Cellulose ether bụ polymer sịntetik nke sitere na cellulose eke sitere na mgbanwe kemịkalụ. Cellulose ether bụ ihe sitere na cellulose eke. Ihe mmepụta nke cellulose ether dị iche na polymers sịntetik. Ihe kachasị mkpa ya bụ cellulose, ngwakọta polymer eke. N'ihi ihe dị iche iche nke usoro cellulose eke, cellulose n'onwe ya enweghị ike imeghachi omume na ndị ọrụ etherification. Otú ọ dị, mgbe ọgwụgwọ nke onye na-amụba ihe, a na-ebibi njikọ siri ike hydrogen n'etiti ụdọ molecular na agbụ, na ntọhapụ na-arụ ọrụ nke hydroxyl otu na-aghọ cellulose alkali na-emeghachi omume. Nweta cellulose ether.
Njirimara nke cellulose ethers na-adabere n'ụdị, ọnụ ọgụgụ na nkesa nke ndị nọchiri anya ya. Nkewa nke cellulose ethers na-adaberekwa n'ụdị ihe ngbanwe, ogo nke etherification, solubility na ngwa ngwa metụtara ya. Dị ka ụdị ihe ndị na-anọchi anya na eriri molecular, enwere ike kewaa ya na monoether na ngwakọta ether. Anyị na-ejikarị mc dị ka monoether, yana HPmc dị ka ether agwakọta. Methyl cellulose ether mc bụ ngwaahịa a na-emepụta mgbe otu hydroxyl nọ na nkeji glucose nke cellulose eke site na methoxy Group dochie ya. Ọ bụ ngwaahịa enwetara site na iji otu methoxy dochie akụkụ nke hydroxypropyl na otu akụkụ nke otu hydroxypropyl. Usoro nhazi bụ [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, ndị a bụ ụdị ndị a na-ejikarị na-ere n'ahịa.
N'ihe gbasara solubility, enwere ike kewaa ya na ionic na ndị na-abụghị ionic. Mmiri-soluble na-abụghị ionic cellulose ethers bụ tumadi mejupụtara abụọ usoro nke alkyl ethers na hydroxyalkyl ethers. A na-ejikarị Ionic Cmc eme ihe n'ihe ndị sịntetịt, mbipụta textile na akwa, nchọpụta nri na mmanụ. Ndị na-abụghị ionic mc, HPmc, HEmc, wdg na-ejikarị eme ihe na ihe owuwu, mkpuchi latex, ọgwụ, kemịkalụ kwa ụbọchị, wdg A na-eji dị ka thickener, onye na-ejigide mmiri, stabilizer, dispersant na film forming agent.
Oge nzipu: Nov-24-2022