IHydroxyethylcellulose (HEC) iyi-polymer engeyona i-ionic, encibilika emanzini etholakala ku-cellulose.Isakhiwo sayo samakhemikhali esiyingqayizivele kanye nezakhiwo kuyenza ibe isithako esisebenza ngezindlela eziningi esisetshenziswa ngezindlela ezahlukahlukene kuzo zonke izimboni ezifana nemithi, izimonyo, ukudla, nokunakekela komuntu siqu.Esinye sezici zayo eziphawulekayo izici zayo ezinhle kakhulu zokulengiswa, ezidlala indima ebalulekile ekwenziweni okuningi.
Isakhiwo kanye Nezakhiwo ze-HEC
I-HEC isuselwa ku-cellulose, okuyi-polymer eyenzeka ngokwemvelo etholakala ezindongeni zamaseli ezitshalo.Ngochungechunge lokusabela kwamakhemikhali, amaqembu e-hydroxyethyl ethulwa kumgogodla we-cellulose, okuholela ku-polymer encibilika emanzini enezici ezihlukile.
Isakhiwo Sekhemikhali: Isakhiwo esiyisisekelo se-cellulose siqukethe amayunithi eglucose aphindaphindayo axhunywe ndawonye ngamabhondi e-β-1,4-glycosidic.Ku-HEC, amanye amaqembu e-hydroxyl (-OH) kumayunithi e-glucose athathelwa indawo amaqembu e-hydroxyethyl (-OCH2CH2OH).Lokhu kushintsha kunikeza ukuncibilika kwamanzi ku-polymer kuyilapho kugcinwa umgogodla wesakhiwo se-cellulose.
Ukunyibilika Kwamanzi: I-HEC incibilika kakhulu emanzini, yakha izixazululo ezicacile, ezibukekayo.I-degree of substitution (DS), ekhombisa inani elimaphakathi lamaqembu e-hydroxyethyl ngeyunithi ngayinye ye-glucose, ithonya ukunyibilika kwe-polymer nezinye izici.Amanani aphezulu e-DS ngokuvamile aphumela ekuncibilikeni okukhulu kwamanzi.
I-Viscosity: Izixazululo ze-HEC zibonisa ukuziphatha kwe-pseudoplastic, okusho ukuthi i-viscosity yabo iyancipha ngaphansi kwengcindezi ye-shear.Lesi sakhiwo sinenzuzo ezinhlelweni ezinjengama-coatings nama-adhesives, lapho impahla idinga ukugeleza kalula ngesikhathi sokufaka isicelo kodwa igcine i-viscosity lapho iphumule.
Ukwakhiwa Kwefilimu: I-HEC ingakha amafilimu asobala, aguquguqukayo lapho omisiwe, okuwenza afanelekele ukusetshenziswa njenge-ejenti yokwenza ifilimu ezinhlelweni ezihlukahlukene.
Ukumiswa kwezakhiwo ze-HEC
Ukumiswa kusho ikhono lempahla eqinile ukuthi ihlale ihlakazeke ngokulinganayo endaweni ewuketshezi ngaphandle kokuzinza ngokuhamba kwesikhathi.I-HEC ibonisa izakhiwo ezinhle kakhulu zokumiswa ngenxa yezizathu eziningana:
I-Hydration kanye Nokuvuvukala: Uma izinhlayiya ze-HEC zihlakazwa endaweni ewuketshezi, zimanzisa futhi zikhukhumale, zenze inethiwekhi enezinhlangothi ezintathu ezicupha futhi zimise izinhlayiya eziqinile.Imvelo ye-hydrophilic ye-HEC yenza kube lula ukutholwa kwamanzi, okuholela ekwandeni kwe-viscosity kanye nokuzinza okuthuthukisiwe kokumiswa.
Ukusabalalisa Usayizi Wezinhlayiyana: I-HEC ingamisa ngempumelelo ububanzi obubanzi bezinhlayiyana ngenxa yekhono layo lokwakha inethiwekhi enosayizi abahlukahlukene be-mesh.Lokhu kuguquguquka kuyenza ifanelekele ukumisa izinhlayiya ezinhle nezimaholo ekwakhiweni okuhlukahlukene.
Ukuziphatha Kothixotropic: Izixazululo ze-HEC zibonisa ukuziphatha kwe-thixotropic, okusho ukuthi i-viscosity yabo iyancipha ngokuhamba kwesikhathi ngaphansi kwengcindezi ye-shear eqhubekayo futhi ilulama lapho ukucindezeleka kususwa.Lesi sakhiwo sivumela ukuthululwa okulula nokusebenzisa ngenkathi kugcinwa ukuzinza nokumiswa kwezinhlayiya eziqinile.
I-pH Ukuzinza: I-HEC izinzile phezu kohlu olubanzi lwamanani e-pH, okuyenza ifanelekele ukusetshenziswa ekwakhiweni kwe-acidic, neutral, kanye ne-alkaline ngaphandle kokuphazamisa izici zayo zokumiswa.
Izicelo ze-HEC Ekwenzeni Ukumiswa
Izakhiwo ezinhle kakhulu zokumiswa ze-HEC ziyenza ibe yisithako esibalulekile emikhiqizweni eminingi kuzo zonke izimboni ezahlukene:
Amapende nama-Coatings: I-HEC isetshenziswa njenge-ejenti yokuqina kanye ne-ejenti elengayo kumapende asekelwe emanzini kanye nama-coatings ukuvimbela ukuhlanzwa kombala nezithasiselo.Ukuziphatha kwayo kwe-pseudoplastic kusiza ukusetshenziswa okushelelayo nokumbozwa okufanayo.
Imikhiqizo Yokunakekelwa Komuntu Siqu: Kumashampu, ukuwasha umzimba, neminye imikhiqizo yokunakekela komuntu siqu, i-HEC isiza ukumisa izithako zezinhlayiya ezifana nama-exfoliants, ama-pigments, nobuhlalu bephunga elimnandi, iqinisekisa ngisho nokusatshalaliswa nokuzinza kokubunjwa.
Ukwakhiwa Kwemithi: I-HEC isetshenziswa ekumisweni kwemithi ukuze kumiswe izithako ezisebenzayo futhi kuthuthukiswe ukunambitheka nokuqina kwamafomu omthamo woketshezi lomlomo.Ukuhambisana kwayo nohlu olubanzi lwama-API (Izithako Zemithi Ezisebenzayo) kanye nezisizayo kuyenza ibe ukukhetha okuncanyelwayo kwabaqulunqi.
Imikhiqizo Yokudla Nesiphuzo: I-HEC isetshenziswa ekusetshenzisweni kokudla okufana nezingubo zesaladi, amasoso, neziphuzo ukuze kumiswe izithako ezingancibiliki njengamakhambi, izinongo, nama-pulp.Imvelo yayo engenaphunga futhi engenambitheki iyenza ilungele ukusetshenziswa ekwakhiweni kokudla ngaphandle kokuthikameze izinzwa zezinzwa.
IHydroxyethylcellulose (HEC) iyi-polymer eguquguqukayo enezici ezihlukile zokulengisa, okuyenza ibe isithako esibalulekile ezinhlobonhlobo zokwakheka kuzo zonke izimboni.Ikhono layo lokumisa izinhlayiya eziqinile ngokulinganayo kumidiya ewuketshezi, kuhlanganiswe nezinye izici ezifiselekayo njengokuncibilika kwamanzi, isilawuli se-viscosity, kanye nokuzinza kwe-pH, kuyenza ibaluleke kakhulu kubadidiyeli abafuna ukuzuza imikhiqizo ezinzile nesezingeni eliphezulu.Njengoba imizamo yocwaningo nentuthuko iqhubeka nokuthuthuka, ukusetshenziswa kwe-HEC ekwakhiweni kokumiswa kulindeleke ukuthi kwande ngokuqhubekayo, kuqhubekisele phambili ukuqanjwa kabusha kanye nokuthuthukisa ukusebenza komkhiqizo emikhakheni eyahlukene.
Isikhathi sokuthumela: May-09-2024