Siv hydroxypropyl methylcellulose (HPMC) los tswj viscosity muaj txiaj ntsig zoo hauv ntau lub teb, tshwj xeeb tshaj yog nyob rau hauv kev lag luam tshuaj, zaub mov, kev tsim kho thiab tshuaj pleev ib ce.
1. Stability thiab uniformity
Raws li cov thickener, HPMC tuaj yeem tswj tau qhov viscosity ntawm cov kev daws teeb meem lossis cov khoom sib tov, yog li txhim kho qhov ruaj khov thiab sib xws ntawm cov qauv. Nws muaj qhov muaj zog hydrophilicity thiab tuaj yeem yaj sai sai hauv dej los tsim cov tshuaj sib xyaw colloidal, tsis txhob los nag lossis stratification ntawm cov khoom. Rau cov tshuaj ncua lossis emulsions, cov viscosity tsis sib xws tuaj yeem ua kom muaj qhov sib xws ntawm cov tshuaj ntau npaum li cas ntawm txhua qhov kev kuaj thiab tsis txhob noj tshuaj tsis sib xws vim muaj sedimentation lossis stratification.
2. Zoo biocompatibility
HPMC yog cov khoom muaj kev nyab xeeb, tsis muaj tshuaj lom thiab tsis ua rau khaus uas yog siv dav hauv kev lag luam tshuaj. Nws muaj biocompatibility zoo thiab tuaj yeem siv nyab xeeb hauv tib neeg lub cev yam tsis muaj kev phiv. Thaum tswj cov viscosity ntawm cov tshuaj npaj, HPMC tuaj yeem ua kom cov tshuaj tso tawm qeeb hauv tib neeg lub cev, ua kom lub sijhawm ntev ntawm kev siv tshuaj, thiab txhim kho cov nyhuv kho. Tsis tas li ntawd, HPMC lub peev xwm tswj viscosity pab txhim kho cov saj ntawm cov tshuaj thiab ua kom lub qhov ncauj npaj ntau dua.
3. Thermal stability
HPMC muaj qhov hloov me me hauv viscosity ntawm qhov sib txawv ntawm qhov kub thiab txias zoo. Nws tuaj yeem tswj tau qhov viscosity ruaj khov txawm tias nyob rau hauv qhov kub thiab txias, uas yog qhov tseem ceeb tshwj xeeb hauv cov txheej txheem tsim khoom uas yuav tsum tau kho cua sov. Piv txwv li, hauv kev lag luam khoom noj khoom haus, ntau cov txheej txheem kev ua haujlwm suav nrog kev kho qhov kub thiab txias, thiab HPMC tuaj yeem ua kom ntseeg tau tias qhov kev ntxhib los mos thiab saj ntawm cov zaub mov tsis cuam tshuam los ntawm qhov kub thiab txias.
4. Txhim kho cov khoom adhesion
HPMC muaj adhesion zoo heev, uas yog ib qho tseem ceeb heev nyob rau hauv lub tsev cov ntaub ntawv thiab txheej. Nws tuaj yeem txhim kho qhov adhesion thiab dej tuav cov ntaub ntawv xws li mortar, putty thiab pobzeb nplaum, thiab tiv thaiv kev tawg thiab poob tawm. Hauv cov txheej txheem, kev siv HPMC tuaj yeem txhim kho qhov fluidity thiab uniformity ntawm cov txheej, ua kom lub ntsej muag du thiab tiaj tus tom qab kev tsim kho.
5. Zoo heev rheological zog
Cov khoom rheological ntawm HPMC yog ib qho ntawm nws qhov tseem ceeb hauv kev tswj cov viscosity. Nws nthuav tawm cov viscosity siab ntawm tus nqi qis qis thiab qis dua viscosity ntawm tus nqi siab shear. Cov khoom tsis yog-Newtonian cov kua dej no ua rau nws muab kev ua haujlwm zoo tshaj plaws hauv cov txheej txheem sib txawv. Piv txwv li, thaum lub sij hawm txheej, HPMC tuaj yeem txo qhov kev tiv thaiv thaum lub sij hawm txheej thiab ua kom yooj yim ntawm kev ua haujlwm, tab sis tswj kom muaj viscosity txaus thaum nyob ruaj ruaj los tiv thaiv sagging los yog poob.
6. dav adaptability
HPMC muaj kev ruaj ntseg zoo rau cov kev daws teeb meem nrog cov pH sib txawv thiab tuaj yeem tswj cov viscosity stability nyob rau hauv acidic, nruab nrab thiab alkaline tej yam kev mob. Qhov kev hloov pauv no ua rau nws ua tau zoo hauv ntau qhov kev thov ib puag ncig, tshwj xeeb tshaj yog nyob rau hauv cov qauv uas xav tau kev hloov pauv pH, qhov twg HPMC tuaj yeem ua kom ruaj khov viscosity yam tsis muaj kev cuam tshuam los ntawm lwm yam.
7. Txhim kho qhov zoo ntawm cov khoom
Hauv kev lag luam khoom noj thiab tshuaj pleev ib ce, HPMC tuaj yeem txhim kho qhov kev ntxhib los mos thiab kev xav ntawm cov khoom los ntawm kev kho cov viscosity ntawm cov khoom. Piv txwv li, nyob rau hauv cov tshuaj pleev ib ce thiab cov tshuaj pleev ib ce, kev siv HPMC tuaj yeem ua rau cov khoom siv yooj yim dua, txhim khu cov nyhuv moisturizing, thiab ua kom cov neeg siv khoom muaj kev nplij siab. Hauv cov khoom noj, HPMC tuaj yeem muab cov khoom muag muag thiab cov qauv ruaj khov, txhim kho tag nrho cov kev paub ntawm cov khoom.
8. Txo cov nqi tsim khoom
Siv HPMC ua tus tswj viscosity kuj tuaj yeem txo cov nqi tsim khoom hauv qee kis. Vim nws muaj peev xwm thickening npaum, nws yog feem ntau tsuas yog yuav tsum tau ntxiv ib me me ntawm HPMC kom ua tau raws li qhov xav tau viscosity, uas txo cov khoom siv raw. Tsis tas li ntawd, cov tshuaj lom neeg ruaj khov thiab cov pa phem tsawg ntawm HPMC kuj txo cov nqi tu thiab pov tseg cov nqi pov tseg hauv cov txheej txheem tsim khoom.
Raws li kev hloov pauv viscosity ntau yam thiab muaj txiaj ntsig zoo, HPMC muaj cov ntawv thov dav dav hauv ntau qhov kev lag luam. Nws qhov zoo hauv kev ruaj ntseg, biocompatibility, thermal stability, rheological zog thiab dav adaptability pab kom nws ua tau raws li cov kev xav tau sib txawv hauv ntau daim ntawv thov scenarios. Tsis tas li ntawd, los ntawm kev txhim kho qhov zoo thiab kev paub txog ntawm cov khoom, HPMC tsis tsuas yog txhim kho kev lag luam kev sib tw ntawm cov khoom, tab sis kuj txuag cov nqi tsim khoom rau lub tuam txhab. Vim li no, HPMC tau dhau los ua qhov kev xaiv zoo tshaj plaws rau kev tswj viscosity hauv ntau qhov chaw.
Post lub sij hawm: Sep-06-2024