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 lwe-cellulose ether lukwahlulwa ngokweentlobo zezinto 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. I-MC esihlala siyisebenzisa yi-monoether, kwaye i-HPMC yi-mixed ether. I-Methyl cellulose ether MC yimveliso emva kokuba iqela le-hydroxyl kwiyunithi ye-glucose ye-natural cellulose ithathelwe indawo yi-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. Ii-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-arhente yokugcina amanzi, i-stabilizer, i-dispersant kunye ne-arhente yokwenza ifilimu.
Ukuchongwa komgangatho we-cellulose ether:
Impembelelo yomxholo we-methoxyl kumgangatho: ukugcinwa kwamanzi kunye nomsebenzi wokuqina
Impembelelo yomgangatho womxholo we-hydroxyethoxyl/hydroxypropoxyl: okukhona umxholo uphezulu, kokukhona ukugcinwa kwamanzi kungcono.
Impembelelo yomgangatho we-viscosity: okukhona inqanaba le-polymerization liphezulu, kokukhona i-viscosity iphezulu kwaye kokukhona ukugcinwa kwamanzi kungcono.
Impembelelo yomgangatho wobunono: okukhona ukusasazwa nokunyibilika kucothayo kwisamente, kokukhona ikhawuleza kwaye ifana ngakumbi, kwaye ukugcinwa kwamanzi kulungeleleneyo kungcono.
Impembelelo yomgangatho wokuhanjiswa kokukhanya: okukhona inqanaba le-polymerization liphezulu, kokukhona inqanaba le-polymerization lifana ngakumbi, kwaye ukungcola kuncinci
Impembelelo yomgangatho wobushushu bejeli: ubushushu bejeli bokwakha bumalunga nama-75°C
Impembelelo yomgangatho wamanzi: <5%, i-cellulose ether kulula ukuyifunxa umswakama, ngoko ke kufuneka ivalwe kwaye igcinwe
Impembelelo yomgangatho wothuthu: <3%, okukhona uthuthu luphezulu, kokukhona ukungcola okuninzi
Impembelelo yomgangatho wexabiso le-PH: kufutshane ne-neutral, i-cellulose ether inokusebenza okuzinzileyo phakathi kwe-PH: 2-11
Ixesha lokuthumela: Februwari-14-2023