Kodi ether ya cellulose imagwira ntchito yotani mu matope osakanikirana ndi madzi?

Cellulose ether ndi polima yopangidwa kuchokera ku cellulose yachilengedwe kudzera mu kusintha kwa mankhwala. Cellulose ether ndi yochokera ku cellulose yachilengedwe. Kupanga kwa cellulose ether ndi kosiyana ndi ma polima opangidwa. Zinthu zake zofunika kwambiri ndi cellulose, chinthu chachilengedwe cha polymer. Chifukwa cha kapangidwe ka cellulose yachilengedwe, cellulose yokha ilibe mphamvu yochitapo kanthu ndi zinthu zoyeretsera. Komabe, pambuyo pochiza chotupa, ma hydrogen amphamvu pakati pa unyolo wa mamolekyu ndi unyolo amawonongeka, ndipo kutulutsidwa kwa hydroxyl kumayamba kukhala reactive alkali cellulose. Pezani cellulose ether.

Katundu wa ma ether a cellulose amadalira mtundu, chiwerengero ndi kufalikira kwa ma ether. Kugawidwa kwa ma ether a cellulose kumadaliranso mtundu wa ma ether, kuchuluka kwa ether, kusungunuka ndi mawonekedwe ofanana ndi omwe amagwiritsidwa ntchito. Malinga ndi mtundu wa ma ether omwe ali pa unyolo wa molekyulu, amatha kugawidwa m'magulu awiri: monoether ndi mixed ether. Nthawi zambiri timagwiritsa ntchito mc ngati monoether, ndipo HPmc ngati mixed ether. Methyl cellulose ether mc ndi chinthu chomwe chimachitika pambuyo poti gulu la hydroxyl pa unit ya glucose ya natural cellulose limalowetsedwa m'malo ndi gulu la methoxy. Ndi chinthu chomwe chimapezeka posintha gawo la gulu la hydroxyl pa unit ndi gulu la methoxy ndi gawo lina ndi gulu la hydroxypropyl. Fomula yomangira ndi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethylmethyl cellulose ether HEmc, awa ndi mitundu yayikulu yomwe imagwiritsidwa ntchito kwambiri komanso yogulitsidwa pamsika.

Ponena za kusungunuka, ikhoza kugawidwa m'magulu a ionic ndi non-ionic. Ma ether a cellulose osungunuka m'madzi amapangidwa makamaka ndi ma ether awiri a alkyl ndi ma ether a hydroxyalkyl. Ionic Cmc imagwiritsidwa ntchito kwambiri mu sopo wopangira, kusindikiza ndi kupaka utoto nsalu, kufufuza chakudya ndi mafuta. Non-ionic mc, HPmc, HEmc, ndi zina zotero zimagwiritsidwa ntchito kwambiri mu zipangizo zomangira, zokutira za latex, mankhwala, mankhwala a tsiku ndi tsiku, ndi zina zotero. Amagwiritsidwa ntchito ngati chokhuthala, chosungira madzi, chokhazikika, chosungunula ndi chopangira filimu.