HydroxyPropyyl methylcellulose qauv txawv

HydroxyPropyyl Methylcellulose (HPMC)yog ib qho kev sib txuas ntxiv uas siv hauv kev lag luam ntau yam, suav nrog cov tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Nws cov khoom thiab cov ntawv thov sib txawv raws nws cov qauv molecular, uas tuaj yeem hloov kho kom haum rau cov kev xav tau tshwj xeeb.

Tus qauv tshuaj:

HPMC yog qhov ua kom muaj txiaj ntsig ntawm cellulose, lub ntuj polymer pom hauv cov nroj tsuag.
Lub hydroxypropyl thiab methyl chaw yog txuas rau cov pawg hydroxyl ntawm lub cellulose caj qaum.
Qhov sib piv ntawm cov hloov chaw txiav txim cov khoom ntawm HPMC, xws li solubility, gelation, thiab zaj duab xis-tsim muaj peev xwm.

Kev Hloov Dag (DS):

DS hais txog qhov nruab nrab ntawm cov neeg hloov pauv ib pawg twg hauv chav dej qab zib hauv lub cell caj qaum.
Cov nqi DS ntau dua ua rau muaj ntau zog hydrophilicity, solubility, thiab muaj peev xwm gelation.
Low DS HPMC muaj ntau dua kev ruaj khov thiab muaj cov dej noo zoo dua, ua kom haum rau cov ntawv thov kev tsim kho.

Molecular hnyav (MW):

Molecular qhov hnyav cuam tshuam rau viscosity, zaj duab xis-tsim muaj peev xwm, thiab cov khoom siv neeg kho mob.
Siab molecular hnyav HPMC feem ntau muaj viscosity thiab ua yeeb yaj kiab zoo dua qub, ua kom haum rau kev siv tshuaj tiv thaiv-tso tawm.
Txo cov moleecular hnyav variants yog qhov xav tau rau cov ntawv thov uas qis dua kev sib txawv thiab qhov nrawm dua, xws li ua cov nplaum.

Loj me me loj:

Particle loj cuam tshuam hmoov hmoov ntws ntws tawm, tus lej sib cais, thiab kev sib txawv ntawm cov qauv.
Cov nplua me me particle loj HPMC disperses ntau dua yooj yim hauv cov kev daws teeb meem aqueous, ua kom nrawm dua thiab ua tiav.
Coarser hais yuav muab cov khoom ntws zoo dua hauv kev sib xyaw qhuav tab sis yuav xav tau cov sijhawm nruab sijhawm.

Gelation kub:

Gelation kub yog hais txog qhov kub ntawm uas HPMC daws teeb meem yauv mus hla theem hloov ntawm kev daws teeb meem rau ib qho gel.
Siab dua qib thiab molecular hnyav feem ntau ua rau txo qis gelation kub.
Kev nkag siab txog qhov kub yog qhov tseem ceeb hauv kev sau-tso cov tshuab tshuaj thiab hauv kev tsim cov kua txiv rau cov ntawv thov cov duab kos.

Thermal Khoom:

Thermal Ruaj Ruaj yog qhov tseem ceeb hauv cov ntawv thov uas HPMC raug rau tshav kub thaum ua lossis cia.
Cov DS HPMC ntau dua yuav nthuav tawm qis dua qhov hluav taws xob ruaj khov vim muaj ntau cov chaw ua haujlwm tsawg dua.
Thermal Kev Tshawb Xyuas Qhov Kev Ntsuas Hluav Taws Xob Xws Li Cov Hluav Taws Xob Hluav Taws Xob (DSC) thiab Kev Ntsuas Hluav Taws Xob (TGA) yog siv los ntsuas cov cua sov cua sov.

Solubility thiab o tus cwj pwm:

Solubility thiab o tuaj pwm yog nyob ntawm DS, hnyav hnyav, thiab kub.
Cov nqi DS ntau dua thiab cov roj av ntau dua feem ntau nthuav tawm solubility ntau dua thiab o hauv dej.
Nkag siab solubility thiab o tus cwj pwm yog qhov tseem ceeb hauv kev tsim qauv tswj tshuaj thiab cov qauv tshuaj rau cov tshuaj siv rau cov ntawv thov biomedical.

Rheological khoom:

Rheological cov khoom xws li viscosity, shear thinning tus cwj pwm, thiab cov kab ntawv yog qhov tseem ceeb hauv ntau yam kev siv.
HPMCCov kev daws teeb meem pseudopastic cwj pwm, qhov twg viscosity txo nrog nce shear tus nqi.
Lub zog rheological ntawm HPMC cuam tshuam nws cov txheej txheem hauv kev lag luam xws li khoom noj, cov tshuaj pleev ib ce, thiab kws tshuaj pleev ib ce.

Qhov sib txawv ntawm ntau tus qauv ntawm HPMC qia los ntawm kev hloov pauv hauv cov qauv tshuaj lom neeg, soluble loj, soluble loj, officological cov khoom. Nkag siab cov kev sib txawv no yog qhov tseem ceeb rau kev xaiv HPMC tsim nyog varidiant rau cov ntawv thov tshwj xeeb, xws li ntawm cov ntaub ntawv tsim kho.