Ether ea selulosee ka ntlafatsa haholo tshebetso ya seretse se metsi, mme ke sehlomathiso se seholo se amang tshebetso ya kaho ya seretse. Kgetho e utlwahalang ya di-ether tsa cellulose tsa mefuta e fapaneng, viscosity tse fapaneng, boholo bo fapaneng ba dikarolwana, maemo a fapaneng a viscosity le bongata bo eketsehileng di tla ba le tshusumetso e ntle ntlafatsong ya tshebetso ya seretse se omileng.
Hape ho na le kamano e ntle e otlolohileng pakeng tsa ho tsitsa ha samente le tekanyo ea ether ea cellulose. Ether ea cellulose e ka eketsa haholo viscosity ea seretse. Ha tekanyo e le kholoanyane, phello e ba e totobetseng haholoanyane. Tharollo ea metsi ea ether ea cellulose e nang le viscosity e phahameng e na le thixotropy e phahameng, e leng tšobotsi e kholo ea ether ea cellulose.
Phello ea ho teteana e itšetlehile ka tekanyo ea polymerization ea ether ea cellulose, mahloriso a tharollo, sekhahla sa ho beola, mocheso le maemo a mang. Thepa ea gelling ea tharollo e ikhetha ho alkyl cellulose le li-derivatives tsa eona tse fetotsoeng. Thepa ea gelation e amana le tekanyo ea ho nkeloa sebaka, mahloriso a tharollo le li-additives. Bakeng sa li-derivatives tse fetotsoeng tsa hydroxyalkyl, thepa ea gel e boetse e amana le tekanyo ea phetoho ea hydroxyalkyl. Tharollo ea 10%-15% e ka lokisetsoa MC le HPMC tse nang le viscosity e tlase, tharollo ea 5%-10% e ka lokisetsoa MC le HPMC tse nang le viscosity e mahareng, 'me tharollo ea 2%-3% e ka lokisetsoa feela MC le HPMC tse nang le viscosity e phahameng. Hangata sehlopha sa viscosity sa ether ea cellulose le sona se fuoa maemo ka tharollo ea 1%-2%.
Boima bo phahameng ba limolek'huleether ea selulosee na le bokgoni bo phahameng ba ho tenya. Li-polymer tse nang le boima bo fapaneng ba limolek'hule li na le viscosities tse fapaneng tharollong e tšoanang ea mahloriso. Tekanyo e phahameng. Viscosity e reriloeng e ka finyelloa feela ka ho eketsa ether e kholo ea cellulose ether e nang le boima bo tlase ba limolek'hule. Viscosity ea eona ha e itšetlehe haholo ka sekhahla sa ho beola, 'me viscosity e phahameng e fihla ho viscosity e reriloeng, 'me palo e hlokahalang ea ho eketsa e nyane, 'me viscosity e itšetlehile ka bokhoni ba ho tenya. Ka hona, ho fihlela botsitso bo itseng, tekanyo e itseng ea ether ea cellulose (mahloriso a tharollo) le viscosity ea tharollo li tlameha ho netefatsoa. Mocheso oa gel oa tharollo le oona o fokotseha ka ho latellana ka keketseho ea mahloriso a tharollo, le li-gel mochesong oa kamore kamora ho fihla ho mahloriso a itseng. Mahloriso a gelling a HPMC a phahame haholo mochesong oa kamore.
Nako ea poso: Mmesa-28-2024