Siv hydroxypropylencellulose (HPMC) kom tswj viscosity muaj cov txiaj ntsig tseem ceeb hauv ntau thaj teb, tshwj xeeb yog nyob rau hauv kev lag luam khoom noj thiab kev lag luam kom hniav.
1. Kev ruaj khov thiab kev sib xyaw
Raws li cov tuab, HPMC tuaj yeem tswj cov viscosity ntawm cov kev daws teeb meem lossis sib tov, yog li kev txhim kho qhov ruaj khov thiab kev sib xyaw ntawm cov qauv. Nws muaj muaj zog hydrophilicity thiab tuaj yeem pom sai sai rau hauv dej los ua cov kev daws teeb meem colloloidal, tsis txhob muaj nag lossis daus lossis stratification ntawm cov khoom. Kev haus tshuaj raug ncua lossis emulsions, sib txawv, cov viscosity viscosity tuaj yeem ua kom muaj kev sib xws ntawm txhua qhov kev kuaj thiab zam kev tsis sib xws vim tias ua kom tiav lossis stratification.
2. Zoo biocompatibility
HPMC yog kev nyab xeeb, tsis muaj tshuaj lom thiab tsis yog-irritating cov khoom siv uas tau siv dav hauv cov chaw muag tshuaj. Nws muaj zoo biocompatibility thiab tuaj yeem siv tau kev nyab xeeb hauv tib neeg lub cev yam tsis muaj kev cuam tshuam nrog kev phiv. Thaum tswj cov viscosity ntawm cov tshuaj npaj, HPMC tuaj yeem ua kom qeeb tso yeeb tshuaj hauv tib neeg lub cev, ntev ntev ntawm kev siv tshuaj, thiab txhim kho cov nyhuv kho. Tsis tas li ntawd, HPMC lub viscosity tswj kev muaj peev xwm pab txhim kho cov saj ntawm cov tshuaj thiab ua kom muaj kev npaj rau ntawm qhov ncauj.
3. Thermal stability
HPMC muaj qhov hloov me me hauv viscosity ntawm ntau kub thiab muaj qhov zoo thermal stability. Nws tuaj yeem tswj cov viscosity ruaj khov txawm tias nyob rau hauv cov kev mob kub khov, uas yog tshwj xeeb tshaj yog cov txheej txheem ntau heev uas xav tau kev kho cua sov. Piv txwv li, hauv kev lag luam khoom noj khoom haus, ntau cov txheej txheem muaj kev kub ntxhov, thiab HPMC tuaj yeem paub meej tias cov zaub mov thiab saj cov zaub mov tsis raug cuam tshuam los ntawm qhov kub hloov.
4. Txhim Kho Khoom Zoo Tshaj
HPMC muaj cov nplaum zoo tshaj plaws, uas yog qhov tseem ceeb hauv cov ntaub ntawv tsim tsev thiab txheej txheem. Nws tuaj yeem txhim kho cov khoom nplaum thiab cov khoom khaws cia xws li cug, putty thiab vais nplaum, thiab tiv thaiv kev tawg thiab poob tawm. Hauv cov txheej txheej, kev siv HPMC tuaj yeem txhim kho cov xim zoo nkauj thiab kev sib dhos ntawm cov txheej, ua kom muaj qhov chaw du thiab tiaj tiaj tom qab kev tsim kho.
5. Cov Khoom Siv Hluav Taws Xob Zoo Tshaj Plaws
Rheological cov khoom ntawm HPMC yog ib qho ntawm nws cov ntsiab lus tseem ceeb hauv kev tswj viscosity. Nws ua pov thawj cov viscosity siab ntawm cov nqi qis thiab qis dua viscosity ntawm cov nqi siab. Qhov no tsis yog-Newtonian cov kua dej pab nws kom muab kev ua haujlwm zoo ua raws li cov txheej txheem sib txawv. Piv txwv li, thaum txheej, HPMC tuaj yeem txo cov kev tiv thaiv lub sijhawm thiab nce cov kev ua haujlwm ntawm kev ua haujlwm thaum ruaj khov los tiv thaiv sagging lossis dripping.
6. Dav pom tseeb
HPMC muaj kev ruaj khov zoo rau cov kev daws teeb meem nrog cov pH qhov tseem ceeb thiab tuaj yeem tswj viscosity stability nyob rau hauv acidic, nruab nrab thiab alkaline cov xwm txheej. Qhov kev hloov kho no ua rau nws ua tau zoo nyob rau hauv ntau qhov chaw thov, tshwj xeeb tshaj yog nyob rau hauv cov qauv hloov kho tsis muaj kev hloov pauv viscosity yam tsis muaj kev cuam tshuam zoo heev los ntawm lwm cov khoom sab nraud.
7. Txhim kho cov khoom zoo ntawm cov khoom lag luam
Nyob hauv daim teb ntawm cov zaub mov thiab cov tshuaj pleev ib ce, HPMC tuaj yeem txhim kho cov kev ntxhib los mos thiab xav tias yog cov khoom lag luam los ntawm kev kho cov viscosity ntawm cov khoom. Piv txwv li, nyob rau hauv lotions thiab cov tawv nqaij pleev, kev siv HPMC tuaj yeem ua cov khoom siv yooj yim rau kev thov, txhim kho cov neeg muaj kev nplij siab. Nyob rau hauv cov zaub mov, HPMC tuaj yeem muab cov khoom lag luam me thiab ruaj khov, txhim kho qhov kev paub dhau los ntawm cov khoom.
8. Txo cov nqi ntau lawm
Siv HPMC yog tus neeg tswj hwm viscosity kuj tseem tuaj yeem txo cov nqi tsim khoom hauv qee kis. Vim nws cov peev txheej ua rau muaj peev xwm ntxiv rau HPMC me me kom ua tiav qhov xav tau, uas txo tus nqi ntawm cov khoom siv raw. Ib qho ntxiv, cov tshuaj ruaj khov rau HPMC kuj txo tus nqi tswj xyuas thiab pov tseg cov txheej txheem ntau lawm.
Raws li ib qho ntau yam thiab muaj txiaj ntsig viscosity concifier tshuab, HPMC muaj qhov dav ntxiv kev cia siab hauv ntau yam kev lag luam. Nws cov txiaj ntsig hauv kev ruaj khov, biocompatibility, thermal ruaj khov thiab dav kev sib ntsib kom muaj kev xav tau hauv cov kev xav tau sib txawv hauv cov xwm txheej sib txawv. Ib qho ntxiv, los ntawm kev txhim kho qhov zoo thiab hnov cov khoom lag luam, HPMC tsis yog txhim kho cov nqi sib tw ntawm cov khoom lag luam, tab sis kuj txuag tau cov nqi ntau lawm rau lub tuam txhab. Vim tias qhov no, HPMC tau dhau los ua qhov kev xaiv zoo tshaj plaws rau kev xaiv viscosity hauv ntau thaj teb.
Lub Sijhawm Post: Sep-06-2024