Abstract:
IHydroxyethylcellulose (HEC) iyi-polymer eguquguqukayo enezinhlobonhlobo zezinhlelo zokusebenza kuzo zonke izimboni ezahlukahlukene, okunye ukusetshenziswa kwayo okubalulekile kusekwenzeni upende nokunamathela. Sihlola ukwakheka kwamakhemikhali e-HEC, izakhiwo zayo ze-rheological, nokuthi lezi zakhiwo zinikeza kanjani ukwakheka kwayo izinzuzo eziyingqayizivele.
ethula:
IHydroxyethylcellulose (HEC) iyi-polymer encibilika emanzini etholakala ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo. I-HEC inezakhiwo eziyingqayizivele ngenxa yesakhiwo sayo samakhemikhali, okwenza ibe yinhle ezinhlobonhlobo zezicelo zezimboni. Emhlabeni wamapende nama-coatings, i-HEC idlala indima ebalulekile ekuthuthukiseni izici ezimbalwa ezibalulekile ezifana nokulawula i-viscosity, ukugcinwa kwamanzi, ukwakheka kwefilimu nokuzinza okuphelele.
Isakhiwo samakhemikhali kanye nezakhiwo ze-rheological ze-HEC:
Ukuqonda ukwakheka kwamakhemikhali e-HEC kubalulekile ekuqondeni umsebenzi wayo kumapende namapende. I-HEC itholakala ku-cellulose ngochungechunge lwezinguquko zamakhemikhali ezethula amaqembu e-hydroxyethyl. Ukuba khona kwalawa maqembu kunikeza i-HEC ukuncibilika kwamanzi, okwenza kube nenzuzo enkulu ekwakhiweni okusekelwe emanzini.
Izici ze-rheological ze-HEC, ikakhulukazi ikhono layo lokujiya, zibalulekile ekwakhiweni kwe-coating. I-HEC isebenza njenge-rheology modifier, ethinta ukuziphatha kokugeleza kanye ne-viscosity ye-coating. Lesi sakhiwo sibalulekile ukuze kuvinjwe ukulungiswa kwe-pigment, ukuqinisekisa ngisho nokusetshenziswa kanye nokukhuthaza ukumbozwa okufanele uma kusetshenziswa ibhulashi noma i-roller.
Ukusetshenziswa kwe-HEC ku-coatings esekwe emanzini:
Izindwangu ezisekelwe emanzini zibhekwa njengenani eliphansi lomthelela wazo wemvelo kanye nokuqukethwe okuphansi kwe-volatile organic compound (VOC). I-HEC idlala indima ebalulekile kulezi zakhiwo ngokuhlinzeka ngokuzinza, ukuqina nokulawulwa kwe-rheology. I-polymer isiza ukuvimbela ukwakheka kwe-pigment ngesikhathi sokulondoloza, iqinisekisa ukubukeka okungaguquki, futhi ithuthukisa ukusebenza kukonke kukapende. Ukwengeza, i-HEC isiza ukunweba isikhathi esivulekile, ngaleyo ndlela yandise isikhathi sokufaka isicelo ngaphambi kokuba upende lome.
Izicelo ze-HEC kuma-solvent-based coatings:
Nakuba izindwangu ezisekelwe emanzini zihambisana nemvelo, ukwakheka okusekelwe ku-solvent kusavame ukusetshenziswa kwezinye izinhlelo zokusebenza. Ukuhambisana kwe-HEC namanzi nezincibilikisi kwenza kube ukukhetha okuguquguqukayo kokumbozwa okusekelwe ku-solvent. Kulezi zakhiwo, i-HEC isebenza njengesibopho, esiza ekwakhiweni kwefilimu nokunamathela. Ikhono layo lokugcina i-viscosity phezu kwebanga lokushisa libalulekile kumasistimu asekelwe ku-solvent, ukuqinisekisa ukusebenza kwesicelo okuzinzile nokungaguquki.
I-Powder coating kanye ne-HEC:
Izembatho zempushana zithandwa ngenxa yokuqina kwazo, ubungane bemvelo, kanye nokusetshenziswa kalula. Ukwengeza i-HEC ku-powder coatings kuthuthukisa ukugeleza kwazo kanye nezakhiwo zokulinganisa. I-polymer isiza ukulawula i-rheology ye-powder coatings, iqinisekisa ifilimu ebushelelezi, efanayo ngesikhathi sokufaka isicelo. Ukuncibilika kwamanzi kwe-HEC kunenzuzo enqubweni yokukhiqiza ye-powder coatings, inikeza indlela elula yokuhlanganisa i-polymer ekubunjweni.
I-HEC njenge-stabilizer kanye ne-ejenti yokugcina amanzi:
Ngaphezu kwendima yayo njengesilungisi se-rheology kanye ne-binder, i-HEC isebenza njengesizinzisi esisebenzayo ekwenziweni kopende nokwemboza. I-polymer isiza ukuvimbela ukuhlukaniswa kwesigaba kanye nemvula, okunomthelela ekuzinzeni komkhiqizo wesikhathi eside. Ukwengeza, i-HEC isebenza njenge-ejenti yokugcina amanzi, inciphisa ukulahlekelwa umswakama ngesikhathi sokumisa. Lokhu kubaluleke kakhulu ukuze kuqinisekiswe ukwakheka kwefilimu efanele, ukunamathela kanye nokuqina kokugqoka.
Ekuphetheni:
IHydroxyethylcellulose (HEC) iyisithako esisebenziseka ngezindlela eziningi futhi esibalulekile kumapende nasezimbotsheni. Inhlanganisela yayo eyingqayizivele yokuncibilika kwamanzi, ukulawulwa kwe-rheology, izakhiwo zefilimu kanye nokuzinza okuthuthukisiwe kwenza kube isithasiselo esibalulekile ezinhlobonhlobo zokubunjwa. Kusukela ekugcotshweni okusekelwe emanzini kuya ekuhlanganiseni okusekelwe ku-solvent kanye nokwakhiwa kwempushana, i-HEC idlala indima ehlukahlukene ekuthuthukiseni ukusebenza nokuqinisekisa ikhwalithi yokugcina yomkhiqizo. Njengoba isidingo sezinto zokumboza ezinobungani bemvelo nokusebenza okuphezulu siqhubeka sikhuphuka, ukusetshenziswa kwe-HEC kungenzeka kwande, kuqinise ngokwengeziwe isikhundla sayo esibalulekile embonini yokumboza.
Isikhathi sokuthumela: Nov-28-2023