Kusiyana Pakati pa HEC ndi EC

HEC ndi EC ndi mitundu iwiri ya ma cellulose ether okhala ndi katundu ndi ntchito zosiyanasiyana. HEC imayimira hydroxyethyl cellulose, pomwe EC imayimira ethyl cellulose. M'nkhaniyi, tidzakambirana za kusiyana pakati pa HEC ndi EC ponena za kapangidwe kake ka mankhwala, katundu, ntchito, ndi chitetezo.

1. Kapangidwe ka Chemical

HEC ndi EC ali ndi mankhwala osiyanasiyana omwe amawapatsa katundu wosiyana. HEC ndi polima yosungunuka m'madzi yomwe imachokera ku cellulose. Ndi ether yosinthidwa ya cellulose yomwe ili ndi magulu a hydroxyethyl omwe amamangiriridwa pamsana wa cellulose. Digiri ya substitution (DS) ya HEC imatanthawuza kuchuluka kwa magulu a hydroxyethyl omwe amapezeka pa anhydroglucose unit (AGU) ya cellulose backbone. Ma DS a HEC amatha kuyambira 0.1 mpaka 3.0, okhala ndi ma DS apamwamba omwe akuwonetsa kuchuluka kwa m'malo.

EC, kumbali ina, ndi polima yosasungunuka m'madzi yomwe imachokera ku cellulose. Ndi ether yosinthidwa ya cellulose yomwe ili ndi magulu a ethyl omwe amamangiriridwa pamsana wa cellulose. DS ya EC imatanthawuza kuchuluka kwa magulu a ethyl omwe amapezeka pa AGU ya cellulose backbone. Ma DS a EC amatha kuchoka pa 1.7 mpaka 2.9, ndi ma DS apamwamba akuwonetsa kuchuluka kwa m'malo.

2. Katundu

HEC ndi EC ali ndi zinthu zosiyanasiyana zomwe zimawapangitsa kukhala oyenera ntchito zosiyanasiyana. Zina mwazinthu zazikulu za HEC ndi EC zalembedwa pansipa:

a. Solubility: HEC imasungunuka kwambiri m'madzi, pomwe EC imasungunuka m'madzi. Komabe, EC imatha kusungunuka mu zosungunulira za organic monga ethanol, acetone, ndi chloroform.

b. Rheology: HEC ndi zinthu za pseudoplastic, zomwe zikutanthauza kuti zimawonetsa kumeta ubweya wa ubweya. Izi zikutanthauza kuti kukhuthala kwa HEC kumachepa pamene kumeta ubweya wa ubweya ukuwonjezeka. Komano, EC ndi thermoplastic material, zomwe zikutanthauza kuti imatha kufewetsa ndikuwumbidwa ikatenthedwa.

c. Mafilimu opanga mafilimu: HEC ili ndi zinthu zabwino zopangira mafilimu, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito popaka ndi mafilimu. EC ilinso ndi zinthu zopangira mafilimu, koma mafilimu amatha kukhala osasunthika komanso osavuta kusweka.

d. Kukhazikika: HEC imakhala yokhazikika pamitundu yambiri ya pH ndi kutentha. EC imakhazikikanso pamitundu yambiri ya pH, koma kukhazikika kwake kumatha kukhudzidwa ndi kutentha kwambiri.

3. Ntchito

HEC ndi EC amagwiritsidwa ntchito m'mafakitale osiyanasiyana azakudya, zamankhwala, ndi zosamalira anthu. Zina mwazofunikira za HEC ndi EC zalembedwa pansipa:

a. Makampani azakudya: HEC imagwiritsidwa ntchito kwambiri ngati chowonjezera, chokhazikika, ndi emulsifier muzakudya monga sosi, mavalidwe, ndi zinthu zophika. EC imagwiritsidwa ntchito ngati chophimbira pazakudya monga kutafuna chingamu, confectionery, ndi mapiritsi.

b. Makampani opanga mankhwala: HEC imagwiritsidwa ntchito ngati binder, disintegrant, ndi mapiritsi ❖ kuyanika pakupanga mankhwala. EC imagwiritsidwa ntchito ngati chomangira, chotchingira, komanso chotulutsa mosalekeza pamapangidwe amankhwala.

4. Chitetezo

HEC ndi EC nthawi zambiri zimawonedwa ngati zotetezeka kuti zigwiritsidwe ntchito pazakudya ndi zamankhwala. Komabe, monga momwe zimakhalira ndi mankhwala aliwonse, pakhoza kukhala zoopsa zina zomwe zimagwirizanitsidwa ndi kugwiritsidwa ntchito kwawo. Ndikofunika kutsatira malangizo ogwiritsira ntchito HEC ndi EC kuti atsimikizire kuti akugwiritsidwa ntchito motetezeka komanso mogwira mtima.