Yenziwa ngani i-hydroxypropyl methylcellulose?

IHydroxypropyl methylcellulose (HPMC) iwukwenziwa, i-polymer encibilika emanzini etholakala ku-cellulose. Kuyimpushana emhlophe, engenaphunga, enganambitheki esetshenziswa kakhulu 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.