Kusiyana pakati pa hydroxypropyl starch ether ndi cellulose ether

Tsopano anthu ambiri sadziwa zambiri za hydroxypropyl starch ether. Iwo amaganiza kuti pali kusiyana kochepa pakati pa hydroxypropyl starch ether ndi wowuma wamba, koma sichoncho. Kuchuluka kwa hydroxypropyl starch ether yomwe imagwiritsidwa ntchito muzinthu zamatope ndizochepa kwambiri, ndipo kuchuluka kwa polar kumatha kukhala ndi zotsatira zabwino.

Hydroxypropyl starch ether (HPS) ndi ufa woyera wonyezimira womwe umapezeka mwa kusintha zomera zachilengedwe, zofewa kwambiri, kenako zowumitsidwa, popanda pulasitiki. Ndizosiyana kwambiri ndi wowuma wamba kapena wowuma wosinthidwa.

Ndipo hydroxypropyl methyl cellulose, wotchedwanso hypromellose, hydroxypropyl methyl wofiira vitamini efa, ndi ntchito kwambiri koyera thonje mapadi monga zopangira, ndi kuchichitira ndi lye pa 35-40 ° C kwa theka la ola, Finyani, kuphwanya mapadi, ndi zaka bwino pa 35 ° C, kotero kuti pafupifupi digiri ya ulusi ulusi analandira. Ikani ulusi wa alkali mu ketulo ya etherification, onjezerani propylene oxide ndi methyl chloride motsatizana, ndikuyimitsa pa 50-80 ° C kwa maola 5, ndipo kupanikizika kwakukulu kumakhala pafupifupi 1.8MPa. Kenaka yikani mlingo woyenera wa hydrochloric acid ndi oxalic acid m'madzi otentha pa 90 ° C kuti mutsuka zinthuzo kuti muwonjezere voliyumu, kenaka muwononge madzi ndi centrifuge, ndipo potsiriza muzitsuka mobwerezabwereza kuti musalowerere. Amagwiritsidwa ntchito pomanga, makampani opanga mankhwala, utoto, mankhwala, mafakitale ankhondo ndi madera ena, motero monga filimu-kupanga wothandizira, binder, dispersant, stabilizer, thickener, etc.

Hydroxypropyl starch ether atha kugwiritsidwa ntchito ngati chophatikizira cha zinthu zopangidwa ndi simenti, zopangidwa ndi gypsum ndi mankhwala a laimu a calcium. Zimagwirizana bwino ndi zosakaniza zina zomanga. Ntchito pamodzi ndi hydroxypropyl methylcellulose etha HPMC, akhoza kuchepetsa mlingo wa hydroxypropyl methylcellulose (zambiri kuwonjezera 0.05% ya HPS akhoza kuchepetsa mlingo wa HPMC ndi za 20% -30%), ndipo akhoza kuimba zotsatira thickening , kulimbikitsa dongosolo mkati, ndi kukana bwino ntchito ndi kusokoneza bwino.