I-Hydroxyethyl cellulose (HEC) iyi-ether engeyona ionic cellulose encibilika emanzini. Isetshenziswa kakhulu emigqumeni esekelwe emanzini ngenxa yokuqina kwayo okuhle, i-emulsifying, ukwakheka kwefilimu kanye nezakhiwo zokumisa. Njengokuqina nokuqiniswa kwezingubo, i-HEC ingathuthukisa kakhulu izakhiwo ze-rheological kanye nokupenda kwezingubo.
1. Imisebenzi esemqoka ye-hydroxyethyl cellulose
Ezimbotsheni ezisekelwe emanzini, imisebenzi eyinhloko ye-HEC ibonakala kulezi zici ezilandelayo:
Ukuqina komphumela: I-HEC inekhono eliqinile lokuqina, elingathuthukisa ngempumelelo i-viscosity kanye nekhono lokumiswa lezingubo ezisekelwe emanzini futhi kuvimbele ama-pigments nama-filler e-coating ekuzinzeni.
Thuthukisa i-rheology: I-HEC ingakwazi ukulungisa i-fluidity emigqonyeni esekelwe emanzini ukuze ibonise i-viscosity ephansi ngaphansi kwe-shear ephezulu, okwenza kube lula ukusabalalisa lapho kupenda, ngenkathi ibonisa i-viscosity ephakeme ngaphansi kwezimo ezimile, ngaleyo ndlela inciphisa ukugeleza kopende. umkhuba olengayo.
Ukuzinza okuthuthukisiwe: I-HEC inokumelana okuhle kweqhwa kanye nokuzinza kwesitoreji, okunganweba impilo yeshalofu yezingubo zokugqoka futhi iqinisekise ukuzinza ezindaweni ezahlukene.
Thuthukisa izici zokwenza ifilimu: I-HEC yenza ifilimu eguquguqukayo ngemva kokuba upende lomile, ithuthukise ukunamathela nokumelana nokugqoka kwefilimu kapende futhi ithuthukise ukusebenza kokuvikela kopende.
2. Isetshenziswa kanjani i-HEC
Uma usebenzisa i-HEC emigqonyeni esekelwe emanzini, izindlela zokuhlakazeka nezindlela zokuhlakaza nezindlela zokwengeza ngokuqondile zivame ukusetshenziswa. Okulandelayo yizinyathelo ezithile nezindlela zokusetshenziswa:
() 1. Ukwelashwa ngaphambi kokuhlakazwa kwe-HEC
I-HEC iyimpushana okunzima ukuyihlakaza ngokuqondile futhi yenza kalula ama-clumps emanzini. Ngakho-ke, ngaphambi kokwengeza i-HEC, kunconywa ukuthi uyihlakaze kusengaphambili. Izinyathelo ezijwayelekile zimi kanje:
Govuza futhi uhlakaze: Kancane kancane engeza i-HEC emanzini ngaphansi kokunyakaziswa kwesivinini esiphansi ukuze ugweme ukwakheka kwama-clumps. Inani le-HEC elingeziwe kufanele lilungiswe ngokuvumelana nezidingo ze-viscosity ze-coating, ngokuvamile kubalwa ku-0.3% -1% wefomula ephelele.
Vimbela i-caking: Uma ungeza i-HEC, inani elincane lama-anti-caking agents, njenge-ethanol, i-propylene glycol, njll, lingangezwa emanzini ukuze i-HEC powder ihlakazeke ngokulinganayo futhi inciphise amathuba okuba ne-caking.
(2). Indlela yokusabalalisa kanye nokuqedwa
Indlela yokuhlakazeka nokuhlakazeka iwukuncibilikisa i-HEC ngokwehlukana ibe uketshezi lwe-viscous phakathi nenqubo yokulungisa upende, bese uyifaka kupende. Izinyathelo eziqondile zimi kanje:
Inqubo yokuqedwa: I-HEC inzima ukuchithwa emazingeni okushisa avamile noma aphansi, ngakho-ke amanzi angashiswa ngokufanele ukuze afinyelele izinga lokushisa lika-30-40 ° C ukusheshisa ukuqedwa kwe-HEC.
Isikhathi sokuvuselela: I-HEC incibilika kancane futhi ngokuvamile idinga ukugoqa amahora angu-0.5-2 ize incibilike ngokuphelele ibe uketshezi lwe-viscous olusobala noma oluguquguqukayo.
Lungisa inani le-pH: Ngemva kokuthi i-HEC ichithekile, inani le-pH lesisombululo lingashintshwa ngokuvumelana nezidingo, ngokuvamile phakathi kwe-7-9, ukuze kuthuthukiswe ukuzinza kwe-coating.
(3). Indlela yokwengeza eqondile
Indlela yokwengeza eqondile iwukwengeza i-HEC ngokuqondile ohlelweni lokugqoka ngesikhathi senqubo yokukhiqiza ukugqoka, okulungele ukumbozwa ngezidingo ezikhethekile zenqubo. Sicela unake amaphuzu alandelayo lapho usebenza:
Yomisa kuqala bese umanzi: EngezaI-HECengxenyeni eyomile kapende osekelwe emanzini kuqala, uyixube ngokulinganayo nezinye izimpushana, bese wengeza izingxenye zamanzi nezamanzi ukuze ugweme ukuhlangana.
Ukulawulwa kwe-Shear: Uma ungeza i-HEC ekugqokeni, kuyadingeka ukusebenzisa imishini yokuxuba ephezulu ye-shear, njenge-disperser high-speed, ukuze i-HEC ihlakazeke ngokulinganayo ngesikhathi esifushane futhi ifinyelele i-viscosity edingekayo.
3. Ukulawulwa komthamo we-HEC
Ezingxenyeni ezisekelwe emanzini, inani le-HEC kufanele lilawulwe ngokuvumelana nezidingo zangempela zokugqoka. I-HEC eningi kakhulu izobangela ukuthi i-viscosity yokugqoka ibe phezulu kakhulu futhi ithinte ukusebenza; I-HEC encane kakhulu ingase ingawufezi umphumela olindelekile wokujiya. Ngaphansi kwezimo ezijwayelekile, umthamo we-HEC ulawulwa ku-0.3% -1% wefomula ephelele, futhi ingxenye ethile ingalungiswa ngokuhlolwa.
4. Izinyathelo zokuqapha ze-HEC ezinhlobonhlobo ezisekelwe emanzini
Gwema i-agglomeration: I-HEC ijwayele ukunqwabelana emanzini, ngakho-ke lapho uyengeza, yengeze kancane kancane, ihlakaze ngokulinganayo, futhi ugweme ukuxubana komoya ngangokunokwenzeka.
Izinga lokushisa lokuqedwa: I-HEC incibilika ngokushesha emazingeni okushisa aphezulu, kodwa izinga lokushisa akufanele lidlule i-50 ° C, ngaphandle kwalokho i-viscosity yayo ingathinteka.
Izimo ezishukumisayo: Ukugqugquzeleka okuqhubekayo kuyadingeka phakathi nenqubo yokuhlakazwa kwe-HEC, futhi iziqukathi ezinezivalo kufanele zisetshenziswe ngangokunokwenzeka ukuze kuvinjelwe ukungcola okuvela ekungcoleni kwangaphandle kanye nokuhwamuka kwamanzi.
Ukulungiswa kwenani le-pH: I-viscosity ye-HEC izokhula ngaphansi kwezimo ze-alkaline, ngakho-ke inani le-pH lesisombululo lidinga ukulungiswa ngokunengqondo ukuze kuvinjwe ukusebenza kwe-coating ekunciphiseni ngenxa ye-pH eyeqile.
Ukuhlolwa kokuhambisana: Lapho kwakhiwa amafomula amasha, ukusetshenziswa kwe-HEC kufanele kuhlolelwe ukuhambisana namanye ama-thickeners, ama-emulsifiers, njll. ukuze kuqinisekiswe ukuthi akukho ukusabela okubi okuzokwenzeka.
5. Izibonelo zohlelo lokusebenza lwe-HEC ekugqokeni okusekelwe emanzini
I-HEC ingasetshenziswa njenge-thickener kukho kokubili odongeni lwangaphakathi olusekelwe emanzini kanye nezingubo zodonga zangaphandle ezisekelwe emanzini. Ngokwesibonelo:
Upende ongaphakathi odongeni lwangaphakathi osuselwe emanzini: I-HEC isetshenziselwa ukuthuthukisa izici zokulinganisa zikapende, ukwenza uhlelo lokusebenza lube bushelelezi futhi lulingane, futhi kuncishiswe amamaki ebhulashi.
Indwangu yodonga lwangaphandle olusekelwe emanzini: I-HEC ingathuthukisa ukumelana ne-sag kanye nokumelana nesimo sezulu se-coating futhi igweme ukulimala kwefilimu yokumboza okubangelwa ukuguguleka kwemvula.
Ukusetshenziswa kwe-HEC emanzini asekelwe emanzini akukwazi nje ukuthuthukisa ukusebenza kokwakhiwa kokugqoka, kodwa futhi kuthuthukise ikhwalithi ebonakalayo nokuqina kwefilimu yokugqoka. Ekusetshenzisweni okusebenzayo, ngokuya ngezidingo ezithile zokumboza, indlela yokuhlakaza kanye nenani lokwengeza le-HEC likhethwa ngokufanelekile, futhi kuhlanganiswe nokulungiswa kwezinye izinto zokusetshenziswa, imiphumela yekhwalithi ephezulu ingafinyelelwa.
Isikhathi sokuthumela: Nov-10-2024