Yenziwa ngani i-hydroxypropyl methylcellulose?

IHydroxypropyl methylcellulose (HPMC) iwukwenziwa, i-polymer encibilika emanzini etholakala ku-cellulose.Kuyimpushana emhlophe, engenaphunga, enganambitheki esetshenziswa kabanzi njenge-ejenti ejiyayo, i-emulsifier, ifilimu yangaphambili, kanye ne-stabilizer ezimbonini eziningi, ezihlanganisa ezemithi, ukudla, izimonyo, nezokwakha.

I-HPMC yenziwa ngokuphendula i-cellulose nge-propylene oxide ne-methyl chloride.I-Cellulose iyi-polysaccharide eyingxenye eyinhloko yezindonga zamangqamuzana ezitshalo futhi iyinhlanganisela yezinto eziphilayo egcwele kakhulu eMhlabeni.I-Propylene oxide iyinhlanganisela ye-organic ene-chemical formula CH3CHCH2O.I-Methyl chloride iyigesi engenambala, evuthayo nephunga elimnandi.

Ukusabela kwe-cellulose nge-propylene oxide ne-methyl chloride kubangela ukwakheka kwamaqembu e-hydroxypropyl, anamathele kuma-molecule e-cellulose.Le nqubo yaziwa ngokuthi i-hydroxypropylation.Amaqembu e-hydroxypropyl andisa ukuncibilika kwe-cellulose emanzini, okwenza kube lula ukusetshenziselwa izinhlelo zokusebenza ezihlukahlukene.

I-HPMC isetshenziswa kabanzi embonini yezemithi njenge-binder, i-disintegrant, kanye ne-ejenti yokumisa okwesikhashana kumaphilisi namaphilisi.Ibuye isetshenziswe njenge-thickener kanye ne-emulsifier kumakhilimu nama-lotions, nanjengefilimu yangaphambili yamaconsi esweni.Embonini yokudla, isetshenziswa njenge-thickener, stabilizer, ne-emulsifier kumasoso, okokugqoka, neminye imikhiqizo yokudla.Embonini yezokwakha, isetshenziswa njengesibopho kusimende nosimende, nanjengentokozo engangeni emanzini ezindongeni naphansi.

I-HPMC iwumsebenzi ophephile futhi ongenabo ubuthi ogunyazwe i-US Food and Drug Administration (FDA) ukuze usetshenziswe ekudleni, emithini yemithi, nasezimonyoni.Igunyazwe futhi yi-European Union (EU) ukuthi isetshenziswe ekudleni nasezikhemisi.