Cellulose ether

Cellulose etherA na-eme ya site na cellulose site na mmeghachi omume etherification nke otu ma ọ bụ ọtụtụ etherification na-egweri. Dị ka usoro kemịkalụ dị iche iche nke ether nọchiri anya, ethers cellulose nwere ike kewaa n'ime anionic, cationic na nonionic ethers. Ionic cellulose ethers gụnyerecarboxymethyl cellulose ether (CMC); Ethers cellulose na-abụghị ionic gụnyeremethyl cellulose ether (MC),hydroxypropyl methyl cellulose ether (HPMC)na hydroxyethyl cellulose ether.Chlorine ether (HC)were gabazie. A na-ekewa ethers na-abụghị ionic n'ime ethers nke mmiri na-agbaze na mmanụ na-edozi mmanụ, na ethers na-abụghị nke ionic na-ejikarị eme ihe na ngwa ngwa. N'ebe ọnụnọ nke calcium ion, ionic cellulose ether adịghị eguzosi ike, n'ihi ya, a na-ejikarị ya eme ihe na ngwa ngwa agwakọta akọrọ nke na-eji ciment, lime slaked, wdg dị ka ihe simenti. Nonionic mmiri-soluble cellulose ethers na-eji ọtụtụ ebe na ụlọ ọrụ ụlọ ọrụ n'ihi na ha nkwusioru nkwụsi ike na njide mmiri.

Njirimara Chemical nke Cellulose Ether

Eter cellulose nke ọ bụla nwere ntọala bụ isi nke cellulose - usoro anhydroglucose. N'ime usoro nke ịmepụta cellulose ether, a na-ebu ụzọ kpoo eriri cellulose na ngwọta alkaline, wee mesoo ya na onye na-emepụta ihe. A na-asachapụ ngwaahịa mmeghachi omume fibrous ma kporie ya ka ọ bụrụ ntụ ntụ nke nwere ezigbo mma.

N'ime usoro mmepụta nke MC, naanị methyl chloride na-eji dị ka onye na-ahụ maka etherification; na mgbakwunye na methyl chloride, a na-ejikwa propylene oxide nweta otu ndị nnọchi anya hydroxypropyl na mmepụta nke HPMC. Dị iche iche cellulose ethers nwere dị iche iche methyl na hydroxypropyl nnọchi ratios, nke na-emetụta organic ndakọrịta na thermal gelation okpomọkụ nke cellulose ether ngwọta.