Hydroxyethyl cellulose (HEC) e lula e qhibiliha haholo ka metsing ho feta mocheso o pharaletseng, esita le libakeng tse nang le mocheso o phahameng moo lik'hemik'hale tse ling tsa cellulose ethers tse seng tsa ionic tse kang methyl cellulose (MC) le hydroxypropyl methyl cellulose (HpMC) li bonts'ang lintlha tsa turbidity.Ho hlakisa sesosa sa ho qhibiliha ho hoholo ha HEC, ho itšetleha ka mocheso oa motsoako oa metsi nH bakeng sa yuniti e 'ngoe le e' ngoe ea glucopyran ka lisampole tsa HEC ho ile ha hlahlojoa ka mekhahlelo e latelang ea mocheso ho tloha ho 10 ho ea ho 70 ° C ho sebelisoa litekanyo tse phahameng ka ho fetisisa tsa dielectric spectrum ho fihlela ho 50 GHz.
Thutong ena, lisampole tsa HEC li ile tsa hlahlojoa bakeng sa palo ea molar ea li-hydroxyethyl substitutions (MS) tsa yuniti e 'ngoe le e' ngoe ea glucose pyran ho tloha 1.3 ho ea 3.6.Mehlala eohle ea HEC e ile ea qhaloa ka metsing ka har'a mocheso oa mocheso o hlahlobiloeng 'me ha o bontše lintlha tsa moferefere.Boleng ba nH ba disampole tsa HEC tse nang le MS 1.3 ke 14 ho 20 °C, mme bo fokotseha butle ha mocheso o ntse o phahama, mme o theohela ho 10 ho 70 °C.Boleng ba PH ba sampole ea HEC ho hlakile hore bo boholo ho feta bonyane ba bohlokoa ba nH ba hoo e ka bang.5 Li-cellulose ether tse kang MC le HpMC li tlameha ho qhibiliha metsing, esita le ka har'a mocheso o phahameng.
Leha ho le joalo, limolek'hule tsa HEC li qhibiliha metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.3 ke 14 ho 20 °C, e theoha butle ha mocheso o nyoloha, 'me e theohela ho 10 ho 70 °C.Boleng ba nH ba sampole ea HEC ho hlakile hore bo boholo ho feta bonyane ba bohlokoa ba nH ba hoo e ka bang.5 Li-cellulose ether tse kang MC le HpMC li tlameha ho qhibiliha metsing, esita le ka har'a mocheso o phahameng.Leha ho le joalo, limolek'hule tsa HEC li qhibiliha metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.
Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.3 ke 14 ho 20 °C, e theoha butle ha mocheso o nyoloha, 'me e theohela ho 10 ho 70 °C.Boleng ba nH ba sampole ea HEC ho hlakile hore bo boholo ho feta bonyane ba bohlokoa ba nH ba hoo e ka bang.5 Li-cellulose ether tse kang MC le HpMC li tlameha ho qhibiliha metsing, esita le ka har'a mocheso o phahameng.Leha ho le joalo, limolek'hule tsa HEC li qhibiliha metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.
Boleng ba nH ba sampole ea HEC ho hlakile hore bo boholo ho feta bonyane ba bohlokoa ba nH ba hoo e ka bang.5 Li-cellulose ether tse kang MC le HpMC li tlameha ho qhibiliha metsing, esita le ka har'a mocheso o phahameng.Leha ho le joalo, limolek'hule tsa HEC li qhibiliha metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.Boleng ba nH ba sampole ea HEC ho hlakile hore bo boholo ho feta bonyane ba bohlokoa ba nH ba hoo e ka bang.5 Li-cellulose ether tse kang MC le HpMC li tlameha ho qhibiliha metsing, esita le ka har'a mocheso o phahameng.Leha ho le joalo, limolek'hule tsa HEC li qhibiliha metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.
Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.Limolek'hule tsa HEC li qhibiliha ka metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.Limolek'hule tsa HEC li qhibiliha ka metsing ho feta mocheso o pharaletseng.Ho itšetlehile ka mocheso oa nH oa li-sampuli tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) e bonolo 'me e tšoana le e mong.Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba hydration / dehydration ea li-sampuli tsa HEC bo laoloa haholo ke lihlopha tsa bona tse nkeloang sebaka.
Nako ea poso: Mar-04-2022