Rheological Property ntawm Methyl Cellulose Solution

Cov khoom rheological ntawm methylcellulose (MC) cov kev daws teeb meem yog qhov tseem ceeb rau kev nkag siab nws tus cwj pwm thiab kev ua haujlwm hauv ntau yam kev siv. Lub rheology ntawm ib yam khoom yog hais txog nws cov ntws thiab deformation yam ntxwv nyob rau hauv kev nyuaj siab los yog strain. Cov khoom rheological ntawm MC cov kev daws teeb meem tuaj yeem cuam tshuam los ntawm ntau yam xws li concentration, kub, pH, thiab qib kev hloov pauv.

viscosity

Viscosity yog ib qho tseem ceeb tshaj plaws rheological zog ntawm MC kev daws teeb meem. MC yog cov khoom uas muaj kuab heev uas tuaj yeem tsim cov tshuaj tuab thaum yaj hauv dej. Lub viscosity ntawm MC cov ntsiab lus yog nyob ntawm qhov concentration ntawm cov tshuaj, qhov degree ntawm kev hloov, thiab qhov kub thiab txias. Qhov siab dua qhov concentration ntawm cov tshuaj, qhov viscosity ntawm cov tshuaj ntau dua. Qhov degree ntawm kev hloov pauv kuj cuam tshuam rau viscosity ntawm MC cov kev daws teeb meem. MC nrog rau qib siab dua ntawm kev hloov pauv muaj qhov viscosity ntau dua piv rau MC nrog qib qis ntawm kev hloov pauv. Qhov kub kuj tseem tuaj yeem cuam tshuam qhov viscosity ntawm MC cov kev daws teeb meem. Lub viscosity ntawm MC cov kev daws teeb meem txo nrog qhov kub thiab txias.

Shear Thinning Cwj Pwm

MC cov kev daws teeb meem nthuav tawm tus cwj pwm shear-thinning, uas txhais tau hais tias lawv cov viscosity txo qis hauv kev ntxhov siab. Thaum cov kev ntxhov siab shear yog siv rau kev daws teeb meem MC, viscosity txo qis, tso cai rau cov tshuaj ntws yooj yim dua. Cov cuab yeej no yog ib qho tseem ceeb hauv cov ntawv thov uas cov tshuaj yuav tsum tau ntws yooj yim thaum lub sij hawm ua, tab sis kuj yuav tsum tau tswj nws cov thickness thiab stability thaum so.

Kev coj cwj pwm

MC cov kev daws teeb meem tuaj yeem raug gelation thaum rhuab saum ib qho kub. Cov cuab yeej no yog nyob ntawm qhov kev hloov pauv ntawm MC. MC nrog rau qib siab dua ntawm kev hloov pauv muaj qhov kub thiab txias dua piv rau MC nrog qhov qis dua ntawm kev hloov pauv. Tus cwj pwm gelation ntawm MC cov kev daws teeb meem yog qhov tseem ceeb hauv kev siv xws li kev tsim cov gels, jellies, thiab khoom qab zib.

Thixotropy

MC cov kev daws teeb meem nthuav tawm tus cwj pwm thixotropic, uas txhais tau tias lawv cov viscosity txo qis thaum lub sijhawm so. Thaum muaj kev nyuaj siab shear rau cov tshuaj, cov viscosity nce.