I-Hydroxyethyl cellulose (HEC)iwumbala ophuzi omhlophe noma okhanyayo, ongenaphunga, ongenabuthi noma oqinile oyimpuphu, olungiswa ngokusabela kwe-etherification ye-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 nge-colloid evikelayo, inalezi zinto ezilandelayo:
1. I-HEC inyibilika emanzini ashisayo noma emanzini abandayo, izinga lokushisa eliphezulu noma abilayo ngaphandle kwemvula, ukuze ibe nohlu olubanzi lwezimpawu ze-solubility kanye ne-viscosity, kanye ne-gelation engashisi;
2. Ayiyona i-ionic futhi ingahlala nohlu olubanzi lwama-polymers ancibilika emanzini, ama-surfactants, nosawoti. Kuyinto enhle kakhulu ye-colloidal thickener yezixazululo eziphezulu ze-electrolyte;
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 ikhono le-colloid lokuvikela liqine kakhulu. Ngenxa yezakhiwo zayo ezinhle zokuqina, ukumisa, ukuhlakazeka, ukuhlanganisa, ukunamathela, ukwenza ifilimu, ukuvikela umswakama nokuhlinzeka nge-colloid evikelayo, i-HEC isetshenziswe kabanzi ekuhloleni uwoyela, ukugqoka, ukwakhiwa, imithi, ukudla, izindwangu, iphepha kanye ne-polymerization. nezinye izinkambu.
Izinyathelo zokuzivikela:
Njengoba i-hydroxyethyl cellulose ehlanjululwe phezulu iyimpushana noma i-cellulose eqinile, kulula ukuyiphatha futhi iyincibilikise emanzini inqobo nje uma izinto ezilandelayo zinakwa. i
1. Ngaphambi nangemva kokwengeza i-hydroxyethyl cellulose, kufanele inyakaziswe ngokuqhubekayo kuze kube yilapho isisombululo sisobala ngokuphelele futhi sicacile. i
2. Kumele ihlungwe kancane kancane ethangini lokuxuba, ungafaki ngokuqondile inani elikhulu le-hydroxyethyl cellulose noma i-hydroxyethyl cellulose eyenze izigaxa namabhola ethangini lokuxuba. i
3. Izinga lokushisa lamanzi kanye nenani le-PH emanzini kunobudlelwane obusobala nokuqedwa kwe-hydroxyethyl cellulose, ngakho-ke kufanele kuqashelwe ngokukhethekile. i
4. Ungafaki izinto ezine-alkali engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder ifudunyezwe emanzini. Ukuphakamisa inani elingu-PH ngemva kokufudumala kuzosiza ukuncibilika. i
5. Ngokusemandleni akho, engeza i-anti-fungal agent ngokushesha ngangokunokwenzeka. i
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-spherical colloids angancibiliki ngemva kokungeza amanzi.
Isikhathi sokuthumela: Dec-27-2022