IHydroxypropyl methylcellulose (HPMC)ifilimu inomsebenzi ogqwesileyo, kodwa ngenxa yokuba i-HPMC i-gel ye-thermal, i-viscosity kwiqondo lokushisa eliphantsi liphantsi kakhulu, elingenakulungele ukugquma (okanye ukudipha) kunye nokumisa kwiqondo lokushisa eliphantsi ukulungiselela ifilimu edliwayo, okubangela ukusebenza kakubi kokucubungula; ukongeza, iindleko zayo eziphezulu zinciphisa ukusetyenziswa kwayo. I-Hydroxypropyl starch (HPS) i-gel ebandayo ephantsi kwexabiso eliphantsi, ukongezwa kwayo kunokunyusa i-viscosity ye-HPMC kwiqondo lokushisa eliphantsi, ukuphucula ukusebenza kwe-HPMC, kunye nokunciphisa iindleko zokuvelisa, ngakumbi, i-hydrophilicity efanayo , iiyunithi ze-glucose kunye namaqela e-hydroxypropyl bonke banegalelo ekuphuculeni ukuhambelana kwezi zimbini ze-polymers. Ngoko ke, inkqubo yokuxuba ijeli eshushu-ebandayo yalungiswa ngokuxuba i-HPS kunye ne-HPMC, kunye nefuthe lobushushu kwisakhiwo sejeli ye-HPMC / HPS inkqubo yokudibanisa ijeli eshushu ebandayo yafundwa ngokucwangcisiweyo ngokusebenzisa i-rheometer kunye ne-angle encinci ye-X-ray yokusabalalisa ubuchule. , idibaniswe nefuthe leemeko zonyango lobushushu kwi-microstructure kunye neepropati zenkqubo ye-membrane, kwaye emva koko yakha ubudlelwane phakathi kwesakhiwo sejel se-blend system-membrane structure-membrane properties phantsi kweemeko zonyango lobushushu.
Iziphumo zibonisa ukuba kwiqondo lokushisa eliphezulu, ijeli ephezuluHPMCumxholo unemodyuli ephezulu kunye nokuziphatha okubaluleke ngakumbi okufana nokuqina, ubume obufanayo be-gel scatterers buxinene, kwaye ubukhulu be-gel aggregates bukhulu; kwiqondo lobushushu eliphantsi, umxholo we-HPS Iisampuli zejeli eziphakamileyo zinemodyuli ephezulu, ukuziphatha okuqinileyo okuqaqambe ngakumbi, kunye nesakhiwo esixineneyo esifana nesakheli sejeli. Kwiisampulu ezinomlinganiselo ofanayo wokudibanisa, imodyuli kunye nokubaluleka kokuziphatha okuqinileyo kunye nokuxinana kwesakhiwo esifana nqwa kweegels ezilawulwa yi-HPMC kwiqondo lokushisa eliphezulu ziphezulu kunezo zilawulwa yi-HPS kwiqondo lokushisa eliphantsi. Iqondo lokushisa lokumisa linokuchaphazela ukwakheka kwejeli yenkqubo ngaphambi kokumisa, kwaye emva koko kuchaphazele i-crystalline structure kunye nesakhiwo se-amorphous yefilimu, kwaye ekugqibeleni ibe nefuthe elibalulekileyo kwiipropati ze-mechanical zefilimu, okubangela ukuba amandla okuqina kunye nemodyuli yefilimu yomiswe kwiqondo lokushisa eliphezulu. Iphezulu kunokomisa kwiqondo lokushisa eliphantsi. Izinga lokupholisa alinayo impembelelo ecacileyo kwi-crystalline structure yenkqubo, kodwa inefuthe kubuninzi be-microdomain self-similar body of the film. Kule nkqubo, ukuxinana kwesakhiwo esifanayo sefilimu kunokuchaphazela iimpawu zemishini yefilimu. Ukusebenza kunempembelelo enkulu.
Ngokusekelwe kulungiselelo lwe-membrane edibeneyo, uphononongo lufumene ukuba ukusetyenziswa kwesisombululo se-iodine ekukhetheni ukudaya i-HPMC / HPS ye-membrane edibeneyo yaseka indlela entsha yokujonga ngokucacileyo ukuhanjiswa kwesigaba kunye nokutshintshwa kwesigaba senkqubo edibeneyo phantsi kwe-microscope. indlela, enentsingiselo yesikhokhelo se-methodological kuphononongo lokusasazwa kwesigaba seenkqubo zomxube ezisekelwe kwistatshi. Ukusebenzisa le ndlela entsha yophando, idibene ne-infrared spectroscopy, ukuskena i-electron microscopy kunye ne-extensometer, ukuguqulwa kwesigaba, ukuhambelana kunye neempawu zomatshini zenkqubo zahlaziywa kwaye zafundwa, kunye nokuhambelana, ukuguqulwa kwesigaba kunye nokubonakala kwefilimu kwakhiwe. ubudlelwane phakathi komsebenzi. Iziphumo zokujonga i-microscope zibonisa ukuba inkqubo idlula kwinguqu yesigaba xa umlinganiselo we-HPS u-50%, kwaye i-interphase mixing phenomenon ikhona kwifilimu, ebonisa ukuba inkqubo inomlinganiselo othile wokuhambelana; i-infrared, uhlalutyo lwe-thermogravimetric kunye neziphumo ze-SEM ziqinisekisa ngakumbi ukudibanisa. Inkqubo inomlinganiselo othile wokuhambelana. Imodyuli yefilimu edibeneyo iyatshintsha xa umxholo we-HPS ungama-50%. Xa iHPSumxholo mkhulu kunama-50%, i-angle yoqhagamshelwano yesampula edibeneyo iyaphambuka kumgca ochanekileyo odibanisa ii-angles zoqhagamshelwano zeesampuli ezicocekileyo, kwaye xa ingaphantsi kwe-50%, iyaphambuka kakubi kulo mgca ochanekileyo. , ezibangelwa ikakhulu kukutshintsha kwesigaba.
Ixesha lokuposa: Apr-25-2024