ea ettringite e tlaase haholo, empa ho lieha ho thehoa ha ettringite ho hlakile, ka lebaka la ho lieha ho thehoa ha ettringite ho angoa ke Ca 2 + ho leka-lekana ka tharollo, ke katoloso ea cellulose ether. Silicate hydration ea morao-rao e ile ea tsoela pele.
Tsena ke molao-motheo oa hydroxypropyl methyl cellulose lieha samente hydration. Re tšepa hore tsebo ena e tla thusa bohle ho utloisisa hore na sehlahisoa se sebetsa joang le ho se sebelisa hamolemo.
Nako ea poso: Apr-26-2024