Mc ndi methyl cellulose, yomwe imapangidwa ndi cellulose pochiza thonje loyenerera ndi alkali, kugwiritsa ntchito meloride chloride ngati njira yokonza, ndikutsatira zochitika zingapo. Nthawi zambiri, kuchuluka kwa zolowa ndi 1.6 ~ 2.0, ndipo solubility ndizosiyananso ndi madigiri osiyanasiyana. Ndi ya ether ether ether ether.
. Nthawi zambiri, ngati kuchuluka kwake ndi kwakukulu, kukoma mtima ndikochepa, ndipo ma virus ndi akulu, osunga madzi ndi okwera. Pakati pawo, kuchuluka kwa kuwonjezera komwe kumapangitsa kuti pakhale madzi osunga madzi, ndipo kuchuluka kwa ma virus sikuphatikizidwa mwachindunji pamlingo wamadzi osamala yamadzi. Chiwerengero chophweka chimatengera kuchuluka kwa kuchuluka kwa ma cellulose tinthu tating'onoting'ono. Pakati pa cellulose yomwe ili pamwambapa, methyl cellulose ndi hydroxypropyl meth celyl cellulose imakhala ndi mitengo yapamwamba yamadzi.
(2) Methylcellulose imasungunuka m'madzi ozizira, ndipo zimakhala zovuta kusungunuka m'madzi otentha. Njira yake yothetsera matenda imakhala yokhazikika mu pro = 3 ~ 12. Imakhala ndi kulumikizana bwino ndi wowuma, Guar Gum, etc. ndi ambiri okonda. Kutentha kukafika kwa kutentha kwa kutentha, gelation kumachitika.
(3) Kusintha kwa kutentha kumakhudza kwambiri malo osungitsa madzi a methyl cellulose. Nthawi zambiri, kutentha kwambiri, kumadzaza madzi. Ngati kutentha kwa matope kupitirira 40 ° C, kusunga madzi a methyl cellulose idzachepetsa kwambiri, kukhudzana ndi kapangidwe ka matope.
(4) Methyl cellulose imakhudzanso ntchito yomanga ndi kutsatira matope. "Zomatira" apa zikutanthauza mphamvu yotsatsira yomwe ikukhudzidwa pakati pa chida cha wogwira ntchito ndi khomalo, ndiye kuti, kung'amba matope. Kumatira ndikokwera, kukana matope ndi kwakukulu, ndipo mphamvu zofunidwa ndi ogwira ntchito pakugwiritsa ntchito nthawi zambiri zimagwiritsidwanso ntchito ndizochulukirapo, ndipo zomangamanga za matope ndi osauka. Methyl cellulose yotsatira ndi pamlingo woyenera mu cellulose ether ether.
HPMC ndi hydroxypypyl methylcellulose, yomwe ndi cellulose yopanda inic yosakaniza ndi thonje loyeretsedwa, pogwiritsa ntchito a meloriziza oxide ndi methyl chloride ngati zomwe zingachitike. Mulingo wazolowa m'malo mwake 1.2 ~ 2.0. Katundu wake ndi wosiyana chifukwa cha ma ratios osiyanasiyana a methoxyl zomwe zili ndi hydroxypropyl.
(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.
. Kutentha kumakhudzanso mamasukidwe awo, pamene kutentha kumakulirakulira, ma virucy amachepetsa. Komabe, mawonekedwe ake okwera amakhala ndi kutentha kochepa kuposa celyyl cellulose. Njira yake imakhala yokhazikika ikasungidwa kutentha.
. Diasc Soda ndi madzi a laimu samalimbikitsa pang'ono pa ntchito yake, koma alkali amatha kufulumizitsa kufalikira kwake ndikuwonjezera mawonekedwe ake. Hydroxypylropyl ndi chokhazikika pamchere wambiri, koma pamene kuchuluka kwa mchere ndi yayitali, mamasukidwe a hydroxypropyl so methylcellulose yankho limayamba kuchuluka.
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. Monga mowa wa mulyvinyl, madzi owuma, masamba chingamu, etc.
(6) Kutsatira kwa hydroxypropyl meth.
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Post Nthawi: Apr-17-2023