HydroxyPropyyl methylcellulose (HPMC)yog cov tsis-ionic cellulose ether ua los ntawm cov ntaub ntawv ntawm lub ntsej muag los ntawm kev hloov kho tshuaj lom neeg. Nws yog dav siv nyob rau hauv cov teb ntawm kev tsim kho, tshuaj, khoom noj thiab cov tshuaj pleev ib ce. Nws cov txheej txheem hluavtaws thiab cov khoom lag luam khoom muab nws cov kev ua tau tshwj xeeb thiab ua tau raws li ntau yam kev lag luam xav tau.
1. Khoom cua ntawm hydroxypropyl methylcellose
Kev npaj ntawm Kimacell® Cov txheej txheem hluavtaws tshwj xeeb suav nrog cov kauj ruam hauv qab no:
Alkalization ntawm cellulose
Cellulose raw cov ntaub ntawv (xws li cov paj rwb pulp lossis ntoo pulp) tau sib xyaw nrog sodium hydroxide tov thiab alkalized ntawm ib qho kub thiab siab los tsim alkali cellulose. Lub txheej txheem alkalization nthuav dav lub cellulose molecular saw thiab nce nws cov kev cuam tshuam nrog tus neeg sawv cev ntawm tus neeg sawv cev.
Etherification cov tshuaj tiv thaiv
Alkali cellulose yog refered nrog formaldehyde thiab propylene glycolene oxide los ua hydroxypropylages. Thaum lub sij hawm cov tshuaj tiv thaiv, methylation thiab hydroxypation tshua muaj tshwm sim, hloov ib feem ntawm cov xov xwm hydroxular, yog ib qho kev sib tw ntawm kev hloov pauv (DS) thiab cov hniav puas haum (MS).
MISutralization Thiab Ntxuav
Tom qab cov tshuaj tiv thaiv tiav, ib qho kev daws teeb meem acidic tau ntxiv rau nruab nrab cov tshuaj tiv thaiv kab mob thiab cov khoom siv kom tau txais cov HPMC.
Kom qhuav thiab crushing
Ntub HPMC tau qhuav mus rau cov ntsiab lus noo noo thiab cov hmoov av ua kom tau txais cov khoom kawg. Lub particle loj ntawm cov khoom tuaj yeem hloov kho raws li cov cai thov.
2. Cov khoom lag luam ntawm hydroxypropyl methylcelulose
HPMC muaj cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, uas ua rau nws zoo heev hauv ntau cov ntawv thov:
Cov dej txi dej zoo heev
HPMC tuaj yeem ua kom sai nyob rau hauv dej txias los tsim lub pob tshab colloidal tov, thiab nws solubility tsis cuam tshuam los ntawm dej hardness. HPMC yog insoluble hauv dej kub, tab sis nws tuaj yeem kho solubility tom qab dej txias. Cov cuab yeej no ua rau nws haum rau scenes uas yuav tsum thermal gelation kev ua tau zoo.
Cov Khoom Siv Hluav Taws Xob
HPMC yog cov tshuaj tsis-ionic nrog kev ua siab zoo rau cov acids, alkalis thiab ntsev, thiab tuaj yeem ruaj khov nyob rau hauv hom PHQU.
Zoo thickening thiab adhesion khoom
Cov kev daws teeb meem aqueous ntawm HPMC muaj cov nyhuv tuab tuab no, thiab nws viscosity nce nrog kev nce ntawm kev nce thiab molecular hnyav. Nws adhesion thiab zaj duab xis-ua cov khoom ua kom nws ua tau zoo nyob rau hauv cov txheej txheem thiab cov nplaum.
Cov Khoom Zoo Thermal Gelation Khoom
HPMC cov kev daws teeb meem tsis txaus ntseeg thim rov qab thaum ua kom sov thiab rov qab mus ua kua tom qab txias. Qhov no thermal gelation khoom yog dav siv nyob rau hauv cov ntaub ntawv hauv tsev (xws li cug ceg xis) los txhim kho kev ua haujlwm.
Tsis-toxic thiab biocompible
Txij li thaum HPMC yog muab tau los ntawm ntuj ntawm lub ntsej muag thiab muaj kev nyab xeeb zoo, nws yog cov khoom siv matracient, xws li cov khoom siv matrix, xws li cov tshuaj tswj cov tshuaj.
Hloov pauv hloov kho kom haum kev ua tau zoo
Cov qib degree (ds thiab mim) ntawm Kimacell® tau hloov kho nws solubility, yog li hloov chaw thiab lwm yam khoom kom tau raws li cov kev xav tau ntawm cov ntawv thov sib txawv.
3. Daim ntawv thov teb thiab cov kev cia siab
HPMC Yuav siv tau ua tshuaj khib nyiab thiab cov roj txo dej hauv lub teb tsim, raws li cov tshuaj tiv thaiv-tso tawm hauv cov chaw muag tshuaj, thiab ua emulsifier thiab stabilizer nyob rau hauv kev lag luam khoom noj. Nrog kev nce qib ntawm kev txhim kho ntsuab thiab kev loj hlob, lub zog hluav taws xob hluavtaws thiab kev loj hlob ntawm HPMC yuav yog kev tshawb fawb yav tom ntej.
HydroxyPropyyl methylcellulose tau dhau los ua qhov tsis tseem ceeb thiab cov khoom tseem ceeb hauv kev lag luam niaj hnub thiab txhua hnub nrog nws cov kev ua tau zoo tshaj plaws thiab versatility.
Lub Sijhawm Post: Jan-18-2025