Cellulose Ether

Cellulose etherAmapangidwa kuchokera ku cellulose kudzera mu etherification reaction ya etherification imodzi kapena zingapo komanso dry grinding. Malinga ndi kapangidwe ka mankhwala osiyanasiyana a ether substituents, cellulose ethers amatha kugawidwa m'magulu a anionic, cationic ndi nonionic ethers. Ionic cellulose ethers makamaka imaphatikizapocarboxymethyl cellulose ether (CMC)ma ether a cellulose osakhala a ionic makamaka amaphatikizapoether ya methyl cellulose (MC),hydroxypropyl methyl cellulose ether (HPMC)ndi hydroxyethyl cellulose ether.Chlorine ether (HC)ndi zina zotero. Ma ether osakhala a ionic amagawidwa m'magulu a ma ether osungunuka m'madzi ndi ma ether osungunuka ndi mafuta, ndipo ma ether osungunuka ndi madzi osakhala a ionic amagwiritsidwa ntchito kwambiri mu zinthu za matope. Pakakhala ma calcium ions, ionic cellulose ether ndi yosakhazikika, kotero siigwiritsidwa ntchito kawirikawiri mu zinthu za matope osakanikirana ndi madzi zomwe zimagwiritsa ntchito simenti, laimu wosweka, ndi zina zotero ngati zinthu zomangira simenti. Ma ether osungunuka ndi madzi osakhala a ionic amagwiritsidwa ntchito kwambiri mumakampani opanga zida zomangira chifukwa cha kukhazikika kwawo komanso kusunga madzi.

Katundu wa Mankhwala a Cellulose Ether

Etha iliyonse ya cellulose ili ndi kapangidwe koyambira ka cellulose — kapangidwe ka Anhydroglucose. Pakupanga etha ya cellulose, ulusi wa cellulose umatenthedwa kaye mu yankho la alkaline, kenako umachiritsidwa ndi mankhwala ophera. Chogulitsa cha fibrous reaction chimayeretsedwa ndikuphwanyidwa kuti chipange ufa wofanana wokhala ndi kupyapyala kwina.

Pakupanga MC, methyl chloride yokha ndi yomwe imagwiritsidwa ntchito ngati etherification agent; kuwonjezera pa methyl chloride, propylene oxide imagwiritsidwanso ntchito kupeza magulu olowa m'malo mwa hydroxypropyl popanga HPMC. Ma cellulose ether osiyanasiyana ali ndi ma methyl ndi hydroxypropyl substitution ratios osiyanasiyana, zomwe zimakhudza organic compatibility ndi kutentha kwa kutentha kwa ma cellulose ether solutions.