IHydroxypropyl methylcellulose (HPMC) sisongezo sekhemikhali esisetyenziswa ngokubanzi kwimveliso yodaka lomxube omanzi. Le ngqungquthela ye-ether ye-cellulose ineepropati ezikhethekileyo eziphucula ukusebenza, ukuqina kunye nokusebenza kodaka. Umsebenzi ophambili we-HPMC kukwandisa ukugcinwa kwamanzi kunye nokunamathela, ngaloo ndlela kuphuculwa ukukwazi ukubopha udaka.
1. Ukuphucula ukusebenza
Ukusetyenzwa kodaka lomxube omanzi kubhekiselele kubuchule bawo bokuphathwa ngokulula kunye nokugalelwa ngexesha lokwakha. Le yipropati ebalulekileyo yokuqinisekisa ukuba udaka kulula ukuxuba, ukuthululela kunye nokwenza. I-HPMC isebenza njenge-plasticizer ngokubonelela ngobungakanani obufanelekileyo bokugcinwa kwamanzi kunye ne-viscosity kumdaka. Ngokudityaniswa kwe-HPMC, udaka luba yi-viscous ngakumbi, luvumela ukuba lunamathele kwaye lube ngcono.
Isiphumo se-HPMC ekusebenzeni kodaka kunokubalelwa kwisakhono saso sokujiya kunye nokuguqula i-rheology yomxube. Ngokwandisa i-viscosity yomxube, i-HPMC yenza ukuba ihambe kakuhle kwaye inciphise naluphi na utyekelo lokwahlula okanye ukopha. I-rheology ephuculweyo yomxube iphinda incede ukunciphisa i-viscosity yodaka, okwenza kube lula ukusebenza nayo.
2. Ukwandisa ukugcinwa kwamanzi
Ukugcinwa kwamanzi yenye yezona zinto zibalulekileyo zodaka lomxube omanzi. Ibhekisa kumandla odaka ukugcina amanzi ixesha elide. Udaka ludinga ukugcinwa kwamanzi okwaneleyo ukwandisa amandla kunye nokuthintela ukushwabana kunye nokuqhekeka ngexesha lokumisa.
I-HPMC iphucula ukugcinwa kwamanzi kodaka lomxube omanzi ngokulawula ukufunxwa kunye nokukhululwa kwamanzi kumxube. Yenza ifilimu encinci ejikeleze iinqununu ze-samente, zithintele ukuba zingafaki amanzi amaninzi kwaye ngaloo ndlela zigcine ukuhambelana komxube. Ifilimu iphinda incede ukucotha ukuphuphuma kwamanzi kumxube, ngaloo ndlela yandisa ixesha lokusebenza lodaka.
3. Ukwandisa ukunamathela
I-Adhesion yikhono lodaka lokubopha kwaye unamathele kwi-substrate. Le nto ibalulekileyo ekuqinisekiseni ukuba udaka luhlala luhlala kwaye aluhlukani ukusuka kumphezulu osetyenziswe kuwo. I-HPMC iphucula ukunamathela kodaka lomxube omanzi ngokwandisa ukuhambelana komxube, ngaloo ndlela iphucula amandla ayo okudibanisa.
I-HPMC ifezekisa oku ngokwenza ifilimu ebhityileyo ejikeleze amasuntswana esamente, enceda ukuphucula amandla omatshini wodaka. Ifilimu iphinda isebenze njengomqobo, ukuthintela udaka ukuba luhlukane ne-substrate. Ukuphuculwa kodaka lokunamathela kuphucula ukuqina kunye nokuthembeka kolwakhiwo.
Ukuququmbela
Ukongezwa kwe-HPMC kumxube omanzi wodaka kuneziphumo ezininzi eziluncedo ekusebenzeni, ukuqina kunye nokusebenza komxube. Iphucula ukugcinwa kwamanzi, ukusebenza kunye nokubambelela, okwenza udaka ludibanise ngakumbi, kulula ukuphatha kwaye luthembeke ngakumbi. Ezi zakhiwo zenza i-HPMC ibe yinto efunekayo yokudibanisa imichiza kwimveliso yodaka lomxube omanzi.
Ixesha lokuposa: Sep-15-2023