tsebisa
Hydroxypropyl methylcellulose (HPMC) ke cellulose ether e sebelisoang haholo liindastering tse fapaneng tse kang lijo, meriana, le kaho e le setenya, emulsifier, le stabilizer. Indastering ea kaho, HPMC hangata e sebelisoa e le tlatsetso ea thepa e thehiloeng ho samente ho fihlela thepa e lakatsehang joalo ka ho sebetsa, ho boloka metsi le ho tšoarella. Liphuputso li fumane hore ho eketsa HPMC ho thepa e thehiloeng ho samente ho liehisa ts'ebetso ea hydration ea samente, e qetellang e ama nts'etsopele ea matla a thepa e thehiloeng ho samente.
Phello ea HPMC ho hydration ea samente
Cement hydration ke karabelo e rarahaneng ea lik'hemik'hale e kenyelletsang karabelo ea metsi ka likaroloana tse omeletseng tsa samente. Nakong ea ts'ebetso ea hydration, likaroloana tsa samente li itšoara ka metsi ho etsa lihlahisoa tse sa tšoaneng tsa hydration, tse thusang ho ntlafatsa matla a thepa e thehiloeng ho samente. Liphuputso li fumane hore tlatsetso ea HPMC ho thepa e thehiloeng ho samente e ka liehisa samente hydration, kahoo ea fetola sekhahla le boholo ba ntlafatso ea matla.
E 'ngoe ea mabaka a ka sehloohong a ho lieha ha hydration ea samente ke thepa ea ho boloka metsi ea HPMC. HPMC ke hydrophilic polymer e monyang metsi le ho ruruha ho etsa sebopeho se kang gel. Ha HPMC e eketsoa linthong tse thehiloeng ho samente, e monya metsi ho tsoa motsoakong, ka hona e fokotsa metsi a mahala a hlokahalang ho nosetsa samente. Sena le sona se liehisa tšebetso ea hydration, kaha karabelo ea samente ka metsi e hloka phepelo e lekaneng ea metsi.
Ntho e 'ngoe e tlatsetsang ho lieha ha samente hydration ke adsorption ea HPMC holim'a likaroloana tsa samente. HPMC e na le kamano e phahameng ea likaroloana tsa samente ka lebaka la polarity ea eona. E ka adsorbed holim'a likaroloana tsa samente 'me ea theha mokoallo oa' mele ho fokotsa ho kopana pakeng tsa limolek'hule tsa metsi le likaroloana tsa samente. Sena le sona se liehisa karabelo ea samente ka metsi, e leng se etsang hore samente e liehe.
Ho eketsoa ha HPMC ho lisebelisoa tse thehiloeng ho samente ho tla ama ts'ebetso ea nucleation le kholo ea kristale ea lihlahisoa tsa hydration. Hydration ea samente e kenyelletsa ho thehoa ha mekhahlelo e sa tšoaneng ea kristale, e kang calcium silicate hydrate (CSH) le calcium hydroxide (CH). HPMC e ka thibela nucleation le khōlo ea kristale ea tse ling tsa mekhahlelo ena, e leng ho fokotsang metsi a samente.
Mokhoa oa ho lieha ha hydration ea samente
Mokhoa o ka sehloohong oo HPMC e liehisang hydration ea samente ke ho thehoa ha mokoallo oa 'mele pakeng tsa likaroloana tsa samente le metsi. Ha HPMC e hasane ka metsing, e theha matrix e kang gel e ka koahelang likaroloana tsa samente le ho fokotsa ho fumaneha ha metsi a sa lefelloeng bakeng sa samente hydration. Sena le sona se liehisa karabelo ea samente ka metsi, e leng se bakang tieho ho nts'etsopele ea matla a thepa e thehiloeng ho samente.
Mochine o mong ke adsorption ea HPMC holim'a likaroloana tsa samente. HPMC e na le kamano e phahameng ea likaroloana tsa samente ka lebaka la polarity ea eona. E ka adsorbed holim'a likaroloana tsa samente 'me ea theha mokoallo oa' mele ho fokotsa ho kopana pakeng tsa limolek'hule tsa metsi le likaroloana tsa samente. Sena se boetse se fokotsa karabelo ea samente ka metsi.
HPMC e ka boela ea sebelisana le likarolo tse sa tšoaneng tsa samente, tse kang li-ion tsa calcium, kahoo li ama ts'ebetso ea nucleation le khōlo ea kristale ea lihlahisoa tsa hydration. HPMC e ka thibela nucleation le khōlo ea kristale ea tse ling tsa mekhahlelo ena, e leng ho fokotsang metsi a samente.
ha re phethela
Ho eketsoa ha HPMC ho thepa ea samente ho ka liehisa samente hydration, ka hona ho fetola sekhahla le boholo ba nts'etsopele ea matla. The mochine oa lieha samente hydration ke haholo-holo ka lebaka la ho thehoa ha mokoallo 'meleng pakeng tsa likaroloana samente le metsi, e leng adsorbed holim'a likaroloana samente le ho thibela nucleation le kristale kgolo tshebetso ya dihlahiswa hydration. Ho utloisisa mekhoa eo ka eona HPMC e thibelang metsi a samente ho ka re fa monyetla oa ho ntlafatsa ts'ebeliso ea HPMC ka thepa ea samente ho fumana thepa e lakatsehang ha re ntse re boloka matla a ntlafatso ea thepa ea samente.
Nako ea poso: Oct-24-2023