Methyl cellulose (MC) yopangidwa ndi zinthu zachilengedwe

Methyl cellulose (MC) ndi chinthu chochokera ku cellulose, chomwe ndi polima wachilengedwe womwe umapezeka m'makoma a maselo a zomera. Cellulose ndi chimodzi mwa zinthu zachilengedwe zomwe zimapezeka kwambiri padziko lapansi, makamaka kuchokera ku ulusi wa matabwa ndi thonje. MC imapangidwa kuchokera ku cellulose kudzera muzochita zosiyanasiyana zomwe zimaphatikizapo kusintha magulu a hydroxyl (-OH) mu molekyulu ya cellulose ndi magulu a methyl (-CH3).

Ngakhale kuti MC yokha ndi mankhwala osinthidwa ndi mankhwala, zinthu zake zopangira, cellulose, zimachokera ku zinthu zachilengedwe. Cellulose imatha kuchotsedwa ku zinthu zosiyanasiyana za zomera, kuphatikizapo matabwa, thonje, hemp, ndi zomera zina zokhala ndi ulusi. Cellulose imakonzedwa kuti ichotse zonyansa ndikuzisandutsa kukhala mawonekedwe ogwiritsidwa ntchito popanga MC.

Maselo a cellulose akapezeka, amapangidwa ndi etherification kuti alowetse magulu a methyl pamsana wa cellulose, zomwe zimapangitsa kuti methyl cellulose ipangidwe. Njira imeneyi imaphatikizapo kuchiza cellulose ndi chisakanizo cha sodium hydroxide ndi methyl chloride pansi pa malamulo okhwima.

Methyl cellulose yomwe imachokera ndi ufa woyera mpaka woyera, wopanda fungo, komanso wopanda kukoma womwe umasungunuka m'madzi ozizira ndipo umapanga yankho lokhuthala. Umagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo chakudya, mankhwala, chisamaliro chaumwini, ndi zomangamanga, chifukwa cha kukhuthala kwake, kukhazikika, komanso kupanga filimu.

Ngakhale kuti MC ndi mankhwala osinthidwa ndi mankhwala, imachokera ku cellulose yachilengedwe, zomwe zimapangitsa kuti ikhale njira yowola komanso yosamalira chilengedwe yomwe imagwiritsidwa ntchito nthawi zambiri.