IHydroxyethyl cellulose (HEC) iyi-fibrous emhlophe noma ekhanyayo, engenaphunga, eqinile engenabuthi noma eyimpuphu elungiswe ngokufakwa kwe-alkaline cellulose ne-ethylene oxide (noma i-chlorohydrin).I-Nonionic soluble cellulose ethers.Ngaphezu kokuqina, ukumisa, ukubopha, ukuntanta, ukwenza ifilimu, ukusabalalisa, ukugcina amanzi kanye nokuhlinzeka ngama-colloid okuzivikela, inalezi zinto ezilandelayo:
1. I-HEC iyancibilika emanzini ashisayo noma abandayo, futhi ayidli ngokushisa okuphezulu noma ukubilisa, ukuze ibe nezinhlobonhlobo eziningi zokuncibilika kanye nezici ze-viscosity, kanye ne-gelation engashisi;
2. I-non-ionic ngokwayo ingahlala kanye nohlu olubanzi lwama-polymers ancibilikayo emanzini, ama-surfactants nama-salts, futhi iyi-colloidal thickener enhle kakhulu equkethe izixazululo ze-electrolyte eziphezulu zokugxila;
3. Umthamo wokugcina amanzi uphakeme ngokuphindwe kabili kunalowo we-methyl cellulose, futhi unokulawula ukugeleza okungcono.
4. Uma kuqhathaniswa ne-methyl cellulose eyaziwayo kanye ne-hydroxypropyl methyl cellulose, ikhono lokuhlakaza le-HEC libi kakhulu, kodwa i-colloid evikelayo inamandla amakhulu.Ngenxa yokuthi i-HEC inezakhiwo ezinhle zokuqina, ukumisa, ukuhlakaza, i-emulsifying, ukubopha, ukwenza ifilimu, ukuvikela umswakama nokuhlinzeka nge-colloid evikelayo, iye yasetshenziswa kabanzi ekuhloleni amafutha, ukugqoka, ukwakhiwa, imithi nokudla, indwangu, iphepha kanye ne-polymerization nezinye izinkambu.
Izinyathelo zokuzivikela:
Njengoba i-hydroxyethyl cellulose efakwe phezulu iyimpushana noma i-cellulose eqinile, kulula ukuyiphatha futhi incibilike emanzini inqobo nje uma lezi zindaba ezilandelayo ziphawulwa.
1. Ngaphambi nangemva kokwengeza i-hydroxyethyl cellulose, kufanele inyakaziswe ngokuqhubekayo kuze kube yilapho isisombululo sisobala ngokuphelele futhi sicacile.
2. Kumele ihlungwe emgqonyeni wokuxuba kancane kancane, futhi ungafaki ngokuqondile i-cellulose ye-hydroxyethyl eyakheke yaba izigaxa namabhola emgqonyeni wokuxuba.
3. Izinga lokushisa lamanzi kanye nenani le-pH lamanzi linobudlelwano obusobala nokuqedwa kwe-hydroxyethyl cellulose, ngakho-ke kufanele kuqashelwe ngokukhethekile.
4. Ungalokothi wengeze okuthile okune-alkali engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder ifudunyezwe ngamanzi.Ukuphakamisa inani elingu-PH ngemva kokufudumala kuyasiza ekuhlakazweni.
5. Ngokusemandleni akho, engeza ama-antifungal agents ngokushesha ngangokunokwenzeka.
6. Uma usebenzisa i-high-viscosity hydroxyethyl cellulose, ukugxila kotshwala kamama akufanele kube ngaphezu kuka-2.5-3%, ngaphandle kwalokho utshwala bomama buyoba nzima ukuphatha.I-hydroxyethyl cellulose ngemuva kokwelashwa ngokuvamile akulula ukwenza izigaxa noma ama-sphere, futhi ngeke yakhe ama-colloid ayindilinga angancibiliki ngemva kokungeza amanzi.
Isikhathi sokuthumela: Nov-15-2022