Hydroxypropyl methylcellulose (HPMC) wani fili ne na multifunctional da ake amfani da shi a masana'antu daban-daban saboda nau'in sinadarai na musamman da kaddarorinsa.
1. Abubuwan sinadaran:
a. Kashin baya na Cellulose:
HPMC wani nau'in cellulose ne, wanda ke nufin an samo shi daga cellulose, polysaccharide na halitta wanda aka samo a cikin ganuwar kwayoyin halitta. Cellulose ya ƙunshi maimaita raka'a na β-D-glucose da aka haɗa ta β(1→4) glycosidic bonds.
b. Sauya:
A cikin HPMC, an maye gurbin ƙwayar hydroxyl (-OH) na kashin bayan cellulose tare da methyl da ƙungiyoyin hydroxypropyl. Wannan maye yana faruwa ta hanyar amsawar etherification. Matsayin maye gurbin (DS) yana nufin matsakaicin adadin ƙungiyoyin hydroxyl da aka maye gurbinsu da rukunin glucose a cikin sarkar cellulose. DS na methyl da hydroxypropyl kungiyoyin sun bambanta, wanda ke shafar aikin HPMC.
2. Haɗin kai:
a. Etherification:
An haɗa HPMC ta hanyar etherification dauki na cellulose tare da propylene oxide da methyl chloride. Tsarin ya ƙunshi amsawar cellulose tare da propylene oxide don gabatar da ƙungiyoyin hydroxypropyl sannan tare da methyl chloride don gabatar da ƙungiyoyin methyl.
b. Matsayin madadin sarrafawa:
Ana iya sarrafa DS na HPMC ta hanyar daidaita yanayin amsawa kamar zazzabi, lokacin amsawa, da maida hankali.
3. Ayyuka:
a. Solubility:
HPMC yana narkewa cikin ruwa da wasu kaushi na halitta, kamar methanol da ethanol. Koyaya, solubility ɗin sa yana raguwa tare da haɓaka nauyin kwayoyin halitta da matakin maye gurbinsa.
b. Samuwar fim:
HPMC yana samar da fim mai haske, mai sassauci lokacin da aka narkar da shi cikin ruwa. Waɗannan fina-finai suna da kyakkyawan ƙarfin injina da kaddarorin shinge.
C. Dankowa:
Maganin HPMC suna nuna halayen pseudoplastic, ma'ana cewa ɗankowar su yana raguwa tare da haɓaka ƙimar ƙarfi. Dangancin mafita na HPMC ya dogara da dalilai kamar su maida hankali, nauyin kwayoyin halitta, da digiri na maye gurbin.
d. Riƙewar ruwa:
Ɗaya daga cikin mahimman kaddarorin HPMC shine ikonsa na riƙe ruwa. Wannan kadarar tana da mahimmanci a aikace-aikace daban-daban kamar kayan gini, inda ake amfani da HPMC azaman mai kauri da mai riƙe ruwa.
e. Adhesion:
Ana amfani da HPMC sau da yawa azaman abin ɗamara a masana'antu daban-daban saboda ikonsa na samar da ɗakoki mai ƙarfi zuwa sassa daban-daban.
4. Aikace-aikace:
a. Masana'antar harhada magunguna:
A cikin magunguna, ana amfani da HPMC azaman mai ɗaure, wakili mai suturar fim, wakili mai sarrafawa, da mai gyara danko a cikin ƙirar kwamfutar hannu.
b. Masana'antar gine-gine:
Ana ƙara HPMC zuwa turmi na tushen siminti, filasta na tushen gypsum da adhesives na tayal don haɓaka iya aiki, riƙe ruwa da mannewa.
C. masana'antar abinci:
A cikin masana'antar abinci, ana amfani da HPMC azaman mai kauri, stabilizer da emulsifier a cikin samfura kamar miya, riguna da ice cream.
d. Kayayyakin kula da mutum:
Ana amfani da HPMC azaman mai kauri, emulsifier da wakili mai samar da fim a cikin samfuran kulawa na sirri kamar shamfu, lotions da creams.
e. Paints da Rubutun:
A cikin fenti da sutura, ana amfani da HPMC don haɓaka rarrabuwar launi, sarrafa danko da riƙe ruwa.
Hydroxypropylmethylcellulose (HPMC) wani abu ne mai mahimmanci tare da aikace-aikace masu yawa a cikin masana'antu daban-daban. Abubuwan da ke tattare da sinadarai na musamman, haɓakawa da kaddarorin sa sun sa ya zama muhimmin sashi a cikin magunguna, kayan gini, abinci, samfuran kulawa na sirri da fenti/rufi. Fahimtar kaddarorin HPMC yana ba da damar aikace-aikacen da aka keɓance a fagage daban-daban, yana ba da gudummawa ga yaɗuwar amfani da mahimmanci a cikin hanyoyin masana'antu na zamani.
Lokacin aikawa: Fabrairu-22-2024