I-Hydroxypropylmethylrubicin (HPMC) iyimpahla ye-cellulosic, i-pulp noma ukotini engasetshenziswa ukucwenga i-pulp yezinkuni. Ngaphambi kwe-alkalization noma inqubo ye-alkalization kufanele ibhujiswe. Ukulimala komshini kungase kucekele phansi isakhiwo esihlanganisiwe sephepha le-cellulose impahla, ngaleyo ndlela kunciphise i-polymerization kanye ne-crystallinity, okwandisa indawo yayo ethile, ngaleyo ndlela kwandise i-matrix ingaba i-macromolecular ternary ne-cellulose.
IHydroxymethylcellulose isetshenziswa njenge-substrate ekukhiqizeni uwoyela. Imodeli yokusetshenziswa ingaqedela ukusetshenziswa kukashukela, ithuthukise izinga lokusetshenziswa kwezinto, inciphise insalela ye-substrate oketshezini oluvutshelwayo, futhi yehlise izindleko zokuhlanza amanzi alahlwayo. Izici zengxube zihambisana nokwenza kahle kwe-batch, i-fed-batch kanye nezinqubo zokuvutshelwa okuqhubekayo, ukugwema ukuxhashazwa kwezingxenye eziphakathi nendawo kanye namazinga okunciphisa, futhi kusiza ukulungiswa kwezinqubo zokuvutshelwa. Njengoba i-HPMC inomsebenzi ofanayo njengamanye ama-ether ancibilikayo emanzini, ingasetshenziswa njenge-ejenti eyenza ifilimu, i-thickener, emulsifier ne-stabilizer kupende we-latex nopende we-resin oncibilika emanzini, omelana kahle kakhulu nokugqokwa, ukunamathela okufanayo kanye nokunamathela. ukuthuthukisa ukushuba kwesimo sezulu, ukuzinza kwe-acid-base kanye nokuhambisana nombala we-metallic.
Ukwakhiwa kwe-hydroxypropylmethylcellulose (HPMC) kuphazamisekile, kodwa ngokomthetho, kodwa ukulahlekelwa kwe-substrate, isisekelo..etherification, ukuqedwa
Ukuthola kabusha i-ejenti ngokufaka i-centrifugation, ukuwasha, ukomiswa kanye nokuthinta indawo ngayinye kucebile ngamakhono nolwazi oluyisisekelo.
Izisetshenziswa ezisizayo nezilawuli zewashi zizosiza ukuqinisekisa ikhwalithi yomkhiqizo kanye nesistimu yokukhiqiza ethembekile. Ithinta inani lamanzi kudaka lwe-hypromellose dry-mix mortar egcina amanzi i-hydroxypropyl methylcellulose ether mortar ukuze kuthuthukiswe ukugeleza kwamanzi okuqhubekayo kukasimende, udaka ne-substrate ukwandisa isikhathi sokunamathela.
Kunomphumela oyinhloko wokugcinwa kwamanzi, ukugcinwa kwamanzi, ukugcinwa komswakama yi-putty powder, ukunamathela kanye nemisebenzi yokugcoba. Isetshenziswa kabanzi embonini yezokwakha, imboni kapende nezinye izimboni eziningi, i-hydroxypropyl methylcellulose ibalulekileukukhiqizwa kwe-hydroxypropyl methylcellulose. Izinga lokushisa elishisayo le-gelation liphezulu kakhulu kunele-methylcellulose. I-lime ne-soda zinethonya elincane ekusebenzeni, kodwa zingasheshisa ukuqedwa kwe-matrix futhi kwandise i-viscosity. Lapho i-polyvinyl alcohol, isitashi ether, inhlaka yemifino kanye nopende we-hydroxypropyl methylcellulose, njll., isisombululo sesitoko sesakhiwo esingenhla. Uma usebenzisa udaka, i-gypsum, i-putty powder noma ezinye izinto njenge-adhesive, ingathuthukisa ukusebenza futhi yandise isikhathi sokusebenza. Ingasetshenziselwa umhlobiso, unamathisele amathayili, imabula, ipulasitiki futhi unciphise ukusetshenziswa kwesiqu samanga sikasimende. I-slurry egcina amanzi ngemva kokumiswa ngeke iqhekeke ngokushesha, futhi amandla ngemva kokuphulukiswa aba ngcono.
Isikhathi sokuthumela: Dec-20-2022