Ndeupi rudzi rwepolymer inonzi HPMC?

HPMC, kana hydroxypropyl methylcellulose, imhando ye cellulose-based polymer iyo inoshandiswa zvakanyanya mumaindasitiri emishonga, chikafu, uye ega ega. Cellulose ipolymer yechisikigo inowanikwa muzvirimwa uye ndiyo yakanyanya kuwanda kwazvo pasi pano. Iyo mutsara wepolymer inoumbwa neglucose monomers inobatanidzwa ne β(1→4) glycosidic bond.

HPMC inogadzirwa nekemikari inoshandura cellulose ine angave methyl kana hydroxypropyl mapoka. Aya magadzirirwo anogona kuitwa nekuita selulosi neakakodzera reagents pamberi peiyo acid catalyst. Kuita pakati pe cellulose nemethyl chloride kana methyl bromide inoburitsa methylcellulose, nepo kuita pakati peselulosi nepropylene oxide kunoburitsa hydroxypropyl cellulose. HPMC inogadzirwa nekubatanidza maitiro maviri aya kuunza mapoka ese emethyl uye hydroxypropyl pane cellulose musana.

Iyo polima inoguma ine chimiro chakaomarara chinogona kusiyana zvichienderana nehuwandu hwekutsiva (DS) yemethyl uye hydroxypropyl mapoka. DS inoreva huwandu hweavhareji yemapoka ehydroxyl anotsiviwa pachikamu cheanhydroglucose mumusana we cellulose. Kazhinji, HPMC ine DS ye1.2 kusvika 2.5 yemapoka emethyl uye 0.1 kusvika 0.3 yemapoka ehydroxypropyl. Mamiriro eHPMC anowedzera kuomeswa nenyaya yekuti mapoka emethyl nehydroxypropyl anogona kugovaniswa zvisina tsarukano parutivi rweselulosi musana, zvichikonzera heterogeneous polymer ine huwandu hwezvivakwa.

HPMC ipolymer inonyungudika mumvura inoumba chinhu chakafanana nejeri kana ichinge yaiswa mvura. Iyo gelation zvivakwa zveHPMC zvinoenderana nezvakati wandei, zvinosanganisira iyo DS, huremu hwemamorekuru, uye kuwanda kwepolymer. Kazhinji, HPMC inoumba gel yakagadzikana pamatunhu akakwirira uye ine yakakwirira DS kukosha. Uye zvakare, iyo gelation zvimiro zveHPMC zvinogona kufurirwa neiyo pH, ionic simba, uye tembiricha yemhinduro.

Iyo yakasarudzika zvimiro zveHPMC inoita kuti ive chinhu chakakosha mukushandisa kwakawanda. Muindasitiri yemishonga, HPMC inoshandiswa sebhainda, disintegrant, uye mugadziri wemufirimu mumapiritsi nemakapisi. Inogonawo kushandiswa kushandura chiyero chekusunungurwa kwemishonga kubva pafomu yepimo. Muindasitiri yechikafu, HPMC inoshandiswa seyakakora, stabilizer, uye emulsifier. Inowanzoshandiswa muzvokudya zvakaderera-mafuta kana zvakaderedzwa-calori kutevedzera manyorerwo uye muromo wezvokudya zvakakwirira zvemafuta. Muindasitiri yekuchengeta munhu, HPMC inoshandiswa seyakakora, yekugadzira firimu, uye emulsifier mumashampoos, lotions, uye zvimwe zvigadzirwa.

Mukupedzisa, HPMC ndeye cellulose-based polymer iyo inogadzirwa nekemikari inogadzirisa cellulose ine methyl uye hydroxypropyl mapoka. Iyo polima inokonzeresa inonyungudika mumvura uye ine chimiro chakaoma chinogona kusiyana zvichienderana nehuwandu hwekutsiva uye kugoverwa kwemapoka emethyl nehydroxypropyl. HPMC ipolymer inoshanda zvakasiyana-siyana ine zvakawanda zvekushandisa mumishonga, chikafu, uye maindasitiri ekuchengeta munhu.