1. Molecular qauv
Cov qauv molecular ntawm sodium carboxymethyl cellulose (CMC) muaj kev txiav txim siab ntawm nws cov solubility hauv dej. CMC yog ib qho derivative ntawm cellulose, thiab nws cov yam ntxwv feature yog hais tias cov hydroxyl pawg ntawm cov cellulose saw yog ib feem los yog kiag li hloov los ntawm carboxymethyl pawg. Qhov degree ntawm kev hloov pauv (DS) yog qhov tseem ceeb, uas qhia txog qhov nruab nrab ntawm cov pawg hydroxyl hloov los ntawm pawg carboxymethyl ntawm txhua chav tsev piam thaj. Qhov siab dua qhov kev hloov pauv, qhov muaj zog hydrophilicity ntawm CMC, thiab ntau dua qhov solubility. Txawm li cas los xij, kev hloov pauv ntau dhau kuj tseem tuaj yeem ua rau muaj kev cuam tshuam zoo ntawm cov molecules, uas ua rau txo cov solubility. Yog li ntawd, lub degree ntawm kev hloov pauv yog proportional rau lub solubility nyob rau hauv ib tug tej yam ntau yam.
2. Molecular hnyav
Qhov hnyav molecular ntawm CMC cuam tshuam rau nws cov solubility. Feem ntau, qhov me me ntawm qhov hnyav molecular, qhov solubility ntau dua. Qhov hnyav molecular CMC muaj cov saw ntev thiab nyuaj molecular, uas ua rau muaj kev cuam tshuam ntau ntxiv thiab kev sib cuam tshuam hauv kev daws teeb meem, txwv tsis pub nws solubility. Qhov hnyav molecular CMC ntau dua yuav tsim kev sib cuam tshuam zoo nrog dej molecules, yog li txhim kho solubility.
3. Kub
Qhov kub thiab txias yog qhov tseem ceeb cuam tshuam rau kev solubility ntawm CMC. Feem ntau, qhov kub thiab txias nce qhov solubility ntawm CMC. Qhov no yog vim tias qhov kub siab dua ua rau lub zog kinetic ntawm cov dej molecules, yog li rhuav tshem cov hydrogen bonds thiab van der Waals rog ntawm CMC molecules, ua kom yooj yim rau yaj hauv dej. Txawm li cas los xij, qhov kub thiab txias heev tuaj yeem ua rau CMC decompose lossis denature, uas tsis tsim nyog rau kev tawg.
4. tus nqi pH
CMC solubility kuj muaj qhov tseem ceeb nyob ntawm pH ntawm cov tshuaj. Hauv qhov nruab nrab lossis alkaline ib puag ncig, pawg carboxyl hauv CMC molecules yuav ionize rau COO⁻ ions, ua rau CMC molecules tsis zoo, yog li txhim kho kev sib cuam tshuam nrog dej molecules thiab txhim kho solubility. Txawm li cas los xij, nyob rau hauv cov xwm txheej muaj zog acidic, ionization ntawm pawg carboxyl yog inhibited thiab solubility yuav txo. Tsis tas li ntawd, huab cua pH yuav ua rau CMC degradation, yog li cuam tshuam rau nws cov solubility.
5. Ionic zog
Lub zog ionic hauv dej cuam tshuam rau solubility ntawm CMC. Kev daws teeb meem nrog lub zog ionic siab tuaj yeem ua rau kev txhim kho hluav taws xob nruab nrab ntawm CMC molecules, txo nws cov solubility. Cov nyhuv salting yog ib qho tshwm sim, qhov ntau dua ion concentrations txo cov solubility ntawm CMC hauv dej. Tsawg ionic zog feem ntau pab CMC yaj.
6. Dej hardness
Dej hardness, feem ntau txiav txim los ntawm cov concentration ntawm calcium thiab magnesium ions, kuj cuam tshuam rau solubility ntawm CMC. Multivalent cations nyob rau hauv cov dej nyuaj (xws li Ca²⁺ thiab Mg²⁺) tuaj yeem tsim ionic txuas nrog cov carboxyl pawg hauv CMC molecules, uas ua rau molecular aggregation thiab txo solubility. Nyob rau hauv sib piv, cov dej mos yog haum rau tag nrho cov dissolution ntawm CMC.
7. Kev ntxhov siab
Agitation pab CMC yaj hauv dej. Kev ntxhov siab nce qhov chaw ntawm kev sib cuag ntawm cov dej thiab CMC, txhawb txoj kev tawg. Kev txaus siab txaus tuaj yeem tiv thaiv CMC los ntawm agglomerating thiab pab kom nws sib cais sib npaug hauv dej, yog li ua kom cov dej solubility.
8. Cia thiab tuav tej yam kev mob
Kev cia thiab tuav cov xwm txheej ntawm CMC kuj cuam tshuam rau nws cov khoom solubility. Cov yam ntxwv xws li av noo, kub, thiab lub sijhawm cia tuaj yeem cuam tshuam rau lub cev lub cev thiab cov khoom siv tshuaj lom neeg ntawm CMC, yog li cuam tshuam rau nws cov solubility. Yuav kom tswj tau qhov zoo solubility ntawm CMC, nws yuav tsum tau zam los ntawm lub sij hawm ntev raug kub thiab high humidity, thiab lub ntim yuav tsum tau khaws cia zoo kaw.
9. Cov nyhuv ntawm additives
Ntxiv lwm yam tshuaj, xws li cov khoom siv solubility los yog solubilizers, thaum lub sij hawm dissolution txheej txheem CMC tuaj yeem hloov nws cov khoom solubility. Piv txwv li, qee cov surfactants los yog dej-soluble organic solvents tuaj yeem ua rau kom cov solubility ntawm CMC los ntawm kev hloov qhov nro ntawm cov tshuaj los yog cov polarity ntawm nruab nrab. Tsis tas li ntawd, qee qhov tshwj xeeb ions lossis tshuaj lom neeg tuaj yeem cuam tshuam nrog CMC molecules los tsim cov soluble complexes, yog li txhim kho solubility.
Cov yam ntxwv uas cuam tshuam rau qhov siab tshaj plaws solubility ntawm sodium carboxymethyl cellulose (CMC) nyob rau hauv dej muaj xws li nws cov qauv molecular, molecular hnyav, kub, pH nqi, ionic zog, dej hardness, stirring tej yam kev mob, cia thiab tuav tej yam kev mob, thiab lub zog ntawm additives. Cov yam tseem ceeb no yuav tsum tau txiav txim siab ua tiav hauv kev siv tswv yim txhawm rau txhim kho kev solubility ntawm CMC thiab ua tau raws li cov kev cai tshwj xeeb. Kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev siv thiab tuav CMC thiab pab txhim kho nws daim ntawv thov cuam tshuam hauv ntau yam haujlwm.
Post lub sij hawm: Lub Xya hli ntuj-10-2024