Uyini umehluko phakathi kwe-HPMC ne-HEMC?

I-HPMC (Hydroxypropyl Methylcellulose) kanye ne-HEMC (Hydroxyethyl Methylcellulose) kokubili okuphuma ku-cellulose asetshenziswa njengama-thickeners, ama-binder, nama-emulsifiers emikhiqizweni eyahlukene. Zombili zitholakala ku-cellulose, i-polysaccharide yemvelo etholakala ezitshalweni.

Umehluko omkhulu phakathi kwe-HPMC ne-HEMC wuhlobo lwamaqembu e-hydroxypropyl kanye ne-hydroxyethyl anamathiselwe ku-molecule ye-cellulose. I-HPMC inamaqembu e-hydroxypropyl anamathiselwe ku-molecule ye-cellulose, kuyilapho i-HEMC inamaqembu e-hydroxyethyl anamathiselwe. Lo mehluko ohlotsheni lwamaqembu e-hydroxypropyl kanye ne-hydroxyethyl uthinta izakhiwo zokuphuma kokuphuma kwe-cellulose okubili.

I-HPMC incibilika kakhulu emanzini abandayo kune-HEMC, futhi imelana kakhulu nezinga lokushisa. Ine-viscosity ephakeme kune-HEMC, futhi imelana kakhulu ne-asidi ne-alkali. Iphinde imelane kakhulu nokuwohloka kwamagciwane. I-HPMC isetshenziswa emikhiqizweni eyahlukene, okuhlanganisa ukudla, imithi, kanye nezimonyo.

I-HEMC ayincibiliki kancane emanzini abandayo kune-HPMC, futhi ayizweli kancane ekushintsheni kwezinga lokushisa. Ine-viscosity ephansi kune-HPMC, futhi ayizweli kancane ku-asidi ne-alkali. Iphinde imelane kancane nokuwohloka kwamagciwane. I-HEMC isetshenziswa emikhiqizweni eyahlukene, okuhlanganisa ukudla, imithi, kanye nezimonyo.

Kafushane, i-HPMC kanye ne-HEMC womabili okuphuma ku-cellulose asetshenziswa njengamajini, ama-binder, nama-emulsifiers emikhiqizweni eyahlukene. Umehluko omkhulu phakathi kwalokhu okubili uhlobo lwe-hydroxypropyl namaqembu e-hydroxyethyl axhunywe ku-molecule ye-cellulose. I-HPMC inamaqembu e-hydroxypropyl anamathiselwe ku-molecule ye-cellulose, kuyilapho i-HEMC inamaqembu e-hydroxyethyl anamathiselwe. Lo mehluko ohlotsheni lwamaqembu e-hydroxypropyl kanye ne-hydroxyethyl uthinta izakhiwo zokuphuma kokuphuma kwe-cellulose okubili.