Cellulose Ether

Eter cellulosewaxaa laga sameeyaa cellulose iyada oo loo marayo falcelinta etherification ee hal ama dhowr walxo etherification iyo shiidi qallalan. Marka loo eego qaababka kala duwan ee kiimikooyinka beddelka ether-ka, ether-ka cellulose waxaa loo qaybin karaa anionic, cationic iyo ethers nonionic. Ionic cellulose ethers inta badan waxaa ka mid ahCarboxymethyl cellulose ether (CMC); Ether-yada cellulose-ka aan-ionic ahayn inta badan waxaa ka mid ahmethyl cellulose ether (MC),Hydroxypropyl methyl cellulose ether (HPMC)iyo hydroxyethyl cellulose ether.Chlorine ether (HC)iyo wixi la mida. Ethers-ka aan-ionic-ka ahayn waxa loo qaybiyaa ether-biyood-ku-milmi kara iyo ether-ka-saliid-milmi kara, iyo ether-ka aan-ionic-ka ahayn ee biyaha-milmi kara waxa inta badan loo isticmaalaa alaabta hoobiye. Marka ay joogaan ions calcium, ionic cellulose ether waa mid aan degganeyn, sidaas darteed marar dhif ah ayaa loo isticmaalaa alaabada hoobiyaha ee qallalan ee qallalan ee isticmaala sibidhka, lime la jarjaray, iwm. sida alaabta sibidhka. Ether-yada cellulose-ka ee biyaha-milmi-la'aanta ah ayaa si weyn loogu isticmaalaa warshadaha qalabka dhismaha sababtoo ah xasilloonidooda hakinta iyo haynta biyaha.

Sifooyinka Kiimikada ee Cellulose Eter

Eter kasta oo cellulose ah wuxuu leeyahay qaab-dhismeedka aasaasiga ah ee cellulose-qaab dhismeedka anhydroglucose. Habka soo saarista ether cellulose, fiber cellulose ayaa marka hore lagu kululeeyaa xalalka alkaline, ka dibna lagu daaweeyaa wakiilka etherifying. Alaabada falcelinta fayruuska ah waa la nadiifiyaa oo la miiray si loo sameeyo budo labis ah oo leh xoogaa gaar ah.

Habka wax soo saarka ee MC, kaliya methyl chloride ayaa loo isticmaalaa sida wakiilka etherification; Marka lagu daro chloride methyl, propylene oxide ayaa sidoo kale loo isticmaalaa si loo helo kooxaha beddelka hydroxypropyl ee wax soo saarka HPMC. Ethers cellulose kala duwan waxay leeyihiin methyl iyo hydroxypropyl kala duwan ee saamiga beddelka, taas oo saameynaysa waafaqid organic iyo heerkulka gelation kulaylka ee xalal ether cellulose.