Ekwenziweni kopende, i-hydroxyethyl cellulose (HEC) iyisiguquli esivamile sokujiya nesiguquli se-rheology esingathuthukisa ukuzinza kwesitoreji, ukulinganisa kanye nezakhiwo zokwakha zikapende. Ukuze wengeze i-hydroxyethyl cellulose kumapende futhi uqinisekise ukuthi isebenza ngempumelelo, izinyathelo ezithile nezinyathelo zokuphepha kufanele zilandelwe. Inqubo ethize imi kanje:
1. Izakhiwo ze-hydroxyethyl cellulose
I-Hydroxyethyl cellulose iyi-polymer engancibiliki emanzini engeyona i-ionic enokuqina okuhle kakhulu, ukwakheka kwefilimu, ukugcina amanzi, ukumiswa kanye nezakhiwo ze-emulsifying. Kuvame ukusetshenziswa kumapende asekelwe emanzini, izinamathiselo, izitsha zobumba, iziyinki neminye imikhiqizo. Itholakala ngokufaka esikhundleni ingxenye yamaqembu e-hydroxyl ochungechungeni lwamangqamuzana e-cellulose ngamaqembu e-hydroxyethyl, ngakho inokuncibilika okuhle kwamanzi.
Imisebenzi esemqoka ye-HEC kumapende yile:
Ukuqina komphumela: Khulisa i-viscosity kapende, vimbela upende ukuthi unganciphisi, futhi ulenze libe nezakhiwo ezinhle kakhulu zokwakha.
Umthelela wokumisa: Ingahlakaza ngokulinganayo futhi izinze izinhlayiya eziqinile ezifana ne-pigment nama-filler ukuze zingazinzisi.
Umthelela wokugcina amanzi: Thuthukisa ukugcinwa kwamanzi kwefilimu yokuhlanganisa, wandise isikhathi esivulekile, futhi uthuthukise umphumela wokumanzisa kapende.
Ukulawula i-Rheology: lungisa uketshezi kanye nokulingana kwento enamathelayo, futhi uthuthukise inkinga yophawu lwebhulashi phakathi nokwakhiwa.
2. Izinyathelo zokwengeza ze-hydroxyethyl cellulose
Isinyathelo sokuhlakazwa kwangaphambili Ekusebenzeni kwangempela, i-hydroxyethyl cellulose idinga ukuhlakazwa ngokulinganayo futhi incibilikiswe ngenqubo yangaphambi kokuhlakazwa. Ukuze kuqinisekiswe ukuthi i-cellulose ingakwazi ukudlala indima yayo ngokugcwele, ngokuvamile kunconywa ukuyiqeda emanzini kuqala, kunokuba uyifake ngokuqondile embozweni. Izinyathelo eziqondile zimi kanje:
Khetha i-solvent efanelekile: ngokuvamile amanzi ase-deionized asetshenziswa njenge-solvent. Uma kukhona ezinye i-solvents eziphilayo ohlelweni lokugqoka, izimo zokuhlakazeka zidinga ukulungiswa ngokuvumelana nezakhiwo ze-solvent.
Fafaza kancane i-hydroxyethyl cellulose: Fafaza kancane futhi ngokulinganayo i-hydroxyethyl cellulose powder ngenkathi ugqugquzela amanzi ukuze uvimbele ukuhlangana. Isivinini esishukumisayo kufanele sihambe kancane ukuze sigweme ukwehlisa izinga lokuqedwa kwe-cellulose noma ukwakha "ama-colloid" ngenxa yamandla amaningi okugunda.
Ukuncibilika okumile: Ngemva kokufafaza i-hydroxyethyl cellulose, idinga ukushiywa ukuze ime isikhathi esithile (imvamisa imizuzu engama-30 kuya emahoreni ambalwa) ukuze kuqinisekiswe ukuthi i-cellulose ivuvukele ngokuphelele futhi incibilike emanzini. Isikhathi sokuchithwa sincike ohlotsheni lwe-cellulose, izinga lokushisa le-solvent kanye nezimo ezinyakazayo.
Lungisa izinga lokushisa lokuncibilika: Ukwenyusa izinga lokushisa kusiza ukusheshisa inqubo yokuqedwa kwe-hydroxyethyl cellulose. Ngokuvamile kunconywa ukulawula izinga lokushisa lesisombululo phakathi kuka-20℃-40℃. Izinga lokushisa eliphezulu kakhulu lingabangela ukuwohloka kwe-cellulose noma ukonakala kwesixazululo.
Ukulungisa inani le-pH lesixazululo Ukuncibilika kwe-hydroxyethyl cellulose kuhlobene eduze nenani le-pH lesixazululo. Ngokuvamile incibilika kangcono ngaphansi kwezimo ezingathathi hlangothi noma ezine-alkaline kancane, ngenani le-pH eliphakathi kuka-6-8. Ngesikhathi senqubo yokuchithwa, inani le-pH lingashintshwa ngokungeza i-ammonia noma ezinye izinto ezine-alkali njengoba kudingeka.
Ukwengeza isixazululo se-hydroxyethyl cellulose ohlelweni lokumboza Ngemva kokuqedwa, engeza isisombululo ku-coating. Phakathi nenqubo yokwengeza, kufanele yengezwe kancane futhi inyakaziswa ngokuqhubekayo ukuze kuqinisekiswe ukuxuba okwanele ne-matrix yokumboza. Phakathi nenqubo yokuxuba, kuyadingeka ukukhetha isivinini esishukumisayo esifanele ngokuvumelana nezinhlelo ezihlukene zokuvimbela uhlelo ukuba lungabi namagwebu noma ukuwohloka kwe-cellulose ngenxa yamandla amaningi okugunda.
Ukulungisa i-viscosity Ngemva kokwengeza i-hydroxyethyl cellulose, i-viscosity ye-coating ingalawulwa ngokulungisa inani elingeziwe. Ngokuvamile, inani le-hydroxyethyl cellulose elisetshenzisiwe liphakathi kuka-0.3% -1.0% (ngokuhlobene nesisindo esiphelele se-coating), futhi inani elithile elingeziwe lidinga ukulungiswa ngokuhlolwa ngokuya ngezidingo zokwakheka kwentolo. Ukwengeza okuphezulu kakhulu kungabangela ukumboza ukuthi kube ne-viscosity ephezulu kakhulu kanye ne-fluidity embi, okuthinta ukusebenza kokwakhiwa; kuyilapho ukungezwa okwanele kungase kungakwazi ukudlala indima yokuqina nokumiswa.
Yenza izivivinyo zokuqina kweleveli nokugcinwa kwesitoreji Ngemva kokwengeza i-hydroxyethyl cellulose nokulungisa ifomula yokwemboza, ukusebenza kokwakha okunamathelayo kudinga ukuhlolwa, okuhlanganisa ukubeka izinga, ukucwila, ukulawula uphawu lwebhulashi, njll. Ngesikhathi esifanayo, ukuhlolwa kokuqina kwesitoreji sokumboza kuyadingeka ukuze bheka ukucwiliswa kwe-coating ngemva kokuma isikhathi esithile, ukushintsha kwe-viscosity, njll, ukuhlola ukuzinza kwe-hydroxyethyl cellulose.
3. Izinyathelo zokuqapha
Vimbela i-agglomeration: Ngesikhathi senqubo yokuncibilika, i-hydroxyethyl cellulose kulula kakhulu ukumunca amanzi futhi ikhukhumale, ngakho idinga ukufafazwa emanzini kancane futhi iqinisekise ukunyakaziswa okwanele ukuvimbela ukwakheka kwezigaxa. Lesi isixhumanisi esiyinhloko ekusebenzeni, ngaphandle kwalokho singase sithinte izinga lokuqedwa nokufana.
Gwema amandla aphezulu okugunda: Uma wengeza i-cellulose, isivinini esishukumisayo akufanele sibe phezulu kakhulu ukuze ugweme ukulimaza iketanga lamangqamuzana e-cellulose ngenxa yamandla amaningi okugunda, okuholela ekwehleni kokuqiniswa kwawo. Ngaphezu kwalokho, ekukhiqizeni okunamathelayo okulandelayo, ukusetshenziswa kwemishini ephezulu yokugunda kufanele futhi kugwenywe ngangokunokwenzeka.
Lawula izinga lokushisa lokuncibilika: Lapho uncibilikisa i-hydroxyethyl cellulose, izinga lokushisa lamanzi akufanele libe phezulu kakhulu. Ngokuvamile kunconywa ukuyilawula ku-20 ℃-40 ℃. Ngaphansi kwezimo zokushisa eziphakeme, i-cellulose ingase ihlehlise, okuholela ekunciphiseni komphumela wayo wokuqina kanye ne-viscosity.
Ukugcinwa kwesixazululo: Izixazululo ze-Hydroxyethyl cellulose ngokuvamile zidinga ukulungiswa futhi zisetshenziswe ngokushesha. Isitoreji sesikhathi eside sizothinta i-viscosity yayo nokuzinza. Ngokuvamile kunconywa ukulungisa isisombululo esidingekayo ngosuku lokukhiqiza upende ukuze kugcinwe ukusebenza kwayo okuhle kakhulu.
Ukwengezwa kwe-hydroxyethyl cellulose kupende akuyona nje inqubo elula yokuxuba ngokomzimba, kodwa futhi kudingeka kuhlanganiswe nezidingo zangempela zenqubo kanye nokucaciswa kokusebenza ukuze kuqinisekiswe ukuthi ukuqina kwayo, ukumiswa nokugcinwa kwamanzi izakhiwo zisetshenziswa ngokugcwele. Phakathi nenqubo yokwengeza, naka isinyathelo sangaphambi kokuhlakazwa, ukulawulwa kwezinga lokushisa lokuqedwa kanye nenani le-pH, kanye nokuxuba okugcwele ngemva kokwengeza. Le mininingwane izothinta ngqo ikhwalithi nokuzinza kokusebenza kopende.
Isikhathi sokuthumela: Sep-19-2024