Hydroxyethyl cellulose (HEC)e dula e qhibiliha ka metsing haholo maemong a fapaneng a mocheso, esita le libakeng tse nang le mocheso o phahameng moo di-ether tse ding tse sa fetoheng ka dikhemikhale tsa cellulose tse kang methyl cellulose (MC) le hydroxypropyl methyl cellulose (HpMC) di bontshang dintlha tsa turbidity. Ho hlakisa sesosa sa ho qhibiliha ho hoholo ha HEC, ho itshetleha ha mocheso wa nH ya motsoako wa metsi bakeng sa yuniti e nngwe le e nngwe ya glucopyran disampoleng tsa HEC ho ile ha hlahlojwa maemong a latelang a mocheso ho tloha ho 10 ho isa ho 70 °C ho sebediswa ditekanyo tse phahameng haholo tsa dielectric spectrum ho fihlela ho 50 GHz.
Phuputsong ena, disampole tsa HEC di hlahlobilwe bakeng sa palo ya molar ya di-substitution tsa hydroxyethyl (MS) tsa yuniti ka nngwe ya glucose pyran e tlohang ho 1.3 ho isa ho 3.6. Disampole tsohle tsa HEC di qhibilihile ka metsing ka hara mocheso o hlahlobilweng mme ha di a ka tsa bontsha dintlha tsa turbidity. 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 nyoloha, mme bo theohela ho 10 ho 70 °C. Boleng ba PH ba sampole ya HEC bo hlakile hore bo boholo ho feta boleng bo tlase ba nH ba bohlokwa ba hoo e ka bang 5 Cellulose ethers tse kang MC le HpMC di lokela ho qhibilihiswa ka metsing, esita le mochesong o phahameng.
Leha ho le jwalo, dimolekhule tsa HEC di qhibiliha ka metsing hodima mocheso o pharaletseng. Ho itshetleha ha mocheso wa nH ya disampole tsa HEC le triglycol (metswako ya mohlala ya di-substituents tsa HEC) ho bobebe mme ho tshwana. Pono ena e fana ka maikutlo a matla a hore boitshwaro ba ho metsa/ho fellwa ke metsi ha disampole tsa HEC bo laolwa haholo ke dihlopha tsa tsona tse nketsweng sebaka. 3 ke 14 ho 20 °C, e fokotseha butle ha mocheso o ntse o phahama, mme e theohela ho 10 ho 70 °C. Boleng ba nH ba sampole ya HEC bo hlakile hore bo boholo ho feta boleng bo tlase ba bohlokwa ba nH ba hoo e ka bang 5 Cellulose ethers tse kang MC le HpMC di lokela ho qhibilihiswa ka metsing, esita le maemong a mocheso o phahameng. Leha ho le jwalo, dimolekhule tsa HEC di qhibiliha ka metsing hodima maemo a mocheso o pharaletseng. Ho itshetleha ha mocheso wa nH ya disampole tsa HEC le triglycol (metswako ya mohlala ya di-substituents tsa HEC) ho bobebe mme di tshwana.
Tlhokomeliso ena e fana ka maikutlo a matla a hore boits'oaro ba metsi/ho fela ha metsi ha disampole tsa HEC bo laoloa haholo ke lihlopha tsa tsona tse nkeloang sebaka. 3 ke 14 ho 20 °C, e fokotseha butle ha mocheso o ntse o phahama, 'me e theohela ho 10 ho 70 °C. Boleng ba nH ba sampole ea HEC bo hlakile hore bo boholo ho feta boleng bo tlase ba bohlokoa ba nH ba hoo e ka bang 5 Cellulose ethers joalo ka MC le HpMC li tlameha ho qhibiliha ka metsing, esita le maemong a mocheso o phahameng. Leha ho le joalo, limolek'hule tsa HEC li qhibiliha ka metsing maemong a fapaneng a mocheso. Ho itšetleha ha mocheso oa nH eaHECdisampole le triglycol (metswako ya mohlala ya dintho tse nkelang HEC sebaka) di bobebe mme di tshwana. Tlhokomeliso ena e fana ka maikutlo a matla a hore boitshwaro ba metsi/ho fellwa ke metsi mmeleng ba disampole tsa HEC bo laolwa haholo ke dihlopha tsa tsona tse nketsweng sebaka.
Boleng ba nH ba sampole ea HEC bo hlakile hore bo boholo ho feta boleng bo tlase ba bohlokoa ba nH ba hoo e ka bang 5 Li-ether tsa cellulose tse kang MC le HpMC li tlameha ho qhibiliha ka metsing, esita le maemong a mocheso o phahameng. Leha ho le joalo, limolek'hule tsa HEC li qhibiliha ka metsing maemong a mocheso o pharaletseng. Ho itšetleha ka mocheso oa nH oa lisampole tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) ho bonolo 'me lia tšoana. Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba metsi/ho felloa ke metsi ha lisampole tsa HEC bo laoloa haholo ke lihlopha tsa tsona tse nkeloang sebaka. Boleng ba nH ba sampole ea HEC bo hlakile hore bo boholo ho feta boleng bo tlase ba bohlokoa ba nH ba hoo e ka bang 5 Li-ether tsa cellulose tse kang MC le HpMC li tlameha ho qhibiliha ka metsing, esita le maemong a mocheso o phahameng. Leha ho le joalo, limolek'hule tsa HEC li qhibiliha ka metsing maemong a mocheso o pharaletseng. Ho itšetleha ka mocheso oa nH oa lisampole tsa HEC le triglycol (metsoako ea mohlala ea li-substituents tsa HEC) ho bonolo 'me lia tšoana.
Tlhokomeliso ena e fana ka maikutlo a matla a hore boits'oaro ba ho nosetsa/ho felloa ke metsi ha disampole tsa HEC bo laoloa haholo ke lihlopha tsa tsona tse nkeloang sebaka. Limolek'hule tsa HEC li qhibiliha ka metsing ka tekanyo e pharaletseng ea mocheso. Ho itšetleha ha mocheso oa nH ea lisampole tsa HEC le triglycol (metsoako ea mohlala ea lintho tse nkeloang sebaka tsa HEC) ho bonolo 'me lia tšoana. Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba ho nosetsa/ho felloa ke metsi ha lisampole tsa HEC bo laoloa haholo ke lihlopha tsa tsona tse nkeloang sebaka.HECLimolek'hule li qhibiliha metsing ka tekanyo e pharaletseng ea mocheso. Ho itšetleha ha mocheso oa nH ea lisampole tsa HEC le triglycol (metsoako ea mohlala ea lintho tse nkeloang sebaka ke HEC) ho bonolo 'me lia tšoana. Tlhokomeliso ena e fana ka maikutlo a matla a hore boitšoaro ba metsi/ho felloa ke metsi ha lisampole tsa HEC bo laoloa haholo ke lihlopha tsa tsona tse nkeloang sebaka.
Nako ea poso: Mmesa-25-2024