1.hydroxypypyl methyl cellulose
Hydroxypypyl methylcellulosendi mitundu ya cellulose yomwe zotsatira zake ndi zogwiritsidwa ntchito zikuwonjezeka mwachangu. Ndiwopanda ma cellulose osakanizidwa ndi thonje lopangidwa kuchokera ku thonje loyeretsa, pogwiritsa ntchito ma propylen oxide ndi methyl chloride ngati zoyeserera. Mulingo wazolowa m'malo mwake 1.2 ~ 2.0. Zinthu zake zimasiyana malinga ndi kuchuluka kwa methoxyl zomwe zili ku hydroxypropyl zomwe zili.
(1) Hydroxypypyll methylcellulose imasungunuka mosavuta m'madzi ozizira, ndipo imakumana ndi zovuta pakusungunuka m'madzi otentha. Koma kutentha kwake kwamadzi otentha kumakhala kokulirapo kuposa kwa methyl cellulose. Kusungunuka m'madzi ozizira kumathandizanso kwambiri poyerekeza ndi methyl cellulose.
(2). Kutentha kumakhudzanso mamasukidwe awo, pamene kutentha kumakulirakulira, ma virucy amachepetsa. Komabe, kukopa kwa ma vinyato ake okwera komanso kutentha kwake ndikotsika kuposa kwa methyl cellulose. Njira yake imakhala yokhazikika ikasungidwa kutentha.
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. Diasc Soda ndi madzi a laimu samagwira ntchito pang'ono pa magwiridwe ake, koma alkali amatha kufulumizitsa kuchuluka kwake ndikuwonjezera pang'ono mamasukidwe. Hydroxypylropyl ndi chokhazikika pamchere wambiri, koma pamene kuchuluka kwa mchere ndi yayitali, mamasukidwe a hydroxypropyl so methylcellulose yankho limayamba kuchuluka.
. Monga mowa wa mulyvinyl, madzi owuma, masamba chingamu, etc.
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2. Hydroxyethyl cellulose
Amapangidwa kuchokera ku thonje loyeyeretsedwa ndi alkali, ndipo anachita ndi ethylene oxide ngati othandizila kukhala othandizila pamaso pa isopropanol. Mulingo wake wolowa m'malo mwake 1.5 ~ 2.0. Ili ndi hydrophilicity wamphamvu ndipo ndizosavuta kuyamwa chinyezi.
(1) Hydroxethyl cellose imasungunuka m'madzi ozizira, koma zimakhala zovuta kusungunuka m'madzi otentha. Njira yake imakhazikika kutentha kwambiri osafuula. Itha kugwiritsidwa ntchito kwa nthawi yayitali pansi pa kutentha kwambiri kumatope, koma madzi ake ndi otsika kuposa a methyl cellulose.
(2)Hydroxyethyl cellulosendi yokhazikika kwa acid acid ndi alkali, ndi alkali amatha kusamalira kuwonongeka kwake ndikuwonjezera pang'ono mamasukidwe ake. Kubalalitsa kwake m'madzi kumakulitsa pang'ono kuposa kwa methyl cellulose ndi hydroxypropyl methyl celluse.
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. Pa kutentha pafupifupi 40 ° C, helwew amatha kuchitika patatha masiku 3 mpaka 5, zomwe zingakhudze momwe akugwirira ntchito.
Post Nthawi: Apr-282024