01. Iipropati ze-sodium carboxymethylcellulose
I-sodium carboxymethyl cellulose yi-anionic polymer electrolyte. Umgangatho wokutshintshwa kwe-CMC yorhwebo ukusuka kwi-0.4 ukuya kwi-1.2. Ngokuxhomekeke ekuhlambulukeni, ukubonakala kumhlophe okanye umgubo omhlophe.
1. I-viscosity yesisombululo
I-viscosity yesisombululo samanzi se-CMC inyuka ngokukhawuleza ngokunyuka koxinzelelo, kwaye isisombululo sineempawu zokuhamba kwe-pseudoplastic. Izisombululo ezinomgangatho ophantsi wokutshintshwa (DS=0.4-0.7) zihlala zine-thixotropy, kwaye i-viscosity ebonakalayo iya kutshintsha xa kuchetywa kusetyenziswe okanye kususwe kwisisombululo. I-viscosity yesisombululo samanzi se-CMC siyancipha ngokunyuka kwamaqondo obushushu, kwaye esi siphumo sibuyiselwa umva xa ubushushu bungagqithi kuma-50 °C. Kwiqondo lokushisa eliphezulu ixesha elide, i-CMC iya kuthotywa. Esi sizathu sokuba i-glaze eyophayo kulula ukuyijika ibe mhlophe kwaye ibe mbi xa uprinta ipateni yomgca obhityileyo wopha i-glaze.
I-CMC esetyenziselwa i-glaze kufuneka ikhethe imveliso enezinga eliphezulu lokutshintshwa, ngakumbi i-glaze eyophayo.
2. Isiphumo sexabiso le-pH kwi-CMC
I-viscosity yesisombululo se-CMC samanzi sihlala siqhelekileyo kuluhlu olubanzi lwe-pH, kwaye luzinzile kakhulu phakathi kwe-pH 7 kunye ne-9.
Ixabiso liyancipha, kwaye i-CMC ijika kwifom yetyuwa ukuya kwifom ye-asidi, enganyibilikiyo emanzini kunye ne-precipitates. Xa ixabiso le-pH lingaphantsi kwe-4, ininzi yefom yetyuwa ijika ibe yifom ye-asidi kunye ne-precipitates. Xa i-pH ingaphantsi kwe-3, i-degree of substitution ingaphantsi kwe-0.5, kwaye inokuguqula ngokupheleleyo kwifom yetyuwa ukuya kwifom ye-asidi. Ixabiso le-pH lokuguqulwa okupheleleyo kwe-CMC kunye neqondo eliphezulu lokutshintshwa (ngaphezulu kwe-0.9) lingaphantsi kwe-1. Ngoko ke, zama ukusebenzisa i-CMC ngeqondo eliphezulu lokutshintshwa kwe-glaze ye-seepage.
3. Ubudlelwane phakathi kweCMC kunye neeyoni zetsimbi
I-ional metal ions inokwenza i-salts e-soluble yamanzi kunye ne-CMC, engayi kuchaphazela i-viscosity, i-transparency kunye nezinye iipropati zesisombululo se-aqueous, kodwa i-Ag + ihlukile, eya kubangela ukuba isisombululo siphephe. I-ion zetsimbi ezidibeneyo, ezifana ne-Ba2 +, i-Fe2 +, i-Pb2 +, i-Sn2 +, njl. I-Ca2 +, i-Mg2 +, i-Mn2 +, njl. ayinayo impembelelo kwisisombululo. Iiyoni zesinyithi ezithathu zenza iityuwa ezinganyibilikiyo nge-CMC, okanye imvula okanye ijeli, ngoko ke ichloride yeferric ayinako ukujiya ngeCMC.
Kukho ukungaqiniseki kwisiphumo sokunyamezela ityuwa ye-CMC:
(1) Inxulumene nohlobo lwetyuwa yesinyithi, ixabiso le-pH lesisombululo kunye nomgangatho wokutshintshwa kweCMC;
(2) Inxulumene nomyalelo wokuxuba kunye nendlela ye-CMC kunye netyuwa.
I-CMC eneqondo eliphezulu lokutshintshela inokuhambelana ngcono neetyuwa, kwaye umphumo wokongeza ityuwa kwisisombululo se-CMC ungcono kunamanzi etyuwa.
I-CMC ilungile. Ke ngoko, xa ulungiselela i-osmotic glaze, nyibilikisa ngokubanzi i-CMC emanzini kuqala, kwaye emva koko wongeze isisombululo setyuwa ye-osmotic.
02. Indlela yokuqaphela i-CMC kwimarike
Ihlelwa ngobunyulu
Ibakala eliphezulu lokucoceka — umxholo ungaphezu kwama-99.5%;
I-Industrial grade pure - umxholo ungaphezulu kwe-96%;
Imveliso ekrwada — umxholo ungaphezulu kwama-65%.
Ihlelwe yi-viscosity
Uhlobo oluphezulu lwe-viscosity - i-1% isisombululo se-viscosity singaphezulu kwe-5 Pa s;
Uhlobo oluphakathi lwe-viscosity - i-viscosity ye-2% isisombululo ingaphezulu kwe-5 Pa;
Uhlobo oluphantsi lwe-viscosity - i-2% isisombululo se-viscosity ngaphezu kwe-0.05 Pa · s.
03. Inkcazo yeemodeli eziqhelekileyo
Umenzi ngamnye unemodeli yakhe, kuthiwa kukho iintlobo ezingaphezu kwama-500. Owona mzekelo uqhelekileyo unamacandelo amathathu: X—Y—Z.
Ileta yokuqala imele ukusetyenziswa kweshishini:
F - ibakala lokutya;
I——ibakala loshishino;
C - ibakala le-ceramic;
O - ibakala lepetroleum.
Ileta yesibini imele inqanaba le-viscosity:
H - i-viscosity ephezulu
M——i-viscosity ephakathi
L - i-viscosity ephantsi.
Ileta yesithathu imele iqondo lokutshintshwa, kwaye inani layo lahlulwe ngo-10 liqondo lokwenene lokuthatha indawo ye-CMC.
Umzekelo:
Imodeli ye-CMC yi-FH9, oku kuthetha ukuba i-CMC enebakala lokutya, i-viscosity ephezulu kunye ne-substitution degree ye-0.9.
Imodeli ye-CMC yi-CM6, oku kuthetha ukuba i-CMC yebakala le-ceramic, i-viscosity ephakathi kunye ne-substitution degree ye-0.6.
Ngokuhambelanayo, kukwakho amabakala asetyenziswa kumayeza, amalaphu kunye namanye amashishini, angafane adibane nawo ekusetyenzisweni koshishino lweceramic.
04. ImiGangatho yokuKhetha ishishini leCeramic
1. Ukuzinza kwe-Viscosity
Le yimeko yokuqala yokukhetha i-CMC ye-glaze
(1) I-Viscosity ayitshintshi kakhulu nangaliphi na ixesha
(2) I-Viscosity ayitshintshi kakhulu ngeqondo lokushisa.
2. I-thixotropy encinci
Kwimveliso yeetayile ezicwebezelayo, i-glaze slurry ayikwazi ukuba yithixotropic, ngaphandle koko iya kuchaphazela umgangatho we-glazed surface, ngoko ke kungcono ukhethe i-CMC yokutya. Ukuze kuncitshiswe iindleko, abanye abavelisi basebenzisa i-industrial-grade CMC, kwaye umgangatho we-glaze uchaphazeleka ngokulula.
3. Nika ingqalelo kwindlela yokuvavanya i-viscosity
(1) Ugxininiso lweCMC lunobudlelwane obucacileyo kunye ne-viscosity, ngoko kufuneka kuqwalaselwe ukuchaneka kokulinganisa;
(2) Nika ingqalelo ukufana kwesisombululo seCMC. Indlela yokuvavanya engqongqo kukuvuselela isisombululo kwiiyure ezi-2 ngaphambi kokulinganisa i-viscosity yayo;
(3) Ubushushu bunempembelelo enkulu kwi-viscosity, ngoko ke ingqwalasela kufuneka ihlawulwe kwiqondo lokushisa eliphantsi ngexesha lovavanyo;
(4) Nika ingqalelo ukugcinwa kwesisombululo seCMC ukuthintela ukuwohloka kwayo.
(5) Nika ingqalelo kumahluko phakathi kwe-viscosity kunye nokuhambelana.
Ixesha lokuposa: Jan-05-2023