Cellulose ether yog cov khoom siv hluavtaws tau los ntawm cov xov tooj ntawm lub ntsej muag los ntawm kev hloov kho tshuaj lom neeg. Cellulose ether yog ib qho tseem ceeb ntawm cov cellulose ntuj. Kev tsim cov cellulose ether yog qhov sib txawv los ntawm cov hluavtaws polymers. Nws cov khoom siv tshaj plaws yog cellulose, lub ntuj polymer compound. Vim muaj tshwj xeeb ntawm lub ntuj cellulose qauv, lub cellulose nws tus kheej tsis muaj peev xwm ua kom muaj peev xwm tawm tsam nrog etherification tus sawv cev. Txawm li cas los xij, tom qab kev kho mob ntawm ofing tus neeg sawv cev, cov saw hlau muaj zog los ntawm cov pawg molecular thiab cov koom tes nquag tso tawm, thiab cov pab pawg ua kom nquag plias ntawm cov pab pawg hydroxyl dhau los ua cov alkali cellulose. Muab cov cellulose ether.
Cov yam ntxwv ntawm Cellulose cov neeg muaj kev pab yog nyob ntawm hom, tus lej thiab xa tawm ntawm cov neeg hloov chaw. Kev faib khoom ntawm cov cellulose cov neeg muaj cai kuj yog raws li cov hloov chaw, qib ntawm etherification, solubility thiab suav hais tias cov khoom thov siv tau. Raws li hom kev hloov chaw ntawm cov molecular, nws tuaj yeem faib ua monoet thiab sib xyaw ether. Peb feem ntau siv mc ua monoether, thiab HPMC raws li sib xyaw ether. Methyl Cellulose ether mc yog cov khoom tom qab cov pab pawg hydroxyl ntawm chav dej qab zib ntawm cov methoxy pab pawg. Nws yog cov khoom tau los ntawm kev hloov chaw ib feem ntawm cov pab pawg hydroxyl ntawm chav ntsuas nrog pawg methoxy thiab lwm feem nrog cov pab pawg hydroxyprropyl. Cov qauv txheej txheem yog [C6h7o2 (Oh) 3-MN (OCH3) M [OCH2CH (OH) METC, cov no yog cov ntau ntau dav siv thiab muag hauv khw.
Hais txog solubility, nws tuaj yeem faib ua ionic thiab tsis yog ionic. Dej-soluble tsis yog-ionic cellulose cov neeg muaj cai yog tsuas yog suav nrog ob sab ntawm Alkyl uas muaj cov neeg txawj ntse thiab Hydroxyalkyl cov neeg txawj ntse. Ionic CMC feem ntau yog siv nyob rau hauv cov khoom siv hluavtaws, textile luam ntawv thiab tawg thiab roj roj. Tsis yog-ionic mc, HPMC, Hemm, thiab lwm yam, siv tshuaj, dej txhua hnub, stabilizer, dispersant thiab ua yeeb yam disping tus neeg sawv cev.
Lub Sijhawm Post: Nov-24-2022