01. Izakhiwo ze-sodium carboxymethylcellulose
I-sodium carboxymethyl cellulose iyi-electrolyte ye-anionic polymer. Izinga lokushintshaniswa kwe-CMC yezentengiselwano lisukela ku-0.4 kuya ku-1.2. Kuye ngobumsulwa, ukubukeka kuyimpuphu emhlophe noma engabonakali kahle.
1. Ukujiya kwesisombululo
Ukuqina kwesixazululo samanzi se-CMC kuyanda ngokushesha ngokwanda kokuhlushwa, futhi isisombululo sinezici zokugeleza kwe-pseudoplastic. Izixazululo ezinezinga eliphansi lokushintsha (DS=0.4-0.7) zivame ukuba ne-thixotropy, futhi ukuqina okubonakalayo kuzoshintsha lapho kufakwa noma kususwa esixazululweni. Ukuqina kwesisombululo samanzi se-CMC kuyancipha ngokushisa okwandayo, futhi lo mphumela uyabuyiselwa lapho izinga lokushisa lingadluli ku-50 °C. Uma izinga lokushisa liphezulu isikhathi eside, i-CMC izowohloka. Yingakho i-bleed glaze kulula ukuyijika ibe mhlophe futhi iwohloke lapho kunyatheliswa i-thin line pattern bleed glaze.
I-CMC esetshenziselwa i-glaze kufanele ikhethe umkhiqizo onezinga eliphezulu lokufaka esikhundleni, ikakhulukazi i-glaze ephuma igazi.
2. Umphumela wenani le-pH ku-CMC
I-viscosity yesisombululo samanzi se-CMC ihlala ijwayelekile ebangeni elibanzi le-pH, futhi izinzile kakhulu phakathi kwe-pH 7 ne-9. Nge-pH
Inani liyancipha, bese i-CMC ishintsha kusuka efomini kasawoti iye efomini le-asidi, elingancibiliki emanzini futhi linciphe. Uma inani le-pH lingaphansi kuka-4, iningi lefomu kasawoti liphenduka libe yifomu le-asidi bese linciphe. Uma i-pH ingaphansi kuka-3, izinga lokushintsha lingaphansi kuka-0.5, futhi lingaguquka ngokuphelele kusuka efomini kasawoti liye efomini le-asidi. Inani le-pH lokuguqulwa okuphelele kwe-CMC enezinga eliphezulu lokushintsha (ngaphezu kuka-0.9) lingaphansi kuka-1. Ngakho-ke, zama ukusebenzisa i-CMC enezinga eliphezulu lokushintsha i-glaze yokugeleza kwamanzi.
3. Ubudlelwano phakathi kwe-CMC nama-ion ensimbi
Ama-ion ensimbi e-monovalent angakha usawoti oncibilika emanzini nge-CMC, okungeke kuthinte i-viscosity, ukucaca kanye nezinye izakhiwo zesisombululo samanzi, kodwa i-Ag+ iyinto ehlukile, ezokwenza ukuthi isisombululo sinciphe. Ama-ion ensimbi e-divalent, njenge-Ba2+, Fe2+, Pb2+, Sn2+, njll. abangela ukuthi isisombululo sinciphe; i-Ca2+, Mg2+, Mn2+, njll. ayinawo umthelela esixazululweni. Ama-ion ensimbi e-trivalent akha usawoti ongancibiliki nge-CMC, noma i-precipitate noma i-gel, ngakho-ke i-ferric chloride ayikwazi ukujiya nge-CMC.
Kukhona ukungaqiniseki ngomphumela wokubekezelela usawoti we-CMC:
(1) Kuhlobene nohlobo losawoti wensimbi, inani le-pH lesisombululo kanye nezinga lokufakwa esikhundleni kwe-CMC;
(2) Kuhlobene nohlelo lokuxuba kanye nendlela yokuxuba i-CMC nosawoti.
I-CMC enezinga eliphezulu lokushintshana ihambisana kangcono nosawoti, futhi umphumela wokwengeza usawoti esixazululweni se-CMC ungcono kunowomanzi anosawoti.
I-CMC ilungile. Ngakho-ke, uma ulungisa i-osmotic glaze, ngokuvamile ncibilikisa i-CMC emanzini kuqala, bese ufaka isixazululo sikasawoti se-osmotic.
02. Indlela yokubona i-CMC emakethe
Kuhlukaniswe ngobumsulwa
Izinga lokuhlanzeka okuphezulu — okuqukethwe kungaphezu kuka-99.5%;
Izinga elihlanzekile lezimboni — okuqukethwe kungaphezu kwama-96%;
Umkhiqizo ongahluziwe — okuqukethwe kungaphezu kuka-65%.
Kuhlukaniswe ngokwe-viscosity
Uhlobo lwe-viscosity ephezulu – i-viscosity yesisombululo esingu-1% ingaphezu kwama-Pa angu-5;
Uhlobo lwe-viscosity oluphakathi - i-viscosity yesisombululo esingu-2% ingaphezu kwama-Pa angu-5;
Uhlobo lwe-viscosity ephansi – i-viscosity yesisombululo esingu-2% ngaphezu kwama-0.05 Pa·s.
03. Incazelo yamamodeli avamile
Umenzi ngamunye unemodeli yakhe, kuthiwa kunezinhlobo ezingaphezu kuka-500. Imodeli evame kakhulu inezingxenye ezintathu: X—Y—Z.
Incwadi yokuqala imele ukusetshenziswa kwemboni:
F – izinga lokudla;
I——izinga lezimboni;
C - izinga le-ceramic;
O – izinga likaphethiloli.
Uhlamvu lwesibili lumelela izinga le-viscosity:
H – ukujiya okuphezulu
M——ukujiya okuphakathi
L – ukujiya okuphansi.
Uhlamvu lwesithathu lumelela izinga lokushintshana, futhi inombolo yalo ehlukaniswe ngo-10 yizinga langempela lokushintshana kwe-CMC.
Isibonelo:
Imodeli ye-CMC yi-FH9, okusho i-CMC enezinga lokudla, i-viscosity ephezulu kanye nezinga lokufaka esikhundleni elingu-0.9.
Imodeli ye-CMC yi-CM6, okusho ukuthi i-CMC yezinga le-ceramic, i-viscosity ephakathi nendawo kanye nezinga lokufaka esikhundleni elingu-0.6.
Ngokufanayo, kukhona nezinhlobo ezisetshenziswa kwezokwelapha, izindwangu kanye neminye imboni, ezingatholakali njalo ekusetshenzisweni kwemboni yobumba.
04. Izindinganiso Zokukhetha Imboni Ye-Ceramic
1. Ukuqina kokuqina
Lesi yisimo sokuqala sokukhetha i-CMC ye-glaze
(1) Ukuqina akushintshi kakhulu nganoma yisiphi isikhathi
(2) Ukuqina akushintshi kakhulu ngokushisa.
2. I-thixotropy encane
Ekukhiqizweni kwamathayela acwebezelayo, i-glaze slurry ayikwazi ukuba yi-thixotropic, ngaphandle kwalokho izothinta ikhwalithi yendawo ecwebezelayo, ngakho-ke kungcono ukukhetha i-CMC yezinga lokudla. Ukuze kuncishiswe izindleko, abanye abakhiqizi basebenzisa i-CMC yezinga lezimboni, futhi ikhwalithi ye-glaze ithinteka kalula.
3. Naka indlela yokuhlola i-viscosity
(1) Ukuhlushwa kwe-CMC kunobudlelwano obubonakalayo ne-viscosity, ngakho-ke kufanele kuqashelwe ukunemba kokulinganisa;
(2) Naka ukufana kwesisombululo se-CMC. Indlela yokuhlola eqinile iwukuxubha isixazululo amahora ama-2 ngaphambi kokulinganisa ukujiya kwaso;
(3) Izinga lokushisa linethonya elikhulu ekuqineni, ngakho-ke kufanele kunakwe izinga lokushisa elizungezile ngesikhathi sokuhlolwa;
(4) Naka ukulondolozwa kwesisombululo se-CMC ukuze uvimbele ukuwohloka kwaso.
(5) Naka umehluko phakathi kokunamathelana nokungaguquguquki.
Isikhathi sokuthunyelwe: Jan-05-2023