Umehluko Phakathi kwe-HEC ne-EC

I-HEC ne-EC yizinhlobo ezimbili zama-cellulose ethers anezakhiwo ezihlukene kanye nezicelo. I-HEC imele i-hydroxyethyl cellulose, kuyilapho i-EC imele i-ethyl cellulose. Kulesi sihloko, sizoxoxa ngomehluko phakathi kwe-HEC ne-EC ngokwesakhiwo samakhemikhali, izakhiwo, ukusetshenziswa, nokuphepha.

1. Isakhiwo Samakhemikhali

I-HEC ne-EC inezakhiwo zamakhemikhali ezihlukene ezibanika izakhiwo ezihlukene. I-HEC iyi-polymer encibilika emanzini etholakala ku-cellulose. Kuyi-ether ye-cellulose eguquliwe enamaqembu e-hydroxyethyl axhunywe kumgogodla we-cellulose. I-degree of substitution (DS) ye-HEC ibhekisela enanini lamaqembu e-hydroxyethyl akhona ngeyunithi ngayinye ye-anhydroglucose (AGU) yomgogodla we-cellulose. I-DS ye-HEC ingaba kusuka ku-0.1 kuye ku-3.0, ngamavelu e-DS aphezulu abonisa izinga eliphezulu lokushintsha.

I-EC, ngakolunye uhlangothi, i-polymer engancibiliki emanzini nayo etholakala ku-cellulose. I-ether ye-cellulose eguquliwe enamaqembu e-ethyl axhunywe kumgogodla we-cellulose. I-DS ye-EC ibhekisela enanini lamaqembu e-ethyl akhona nge-AGU ngayinye yomgogodla we-cellulose. I-DS ye-EC ingaba kusuka ku-1.7 kuye ku-2.9, ngamavelu e-DS aphezulu abonisa izinga eliphezulu lokushintsha.

2. Izakhiwo

I-HEC ne-EC zinezakhiwo ezihlukene ezizenza zifanelekele izinhlelo zokusebenza ezahlukene. Ezinye zezakhiwo ezibalulekile ze-HEC ne-EC zibalwe ngezansi:

a. Ukunyibilika: I-HEC incibilika kakhulu emanzini, kuyilapho i-EC ingancibiliki emanzini. Kodwa-ke, i-EC ingancibilika kuzincibilikisi zemvelo njenge-ethanol, i-acetone, ne-chloroform.

b. I-Rheology: I-HEC iyimpahla ye-pseudoplastic, okusho ukuthi ibonisa ukuziphatha kokugunda kwe-shear. Lokhu kusho ukuthi i-viscosity ye-HEC iyancipha njengoba izinga lokugunda likhuphuka. I-EC, ngakolunye uhlangothi, iyimpahla ye-thermoplastic, okusho ukuthi ingathanjiswa futhi ibunjwe lapho ishiswa.

c. Izakhiwo zokwakha ifilimu: I-HEC inezinto ezinhle zokwenza ifilimu, eziyenza ifanelekele ukusetshenziswa ekubanjeni namafilimu. I-EC nayo inezinto zokwenza amafilimu, kodwa amafilimu angase abe mancane futhi athambekele ekuqhekekeni.

d. Ukuzinza: I-HEC izinzile phezu kobubanzi be-pH nezimo zokushisa. I-EC futhi izinzile phezu kwebanga elibanzi le-pH, kodwa ukuzinza kwayo kungase kuthonywe amazinga okushisa aphezulu.

3. Isebenzisa

I-HEC ne-EC zisetshenziswa ezinhlobonhlobo zezicelo ezimbonini zokudla, ezemithi, nezokunakekelwa komuntu siqu. Ezinye zezinto ezibalulekile ezisetshenziswa yi-HEC ne-EC zibalwe ngezansi:

a. Imboni yokudla: I-HEC ivame ukusetshenziswa njenge-thickener, stabilizer, kanye ne-emulsifier emikhiqizweni yokudla efana namasoso, okokugqoka, nezinto ezibhakwayo. I-EC isetshenziswa njenge-ejenti yokugcoba emikhiqizweni yokudla efana ne-chewing gum, i-confectionery, namaphilisi.

b. Imboni yezemithi: I-HEC isetshenziswa njenge-binder, disintegrant, kanye ne-ejenti yokuhlanganisa ithebhulethi ekwenziweni kwemithi. I-EC isetshenziswa njenge-binder, i-ejenti enamathelayo, kanye ne-ejenti ekhishwa njalo ekwenziweni kwemithi.

4. Ukuphepha

I-HEC ne-EC ngokuvamile zibhekwa njengeziphephile ukuze zisetshenziswe ekudleni nasezinhlelweni zemithi. Kodwa-ke, njenganoma iyiphi into yamakhemikhali, kungase kube nezingozi ezithile ezihlobene nokusetshenziswa kwazo. Kubalulekile ukulandela iziqondiso ezinconyiwe zokusetshenziswa kwe-HEC ne-EC ukuze kuqinisekiswe ukusetshenziswa kwazo okuphephile nokusebenza ngempumelelo.