Cellulose ether i polymer yakagadzirwa kubva kune yakasikwa cellulose kuburikidza nekugadzirisa kemikari. Cellulose ether inobva kune yakasikwa cellulose. Kugadzirwa kwe cellulose ether kwakasiyana nemapolymer ekugadzira. Yayo inonyanya kukosha ndeye cellulose, yakasikwa polymer musanganiswa. Nekuda kwekusarudzika kwechisikigo cellulose chimiro, iyo cellulose pachayo haina kugona kuita ne etherification agents. Zvisinei, mushure mekurapwa kwechirwere chekuzvimba, zvisungo zvakasimba zvehydrogen pakati pemaketani emaketani nemaketani zvinoparadzwa, uye kusunungurwa kunoshingaira kweboka rehydroxyl kunova reactive alkali cellulose. Wana cellulose ether.
Zvinhu zve cellulose ethers zvinoenderana nerudzi, nhamba uye kugovera kwezvinotsiva. Kurongeka kwe cellulose ethers zvakare kwakavakirwa pamhando yezvinotsiva, dhigirii reetherification, solubility uye zvine chekuita nekushandisa zvivakwa. Zvinoenderana nerudzi rwezvinotsiva pane molecular cheni, inogona kukamurwa kuita monoether uye yakasanganiswa ether. Isu tinowanzo shandisa mc se monoether, uye HPmc seyakasanganiswa ether. Methyl cellulose ether mc ndicho chigadzirwa mushure meboka rehydroxyl riri paglucose unit ye natural cellulose inotsiviwa neboka remethoxy. Icho chigadzirwa chinowanikwa nekutsiva chikamu cheboka rehydroxyl payuniti neboka remethoxy uye chimwe chikamu neboka rehydroxypropyl. Iyo yemaitiro formula ndeye [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, aya ndiwo makuru emhando anoshandiswa zvakanyanya uye anotengeswa pamusika.
Panyaya yekunyungudika, inogona kukamurwa kuita ionic uye isiri-ionic. Mvura inonyungudika isiri-ionic cellulose ethers inonyanya kuumbwa maviri akatevedzana ealkyl ethers uye hydroxyalkyl ethers. Ionic Cmc inonyanya kushandiswa mukugadzira detergents, machira kudhinda uye dhayi, chikafu uye kuongorora mafuta. Non-ionic mc, HPmc, HEmc, nezvimwewo zvinonyanya kushandiswa mukuvaka zvinhu, latex coatings, mishonga, makemikari ezuva nezuva, etc. Inoshandiswa seyakasviba, mvura inochengetedza mumiriri, stabilizer, dispersant uye firimu kugadzira agent.
Nguva yekutumira: Nov-24-2022