I-Cellulose ether yipolymer yokwenziwa eyenziwe kwi-cellulose yendalo ngokuguqulwa kweekhemikhali. I-ether ye-cellulose iphuma kwi-cellulose yendalo. Ukuveliswa kwe-cellulose ether kuyahluka kwiipolymers zokwenziwa. Izinto zayo ezisisiseko ziyi-cellulose, i-polymer compound yendalo. Ngenxa yobungcali besakhiwo se-cellulose yendalo, i-cellulose ngokwayo ayinakho ukusabela kunye nee-etherification agents. Nangona kunjalo, emva kokunyangwa kwe-ejenti yokuvuvukala, iibhondi ze-hydrogen ezomeleleyo phakathi kwamatyathanga e-molecular kunye namatyathanga atshatyalaliswa, kwaye ukukhutshwa okusebenzayo kweqela le-hydroxyl kuba yi-alkali cellulose esebenzayo. Fumana i-cellulose ether.
Iimpawu ze-cellulose ethers zixhomekeke kuhlobo, inani kunye nokuhanjiswa kwezinto ezithatha indawo. Ulwahlulo lwe-cellulose ethers lukwasekelwe kuhlobo lwabaxumi, i-degree of etherification, i-solubility kunye neepropati ezinxulumene nesicelo. Ngokohlobo lwababambeleyo kwitsheyini yemolekyuli, inokwahlulwa ibe yi-monoether kunye ne-ether edibeneyo. Sidla ngokusebenzisa i-mc njenge-monoether, kunye ne-HPmc njenge-ether exutywe. I-Methyl cellulose ether mc yimveliso emva kweqela le-hydroxyl kwiyunithi ye-glucose ye-cellulose yendalo ifakwe endaweni yeqela le-methoxy. Yimveliso efunyenwe ngokutshintsha inxalenye yeqela le-hydroxyl kwiyunithi kunye neqela le-methoxy kunye nenye inxalenye kunye neqela le-hydroxypropyl. Ifomula yolwakhiwo ithi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, ezi zezona ntlobo zisetyenziswa kakhulu kwaye zithengiswa kwimarike.
Ngokubhekiselele kwi-solubility, inokwahlulwa ibe yi-ionic kunye ne-non-ionic. Ii-ether ze-cellulose ezingenayo i-ionic ezinyibilikayo zamanzi zenziwa ikakhulu ngamacandelo amabini e-alkyl ethers kunye ne-hydroxyalkyl ethers. I-Ionic Cmc isetyenziswa ikakhulu kwizicoci zokwenziwa, ukuprintwa kwelaphu kunye nokudaya, ukutya kunye nokuhlola ioli. I-non-ionic mc, i-HPmc, i-HEmc, njl. zisetyenziswa kakhulu kwizinto zokwakha, iingubo ze-latex, amayeza, iikhemikhali zemihla ngemihla, njl njl. Isetyenziswe njenge-thickener, i-agent yokugcina amanzi, i-stabilizer, i-dispersant kunye ne-agent yokwenza ifilimu.
Ixesha lokuposa: Nov-24-2022