Ivela phi ihydroxypropyl methylcellulose?

IHydroxypropyl methylcellulose (HPMC) yipolymer yokwenziwa ethathwe kwi-cellulose, eyipolymer eyenzeka ngokwemvelo eyenza iindonga zeeseli zezityalo. I-HPMC yenziwa ngokuguqula iikhemikhali iselulosi ngenkqubo ebizwa ngokuba yi-etherification.

Kwi-etherification, i-cellulose iphathwa ngomxube we-propylene oxide kunye ne-methyl chloride phantsi kweemeko ezilawulwayo ukuvelisa i-hydroxypropyl cellulose (HPC). I-HPC iphinda iguqulwe ngokuyinyanga nge-methanol kunye ne-hydrochloric acid ukuvelisa i-HPMC.

Imveliso ye-HPMC enesiphumo yi-soluble yamanzi, i-polymer engekho i-ionic eneempawu ezininzi eziluncedo, ezifana nokugcinwa kwamanzi aphezulu, isakhono esihle sokwenza ifilimu, kunye neempawu ezibalaseleyo zokujiya kunye nokuzinzisa. Ezi propati zenza i-HPMC ibe yinto yokongeza eluncedo kuluhlu olubanzi lwezicelo, ezifana nemathiriyeli yokwakha, amayeza, kunye neemveliso zokutya.

Ngelixa i-HPMC ithathwa kwi-cellulose, yipolymer yokwenziwa eveliswa ngenkqubo yekhemikhali entsonkothileyo.