HydroxyPropyyl methylcellose (HPMC) yog cov khoom tseem ceeb nrog ntau yam kev lag luam hauv cov ntaub ntawv hauv kev lag luam thiab lwm yam kev lag luam xws li khoom noj, tshuaj pleev ib yam thiab kev tsim kho. Qhov kev thov rau HPMC tau loj hlob nyob rau lub xyoo vim nws cov khoom tshwj xeeb xws li thickening, duab dhos ua yeeb yaj kiab thiab dej khaws cia. Hauv tsab xov xwm no, peb yuav tham txog alkaline leaching ntau lawm txheej txheem ntawm hydroxypropyl methylulose (HPMC).
Lub alkali Leaching txheej txheem ntau lawm ntawm hydroxypropylencellulose (HPMC) yog cov txheej txheem uas cov tshuaj pleev xim rau cov tshuaj pleev cov tshuaj pleev thiab ua kom methyl. Cov txheej txheem yuav tshwm sim nyob rau hauv qhov kub thiab txias, siab thiab lub sijhawm tswj tau los ua cov khoom lag luam HPM zoo zoo HPMC.
Thawj kauj ruam hauv kev tsim HPMC siv cov alkaline leaching txheej txheem ntau lawm yog qhov kev npaj ntawm cellulose raw khoom. Cellulose yog thawj lub portified los ntawm kev tshem tawm tej impurities thiab tom qab ntawd hloov mus rau hauv alkali cellulose los ntawm kev kho nrog cov alkali xws li sodium hydroxide. Cov kauj ruam no yog qhov tseem ceeb vim tias nws nce qhov kev cuam tshuam ntawm lub cellulose nrog cov tshuaj reagents siv nyob rau hauv cov kauj ruam tom ntej.
Alkali cellulose raug kho nrog kev sib xyaw ntawm cov tshuaj pleev cov tshuaj pleev cov tshuaj pleev cov roj pleev thiab methyl chloride nyob rau hauv kev tswj kub thiab siab. Cov tshuaj tiv thaiv ntawm alkali cellulose thiab cov reagent tau ua rau tsim cov khoom lag luam, uas yog kev sib xyaw ntawm hydroxypropylulose thiab lwm yam khoom noj.
Qhov sib tov yog ntxuav, neutralized thiab lim kom tshem tawm impurities xws li siv reagents thiab cov khoom siv. Lub txiaj ntsig tau tshwm sim yog ces muaj los ntawm evaporation kom tau txais lub siab HPMC khoom.
Lub Alkali Leaching ntau lawm txheej txheem ntawm hydroxypropylulose (HPMC) muaj ntau qhov zoo piv nrog lwm cov txheej txheem xws li etherification. Ib qho ntawm qhov zoo yog tias nws yog ib qho txheej txheem zoo ib puag ncig. Tsis zoo li lwm cov txheej txheem, cov alkali Leaching txoj kev ntau lawm tsis siv Halogenated cov kuab tshuaj uas muaj kev phom sij rau ib puag ncig thiab kev noj qab haus huv.
Lwm qhov zoo dua ntawm hom no yog kev tsim cov high-purity hpmc cov khoom lag luam. Kev tswj hwm cov tshuaj tiv thaiv kev ua kom ntseeg tau tias cov khoom kawg yog yam zoo thiab haum rau ntau yam kev siv.
Kev siv HPMC hauv kev lag luam HPMC yog qhov tseem ceeb rau kev tsim cov ntsiav tshuaj, tsiav tshuaj thiab lwm cov ntawv ntau npaum li cas. HPMC tuaj yeem siv los ua cov phau ntawv, tsis sib haum xeeb, tus neeg sawv cev, thiab lwm yam. Kev siv HPMC nyob rau hauv daim ntawv no kom ntseeg tau tias cov tshuaj ntau thiab ua tau zoo.
HPMC kuj tseem siv los ua cov tuab tuab, emulsifier thiab stabilizer nyob hauv kev lag luam khoom noj. Kev siv HPMC hauv cov khoom noj khoom noj ua kom muaj kev ntxhib los mos, viscosity thiab ua tau zoo.
Hauv kev tsim kho kev tsim kho, HPMC yog siv los ua kev tso cai ntxiv los txhim kho cov haujlwm, kom dej rov qab thiab ua kom tau txais kev sib tsoo ntawm cov cement. Kev siv HPMC kom ntseeg tau tias cov khoom siv tsim kho yog cov qauv zoo thiab ua tau raws li cov qauv yuav tsum tau ua.
Hauv cov ntsiab lus, lub alkali leaching ntau lawm txheej txheem ntawm hydroxypropyf metylropenge thiab tau dav siv nyob rau hauv ntau yam kev lag luam xws li kws tshuaj, thiab kev tsim kho. Kev siv HPMC hauv cov ntawv thov no kom ntseeg tau tias cov khoom yog qhov ua tau zoo thiab ua tau raws li cov qauv yuav tsum tau ua. Txoj kev ntau lawm no tseem muaj ib puag ncig ua phooj ywg thiab ua rau muaj cov khoom lag luam HPM ntau.
Lub Sijhawm Post: Sep-15-2023