Izembatho eziphuma emanzini ziya ngokuya zibaluleke kakhulu emakethe yezingubo zanamuhla ngenxa yezindawo zazo ezinobungani bemvelo kanye nokukhishwa kwe-organic volatile organic compound (VOC). Kodwa-ke, uma kuqhathaniswa nezingubo zendabuko ezisekelwe ku-solvent, ukumbozwa kwamanzi kuvame ukubhekana nezinselele mayelana nokwakhiwa kwefilimu nokunamathela. Ukuze kuxazululwe lezi zinkinga, ezinye izithasiselo ezisebenzayo ngokuvamile ziyengezwa ekwakhiweni. IHydroxyethyl cellulose (HEC) ingenye yezinto eziwugqinsi ezisetshenziswa kakhulu kanye nezithasiselo ezisebenzayo, ezidlala indima ebalulekile ekuthuthukiseni ukwakheka kwefilimu nokunamathela kokunamathela emanzini.
1. Izakhiwo eziyisisekelo ze-hydroxyethyl cellulose (HEC)
I-HEC iyi-polymer engancibiliki emanzini engeyona i-ionic etholwe ngokuguqulwa kwamakhemikhali kwe-cellulose yemvelo. Isakhiwo sayo samangqamuzana siqukethe inani elikhulu lamaqembu e-hydroxyethyl, okwenza kube nokuncibilika kwamanzi okuhle kanye nezakhiwo zefilimu. Izici eziyinhloko ze-HEC zifaka:
Ukuqina komphumela: I-HEC ingakhuphula ngokuphumelelayo i-viscosity yezingubo zamanzi, ibanike i-rheology engcono nokuzinza ngesikhathi sokugqoka.
Impahla yokwenza ifilimu: I-HEC ingakha ifilimu efanayo ngesikhathi sokumisa inqubo yokumboza, ithuthukise izakhiwo ezibonakalayo zokugqoka.
Ukuhambisana: I-HEC inokuhambisana okuhle nezinhlobonhlobo zama-resin asekelwe emanzini kanye ne-pigment, futhi ayithambekele ekungazinzini kwefomula noma ukuhlukaniswa.
2. Indlela ye-HEC ekuthuthukiseni izakhiwo zokwenza ifilimu kuma-coatings asekelwe emanzini
I-HEC ingathuthukisa kakhulu izakhiwo zokwenza ifilimu emigqonyeni esekwe emanzini, ikakhulukazi ngenxa yesakhiwo sayo esiyingqayizivele samangqamuzana kanye nezakhiwo zomzimba namakhemikhali.
Ukuxhumanisa ngokomzimba kwamaketanga wamangqamuzana: Amaketanga e-HEC ama-molecular made futhi ayavumelana nezimo. Phakathi nenqubo yokomisa yokumboza, la maketanga e-molecular angabambana ukuze enze inethiwekhi yokuxhumanisa ngokomzimba, okwandisa amandla emishini kanye nokuguquguquka kokugqoka.
Ukulawula umswakama: I-HEC inokugcinwa kwamanzi okuhle futhi ingakhulula kancane kancane umswakama ngesikhathi senqubo yokomisa yokugqoka, ukwandisa isikhathi sokwenza ifilimu, okuvumela ukuthi ukugqoka kwakhiwe ngokulinganayo, nokunciphisa ukuqhekeka nokuncipha okubangelwa isivinini sokumisa ngokushesha.
Ukulawulwa kokuqina kobuso: I-HEC inganciphisa ngokuphumelelayo ukungezwani okungaphezulu kwezingubo ezisekelwe emanzini, ikhuthaze ukumanzisa nokusabalalisa kwezigqoko ebusweni be-substrate, futhi ithuthukise ukufana nokushaya kwengubo.
3. Indlela ye-HEC ekuthuthukiseni ukunamathela kuma-coatings asekelwe emanzini
I-HEC ingaphinde ithuthukise ngokuphawulekayo ukunamathela kwezingubo ezisekelwe emanzini, okuboniswa ikakhulukazi kulezi zici ezilandelayo:
Ukuthuthukiswa kwesixhumi esibonakalayo: Ukusabalalisa okufanayo kwe-HEC ekuhlanganiseni kungakhuphula indawo yokuxhumana phakathi kokumboza nendawo engaphansi kwe-substrate futhi kuthuthukise amandla okubopha okuhlangene. Iketango layo lamangqamuzana lingahlangana nezingxenye ezincane ze-concave kanye ne-convex ye-substrate ukuze kuthuthukiswe ukunamathela ngokomzimba.
Ukuhambisana kwamakhemikhali: I-HEC i-polymer engeyona i-ionic enokuhambisana okuhle kwamakhemikhali nezinhlobonhlobo ze-substrates (njengensimbi, ukhuni, ipulasitiki, njll.), futhi akulula ukubangela ukusabela kwamakhemikhali noma izinkinga zokuhambisana kobuso, ngaleyo ndlela kuthuthukiswe ukunamathela.
Umphumela we-Plasticizing: I-HEC ingadlala indima ethile yokwenza i-plasticizing enqubweni yokomisa yokugqoka, okwenza ukunamathela kuguquguquke, ukuze kukwazi ukuzivumelanisa kangcono nokuguquguquka okuncane kanye nokwanda okushisayo kanye nokufingqa kwendawo engaphansi, futhi kunciphise ukuxebuka nokuqhekeka. kwe-coating.
4. Izibonelo zohlelo lokusebenza kanye nemiphumela ye-HEC
Ekusetshenzisweni okungokoqobo, i-HEC isetshenziswa kabanzi ezinhlotsheni ezihlukahlukene zokwakheka kokugqoka okusekelwe emanzini, njengezingubo zezakhiwo ezisekelwe emanzini, izindwangu zokhuni ezisekelwe emanzini, izigqoko zezimboni ezisekelwe emanzini, njll. Ngokungeza inani elifanele le-HEC, ukwakhiwa. ukusebenza kwe-coating kanye nekhwalithi yefilimu yokugcina yokugqoka ingathuthukiswa kakhulu.
Izingubo zezakhiwo ezisuselwe emanzini: Kupende osuselwe emanzini nopende bodonga bangaphandle, ukwengeza i-HEC kungathuthukisa ngokuphumelelayo ukusebenza kokuginqika nokuxubha, kwenze okokunamathela kube lula futhi nefilimu yokumboza ibe umfaniswano futhi bushelelezi. Ngesikhathi esifanayo, ukugcinwa kwamanzi kwe-HEC kungase futhi kuvimbele ukuqhekeka kwefilimu yokugcoba okubangelwa ukoma ngokushesha.
Upende wokhuni osuselwe emanzini: Kupende wokhuni osekelwe emanzini, izici ze-HEC ezijiyayo zokwenza ifilimu zisiza ukuthuthukisa ukucaca nokucaba kwefilimu kapende, okwenza indawo yokhuni ibe yinhle kakhulu futhi ibe ngokwemvelo. Ngaphezu kwalokho, i-HEC ingathuthukisa ukumelana kwamanzi nokumelana kwamakhemikhali kwefilimu yokugqoka futhi ithuthukise umphumela wokuvikela wokhuni.
Izingubo zezimboni ezisekelwe emanzini: Emigqeni yensimbi esekelwe emanzini kanye ne-anti-corrosion, ukuthuthukiswa kokunamathela kwe-HEC kuvumela ifilimu yokunamathisela ukuthi ibambelele kangcono endaweni yensimbi, ithuthukise ukusebenza kwe-anti-corrosion kanye nempilo yesevisi.
Njengesengezo esibalulekile esisebenzayo, i-hydroxyethyl cellulose (HEC) ithuthukisa ngokuphawulekayo ukusebenza okuphelele kwe-coating emanzini asekelwe emanzini ngokuthuthukisa izakhiwo zefilimu kanye nokunamathela. Ukuqina kwayo, ukugcinwa kwamanzi, ukwakheka kwefilimu kanye nemiphumela yokuthuthukisa isixhumi esibonakalayo kuvumela ukujiya okusekelwe emanzini ukuthi kusebenze kahle ezimeni ezihlukahlukene zohlelo lokusebenza, ngaleyo ndlela kuhlangatshezwane nesidingo semakethe sokusebenza okuphezulu, okuhambisana nemvelo. Esikhathini esizayo, ngokuthuthukiswa okuqhubekayo kokuvikelwa kwemvelo kanye nezidingo zokusebenza, amathemba okufaka isicelo e-HEC emigqonyeni esekwe emanzini azoba banzi.
Isikhathi sokuthumela: Jul-12-2024