I-Hydroxyethyl cellulose (HEC) iyi-polymer engeyona i-ionic, encibilika emanzini etholakala ku-cellulose, i-polymer eyenzeka ngokwemvelo etholakala ezindongeni zamaseli ezitshalo. Isetshenziswa kakhulu ezimbonini ezahlukahlukene ezifana nemithi, izimonyo, upende, izinto zokunamathisela, nemikhiqizo yokudla ngenxa yezakhiwo zayo ezihlukile njengokujiya, ukusimamisa, kanye namandla okugcina amanzi. Kodwa-ke, ukuxoxa ngenani le-pH le-HEC kudinga ukuqonda okubanzi kwezakhiwo zayo, ukwakheka, kanye nezicelo.
Ukuqonda i-Hydroxyethyl Cellulose (HEC):
1. Isakhiwo Samakhemikhali:
I-HEC ihlanganiswa ukusabela kwe-cellulose nge-ethylene oxide, okuholela ekwethulweni kwamaqembu e-hydroxyethyl (-CH2CH2OH) kumgogodla we-cellulose.
I-degree of substitution (DS) ibhekisela enanini eliyisilinganiso lamaqembu e-hydroxyethyl ngeyunithi ngayinye ye-glucose ochungechungeni lwe-cellulose futhi inquma izici ze-HEC. Amanani aphezulu e-DS aholela ekwandeni kokuncibilika kwamanzi kanye ne-viscosity ephansi.
2. Izakhiwo:
I-HEC iyancibilika emanzini futhi yenza izixazululo ezicacile, okwenza ifaneleke izinhlelo zokusebenza ezihlukahlukene ezidinga ukwakheka okusobala.
Ibonisa ukuziphatha kwe-pseudoplastic, okusho ukuthi i-viscosity yayo iyancipha ngaphansi kwengcindezi ye-shear, okuvumela ukusetshenziswa okulula nokubamba.
I-viscosity yezixazululo ze-HEC ithonywa izici ezifana nokugxila, izinga lokushisa, i-pH, nokuba khona kukasawoti noma ezinye izithasiselo.
3. Izinhlelo zokusebenza:
Ezemithi: I-HEC isetshenziswa njenge-thickener kanye ne-stabilizer ekwakhiweni kwemithi yomlomo neyesihloko njengamafutha okugcoba, okhilimu, nokumiswa.
Izimonyo: Kuyisithako esivamile emikhiqizweni yokunakekelwa komuntu siqu okuhlanganisa ama-shampoos, ama-lotion, nama-creams ngenxa yezakhiwo zayo zokujiya kanye ne-emulsifying.
Amapende nama-Coatings: I-HEC yengezwa kumapende, embotsheni, nasezinamathiselwe ukuze kulawulwe i-viscosity, ukuthuthukisa izakhiwo zokugeleza, nokuthuthukisa ukwakheka kwefilimu.
Imboni Yokudla: Emikhiqizweni yokudla, i-HEC isebenza njenge-thickener, stabilizer, kanye ne-emulsifier ezintweni ezifana namasoso, okokugqoka, nemikhiqizo yobisi.
I-pH Inani le-Hydroxyethyl Cellulose (HEC):
1. Ukuncika kwe-pH:
I-pH yesisombululo esiqukethe i-HEC ingaba nomthelela ekuziphatheni nasekusebenzeni kwayo ezinhlelweni ezihlukene.
Ngokuvamile, i-HEC izinzile phezu kwebanga elibanzi le-pH, ngokuvamile eliphakathi kwe-pH 2 ne-pH 12. Nokho, izimo ze-pH ezidlulele zingathinta izici zayo nokuzinza.
2. I-pH Imithelela ku-Viscosity:
I-viscosity yezixazululo ze-HEC ingancika ku-pH, ikakhulukazi kumanani e-pH aphezulu noma aphansi.
Eduze kwebanga le-pH elingathathi hlangothi (pH 5-8), izixazululo ze-HEC zivame ukubonisa i-viscosity yazo ephezulu.
Emazingeni aphansi kakhulu noma aphezulu we-pH, umgogodla we-cellulose ungase ube ne-hydrolysis, okuholela ekwehleni kwe-viscosity nokuzinza.
3. Ukulungiswa kwe-pH:
Ekwakheni lapho kudingeka ukulungiswa kwe-pH, izigcinalwazi zivame ukusetshenziselwa ukugcina ibanga le-pH elifunekayo.
Amabhafa avamile afana namabhafa e-citrate noma e-phosphate ahambisana ne-HEC futhi asiza ukuzinzisa izakhiwo zawo phakathi kwebanga elithile le-pH.
4. Ukucatshangelwa kwesicelo:
Abakhiqizi kufanele bacabangele ukuhambisana kwe-pH kwe-HEC nezinye izithako ekwakhiweni.
Kwezinye izimo, ukulungiswa ku-pH yokwakheka kungase kudingeke ukuze kuthuthukiswe ukusebenza kwe-HEC.
IHydroxyethyl cellulose (HEC) iyi-polymer eguquguqukayo esetshenziswa kabanzi kuzo zonke izimboni ezahlukahlukene. Nakuba ukuzinza kwayo kwe-pH ngokuvamile kunamandla phezu kohlu olubanzi, ukweqisa kwe-pH kungaba nomthelela ekusebenzeni kwayo nokuzinza. Ukuqonda ukuncika kwe-pH kwe-HEC kubalulekile ekwenziweni kwemikhiqizo esebenzayo nezinzile kwezemithi, izimonyo, amapende, izinto ezinamathelayo, nemikhiqizo yokudla. Ngokucabangela ukuhambisana kwe-pH nokusebenzisa amasu okwakheka afanelekile, i-HEC ingaqhubeka isebenza njengesithako esibalulekile ezinhlobonhlobo zezinhlelo zokusebenza.
Isikhathi sokuthumela: Apr-15-2024