HydroxyPropyyl methylcellose (HPMC) yog cov tsis-ionic cellulose ither ua los ntawm cov txheej txheem polymer los ntawm cov txheej txheem polymer los ntawm cov txheej txheem polymer los ntawm cov txheej txheem ntawm cov txheej txheem. Lawv yog cov ntxhiab tsw, tsis muaj qab hau thiab cov hmoov dawb dawb uas swed mus rau hauv qhov tseeb lossis me ntsis pos huab colloidal tov hauv dej txias. Nws muaj thickening, khi, dispersing, ua yeeb yaj kiab, ua yeeb yaj kiab, kev tshaj tawm, kev ua kom nto, khaws cia thiab tiv thaiv kev tiv thaiv thiab tiv thaiv kev tiv thaiv kab mob. HydroxyPropyl methyl cellulose thiab methyl cellulose tuaj yeem siv rau hauv cov ntaub ntawv tsim tsev, tshuaj, khoom noj khoom haus, ua liaj ua teb, ua liaj ua teb, txhua hnub tshuaj thiab lwm yam kev lag luam.
Dej khaws cov txiaj ntsig thiab cov ntsiab cai ntawm hydroxyprropyf methylcellose hpmc
Cellulose ether hpmc feem ntau yog cov dej rov qab thiab ua kom zoo dua ntawm txoj hlab nrig thiab gypsively txhim kho cov cohesive quab yuam thiab sag tiv thaiv ntawm slurry.
Yam khoom xws li cua kub, ntsuas kub thiab cua kub yuav cuam tshuam rau cov dej colatilization thiab gypsum-based khoom. Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej ua kom ruaj khov ntawm cov khoom lag luam nrog tib tus nqi HPMC ntxiv. Hauv kev tsim kho tshwj xeeb, cov dej khaws cov nyhuv khaws cia ntawm cov slurry tuaj yeem hloov kho los ntawm nce lossis txo tus HPMC ntxiv. Cov dej tuav tseg ntawm methyl cellulose hauv qab cov kev mob siab yog qhov ntsuas tau qhov ua tau zoo ntawm methyl cellulose ether. Cov khoom lag luam HPMC zoo dua tuaj yeem daws qhov teeb meem ntawm dej rov qab nyob hauv qab kub. Hauv cov caij nyoog kub, tshwj xeeb tshaj yog nyob rau hauv cov chaw kub thiab qhuav thiab nyias txheej HPMC yuav tsum txhim kho cov dej khaws cia ntawm cov slurry. High-zoo HPMC muaj kev sib txig zoo heev. Nws cov methoxy thiab hydroxyprropoxy pawg yog tusyees faib raws lub peev xwm molecular, uas tuaj yeem txhim kho lub peev xwm ntawm cov dej hydroxyl thiab itherchen kom tsim cov dej hydrodiat. , yog li ntawd cov dej dawb los ua ib txoj dej ntws, yog li kom tswj tau cov dej evapontively los ntawm huab cua siab, thiab ua tiav dej siab.
Zoo siab cellulose hpmc tuaj yeem sib xyaw thiab ua kom zoo nkauj, thiab qhwv cov khoom ntub dej, thiab qhwv txhua qhov chaw ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom ntub dej tso rau hauv lub sijhawm ntev, thiab cov kua nplaum inorgegic Cov khoom siv ntawm cov txheej txheem co coagulated yuav ua kom cov nyiaj sib zog thiab lub zog compressive ntawm cov khoom siv. Yog li ntawd, kev tsim kho kub-kub, txhawm rau kom ua tiav cov khoom siv hpmc zoo li, nws yuav tsum muaj cov dej tsis txaus, nws yuav muaj lub zog tsis txaus, txo lub zog, tawg, hollowing, hollowing thiab shedding tshwm sim los ntawm kev ziab ntau dhau. Teeb meem, tab sis kuj tseem nce cov kev tsim kho cov neeg ua haujlwm. Raws li cov tee ntsuas kub, tus nqi ntawm cov dej HPMC ntxiv tuaj yeem txo qis qis, thiab tib cov nyhuv retentent tau ua tiav.
Cov dej tuav tseg ntawm hydroxypropyl methylcellose HPMC khoom nws tus kheej feem ntau cuam tshuam los ntawm cov hauv qab no:
Tusyees reassed hpmc, mexoxyl thiab hydroxyproppoxyl yog tusyees faib tawm, thiab cov dej khaws cia siab;
Cellulose ether HPMC thermal gel kub yog high, dej tswj hwm tau siab; Txwv tsis pub, cov dej tuav cia tsawg;
Thaum lub viscosity ntawm cellulose ntawm cellulose ether HPM nce ntxiv, cov dej tswj kav ntxiv kuj nce ntxiv; Thaum lub viscosity nce mus txog ib theem, kev nce hauv dej retistion tus nqi nyhav yuav maj mam;
Qhov ntau dua tus nqi ntawm cellulose ether HPMP ntxiv, ntau dua cov dej khaws cia thiab qhov zoo dua cov txiaj ntsig khaws cia. Nyob rau hauv cov thaj tsam ntawm 0.25-0.6% ntxiv, dej khaws nyiaj khaws cia nce nrawm nrog kev nce ntxiv; Thaum qhov kev ntxiv ntxiv nce ntxiv, nce ntxiv ntawm cov dej khaws cov nqi rov qab qeeb qeeb.
Lub sij hawm Post: Jun-01-2023