Cov Yam Cuam Tshuam rau Sodium carboxymethylcellulose Viscosity

Qhov viscosity ntawm sodium carboxymethylcellulose (CMC) cov kua muaj ntau yam cuam tshuam. Nov yog qee yam tseem ceeb uas cuam tshuam rau qhov viscosity ntawm CMC cov kua:

1. Kev Ntsuas: Feem ntau, qhov viscosity ntawm CMC cov kua yuav nce ntxiv nrog rau qhov kev ntsuas ntxiv. Qhov ntau dua ntawm CMC ua rau muaj ntau cov saw polymer hauv cov kua, ua rau muaj kev sib txuas ntawm cov molecular ntau dua thiab viscosity ntau dua. Txawm li cas los xij, feem ntau muaj qhov txwv rau qhov viscosity nce ntxiv ntawm qhov kev ntsuas ntau dua vim yog cov yam xws li kev sib xyaw ntawm cov kua thiab kev sib cuam tshuam ntawm polymer-solvent.
2. Qib Kev Hloov Chaw (DS): Qib kev hloov chaw yog hais txog tus lej nruab nrab ntawm cov carboxymethyl pawg ib chav glucose hauv cov saw cellulose. CMC nrog DS siab dua feem ntau muaj viscosity siab dua vim nws muaj cov pab pawg them ntau dua, uas txhawb kev sib cuam tshuam ntawm cov molecular muaj zog dua thiab tiv taus kev ntws ntau dua.
3. Qhov Hnyav Molecular: Qhov hnyav molecular ntawm CMC tuaj yeem cuam tshuam rau nws qhov viscosity. Qhov hnyav molecular siab dua CMC feem ntau ua rau cov tshuaj viscosity siab dua vim yog qhov nce ntxiv ntawm cov saw hlau thiab cov saw polymer ntev dua. Txawm li cas los xij, qhov hnyav molecular siab dhau CMC kuj tseem tuaj yeem ua rau cov tshuaj viscosity nce ntxiv yam tsis muaj kev nce ntxiv ntawm kev ua haujlwm tuab.
4. Kub: Kub muaj feem cuam tshuam loj rau qhov viscosity ntawm CMC cov tshuaj. Feem ntau, viscosity txo qis thaum kub nce vim yog txo qis kev sib cuam tshuam ntawm polymer-solvent thiab nce molecular mobility. Txawm li cas los xij, qhov cuam tshuam ntawm kub rau viscosity tuaj yeem sib txawv nyob ntawm cov yam xws li polymer concentration, molecular weight, thiab solution pH.
5. pH: Lub pH ntawm CMC kua tuaj yeem cuam tshuam nws cov viscosity vim yog kev hloov pauv hauv polymer ionization thiab conformation. CMC feem ntau yog viscous ntau dua ntawm cov nqi pH siab dua vim tias cov carboxymethyl pawg yog ionized, ua rau muaj zog electrostatic repulsions ntawm cov saw polymer. Txawm li cas los xij, cov xwm txheej pH siab heev tuaj yeem ua rau muaj kev hloov pauv hauv polymer solubility thiab conformation, uas yuav cuam tshuam rau viscosity sib txawv nyob ntawm qib CMC thiab formulation.
6. Cov Ntshav: Qhov muaj ntsev nyob rau hauv cov tshuaj tuaj yeem cuam tshuam rau qhov viscosity ntawm CMC cov tshuaj los ntawm cov teebmeem ntawm kev sib cuam tshuam ntawm polymer-solvent thiab kev sib cuam tshuam ntawm ion-polymer. Hauv qee kis, kev ntxiv ntsev tuaj yeem ua rau viscosity ntau ntxiv los ntawm kev tshuaj ntsuam xyuas electrostatic repulsions ntawm cov saw polymer, thaum lwm qhov xwm txheej, nws tuaj yeem txo qhov viscosity los ntawm kev cuam tshuam kev sib cuam tshuam ntawm polymer-solvent thiab txhawb kev sib sau ua ke ntawm polymer.
7. Tus Nqi Txiav: Qhov viscosity ntawm CMC cov tshuaj kuj tseem tuaj yeem nyob ntawm tus nqi txiav lossis tus nqi uas kev ntxhov siab siv rau cov tshuaj. CMC cov tshuaj feem ntau ua rau muaj tus cwj pwm txiav-thinning, qhov twg viscosity txo qis nrog kev nce tus nqi txiav vim yog kev sib phim thiab kev taw qhia ntawm cov saw polymer raws li kev ntws. Qhov ntau thiab tsawg ntawm kev txiav thinning tuaj yeem sib txawv nyob ntawm cov yam xws li polymer concentration, molecular hnyav, thiab pH kua.

Qhov viscosity ntawm sodium carboxymethylcellulose cov tshuaj yog cuam tshuam los ntawm kev sib xyaw ua ke ntawm cov yam xws li concentration, degree of substitution, molecular weight, temperature, pH, salt content, thiab shear rate. Kev nkag siab txog cov yam no yog qhov tseem ceeb rau kev ua kom zoo dua qhov viscosity ntawm CMC cov tshuaj rau cov ntawv thov tshwj xeeb hauv kev lag luam xws li zaub mov, tshuaj, tshuaj pleev ib ce, thiab kev saib xyuas tus kheej.