Hydroxypropylmethylcellulose (HPMC) polymer ne mai aiki da yawa wanda aka samo daga cellulose na halitta. Ana amfani da shi a masana'antu iri-iri, ciki har da magunguna, abinci, gine-gine da kayan shafawa. Samar da HPMC ya ƙunshi nau'ikan albarkatun ƙasa da tsari mai matakai da yawa.
Cellulose:
Tushen: Babban albarkatun HPMC shine cellulose, hadadden carbohydrate da ake samu a ganuwar tantanin halitta. Mafi yawan tushen cellulose don samar da HPMC shine ɓangaren litattafan almara na itace, amma ana iya amfani da wasu hanyoyin kamar su auduga.
Shiri: Cellulose yawanci ana bi da shi don cire ƙazanta sannan a sarrafa shi zuwa wani nau'i mai dacewa don ƙarin gyarawa.
Tushen:
Nau'in: Sodium hydroxide (NaOH) ko potassium hydroxide (KOH) galibi ana amfani dashi azaman tushe yayin farkon matakan samarwa na HPMC.
Aiki: Ana amfani da Alkali don maganin cellulose, yana haifar da kumburi da lalata tsarinsa. Wannan tsari, wanda ake kira alkalization, yana shirya cellulose don ƙarin halayen.
Alkali etherifying wakili:
Wakilin Hydroxypropylating: Ana amfani da Propylene oxide sau da yawa don shigar da ƙungiyoyin hydroxypropyl a cikin kashin bayan cellulose. Wannan mataki yana ba da solubility da sauran abubuwan da ake so ga cellulose.
Methylating agents: Methyl chloride ko dimethyl sulfate ana amfani da su sau da yawa don gabatar da ƙungiyoyin methyl akan tsarin cellulose, ta haka ne ke haɓaka kaddarorinsa gaba ɗaya.
Wakilin methylation:
Methanol: Methanol yawanci ana amfani dashi azaman mai ƙarfi da mai amsawa a cikin hanyoyin methylation. Yana taimakawa gabatar da ƙungiyoyin methyl a cikin sarƙoƙin cellulose.
Hydroxypropylating wakili:
Propylene oxide: shine mabuɗin albarkatun ƙasa don shigar da ƙungiyoyin hydroxypropyl cikin cellulose. Halin da ke tsakanin propylene oxide da cellulose yana faruwa a ƙarƙashin yanayin sarrafawa.
mai kara kuzari:
Acid Catalyst: Ana amfani da mai haɓaka acid, irin su sulfuric acid, don haɓaka halayen etherification. Suna taimakawa sarrafa ƙimar amsawa da kaddarorin samfur.
Mai narkewa:
Ruwa: Ana amfani da ruwa sau da yawa azaman sauran ƙarfi a matakai daban-daban na tsarin samarwa. Yana da mahimmanci don narkar da masu amsawa da haɓaka halayen da ke tsakanin cellulose da etherifying jamiái.
Neutralizer:
Sodium hydroxide (NaOH) ko potassium hydroxide (KOH): ana amfani da su don kawar da abubuwan haɓaka acid da daidaita pH yayin haɗuwa.
tsarkakewa:
Tace Aids: Ana iya amfani da nau'ikan kayan aikin tacewa don cire ƙazanta da samfuran da ba'a so daga gaurayar amsa.
Abubuwan wanke-wanke: Yin wanka da ruwa ko wasu kaushi yana taimakawa cire ragowar sinadarai da ƙazanta daga samfurin ƙarshe.
Desiccant:
Shan iska ko tanda: Bayan tsarkakewa, samfurin na iya zama iska ko tanda da bushewa don cire sauran ƙarfi da danshi.
Wakilin kula da inganci:
Analytical Reagents: Ana amfani da reagents iri-iri don dalilai masu inganci don tabbatar da cewa samfuran HPMC sun cika aikin da ake buƙata da ƙayyadaddun bayanai.
Samar da hydroxypropyl methylcellulose ya ƙunshi gyaggyarawa cellulose ta jerin halayen sinadarai. Raw kayan sun hada da cellulose, alkali, etherifying wakili, mai kara kuzari, sauran ƙarfi, neutralizing wakili, tsarkakewa wakili da desiccant, wanda taka muhimmiyar rawa a cikin kira tsari. Takamaiman yanayi da reagents da aka yi amfani da su na iya bambanta dangane da kaddarorin da ake so da aikace-aikacen samfurin hydroxypropyl methylcellulose na ƙarshe.
Lokacin aikawa: Dec-21-2023