Tshawb xyuas cov kev coj ua tsis ncaj ncees thiab viscosity ntawm cov ntaub ntawv HPMC

Taw qhia:
HydroxyPropyyl methylcellueculose (HPMC) yog siv cov polymer rau ntau yam kev lag luam vim nws lub peev xwm ua yeeb yam zoo li muaj peev xwm, thiab muaj peev xwm ua yeeb yaj kiab. Nkag siab txog kev coj tus cwj pwm ntawm HPMC yog qhov tseem ceeb rau kev ua haujlwm zoo rau lawv cov kev ua tau zoo hauv cov ntaub ntawv los tsim kho.

Rheological kev coj cwj pwm ntawm HPMC cov khoom siv:
Rheology yog txoj kev tshawb fawb txog cov ntaub ntawv uas muaj kev ntxhov siab thiab txaus. Kev coj tus cwj pwm ntawm HPMC yog cov khoom siv nyob ntawm cov yam ntxwv xws li kev xav, lub cev hnyav, ntsuas kub, thiab shear tus nqi. Ntawm cov kev ua kom muaj cov kev daws teeb meem hpmc Raws li kev hloov kho kev nce qib, HPMC cov kev daws teeb meem mus rau tsis yog-Newtonian tus cwj pwm, ua kom muaj kev sib tw shear-thinning uas muaj kev cuam tshuam nrog kev nce siab.

Lub viscosity ntawm cov ntaub ntawv HPMC tuaj yeem raug txiav los ntawm kev kho cov ntsiab lus xws li lub zog polymer concentration thiab hnyav hnyav. Kev txiav txim siab dua HPMC ua rau muaj viscosity ntau ntxiv vim muaj cov saw hlau polymer, ua rau cov kev daws teeb meem tuab lossis cov kua pleev. Tsis tas li ntawd, nce molecular hnyav ntawm HPMC txhim kho viscosity los ntawm kev txhawb nqa cov kev sib txuas lus muaj zog dua thiab cov saw anentanglements. Nkag siab cov kev sib raug zoo no yog qhov tseem ceeb rau cov khoom siv HPMC uas muaj kev xav nrog cov khoom siv hluav taws xob xav tau.

Lub zog rheological thiab viscosity ntawm cov ntaub ntawv HPMC ua si lub luag haujlwm tseem ceeb hauv kev lag luam ntau yam:

Kws Tshuaj Kho Mob: HPMC feem ntau yog siv los ua tus neeg sawv cev tuab hauv cov tshuaj uas muaj qhov ncauj, cov kev daws teeb meem ophthalmic, thiab cells. Tswj kev viscosity ntawm cov qauv viscosity ua kom zoo noj tshuaj, ruaj khov, thiab yooj yim ntawm kev tswj hwm.
Cov zaub mov thiab dej haus: hauv kev lag luam khoom noj, HPMC tau ua haujlwm ua haujlwm tuab, thiab emulsifier hauv cov khoom xws li cov kua qaub, kev hnav ris tsho, lwm yam kev xaiv. Optimizing viscosity txhim kho cov khoom kev ntxhib los mos, lub ntsej muag, thiab tshem tawm ruaj khov.
Kev Tsim Kho: HPMC-based cov ntaub ntawv siv nyob rau hauv daim ntawv thov kev tsim kho xws li cov nplaum ua ke, Caas lilars, thiab kev sib txuas ua ke. Cov khoom siv rheological ntawm cov ntaub ntawv no cuam tshuam kev ua haujlwm, cov tshuaj nplaum, thiab cov yam ntxwv kho, cuam tshuam cov dej num zoo thiab kav dej.
Cov khoom siv saib xyuas tus kheej: HPMC nrhiav tau thov hauv cov khoom lag luam ntawm tus kheej xws li tshuaj zawv plaub hau xws li tshuaj zawv plaub hau, muaj tshuaj txhuam hniav, thiab cov yeeb yaj kiab ua kom dhau los. Tswj viscosity ua kom cov khoom tsim nyog thiab ua haujlwm thaum siv.

Rureological tus cwj pwm thiab viscosity ntawm cov ntaub ntawv HPMC yog qhov tseem ceeb uas cuam tshuam lawv cov kev ua tau zoo thiab kev siv nyiaj hla kev lag luam. Nkag siab txog qhov cuam tshuam rau viscosity tso cai rau cov khoom lag luam ntawm cov khoom HPMC ntawm cov khoom lag luam hauv HPMC nrog cov khoom kom raws li cov cai. Kev tshawb fawb ntxiv nyob rau hauv daim teb no tuaj yeem ua rau kev nce qib hauv cov khoom tsim qauv thiab txhim kho kev txhim kho cov khoom lag luam tshiab nrog kev ua haujlwm txhim kho thiab kev ua haujlwm.