Lub gel kub ntawm hydroxypropylencelulose (HPMC) yog qhov tseem ceeb hauv kev lag luam, suav nrog cov tshuaj, cov khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. HPMC yog lub suab hluav taws xob semi-hluav taws xob muab tau los ntawm cellulose, siv dav hlau, thiab stabilpatibility, tsis muaj txiaj ntsig, thiab ua yeeb yaj kiab-ua yeeb yaj kiab cov khoom.
Nkag siab txog qhov kub thiab txias ntawm HPMC yog qhov tseem ceeb vim tias nws cuam tshuam rau nws qhov kev txiav txim siab, thiab cov kev txiav txim siab rau nws, cov hau kev ntawm kev txiav txim siab, thiab nws qhov tseem ceeb hla kev lag luam sib txawv.
Dab tsi yog gel kub?
Lub gel kub ntawm lub polymer yog hais txog qhov kub uas nws sau gel rau ntawm hydration lossis kev sib cais hauv cov kuab tshuaj. Rau HPMC, qhov no yog qhov ntsuas kub uas cov chains polymer entangs thiab ua ib qho cuab yeej cuab tam, coj mus rau gel tsim. Kev hloov pauv ntawm kev daws teeb meem rau Gel lub xeev yog qhov tseem ceeb rau nws qhov kev ua tau zoo hauv ntau yam kev siv.
Yam cuam tshuam rau kev kub nyhiab ntawm HPMC:
Qib ntawm kev hloov pauv (DS): HPMC's kub thiab txias yog nyob ntawm qhov degree ntawm nws hydroxypropyl thiab methyl pawg. Feem ntau, siab dua DS ua rau txo qis gelation kub.
Molecular hnyav (MW): Lub cev hnyav dua HPMC nyhav kom tau ntau dua gel kub vim muaj kev nce siab saw entanglement.
Kev txhawj xeeb thiab hnyav: gel kub yog cuam tshuam los ntawm HPMC concentration thiab qhov xwm ntawm cov kuab tshuaj. Ntau qhov ntau thiab qee cov kuab tshuaj tuaj yeem txo qis cov khoom kub nyhiab.
Ntxiv: Ntxiv ntawm salts, acids, lossis lwm cov polymers tuaj yeem hloov cov gelation tus cwj pwm ntawm HPMC.
PH: P cuam tshuam rau Ionization ntawm pab pawg ua haujlwm ntawm HPMC, uas nyob rau hauv lem cuam tshuam nws tus cwj pwm gelation.
Kev txiav txim siab ntawm gel kub:
Ob peb txoj kev ua haujlwm los txiav txim siab qhov kub ntawm HPMC:
Kev soj ntsuam pom kev: soj ntsuam cov tshuaj tawm tsam rau kev hloov pauv ntawm viscosity los yog turbidity raws li qhov kub hloov.
Rheological ntsuas: Siv cov lus nrawm los ntsuas cov kev hloov pauv hauv viscosity los yog elastic modulus raws li kev ua haujlwm ntawm qhov kub.
Cov tshuaj ntsuam sib txawv raws li cov calorimetry (DSC): Tshawb nrhiav qhov endothermic ncov sib npaug rau gel tsim.
Turboidnetry: Tshuaj xyuas cov kev daws teeb meem cov lus teb siv cov txheej txheem xa tawm.
Tseem ceeb rau kev lag luam:
Kws Kho Mob: Hauv cov khoom siv tshuaj, qhov kub thiab txias ntawm HPMC-based ntawm HPMC-based hydrogels thiab gel lub zog, cuam tshuam rau kev ua tau zoo thiab muaj kev ruaj ntseg ntawm cov tshuaj yeeb yaj kiab.
Kev lag luam khoom noj: HPMC yog siv los ua cov tuab, stabilizer, thiab tus neeg sawv cev hauv cov khoom noj. Gel qhov kub cuam tshuam rau kev ntxhib los mos, cov ncauj lus pom kev zoo thiab muaj kev ruaj khov ntawm cov khoom noj.
Cov tshuaj pleev ib ce: Gel kub cuam cuam tshuam rau cov khoom ntawm cov tshuaj pleev ib ce ntawm cov tshuaj pleev ib ce, kev cuam tshuam cov khoom pov thawj, thiab hnov cov cwj pwm.
Kev tsim kho: Nyob rau hauv cov ntaub ntawv kev tsim kho xws li mortars thiab cov nplaum, HPMC's Gel kub cuam tshuam rau kev ua haujlwm, teeb tsa lub sijhawm, thiab lub sijhawm kawg.
Lub gel kub ntawm hydroxypropyl methylcellulose plays ib tug pivotal lub luag hauj lwm hauv nws qhov kev ua tau zoo thoob plaws ntau yam kev lag luam. Nkag siab txog qhov tshwm sim gelation thiab ua haujlwm ntsuas ntsuas kom tsim nyog yog qhov tseem ceeb rau kev ua kom zoo dua cov khoom lag luam thiab ua kom cov khoom lag luam xav tau thiab ua kom tau cov khoom lag luam xav tau thiab ua kom tau cov khoom lag luam xav tau. Raws li kev lag luam txuas ntxiv mus rau Innovate, cov kev sib koom ua ke ntawm HPMC's kub thiab txias yuav nyob ib cheeb tsam ntawm kev tshawb fawb thiab kev txhim kho tsav tsheb hauv ntau yam.
Lub Sijhawm Post: Feb-18-2025