Ngokuqalwa kwepende, i-hydroxyyethyl cellulose (HEC) iyisidina esijwayelekile kanye nokushintsha okujwayelekile okungathuthukisa ukuqina kwesitoreji, ukuhlanganisa kanye nezakhiwo zokwakha zopende. Ukuze ungeze i-hydroxyethyl cellulose ukupenda futhi uqinisekise ukuthi isebenza ngempumelelo, izinyathelo ezithile nezinyathelo zokuphepha zidinga ukulandela. Inqubo ethile imi kanjena:
1. Izakhiwo ze-hydroxyethyl cellulose
I-Hydroxyyethyl celtulose iyi-polymer engenakuqhathaniswa yamanzi engenawo ama-ionic ngokuqina okuhle, ukwakha amafilimu, ukugcinwa kwamanzi, ukumiswa kanye nokumiswa kwezindawo ezikhuphukayo. Isetshenziswa kakhulu kupende osuselwa emanzini, anamathela, ama-ceramics, ama-inks neminye imikhiqizo. Itholakala esikhundleni sokufaka esikhundleni sengxenye yamaqembu e-hydroxyl kumaketanga ama-molecular angu-cellulose anamaqembu ama-hydroxyethyl, ngakho-ke ine-soubelity enhle yamanzi.
Imisebenzi esemqoka ye-HEC in Paints yile:
Umphumela Wokuqina
Ukumiswa Umphumela: Kungasakaza ngokulinganayo futhi uzwele izinhlayiya eziqinile njengezinhlamvu kanye nama-filler ukuze ubavimbele ekuxazululeni.
Umphumela Wezokugcina Amanzi
Ukulawulwa kweReology: Lungisa uketshezi futhi ulwele ukunamathela, futhi uthuthukise inkinga ye-Brush Mark ngesikhathi sokwakha.
2. Izinyathelo zokungeza ze-hydroxyethyl cellulose
Isinyathelo sangaphambi kokuchithwa ekusebenzeni kwangempela, i-Hydroxyyethyl celtulose idinga ukuhlakazeka ngokulinganayo futhi ichithwe ngenqubo yangaphambi kokuqothulwa. Ukuze uqinisekise ukuthi i-cellulose ingadlala ngokugcwele indima yayo, kuvame ukunconywa ukuyiqeda emanzini kuqala, kunokuba incishise ngqo kwinhlanganisela. Izinyathelo ezithile zinjengokulandelayo:
Khetha i-solvent efanelekile: Imvamisa amanzi asetshenziswayo asetshenziswa njenge-solvent. Uma kunezinye izixazululo ze-organic ohlelweni lwe-coating, izimo zokuqothula zidinga ukulungiswa ngokuya ngezakhiwo ze-solvent.
Shayela kancane i-Hydroxyethyl cellulose: kancane futhi ngokulinganayo ufafaza i-hydroxyethyyl cellulose powder ngenkathi uvusa amanzi ukuvikela i-agglomeration. Ijubane elishukumisayo kufanele liphuze ukugwema ukwehlisa izinga lokuchitheka kwe-cellulose noma ukwakha "ama-colloids" ngenxa yamandla we-shear ngokweqile.
Ukuyeka ukuchithwa: Ngemuva kokufafaza i-hydroxyyethyl cellulose, kudinga ukushiyelwa ukumela isikhathi esithile (imvamisa imizuzu engama-30 kuya kwamahora ambalwa) ukuqinisekisa ukuthi i-cellulose ivuvukele ngokuphelele futhi ichithwe emanzini. Isikhathi sokuchithwa sincike ohlotsheni lwe-cellulose, i-solvent lokushisa lokushisa kanye nezimo ezivusa amadlingozi.
Lungisa izinga lokuqothula: ukwandisa izinga lokushisa kusiza ukusheshisa inqubo yokuchithwa kwe-hydroxyethyl cellulose. Imvamisa inconyelwe ukulawula izinga lokushisa lesisombululo phakathi kuka-20 ℃ -40 ℃. Ukushisa okuphezulu kakhulu kungadala ukonakaliswa kweseli noma ukuwohloka kwesisombululo.
Ukulungisa Inani le-PH yekhambi The Solubity of Hydroxyethyl celtulose ihlobene kakhulu nenani lekhambi lesisombululo. Imvamisa incibilika kangcono ngaphansi kokungathathi hlangothi noma izimo ezincanyana ze-alkaline, ngenani le-PH phakathi kuka-6-8. Ngesikhathi sokuchithwa kwenqubo, inani le-PH lingashintshwa ngokungeza i-ammonia noma ezinye izinto ze-alkalia njengoba zidingeka.
Ukungeza isixazululo se-hydroxyyethyl celtulose solution ohlelweni lokuhlanganisa ngemuva kokuchithwa, engeza ikhambi ku-coating. Ngesikhathi senqubo yokwengeza, kufanele ifakwe kancane futhi ivuswe ngokuqhubekayo ukuze kuqinisekiswe ukuxuba okwenele ne-matrix ye-coatix. Ngesikhathi senqubo yokuxuba, kuyadingeka ukuthi ukhethe isivinini esifanelekile ngokwesistimu ehlukene ukuvikela uhlelo kusuka ku-Foaming noma ukucekelwa phansi kokonakalisa ngenxa yamandla we-shear ngokweqile.
Ukulungisa i-viscosity ngemuva kokungeza i-hydroxyethyl cellulose, i-viscosity ye-coating ingalawulwa ngokulungisa inani elingeziwe. Ngokuvamile, inani le-hydroxyethyl celtulose elisetshenzisiwe liphakathi kuka-0.3% -1.0% (okuhlobene nesisindo esiphelele se-coatical), kanye nenani elithile elengezwa ngezidingo zokuhlola ngokulandela izidingo zokwakheka. Kuphezulu kakhulu inani lokungezwa kungadala ukubambelela kube nokubonakala okuphezulu kakhulu nobubi, kuthinta ukusebenza kokwakha; Ngenkathi ukwengezwa okunganele kungenzeka kungakwazi ukudlala indima yokuqina nokumiswa.
Yenza izivivinyo zokuqina nokugcina ukungeza ngemuva kokungeza i-hydroxyethyl cellulose kanye nokushintsha ifomula yokuhlanganisa, ukusebenza kwe-coating yokwakha kudingeka kuhlolwe, kufaka phakathi izinga, njll. Ngasikhathi sinye, kudingeka Bheka ukudonswa kwemali ehlanganayo ngemuva kokuma isikhathi esithile, i-viscosity iyashintsha, njll., Ukuhlola ukuqina kwe-hydroxyethyl cellulose.
3. Ukuqapha
Vikela ukuhlangana: Ngesikhathi sokuchithwa, i-Hydroxyyethyl cellulose kulula kakhulu ukudonsa amanzi nokudumba, ngakho-ke kudinga ukufafazwa emanzini kancane futhi kuqinisekiswe ukuvuselelwa okwanele ukuvimbela ukwakheka kwezigaxa. Lesi isixhumanisi esibalulekile ekusebenzeni, ngaphandle kwalokho kungathinta izinga lokuchithwa kanye nokufana.
Gwema amandla aphezulu we-shear Ngaphezu kwalokho, ekukhiqizweni okulandelayo kwe-coation, ukusetshenziswa kwemishini ephezulu ye-shear kufanele futhi kugwenywe ngangokunokwenzeka.
Lawula izinga lokuvimbela izinguquko: lapho kuchithwa i-hydroxyethyyl cellulose, izinga lokushisa lamanzi akufanele liphezulu kakhulu. Ngokuvamile kunconyelwa ukuyilawula ngo-20 ℃ -40 ℃. Ngaphansi kwezimo zokushisa eziphakeme, i-cellulose ingahlehlisa, okuholela ekwehliseni umphumela wayo wokuqina nokuvuleka.
Isitoreji Solution: Izixazululo ze-Hydroxyyethyl celtulose ngokuvamile zidinga ukulungiswa futhi zisetshenziswe ngokushesha. Isitoreji sesikhathi eside sizothinta ukubonakala kwaso nokuqina kwaso. Ngokuvamile kunconyelwa ukulungiselela isisombululo esidingekayo ngosuku lokukhiqizwa kwepende ukuze kusebenze kahle.
Ukungezwa kwe-hydroxyyethyl celtule Ngesikhathi senqubo yokwengeza, naka isinyathelo sangaphambi kokuchithwa, ukulawulwa kwezinga lokulinganisa nenani le-PH, kanye nokuxuba okugcwele ngemuva kwalokho. Le mininingwane izothinta ngqo ikhwalithi nokuqina kokusebenza kopende.
Isikhathi Seposi: I-Sep-19-2024