1. Isingeniso se-Hydroxyethyl Cellulose (HEC):
IHydroxyethylcellulose iphuma ku-cellulose encibilika emanzini, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo.Ukuguqulwa kwe-cellulose ngamaqembu e-hydroxyethyl kuthuthukisa ukuncibilika kwayo emanzini futhi kunikeza izakhiwo ezithile ku-HEC, okwenza i-HEC ibe yinto ebalulekile ekusetshenzisweni okuhlukahlukene.
2. Isakhiwo se-HEC:
Isakhiwo se-HEC sitholakala ku-cellulose, i-polysaccharide eqondile eyakhiwe amayunithi e-glucose aphindaphindiwe axhunywe ngamabhondi e-β-1,4-glycosidic.Amaqembu e-Hydroxyethyl angeniswa kumgogodla we-cellulose ngokusabela kwe-etherification.I-Degree of substitution (DS) ibhekisela enanini eliyisilinganiso lamaqembu e-hydroxyethyl ngeyunithi ngayinye ye-glucose futhi ithinta ukunyibilika nokubonakala kwe-HEC.
3. Izici ze-HEC:
A. Ukunyibilika kwamanzi: Enye yezinto ezibalulekile ze-HEC ukuncibilika kwayo okuphezulu emanzini, okubangelwa ukushintshwa kwe-hydroxyethyl.Lesi sakhiwo senza kube lula ukwenza izixazululo kanye ne-dispersions ezifanele izinhlelo zokusebenza ezihlukahlukene.
b.Ikhono lokujiya: I-HEC yaziwa kabanzi ngezakhiwo zayo ezijiyayo ezixazululweni ezinamanzi.Uma ihlakazekile emanzini, yenza ijeli ecacile ne-viscous, eyenza ifaneleke izinhlelo zokusebenza ezidinga ukulawulwa kwe-viscosity.
C. pH Ukuzinza: I-HEC ibonisa ukuzinza phezu kwebanga elibanzi le-pH, iyenze ihambisane nokwakheka kuzo zombili izindawo ezine-asidi ne-alkali.
d.Ukuqina kwezinga lokushisa: Izixazululo ze-HEC zihlala zizinzile ebangeni lokushisa elibanzi.Bangakwazi ukungena emijikelezweni eminingi yokufudumeza nokupholisa ngaphandle kwezinguquko ezibalulekile ku-viscosity noma ezinye izakhiwo.
e.Ukwakhiwa kwefilimu: I-HEC ingakha amafilimu aguquguqukayo nasobala afanele ukusetshenziswa okufana nokumbozwa, okunamathelayo namafilimu.
F. Umsebenzi Wendawo: I-HEC inezinto ezifana ne-surfactant, enenzuzo ezinhlelweni ezidinga ukulungiswa kwendawo noma ukuqiniswa.
4. Ukuhlanganiswa kwe-HEC:
Ukuhlanganiswa kwe-HEC kuhilela ukusabela kwe-etherification ye-cellulose ne-ethylene oxide phambi kwe-catalyst ye-alkaline.Ukusabela kungalawulwa ukuze kuzuzwe izinga elifiswayo lokushintshwa, ngaleyo ndlela kuthinte izakhiwo zokugcina zomkhiqizo we-HEC.I-synthesis ngokuvamile yenziwa ngaphansi kwezimo ezilawulwayo ukuze kuqinisekiswe ukuvumelana komkhiqizo kanye nekhwalithi.
5. Ukusetshenziswa kwe-HEC:
A. Paints and Coatings: I-HEC isetshenziswa kabanzi njenge-thickener kumapende asekelwe emanzini kanye nama-coatings.Ithuthukisa i-rheology, ithuthukise ukuxubha, futhi ifake isandla ekuzinzeni kokwakheka.
b.Imikhiqizo yokunakekelwa komuntu siqu: I-HEC iyisithako esivamile emikhiqizweni yokunakekelwa komuntu siqu njengama-shampoos, ama-lotions nama-creams.Isebenza njenge-thickener, stabilizer kanye ne-ejenti yokwakha ifilimu, ithuthukisa ukusebenza okuphelele kwalezi zakhiwo.
C. Ezemithi: Embonini yezemithi, i-HEC isetshenziswa ekwenziweni komlomo kanye nesihloko.Ingasebenza njenge-binder, disintegrant, noma i-matrix yangaphambili ekwakhiweni kwethebulethi, futhi njengesilungisi se-viscosity kumajeli wezihloko nokhilimu.
d.Izinto zokwakha: I-HEC isetshenziswa embonini yezokwakha njenge-ejenti yokugcina amanzi ekwakhiweni okusekelwe kusimende.Ithuthukisa ukusebenza kokwakhiwa, inweba isikhathi esivulekile, futhi ithuthukise ukunamathela kwezinamathelisi zamathayili nodaka.
e.Imboni Kawoyela Negesi: I-HEC isetshenziswa embonini kawoyela negesi njenge-ejenti ejiya yokumba uketshezi.Isiza ukulawula i-viscosity futhi inikeza izakhiwo zokumisa ukuvimbela izinhlayiya ukuthi zingahlali.
F. Imboni Yokudla: I-HEC isetshenziswa embonini yokudla njenge-thickener, stabilizer kanye ne-gelling agent emikhiqizweni eyahlukene, okuhlanganisa amasoso, okokugqoka kanye nama-dessert.
6. Ukucatshangelwa kwemithetho:
I-HEC ngokuvamile ibonwa njengephephile (i-GRAS) yizinkampani ezilawulayo futhi ukusetshenziswa kwayo ezinhlelweni ezihlukahlukene kulawulwa ukuze kuqinisekiswe ukuphepha kwabathengi nokusebenza komkhiqizo.Abakhiqizi kufanele bahambisane nemithetho yesifunda futhi bathole ukugunyazwa okudingekayo kwezicelo ezithile.
7. Amathrendi nokuqanjwa kwesikhathi esizayo:
Ucwaningo oluqhubekayo lugxile ekuthuthukisweni kokuphuma kokunye okuguquliwe kwe-HEC okunezakhiwo ezithuthukisiwe zezinhlelo ezithile zokusebenza.Kuphinde kugxilwe ekugxileni ekusungulweni okusimeme nezindlela zokukhiqiza ukuze kubhekwane nezindaba zemvelo kanye nokukhuthaza ezinye izindlela ezingayingeni imvelo.
IHydroxyethylcellulose (HEC) iyi-polymer eguquguqukayo, eguquguqukayo enezici ezihlukile njengokuncibilika kwamanzi, amandla okuqina, nokuzinza kwezinga lokushisa.Kusukela kumapende nama-coatings kuya ezimbonini zemithi nezokudla, i-HEC idlala indima ebalulekile ekuthuthukiseni ukusebenza kwemikhiqizo ehlukahlukene.Njengoba ucwaningo nentuthuko iqhubeka, i-HEC kungenzeka iqhubeke ibambe iqhaza elibalulekile ezimbonini ezihlukahlukene, ibe neqhaza ekuthuthukisweni kwezinto zokwakha kanye nokwakheka.
Isikhathi sokuthumela: Dec-29-2023