I-Cellulose ether iyi-polymer yokwenziwa eyenziwe nge-cellulose yemvelo ngokuguqulwa kwamakhemikhali. I-Cellulose ether iyi-derivative ye-cellulose yemvelo. Ukukhiqizwa kwe-cellulose ether kuhlukile kuma-polymer okwenziwa. Izinto zayo eziyisisekelo yi-cellulose, i-polymer compound yemvelo. Ngenxa yokwakheka kwe-cellulose yemvelo, i-cellulose ngokwayo ayinawo amandla okusabela nama-etherification agents. Kodwa-ke, ngemva kokwelashwa kwe-ejenti yokuvuvukala, izibopho ezinamandla ze-hydrogen phakathi kwamaketanga e-molecule namaketanga ziyabhujiswa, futhi ukukhululwa okusebenzayo kweqembu le-hydroxyl kuba yi-reactive alkali cellulose. Thola i-cellulose ether.
Izakhiwo zama-ether e-cellulose zincike ohlotsheni, inombolo kanye nokusatshalaliswa kwezinto ezithatha indawo. Ukuhlukaniswa kwe-ether ye-cellulose kuhlukaniswa futhi ngokohlobo lwe-substituent, izinga le-etherification, ukuncibilika kanye nezakhiwo zokusetshenziswa ezihlobene. Ngokohlobo lwezinto ezithatha indawo ku-molecule chain, ingahlukaniswa ibe yi-monoether kanye ne-ether exubile. I-MC esivame ukuyisebenzisa yi-monoether, kanti i-HPMC iyi-ether exubile. I-Methyl cellulose ether MC ingumkhiqizo ngemuva kokuthi iqembu le-hydroxyl kuyunithi ye-glucose ye-cellulose yemvelo ithathelwe indawo yi-methoxy. Kungumkhiqizo otholakala ngokufaka ingxenye yeqembu le-hydroxyl kuyunithi neqembu le-methoxy kanye nenye ingxenye neqembu le-hydroxypropyl. Ifomula yesakhiwo yi-[C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x I-Hydroxyethyl methyl cellulose ether HEMC, lezi yizinhlobo eziyinhloko ezisetshenziswa kakhulu futhi ezithengiswa emakethe.
Ngokuphathelene nokuncibilika, ingahlukaniswa ibe yi-ionic kanye ne-non-ionic. Ama-ether e-cellulose angewona i-ionic ancibilika emanzini akhiwe kakhulu uchungechunge olubili lwama-ether e-alkyl kanye nama-ether e-hydroxyalkyl. I-CMC ye-Ionic isetshenziswa kakhulu ekuhlanzeni okwenziwe ngezinto zokwenziwa, ekunyatheliseni nasekudayeni izindwangu, ekuhloleni ukudla namafutha. I-MC engewona i-ionic, i-HPMC, i-HEMC, njll. isetshenziswa kakhulu ezintweni zokwakha, ezimbozweni ze-latex, emithini, kumakhemikhali ansuku zonke, njll. Isetshenziswa njenge-thickener, i-ejenti yokugcina amanzi, i-stabilizer, i-dispersant kanye ne-ejenti yokwakha ifilimu.
Ukuhlonza ikhwalithi ye-cellulose ether:
Umphumela wokuqukethwe kwe-methoxyl kukhwalithi: ukugcinwa kwamanzi kanye nomsebenzi wokuqina
Ithonya lekhwalithi lokuqukethwe kwe-hydroxyethoxyl/hydroxypropoxyl: uma okuqukethwe kuphakeme, kulapho ukugcinwa kwamanzi kuba ngcono khona.
Ithonya lekhwalithi ye-viscosity: lapho izinga le-polymerization liphakama, i-viscosity iyanda futhi ukugcinwa kwamanzi kungcono.
Ithonya lekhwalithi yobucwebe: lapho ukuhlakazeka nokuncibilika ku-mortar kuncishisiwe, kushesha futhi kuyafana, futhi ukugcinwa kwamanzi kungcono.
Umthelela wekhwalithi wokudluliselwa kokukhanya: lapho izinga le-polymerization liphakama, izinga le-polymerization liyafana kakhulu, kanye nokungcola okuncane
Umthelela wekhwalithi yokushisa kwejeli: izinga lokushisa lejeli lokwakhiwa licishe libe ngu-75°C
Ithonya lekhwalithi yamanzi: <5%, i-cellulose ether kulula ukuyimunca umswakama, ngakho-ke kufanele ivalwe futhi igcinwe
Umthelela wekhwalithi yomlotha: <3%, uma umlotha uphakeme, ukungcola okuningi
Umthelela wekhwalithi yenani le-PH: eduze nokungathathi hlangothi, i-cellulose ether inokusebenza okuzinzile phakathi kwe-PH: 2-11
Isikhathi sokuthunyelwe: Feb-14-2023