Kodi fungo la hydroxypropyl methylcellulose limakhudza bwanji ubwino wake?

Kodi zotsatira za kukula kwa fungo pa hydroxypropyl methylcellulose ndi ziti?

Kupanga kwahydroxypropyl methylcellulose: Thirani cellulose yoyengedwa bwino ndi thonje pa 35-40°C kwa theka la ola, kanikizani, phwanyani cellulose, ndikukalamba bwino pa 35°C, kuti mlingo wapakati wa polymerization wa alkali womwe wapezeka ukhale mkati mwa ulusi wofunikira mkati. Ikani ulusi wa alkali mu ketulo ya etherification, onjezerani propylene oxide ndi methyl chloride motsatizana, ndikutentha pa 50-80°C kwa maola 5, kuthamanga kwakukulu ndi pafupifupi 1.8MPa. Kenako onjezerani kuchuluka koyenera kwa hydrochloric acid ndi oxalic acid m'madzi otentha pa 90°C kuti mutsuke zinthuzo kuti muwonjezere kuchuluka. Sungunulani madzi mu centrifuge. Tsukani ndi madzi mpaka zitakhala zopanda mpweya. Pamene chinyezi cha zinthuzo chili pansi pa 60%, chiume ndi mpweya wotentha pa 130°C mpaka chinyezi chili pansi pa 5%.

HPMC yopangidwa ndi njira yosungunulira imagwiritsa ntchito toluene ndi isopropanol ngati zosungunulira. Ngati kutsuka sikuli bwino, fungo lochepa lidzakhalabe. Pakadali pano, mtundu wa hydroxypropyl methylcellulose HPMC umasiyana kwambiri, ndipo mtengo wake umasiyana kwambiri, zomwe zimapangitsa kuti makasitomala asamasankhe bwino. Ili ndi vuto la kutsuka, silikhudza kugwiritsa ntchito ndipo palibe vuto, HPMC yoyera siyenera kununkhiza ammonia, starch ndi mowa;HPMCnthawi zambiri imatha kununkhiza fungo la mitundu yonse, ngakhale litakhala lopanda kukoma, limamveka lolemera. Komabe, hydroxypropyl methylcellulose yopangidwa ndi opanga ambiri ili ndi fungo lamphamvu kwambiri komanso fungo lokhazika mtima pansi. Ubwino wake suli wofanana ndi wabwino.

Hypromellose imapezeka poika thonje loyengedwa ndi madzi osowa kuti ipange alkaline cellulose, kenako n’kuwonjezera solvent, etherification agent, toluene, ndi isopropanol kuti igwire bwino ntchito, kutsuka, kuumitsa, kuphwanya, ndi zina zotero kuti ipeze zinthu zomalizidwa. Chabwino, padzakhala fungo, kotero ogwiritsa ntchito akhoza kuligwiritsa ntchito molimba mtima.