Uyini umehluko phakathi kwe-hydroxyethyl cellulose ne-hydroxypropyl cellulose?

IHydroxyethylcellulose (HEC) kanye ne-hydroxypropylcellulose (HPC) zombili ziphuma ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo.Lezi zinto eziphuma ku-cellulose zisetshenziswa kakhulu ezimbonini ezahlukahlukene ngenxa yezakhiwo zazo ezihlukile.

Isakhiwo samakhemikhali:

I-Hydroxyethylcellulose (HEC):

I-HEC ihlanganiswa ngokuphendula i-cellulose nge-ethylene oxide.
Esakhiweni samakhemikhali se-HEC, amaqembu e-hydroxyethyl angeniswa kumgogodla we-cellulose.
I-degree of substitution (DS) imele inani elimaphakathi lamaqembu e-hydroxyethyl ngeyunithi ngayinye ye-glucose kuketango le-cellulose.

IHydroxypropylcellulose (HPC):

I-HPC ikhiqizwa ngokwelapha i-cellulose nge-propylene oxide.
Ngesikhathi senqubo yokuhlanganisa, amaqembu e-hydroxypropyl engezwa esakhiweni se-cellulose.
Ngokufanayo ne-HEC, izinga lokushintsha lisetshenziselwa ukulinganisa izinga lokushintshwa kwe-hydroxypropyl ku-molecule ye-cellulose.

isici:

I-Hydroxyethylcellulose (HEC):

I-HEC yaziwa ngamakhono ayo amahle kakhulu okugcina amanzi, okuyenza ibe isithako esivamile ezinhlobonhlobo zokujiya nokufaka i-gelling.
Yakha isixazululo esicacile emanzini futhi ibonise ukuziphatha kwe-pseudoplastic, okusho ukuthi iba yi-viscous encane ngaphansi kwengcindezi ye-shear.
I-HEC ivame ukusetshenziswa ekwakhiweni kwemikhiqizo yokunakekelwa komuntu siqu, imithi, futhi njenge-thickener kuma-coatings asekelwe emanzini.

IHydroxypropylcellulose (HPC):

I-HPC futhi inezindawo ezinhle zokuncibilika kwamanzi kanye nezakhiwo zefilimu.
Inohlu olubanzi lokuhambisana nezincibilikisi ezihlukene kune-HEC.
I-HPC ivamise ukusetshenziswa njengesibophezelo ekwenziweni kwemithi, emikhiqizweni yokunakekelwa ngomlomo, nasekukhiqizweni kwamathebulethi.

isicelo:

I-Hydroxyethylcellulose (HEC):

Isetshenziswa kakhulu ezimbonini zezimonyo nezinakekelwa umuntu njenge-thickener kuma-shampoos, ama-lotions nama-creams.
Isetshenziswa njenge-stabilizer kanye nesilawuli se-viscosity ekwakhiweni kwemithi.
Isetshenziswa ekukhiqizeni amapende asekelwe emanzini kanye nama-coatings.

IHydroxypropylcellulose (HPC):

Isetshenziswa kakhulu emikhakheni yemithi, ikakhulukazi njenge-binder ekwenzeni amaphilisi.
Isetshenziswa emikhiqizweni yokunakekelwa komlomo njenge-toothpaste ngenxa yezakhiwo zayo zokujiya.
Ingasetshenziswa ezinhlelweni ezilawulwayo zokulethwa kwezidakamizwa.

Nakuba i-hydroxyethyl cellulose (HEC) ne-hydroxypropyl cellulose (HPC) zabelana ngokufana okuthile ngenxa yemvelaphi yazo ye-cellulose, ziyehluka ngesakhiwo samakhemikhali, izakhiwo, kanye nokusebenza.I-HEC ivame ukuthandwa ekunakekelweni komuntu siqu nasekuhlanganiseni ukwakheka kwamanzi okugcina amanzi kanye namandla okuqina, kuyilapho i-HPC isetshenziswa kakhulu embonini yezemithi, ikakhulukazi ekukhiqizeni amaphilisi kanye nezinhlelo zokulethwa kwezidakamizwa ezilawulwayo.Ukuqonda lo mehluko kubalulekile ekukhetheni okuphuma ku-cellulose okufanele kwezinhlelo zokusebenza ezithile zezimboni.