Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom siv hluavtaws hluavtaws, dav siv hauv tshuaj, khoom noj khoom haus, kev tsim kho, khoom tu tus kheej thiab lwm yam haujlwm. Nws cov khoom tshwj xeeb ua rau HPMC muaj txiaj ntsig zoo hauv ntau daim ntawv thov.
1. Cov khoom siv tshuaj thiab cov qauv
HPMC yog tsim los ntawm kev hloov kho tshuaj ntawm cellulose, feem ntau los ntawm kev hloov cov tshuaj tiv thaiv ntawm hydroxyl pawg ntawm cellulose. Nws cov qauv molecular muaj cov pab pawg ua haujlwm xws li hydroxypropyl thiab methyl, uas ua rau nws muaj dej solubility zoo, viscosity thiab zaj duab xis-tsim zog. Cov tshuaj colloidal tsim los ntawm HPMC hauv dej tuaj yeem tsim cov yeeb yaj kiab pob tshab hauv qee qhov xwm txheej, uas ua rau lub hauv paus rau nws daim ntawv thov hauv ntau qhov chaw.
2. Cov chaw thov tseem ceeb
Kev npaj tshuaj HPMC yog siv dav hauv kev npaj tshuaj, feem ntau yog cov thickener, emulsifier thiab zaj duab xis-tsim tus neeg sawv cev. Nws tuaj yeem txhim kho cov solubility thiab bioavailability ntawm cov tshuaj thiab txhim khu kev ruaj ntseg ntawm cov tshuaj. Tsis tas li ntawd, HPMC kuj tseem siv tau rau hauv kev npaj-tso tawm thiab tswj-tso tawm los kho tus nqi ntawm cov tshuaj tso tawm.
Kev lag luam khoom noj Hauv kev lag luam khoom noj khoom haus, HPMC feem ntau yog siv los ua cov thickener thiab emulsifier. Nws tuaj yeem txhim kho qhov saj thiab kev ntxhib los mos ntawm cov zaub mov, txuas lub txee lub neej, thiab txhim kho kev ruaj ntseg ntawm cov khoom noj. Piv txwv li, HPMC tuaj yeem tiv thaiv kev tsim cov dej khov nab kuab hauv cov dej khov thiab cov khoom siv mis nyuj, tswj xyuas qhov saj ntawm cov khoom.
Cov khoom siv hauv tsev Hauv kev tsim kho kev lag luam, HPMC feem ntau yog siv los ua cov khoom ntxiv rau cov cement thiab mortar. Nws tuaj yeem txhim kho kev tsim kho kev ua haujlwm ntawm mortar, txhim kho nws cov dej tuav thiab adhesion, thiab txhim kho kev tawg tsis kam thiab compressive zog. Qhov sib ntxiv ntawm HPMC ua rau cov mortar tsawg dua tuaj yeem tawg thaum lub sijhawm ziab, yog li ua rau lub neej ua haujlwm ntawm cov khoom siv hauv tsev.
Cov khoom siv tu tus kheej Hauv cov khoom siv tu tus kheej, xws li cov tshuaj pleev ib ce, tshuaj zawv plaub hau, da dej gels, thiab lwm yam, HPMC feem ntau yog siv los ua cov thickener thiab zaj duab xis qub. Nws tuaj yeem ua kom qhov sib xws ntawm cov khoom thiab txhim kho cov neeg siv kev paub dhau los, thaum tsim cov yeeb yaj kiab tiv thaiv ntawm daim tawv nqaij los txhim kho cov nyhuv moisturizing ntawm cov khoom.
3. Qhov zoo
Solubility zoo heev thiab thickening HPMC muaj zoo solubility nyob rau hauv dej thiab muaj peev xwm tsim ib tug ruaj khov colloidal tov nyob rau hauv txawv concentrations, nrog ib tug zoo thickening nyhuv. Nws cov viscosity tuaj yeem tswj tau los ntawm kev kho qhov concentration thiab kub kom ua tau raws li cov ntawv thov sib txawv.
Biocompatibility HPMC yog ib qho uas tsis yog-ionic dej-soluble polymer nrog biocompatibility zoo thiab tsis muaj khaus rau ntawm daim tawv nqaij thiab tib neeg lub cev, yog li nws yog tshwj xeeb tshaj yog dav siv nyob rau hauv cov tshuaj thiab cov khoom siv tu tus kheej.
Kev tswj hwm cov tshuaj tso tawm HPMC tuaj yeem kho tus nqi tso tawm ntawm cov tshuaj hauv kev npaj tshuaj los ntawm kev hloov nws cov concentration thiab molecular hnyav, thiab tsim nyog rau kev npaj ntawm sustained-tso thiab tswj-tso npaj. Cov yam ntxwv no yog qhov tseem ceeb hauv kev tshawb fawb txog tshuaj thiab kev tsim kho, uas tuaj yeem txhim kho kev ua tau zoo ntawm cov tshuaj thiab txo cov kev mob tshwm sim.
Kev tiv thaiv ib puag ncig HPMC yog hloov kho los ntawm cov nroj tsuag ntuj cellulose thiab muaj qee yam kev tiv thaiv ib puag ncig, uas yog raws li lub tswv yim ntawm ntsuab chemistry. Piv nrog cov hluavtaws hluavtaws, HPMC muaj kev cuam tshuam tsawg dua rau ib puag ncig.
4. Daim ntawv thov cov nyom thiab cov lus qhia kev txhim kho
Txawm hais tias HPMC tau siv dav hauv ntau qhov chaw, tseem muaj qee qhov kev sib tw hauv kev siv tiag tiag. Piv txwv li, hauv kev npaj tshuaj, cov nyhuv thickening ntawm HPMC yuav cuam tshuam los ntawm qhov kub thiab txias, yog li yuav tsum tau ua tib zoo xav hauv cov qauv tsim. Tsis tas li ntawd, nrog rau kev xav tau ntawm cov neeg siv khoom ntau ntxiv rau cov khoom ntuj thiab ntsuab, kev sib tw ua lag luam rau HPMC kuj tseem muaj zog zuj zus ntxiv.
Txoj kev loj hlob ntawm HPMC tuaj yeem tsom mus rau kev hloov kho tshiab ntawm kev hloov kho thev naus laus zis los txhim kho nws cov kev ua tau zoo thiab kev yoog raws. Nyob rau tib lub sijhawm, kev sib txuas cov kev tshawb fawb ntawm cov ntaub ntawv tshiab los tsim kom muaj txiaj ntsig zoo thiab ua haujlwm tau zoo dua HPMC derivatives yuav yog qhov tseem ceeb rau yav tom ntej.
Hydroxypropyl methylcellulose tau dhau los ua ib qho khoom siv tseem ceeb hauv ntau qhov kev lag luam vim nws cov khoom siv tshuaj lom neeg zoo heev thiab ntau yam. Txawm hais tias hauv kev npaj tshuaj, kev lag luam zaub mov, lossis cov khoom siv hauv tsev thiab cov khoom siv tu tus kheej, daim ntawv thov ntawm HPMC tau qhia nws qhov tseem ceeb thiab dav. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis tsis tu ncua, daim ntawv thov teb ntawm HPMC xav tias yuav nthuav dav ntxiv, nqa ntau txoj hauv kev tshiab thiab kev txhim kho rau ntau yam kev lag luam.
Post lub sij hawm: Oct-12-2024