I-cellulose ether ingathuthukisa kakhulu ukusebenza kodaka olumanzi, futhi iyisengezo esiyinhloko esithinta ukusebenza kokwakhiwa kodaka. Ukukhethwa okunengqondo kwama-cellulose ethers ezinhlobonhlobo ezahlukene, ama-viscosity ahlukene, ubukhulu bezinhlayiya ezihlukahlukene, amazinga ahlukene e-viscosity namanani angeziwe azoba nomthelela omuhle ekuthuthukiseni ukusebenza kwe-powder mortar.
Kuphinde kube nobudlelwano obuhle bomugqa phakathi kokuvumelana kokunamathisela usimende kanye nomthamo we-cellulose ether. I-cellulose ether ingakhuphula kakhulu i-viscosity yodaka. Uma umthamo umkhulu, umphumela uba sobala kakhulu. Isixazululo se-aqueous cellulose cellulose ether esine-high-viscosity sine-thixotropy ephezulu, ephinde ibe yisici esikhulu se-cellulose ether.
Umphumela wokuqina uncike ezingeni le-polymerization ye-cellulose ether, ukuhlushwa kwesisombululo, izinga le-shear, izinga lokushisa nezinye izimo. Impahla ye-gelling yesixazululo ihlukile ku-alkyl cellulose kanye nokuphuma kwayo okuguquliwe. Izakhiwo ze-gelation zihlobene nezinga lokushintshwa, ukugxila kwesisombululo kanye nezithasiselo. Kokuphuma kokunye okuguquliwe kwe-hydroxyalkyl, izakhiwo zejeli nazo zihlobene nezinga lokuguqulwa le-hydroxyalkyl. Isixazululo esingu-10% -15% singalungiselelwa i-MC ne-HPMC ene-viscosity ephansi, isixazululo esingu-5% -10% singalungiselelwa i-medium-viscosity MC ne-HPMC, kanti isisombululo esingu-2% -3% singalungiselelwa kuphela i-MC ye-viscosity ephezulu. kanye ne-HPMC. Ngokuvamile ukuhlukaniswa kwe-viscosity ye-cellulose ether nakho kuhlelwe ngesisombululo esingu-1% -2%.
I-high-molecular-weight cellulose ether inokuqina okuphezulu kokusebenza kahle. Ama-polymers anesisindo samangqamuzana ahlukene ane-viscosity ehlukene kusixazululo esifanayo sokuhlushwa. Izinga eliphezulu. I-viscosity ehlosiwe ingafinyelelwa kuphela ngokungeza inani elikhulu lesisindo esiphansi se-cellulose ether. I-viscosity yayo inokwencika okuncane kuzinga lokugunda, futhi i-viscosity ephezulu ifinyelela i-viscosity ehlosiwe, futhi inani elidingekayo lokwengeza lincane, futhi i-viscosity incike ekusebenzeni kahle kokuqina. Ngakho-ke, ukuze kuzuzwe ukuvumelana okuthile, inani elithile le-cellulose ether (ukugxila kwesisombululo) kanye ne-viscosity yesisombululo kufanele kuqinisekiswe. Izinga lokushisa lejeli lesisombululo liphinde linciphise ngokuhambisana nokwanda kokuhlushwa kwesisombululo, nama-gel ekamelweni lokushisa ngemva kokufinyelela ekugxilweni okuthile. I-concentration ye-gelling ye-HPMC iphezulu uma kuqhathaniswa nezinga lokushisa legumbi.
Isikhathi sokuthumela: Mar-08-2023