Ivelaphi i-hydroxypropyl methylcellulose?

IHydroxypropyl methylcellulose (HPMC) iyi-polymer yokwenziwa etholakala ku-cellulose, okuyi-polymer eyenzeka ngokwemvelo eyakha izindonga zamangqamuzana ezitshalo.I-HPMC yenziwa ngokushintsha i-cellulose ngamakhemikhali ngenqubo ebizwa ngokuthi i-etherification.

Ku-etherification, i-cellulose iphathwa ngengxube ye-propylene oxide ne-methyl chloride ngaphansi kwezimo ezilawulwayo ukuze kukhiqizwe i-hydroxypropyl cellulose (HPC).I-HPC iphinde ilungiswe ngokuyelapha nge-methanol ne-hydrochloric acid ukuze kukhiqizwe i-HPMC.

Umphumela womkhiqizo we-HPMC uyi-polymer encibilika emanzini, engeyona i-ionic enezinto eziningi eziwusizo, njengokugcinwa kwamanzi amaningi, ikhono elihle lokwenza ifilimu, kanye nezakhiwo ezinhle kakhulu zokujiya nokuzinza.Lezi zakhiwo zenza i-HPMC ibe isithasiselo esiwusizo ezinhlobonhlobo zezinhlelo zokusebenza, njengezinto zokwakha, imithi, nemikhiqizo yokudla.

Nakuba i-HPMC isuselwa ku-cellulose, iyi-polymer yokwenziwa ekhiqizwa ngenqubo yamakhemikhali eyinkimbinkimbi.