Methylcellulose fari ne ko fari-farin fibrous ko granular foda; mara wari da ban sha'awa. Wannan samfurin yana kumbura a cikin bayani mai haske ko ɗan turbid colloidal a cikin ruwa; ba shi da narkewa a cikin cikakken ethanol, chloroform ko ether. Da sauri tarwatsa kuma kumbura a cikin ruwan zafi a 80-90 ° C, kuma narke da sauri bayan sanyi. Maganin ruwa mai ruwa yana da kwanciyar hankali a dakin da zafin jiki, kuma zai iya gel a babban zafin jiki, kuma gel zai iya canzawa tare da bayani tare da zafin jiki.
Yana da kyau kwarai wettability, dispersibility, adhesiveness, thickening, emulsification, ruwa riƙewa da kuma film-forming Properties, da impermeability ga man fetur. Fim ɗin da aka kafa yana da kyakkyawan tauri, sassauci da bayyana gaskiya. Saboda ba shi da ionic, yana iya dacewa da sauran emulsifiers, amma yana da sauƙi don fitar da gishiri, kuma maganin ya tsaya a cikin kewayon PH2-12. Sodium Carboxymethyl Cellulose Wannan samfurin shine gishirin sodium na cellulose carboxymethyl ether, wanda shine anionic cellulose ether, fari ko madarar fari fibrous foda ko granules, tare da yawa na 0.5-0.7 g / cm3, kusan wari da m , tare da hygroscopicity. A sauƙaƙe tarwatsa cikin ruwa don samar da maganin colloidal na gaskiya, wanda ba zai iya narkewa a cikin kaushi mai ƙarfi kamar ethanol.
pH na maganin ruwa shine 6.5-8.5. Lokacin da pH ya kasance> 10 ko <5, danko na manne za a ragu sosai, kuma aikin shine mafi kyau lokacin da pH ya kasance 7. Stable zuwa zafi, danko yana tashi da sauri a ƙasa 20 ° C, kuma yana canzawa a hankali a 45. °C. Dumama na dogon lokaci sama da 80 ° C na iya hana colloid kuma rage danko da aiki sosai. Yana da sauƙin narkewa a cikin ruwa, kuma maganin yana da kyau; yana da tsayayye sosai a cikin maganin alkaline, amma yana da sauƙin ruwa lokacin da ya ci karo da acid, kuma zai yi hazo lokacin da ƙimar pH ta kai 2-3, kuma zai amsa da gishirin ƙarfe na polyvalent. Hydroxypropyl methylcellulose, wanda kuma aka sani da hypromellose da cellulose hydroxypropyl methyl ether, an yi shi da cellulose mai tsafta mai tsafta a matsayin albarkatun kasa, wanda aka keɓe musamman a ƙarƙashin yanayin alkaline.
Mai narkewa a cikin ruwa da mafi yawan iyakacin duniya c da kuma daidai gwargwado na ethanol / ruwa, propanol / ruwa, dichloroethane, da dai sauransu, wanda ba zai iya narkewa a cikin ether, acetone, cikakken ethanol, kuma ya kumbura a cikin wani fili ko dan kadan mai girgije colloid a cikin ruwan sanyi bayani. Maganin ruwa mai ruwa yana da aiki na saman, babban nuna gaskiya da aikin barga. HPMC yana da mallakar thermal gelation. Maganin ruwa na samfurin yana mai zafi don samar da gel kuma yana hazo, sannan ya narke bayan sanyaya. Yanayin gelation na ƙayyadaddun bayanai daban-daban ya bambanta.
Lokacin aikawa: Fabrairu-24-2023