Iyini iHydroxyethyl Cellulose?
IHydroxyethyl cellulose (HEC), okuphuzi okumhlophe noma okukhanyayo, okunganuki, okuqinile okunganabuthi noma okuyimpuphu, okulungiselelwe ukusabela kwe-etherification ye-alkaline cellulose ne-ethylene oxide (noma i-chlorohydrin), ingeka-Nonionic soluble cellulose ethers. Njengoba i-HEC inezakhiwo ezinhle zokuqina, ukumisa, ukuhlakazeka, ukuhlanganisa, ukubopha, ukwenza ifilimu, ukuvikela umswakama nokuhlinzeka nge-colloid evikelayo, iye yasetshenziswa kabanzi ekuhloleni amafutha, ukugqoka, ukwakhiwa, imithi, ukudla, izindwangu, ukwenza iphepha kanye ne-polymerization. nezinye izinkambu.
Kwenzekani lapho i-hydroxyethyl cellulose ihlangana nopende osuselwe emanzini?
Njengomuntu osebenza ngaphansi kwe-non-ionic,i-hydroxyethyl celluloseinalezi zakhiwo ezilandelayo ngaphezu kokujiya, ukumisa okwesikhashana, ukubopha, ukuntanta, ukwenza ifilimu, ukuhlakazeka, ukugcinwa kwamanzi nokuhlinzeka nge-colloid evikelayo:
I-HEC iyancibilika 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;
Umthamo wokugcina amanzi uphakeme ngokuphindwe kabili kunalowo we-methyl cellulose, futhi unokulawulwa okungcono kokugeleza;
Uma kuqhathaniswa ne-methyl cellulose eyaziwayo kanye ne-hydroxypropyl methyl cellulose, ikhono lokuhlakaza le-HEC libi kakhulu, kodwa ikhono le-colloid lokuvikela linamandla kakhulu.
Ayiyona i-ionic futhi ingahlala nohlu olubanzi lwama-polymers ancibilika emanzini, ama-surfactants, nosawoti. Kuyinto enhle kakhulu ye-colloidal thickener yezixazululo eziphezulu ze-electrolyte;
Ungayisebenzisa kanjani i-hydroxyethyl cellulose? Ungayengeza kanjani?
Engeza ngokuqondile ngesikhathi sokukhiqiza - le ndlela ilula kakhulu futhi ithatha isikhathi esifushane kakhulu.
Engeza amanzi ahlanzekile ebhakedeni elikhulu elifakwe umxube wokugunda okuphezulu. Qala ukunyakazisa ngokuqhubekayo ngesivinini esiphansi bese uhlunga kancane kancane i-hydroxyethyl cellulose esixazululweni ngokulinganayo. Qhubeka ugoqa kuze kube yilapho zonke izinhlayiya sezicwile. Bese wengeza ama-preservatives kanye nezithasiselo ezihlukahlukene. Okufana nezingulube, izinsiza zokusabalalisa, amanzi e-ammonia, njll. Gcoba kuze kube yilapho yonke i-hydroxyethyl cellulose ichitheka ngokuphelele (i-viscosity yesisombululo ikhula kakhulu) ngaphambi kokwengeza ezinye izingxenye kufomula yokusabela.
Ifakwe utshwala bukamama
Kuwukulungisa ugologo kamama ngokugcwala okuphezulu kuqala, bese ulengeza emkhiqizweni. Inzuzo yale ndlela yukuthi inokuguquguquka okukhulu futhi ingafakwa ngokuqondile kumkhiqizo ophelile, kodwa kufanele igcinwe kahle. Izinyathelo zale ndlela zifana nezinyathelo eziningi endleleni 1; umehluko wukuthi asikho isidingo se-high-shear agitator, futhi ama-agitator athile kuphela anamandla anele okugcina i-hydroxyethyl cellulose ihlakazeke ngokulinganayo kusixazululo ingaqhutshwa ngaphandle kokumisa Ukugqugquzela kuze kube yilapho kuqedwa ngokuphelele kusixazululo se-viscous. Kodwa-ke, kufanele kuqashelwe ukuthi umuthi obulala isikhunta kufanele ufakwe etshwaleni likamama ngokushesha okukhulu.
Njengoba i-hydroxyethyl cellulose efakwe phezulu iyimpuphu noma i-fibrous solid, uLihongde ukukhumbuza ukuthi unake amaphuzu alandelayo lapho ulungiselela ugologo kamama we-hydroxyethyl cellulose:
(1) Ngaphambi nangemva kokwengeza i-hydroxyethyl cellulose, kufanele inyakaziswe ngokuqhubekayo kuze kube yilapho isixazululo sisobala ngokuphelele futhi sicacile.
(2) Kumelwe ihlungwe kancane kancane ethangini lokuxuba, futhi ingafaki inani elikhulu noma ifake ngokuqondile i-hydroxyethyl cellulose ethangini lokuxuba.
(3) Izinga lokushisa lamanzi kanye nenani le-PH emanzini linobudlelwano obubalulekile nokuqedwa kwe-hydroxyethyl cellulose, ngakho-ke kufanele kuqashelwe ngokukhethekile.
(4) Ungangezi ezinye izinto ezine-alkali engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder icwiliswe ngamanzi. Ukuphakamisa i-pH ngemva kokumanzisa kusiza ukuncibilika.
(5) Ngokusemandleni akho, engeza i-ejenti ye-antifungal kusengaphambili
(6) Uma usebenzisa i-high-viscosity hydroxyethyl cellulose, ukugcwala kotshwala kamama akumele kube ngaphezu kuka-2.5-3% (ngesisindo), ngaphandle kwalokho utshwala bukamama buyoba nzima ukubuphatha.
Isikhathi sokuthumela: Dec-26-2022