I-Cellulose ether yi-polymer eyenziweyo eyenziwe nge-cellulose yendalo ngokuguqulwa kweekhemikhali. I-Cellulose ether yi-derivative ye-cellulose yendalo. Ukuveliswa kwe-cellulose ether kwahlukile kwii-polymers zokwenziwa. Izinto zayo ezisisiseko yi-cellulose, i-compound yendalo ye-polymer. Ngenxa yobuchule besakhiwo se-cellulose yendalo, i-cellulose ngokwayo ayinakho ukusabela kunye nee-agents ze-etherification. Nangona kunjalo, emva konyango lwe-agent yokudumba, ii-hydrogen bonds ezinamandla phakathi kwee-chain ze-molecular kunye nee-chain ziyatshatyalaliswa, kwaye ukukhululwa okusebenzayo kweqela le-hydroxyl kuba yi-reactive alkali cellulose. Fumana i-cellulose ether.
Iipropati zee-cellulose ethers zixhomekeke kuhlobo, inani kunye nokusasazwa kwezinto ezithatha indawo. Uhlu lwee-cellulose ethers lukwasekelwe kuhlobo lwezinto ezithatha indawo, inqanaba le-etherification, ukunyibilika kunye neepropati zokusetyenziswa ezinxulumene noko. Ngokweentlobo zezinto ezithatha indawo kwi-molecular chain, inokwahlulwa ibe yi-monoether kunye ne-mixed ether. Sidla ngokusebenzisa i-mc njenge-monoether, kwaye i-HPmc njenge-mixed ether. I-Methyl cellulose ether mc yimveliso emva kokuba iqela le-hydroxyl kwiyunithi ye-glucose ye-natural cellulose ithathelwe indawo liqela le-methoxy. Yimveliso efunyenwe ngokufaka inxalenye yeqela le-hydroxyl kwiyunithi ngeqela le-methoxy kunye nenye inxalenye eneqela le-hydroxypropyl. Ifomyula yolwakhiwo yi-[C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x I-Hydroxyethyl methyl cellulose ether HEmc, ezi zezona ntlobo ziphambili ezisetyenziswa kakhulu kwaye zithengiswa kwimarike.
Ngokuphathelele ukunyibilika, inokwahlulwa ibe yi-ionic kunye ne-non-ionic. Ii-ether ze-cellulose ezinyibilikayo emanzini ezingengo-ionic zenziwe ikakhulu ngothotho lwe-alkyl ethers kunye nee-hydroxyalkyl ethers. I-Ionic Cmc isetyenziswa kakhulu kwiisepha zokwenziwa, ukuprinta kunye nokudaya ilaphu, uphando lokutya kunye neoyile. I-Non-ionic mc, i-HPmc, i-HEmc, njl.njl. zisetyenziswa kakhulu kwizixhobo zokwakha, kwiingubo ze-latex, kumayeza, kwiikhemikhali zemihla ngemihla, njl.njl. Zisetyenziswa njenge-thickener, i-agent yokugcina amanzi, i-stabilizer, i-dispersant kunye ne-agent yokwenza ifilimu.
Ixesha lokuthumela: Novemba-24-2022