HPMC, tseem hu ua hydroxypropyl methylcellulose, yog cov dej-soluble polymer dav siv hauv tshuaj pleev ib ce, tshuaj thiab zaub mov kev lag luam. Lub polymer yog muab los ntawm cellulose, ib yam khoom muaj nyob rau hauv cov nroj tsuag. HPMC yog cov thickener zoo heev siv los ua kom cov viscosity ntawm ntau yam kev daws teeb meem. Nws lub peev xwm los tsim cov thixotropic gels kuj ua rau nws muaj kev xaiv nrov hauv ntau daim ntawv thov.
Thickening zog ntawm HPMC
Lub thickening zog ntawm HPMC paub zoo nyob rau hauv kev lag luam. HPMC tuaj yeem ua kom cov viscosity ntawm cov tshuaj los ntawm kev tsim cov gel network uas cuam tshuam cov dej molecules. HPMC particles tsim ib lub gel network thaum hydrated hauv dej thiab nyiam ib leeg los ntawm hydrogen bonds. Lub network tsim muaj peb-dimensional matrix uas ua rau kom cov viscosity ntawm cov tshuaj.
Ib qho txiaj ntsig tseem ceeb ntawm kev siv HPMC ua cov thickener yog tias nws tuaj yeem ua kom cov kua nplaum tsis muaj kev cuam tshuam rau nws qhov pom tseeb lossis xim. HPMC yog non-ionic polymer, uas txhais tau hais tias nws tsis muab ib qho nqi rau kev daws. Qhov no ua rau nws zoo tagnrho rau siv hauv cov qauv ntshiab lossis pob tshab.
Lwm qhov kom zoo dua ntawm HPMC yog tias nws tuaj yeem ua kom cov kev daws teeb meem ntawm qhov tsis tshua muaj siab. Qhov no txhais tau hais tias tsuas yog ib qho me me ntawm HPMC yuav tsum tau ua kom tiav qhov xav tau viscosity. Qhov no tuaj yeem txuag cov nqi rau cov tuam txhab tsim khoom thiab muab cov neeg siv khoom lag luam ntau dua.
Thixotropy ntawm HPMC
Thixotropy yog cov cuab yeej ntawm cov khoom siv los txo cov viscosity thaum raug kev nyuaj siab shear thiab rov qab mus rau nws qhov qub viscosity thaum qhov kev ntxhov siab raug tshem tawm. HPMC yog cov khoom siv thixotropic, txhais tau tias nws kis tau los yog nchuav yooj yim nyob rau hauv kev nyuaj siab shear. Txawm li cas los xij, thaum qhov kev ntxhov siab raug tshem tawm, nws rov qab mus rau qhov nplaum thiab thickens dua.
Cov khoom thixotropic ntawm HPMC ua rau nws zoo tagnrho rau ntau daim ntawv thov. Piv txwv li, nws yog feem ntau siv nyob rau hauv cov xim, raws li ib tug tuab lub tsho tiv no ntawm ib tug nto. Cov khoom thixotropic ntawm HPMC xyuas kom meej tias cov txheej txheem tseem nyob ntawm qhov chaw tsis muaj sagging lossis khiav. HPMC kuj tseem siv tau rau hauv kev lag luam khoom noj khoom haus los ua cov thickener rau cov kua ntses thiab hnav khaub ncaws. Cov khoom thixotropic ntawm HPMC xyuas kom meej tias cov kua ntses los yog hnav khaub ncaws tsis drips los ntawm cov diav los yog phaj, tab sis tsis txhob nyob twj ywm tuab thiab zoo ib yam.
HPMC yog ntau yam polymer nrog ntau daim ntawv thov hauv ntau qhov kev lag luam. Nws cov khoom thickening thiab thixotropic zog ua rau nws zoo tagnrho rau cov tshuaj pleev ib ce, tshuaj thiab zaub mov formulations. HPMC yog cov thickener zoo heev, ua kom cov viscosity ntawm cov tshuaj tsis cuam tshuam rau nws qhov tseeb lossis xim. Nws cov khoom thixotropic xyuas kom meej tias cov tshuaj tsis ua tuab dhau los yog nyias, nyob ntawm daim ntawv thov. HPMC yog ib qho tseem ceeb ntawm ntau yam khoom, thiab nws cov txiaj ntsig ntau ua rau nws muaj kev xaiv nrov rau cov tuam txhab thiab cov neeg siv khoom.
Post lub sij hawm: Aug-25-2023