Kev ntsuam xyuas cov viscosity ntawm cov zaub mov-qib sodium carboxymethyl cellulose (CMC) yog ib qho tseem ceeb rau kev ua kom nws cov kev ua haujlwm thiab kev ua tau zoo hauv ntau daim ntawv thov zaub mov. Kev ntsuas viscosity pab cov tuam txhab txiav txim siab lub peev xwm thickening thiab stabilizing ntawm CMC cov kev daws teeb meem, uas yog qhov tseem ceeb rau kev ua tiav cov khoom zoo xws li kev ntxhib los mos, qhov ncauj qhov ntswg, thiab kev ruaj ntseg. Nov yog cov lus qhia dav dav rau txoj kev kuaj cov zaub mov-qib sodium CMC viscosity:

1. Txoj Cai:

• Viscosity yog ib qho kev ntsuas ntawm cov kua dej tsis kam ntws. Nyob rau hauv cov ntaub ntawv ntawm CMC kev daws teeb meem, viscosity yog cuam tshuam los ntawm tej yam xws li polymer concentration, degree ntawm hloov (DS), molecular hnyav, pH, kub, thiab shear npaum li cas.
• Lub viscosity ntawm CMC cov kev daws teeb meem feem ntau yog ntsuas los ntawm kev siv lub viscometer, uas siv cov kev ntxhov siab shear rau cov kua thiab ntsuas qhov tshwm sim deformation lossis ntws tus nqi.

2. Khoom siv thiab Reagents:

• Khoom noj khoom haus qib sodium carboxymethyl cellulose (CMC) qauv.
• Cov dej distilled.
• Viscometer (xws li Brookfield viscometer, rotational lossis capillary viscometer).
• Spindle tsim nyog rau qhov viscosity ntau ntawm cov qauv.
• Cov dej kub tswj dej da dej los yog cov thermostatic chamber.
• Stirrer los yog magnetic stirrer.
• Beakers los yog khob khob.
• Stopwatch los yog timer.

3. Cov txheej txheem:

1. Kev npaj ua qauv:
   • Npaj cov kev daws teeb meem CMC nrog ntau qhov sib txawv (piv txwv li, 0.5%, 1%, 2%, 3%) hauv dej distilled. Siv qhov sib npaug los ntsuas qhov tsim nyog ntawm CMC hmoov thiab ntxiv nws maj mam rau hauv dej nrog nplawm kom ntseeg tau tias muaj kev tawg tag.
   • Tso cai rau CMC cov kev daws teeb meem kom hydrate thiab sib npaug rau lub sijhawm txaus (piv txwv li, 24 teev) kom ntseeg tau tias dej tsis sib xws thiab ruaj khov.
2. Instrument Teeb:
   • Calibrate lub viscometer raws li cov chaw tsim khoom cov lus qhia siv tus qauv viscosity reference kua.
   • Teem lub viscometer rau qhov tsim nyog ceev los yog shear npaum li cas rau qhov xav tau viscosity ntawm CMC cov kev daws teeb meem.
   • Preheat lub viscometer thiab ntxaiv mus rau qhov ntsuas kub uas xav tau siv lub ntsuas kub tswj dej da dej lossis chav ntsuas cua sov.
3. Kev ntsuas:
   • Sau cov qauv khob los yog beaker nrog cov tshuaj CMC los kuaj, xyuas kom meej tias cov ntxaiv yog tag nrho rau hauv cov qauv.
   • Txo cov spindle rau hauv cov qauv, saib xyuas kom tsis txhob muaj cua npuas.
   • Pib lub viscometer thiab tso cai rau lub spindle tig ntawm qhov ceev los yog shear npaum li cas rau lub sij hawm predetermined (piv txwv li, 1 feeb) kom ncav cuag ib tug khov kho-lub xeev.
   • Sau cov viscosity nyeem ntawv tso rau ntawm lub viscometer. Rov ua qhov ntsuas rau txhua qhov kev daws teeb meem CMC thiab ntawm qhov sib txawv ntawm qhov sib txawv yog tias tsim nyog.
4. Kev txheeb xyuas cov ntaub ntawv:
   • Lub phiaj xwm viscosity qhov tseem ceeb tiv thaiv CMC concentration lossis shear tus nqi los tsim cov viscosity nkhaus.
   • Xam cov viscosity pom tseeb ntawm cov nqi shear tshwj xeeb lossis cov concentrations rau kev sib piv thiab kev tshuaj xyuas.
   • Txiav txim siab tus cwj pwm rheological ntawm CMC cov kev daws teeb meem (xws li Newtonian, pseudoplastic, thixotropic) raws li cov duab ntawm cov viscosity nkhaus thiab cov nyhuv ntawm shear npaum li cas ntawm viscosity.
5. Txhais lus:
   • Cov viscosity siab dua qhia tau tias muaj kev tiv thaiv ntau dua rau kev ntws thiab muaj zog thickening zog ntawm cov tshuaj CMC.
   • Tus cwj pwm viscosity ntawm CMC cov kev daws teeb meem tuaj yeem sib txawv nyob ntawm cov yam ntxwv xws li concentration, kub, pH, thiab shear rate. Kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev ua kom CMC kev ua tau zoo hauv cov ntawv thov zaub mov tshwj xeeb.

4. Kev txiav txim siab:

• Xyuas kom zoo calibration thiab tu lub viscometer kom raug thiab txhim khu kev qha ntsuas.
• Tswj cov kev kuaj mob (piv txwv li, qhov kub thiab txias, shear rate) kom txo qis qhov sib txawv thiab xyuas kom muaj cov txiaj ntsig rov ua dua tshiab.
• Txheeb xyuas cov txheej txheem siv cov qauv siv los yog kev sib piv nrog rau lwm txoj kev siv tau.
• Ua ntsuas viscosity ntawm ntau lub ntsiab lus raws li kev ua haujlwm lossis kev cia khoom los ntsuas kev ruaj ntseg thiab tsim nyog rau cov ntawv thov.

Los ntawm kev ua raws li txoj kev ntsuas no, viscosity ntawm cov zaub mov qib sodium carboxymethyl cellulose (CMC) cov kev daws teeb meem tuaj yeem txiav txim siab kom raug, muab cov ntaub ntawv tseem ceeb rau kev tsim, kev tswj kom zoo, thiab kev ua kom zoo tshaj plaws hauv kev lag luam khoom noj.