Kodi cellulose ether imagwira ntchito yanji mumatope osakanizika owuma?

Cellulose ether ndi polima wopangidwa kuchokera ku cellulose wachilengedwe kudzera mukusintha kwamankhwala. Cellulose ether ndi chochokera ku cellulose yachilengedwe. Kupanga kwa cellulose ether ndikosiyana ndi ma polima opangira. Zinthu zake zofunika kwambiri ndi cellulose, gulu lachilengedwe la polima. Chifukwa cha mawonekedwe achilengedwe a cellulose, cellulose palokha sangathe kuchitapo kanthu ndi etherification agents. Komabe, pambuyo pochiza chotupa chotupa, zomangira zamphamvu za haidrojeni pakati pa unyolo wa maselo ndi unyolo zimawonongeka, ndipo kutulutsidwa kogwira kwa gulu la hydroxyl kumakhala cellulose yotakata. Pezani cellulose ether.

Makhalidwe a cellulose ethers amadalira mtundu, chiwerengero ndi kugawa kwa zolowa m'malo. Magulu a cellulose ethers amatengeranso mtundu wa zolowa m'malo, digiri ya etherification, solubility ndi mawonekedwe ogwiritsira ntchito. Malinga ndi mtundu wa zolowa m'malo pa unyolo wa maselo, zitha kugawidwa mu monoether ndi ether wosakanikirana. Nthawi zambiri timagwiritsa ntchito mc ngati monoether, ndi HPmc ngati ether yosakanikirana. Methyl cellulose ether mc ndi chinthu chopangidwa pambuyo pa gulu la hydroxyl pagawo la shuga la cellulose wachilengedwe litalowa m'malo ndi gulu la methoxy. Ndi chinthu chopezedwa polowa m'malo mwa gulu la hydroxyl pagawo ndi gulu la methoxy ndi gawo lina ndi gulu la hydroxypropyl. Mapangidwe ake ndi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, iyi ndi mitundu ikuluikulu yomwe imagwiritsidwa ntchito kwambiri ndikugulitsidwa pamsika.

Pankhani ya solubility, imatha kugawidwa kukhala ionic ndi non-ionic. Ma etha osungunuka m'madzi omwe si a ionic cellulose amapangidwa makamaka ndi ma alkyl ethers ndi ma hydroxyalkyl ethers. Ionic Cmc imagwiritsidwa ntchito makamaka mu zotsukira zopangira, kusindikiza nsalu ndi utoto, kufufuza zakudya ndi mafuta. Non-ionic mc, HPmc, HEmc, etc. amagwiritsidwa ntchito makamaka muzomangamanga, zokutira latex, mankhwala, mankhwala tsiku ndi tsiku, etc. Ntchito monga thickener, madzi kusunga wothandizila, stabilizer, dispersant ndi filimu kupanga wothandizira.