Hlalosa:
Metswako ea lijo e kenyeletsangli-ether tsa selulose
Tšimo ea tekheniki:
Popo ena e amana le metsoako ea lijo e nang le li-ether tsa cellulose.
Mokhoa oa morao-rao:
E se e tsebahala ka ho kenyelletsa di-ether tsa cellulose metswakong ya dijo, haholoholo metswako ya dijo e sebeditsweng, ho ntlafatsa thepa e fapaneng jwalo ka botsitso ba ho qhibilihisa le/kapa sebopeho, kapa ho ntlafatsa ho tiya nakong ya tlhahiso, e sebetswang ka mechine kapa e hadikilweng. Kopo ya patent ya Brithani GB 2 444 020 e senola metswako e jwalo ya dijo e kenyeletsang ether ya cellulose e seng ya ionic jwalo ka methylcellulose, hydroxypropyl cellulose, kapa hydroxypropyl methylcellulose. Methylcellulose le hydroxypropyl methylcellulose di na le "thepa ya gelling e ka fetolwang ke thermos". Ho hlaloswa ka ho hlaka hore ha tharollo ya metsi ya methylcellulose kapa hydroxypropyl methylcellulose e futhumatswa, sehlopha sa hydrophobic methoxy se fumanehang ka hara molek'hule se a fellwa ke metsi, mme se fetoha gel ya metsi. Ka lehlakoreng le leng, ha gel e hlahiswang e phodiswa, dihlopha tsa hydrophobic methoxy di a futhumatswa, moo gel e kgutlelang tharollong ya metsi ya pele.
Patent ea Europe EP I 171 471 e senola methylcellulose e thusang haholo mefuteng ea lijo tse tiileng tse kang meroho e tiileng, nama le soya ka lebaka la matla a eona a eketsehileng a gel. Methylcellulose e fana ka ho tiea le ho kopana ho ntlafetseng ha motsoako oa lijo tse tiileng, ka hona e fana ka maikutlo a monate a ho loma ho bareki ba jang motsoako oa lijo tse sebetsitsoeng. Ha e qhibiliha ka metsing a batang (mohlala, 5°C kapa ka tlase) pele kapa ka mor'a ho kopanya le metsoako e meng ea motsoako oa lijo, soya ea methylcellulose e fihlella bokhoni ba eona bo felletseng ba ho fana ka metsoako ea lijo tse tiileng ka matla a tiileng le a kopaneng.
Leha ho le jwalo, maemong a mang, tshebediso ya metsi a batang ha e lokele mohlahisi wa motswako wa dijo. Ka hona, ho ka ba molemo ho fana ka di-ether tsa cellulose tse fanang ka metswako ya dijo tse tiileng tse nang le thata le momahano e ntle esita le ha di-ether tsa cellulose di qhibilihiswa ka metsing a nang le mocheso wa kamore.
Hydroxyalkyl methylcellulose e kang hydroxypropyl methylcellulose (eo hape e tsejoang e le molemo mefuteng ea lijo) e tsejoa e na le modulus e tlase ea polokelo ha e bapisoa le methylcellulose. Hydroxyalkyl methylcellulose e bontšang modulus e tlase ea polokelo ha e thehe li-gel tse matla. Ho hlokahala hore ho be le likhakanyo tse phahameng bakeng sa li-gel tse fokolang le tsona (Haque, A; Richardson; Morris, ER, Gidley, MJ le Caswell, DC ho Carbohydrate Polymers22 (1993) leq.175; le Haque, A le Morris, ER1nCarbohydrate Polymers22 (1993) leq.161).
Ha di-hydroxyalkyl methylcellulose tse kang hydroxypropyl methylcellulose (tse bontshang modulus e tlase ya polokelo) di kenyeletswa metswakong ya dijo tse tiileng, ho thatafala ha tsona le ho kopana ha tsona ha di a lekana bakeng sa ditshebediso tse ding.
Ke sepheo sa tlhahiso ena ya hajwale ho fana ka hydroxyalkyl methylcellulose, haholo-holo hydroxypropyl methylcellulose, e ka bapiswang le hydroxyalkyl methylcellulose tse tsejwang, tse kang hydroxypropyl methylcellulose. Ka lehlakoreng le leng, metsoako ya dijo tse tiileng e fanwa ka ho tiya le/kapa ho kopana ho ntlafetseng.
Sepheo se kgethwang sa tlhahiso ena ke ho fana ka hydroxyalkyl methylcellulose, haholo-holo hydroxypropyl methylcellulose, e fanang ka metsoako ea lijo tse tiileng tse nang le bothata bo botle le/kapa ho kopana hantle esita le ha hydroxyalkyl methylcellulose e qhibiliha ka metsing a nang le mocheso oa kamore.
Ho makatsang ke hore ho fumanoe horehydroxyalkyl methylcellulose, haholo-holo hydroxypropyl methylcellulose, e ka sebelisoa ho lokiseng ha Ha ho bapisoa le metsoako ea lijo tse tiileng, metsoako ea lijo tse tiileng e tsejoang e na le thata e phahameng le/kapa ho kopana.
Hape ho makatsang ke hore ho fumanoe hore li-hydroxyalkyl methylcellulose tse itseng, haholo-holo hydroxypropyl methylcellulose, ha li hloke ho qhibiliha ka metsing a batang ho fana ka metsoako ea lijo tse tiileng tse tiileng le/kapa tse kopaneng hantle.
Nako ea poso: Mmesa-28-2024