Kodi kununkhira kwa hydroxypropyl methylcellulose kumakhudza bwanji khalidwe?

Kodi zotsatira za kukula kwa fungo pa hydroxypropyl methylcellulose ndi chiyani:

Kaphatikizidwe wahydroxypropyl methylcellulose: Kuchitira woyengeka thonje mapadi ndi lye pa 35-40 ° C kwa theka la ola, akanikizire, kuphwanya mapadi, ndi zaka bwino pa 35 ° C, kotero kuti pafupifupi digiri ya polymerization wa anapeza alkali ndi mkati chofunika ulusi osiyanasiyana mkati. Ikani ulusi wa alkali mu ketulo ya etherification, onjezerani propylene oxide ndi methyl chloride motsatizana, ndipo etherify pa 50-80 ° C kwa maola 5, kupanikizika kwakukulu kumakhala pafupifupi 1.8MPa. Kenaka yikani mlingo woyenera wa hydrochloric acid ndi oxalic acid kumadzi otentha pa 90 ° C kuti mutsuke zinthuzo kuti muwonjezere voliyumu. Dehydrate mu centrifuge. Sambani ndi madzi mpaka osalowerera ndale. Chinyezi chikakhala chochepera 60%, chiwume ndi mpweya wotentha pa 130 ° C mpaka chinyezi chikhale chochepera 5%.

HPMC yopangidwa ndi njira yosungunulira imagwiritsa ntchito toluene ndi isopropanol ngati zosungunulira. Ngati kuchapa sikuli bwino, fungo lina losamveka limakhalabe. Pakali pano, khalidwe la zoweta hydroxypropyl methylcellulose HPMC zimasiyanasiyana kwambiri, ndipo mtengo zimasiyanasiyana ambiri, kupangitsa kukhala kovuta kwa makasitomala kusankha bwino. Ili ndilo vuto la kuchapa, silimakhudza ntchito ndipo palibe vuto, HPMC yoyera sayenera kununkhiza ammonia, wowuma ndi mowa; WachigololoMtengo wa HPMCnthawi zambiri imatha kununkhiza mitundu yonse ya fungo, ngakhale itakhala yosakoma, imamva kulemera. Komabe, hydroxypropyl methylcellulose yopangidwa ndi opanga ambiri imakhala ndi fungo lamphamvu komanso fungo loyipa. Ubwino wake suli wofanana.

Hypromellose ndi akamagwira impregnating thonje woyengeka ndi osowa madzi kupeza zamchere mapadi, ndiye kuwonjezera zosungunulira, etherification wothandizila, toluene, ndi isopropanol chifukwa etherification anachita, neutralizing kutsuka, kuyanika, kuphwanya, etc. kupeza zomalizidwa. Chabwino, padzakhala fungo, kotero ogwiritsa ntchito angagwiritse ntchito molimba mtima.