Ta yaya ƙamshin hydroxypropyl methylcellulose ke shafar ingancinsa?

Menene tasirin girman wari akan hydroxypropyl methylcellulose:

Tsarinhydroxypropyl methylcellulose: A shafa cellulose na auduga mai tsafta da ruwan leda a zafin 35-40°C na rabin sa'a, a danna, a murƙushe cellulose, sannan a tsufa da kyau a zafin 35°C, don matsakaicin matakin polymerization na alkali da aka samu ya kasance cikin zaruruwan da ake buƙata a ciki. A saka zare na alkali a cikin kettle na etherification, a ƙara propylene oxide da methyl chloride a jere, sannan a tace a zafin 50-80°C na tsawon awanni 5, matsakaicin matsin lamba shine kusan 1.8MPa. Sannan a ƙara adadin hydrochloric acid da oxalic acid a cikin ruwan zafi a zafin 90°C don wanke kayan don faɗaɗa ƙarar. A busar da ruwa a cikin centrifuge. A wanke da ruwa har sai ya yi tsaka tsaki. Lokacin da danshi na kayan ya yi ƙasa da kashi 60%, a busar da shi da ruwan zafi a zafin 130°C har sai danshi ya yi ƙasa da kashi 5%.

HPMC da aka samar ta hanyar narkewar abinci yana amfani da toluene da isopropanol a matsayin sinadarai masu narkewa. Idan wanke-wanke bai yi kyau ba, wani ɗan ƙamshi kaɗan zai kasance. A halin yanzu, ingancin hydroxypropyl methylcellulose HPMC na cikin gida ya bambanta sosai, kuma farashin ya bambanta sosai, wanda hakan ke sa ya yi wa abokan ciniki wahala su zaɓi abin da ya dace. Wannan ita ce matsalar tsarin wanke-wanke, ba ta shafar amfani da shi kuma babu matsala, tsarkin HPMC bai kamata ya ji ƙamshin ammonia, sitaci da barasa ba;HPMCSau da yawa yana iya jin ƙamshi iri-iri, ko da ba shi da ɗanɗano, zai ji nauyi. Duk da haka, hydroxypropyl methylcellulose da masana'antun da yawa ke samarwa yana da ƙamshi mai ƙarfi da ƙamshi mai kaifi. Tabbas ingancinsa bai kai matsayin da ake so ba.

Ana samun Hypromellose ta hanyar sanya auduga mai kyau da ruwa mai ɗanɗano don samun sinadarin alkaline cellulose, sannan a ƙara sinadarin narkewa, sinadarin etherification, toluene, da isopropanol don amsawar etherification, a rage wanki, a busar da shi, a niƙa shi, da sauransu don samun kayayyakin da aka gama. To, za a sami ƙamshi, don haka masu amfani za su iya amfani da shi da kwarin gwiwa.