Tshuaj pleev ib ce emulsion npaj 2 ntawm 2

Cov roj sib tov muaj dipropyl ether hauv qhov sib piv ntawm 3: 1. Lub hydrophilic emulsifier yog 5: 3 sib tov ntawm coco-glucoside (C8-14 APG) thiab sodium laureth sulfate (SLES).Qhov no ua npuas ncauj anionic surfactant sib tov yog lub hauv paus ntawm ntau lub cev tu formulations.The hydrophobic co-emulsifier yog glyceryl oleate. (GMO).Cov dej cov ntsiab lus tseem tsis hloov ntawm 60%.

Pib nrog cov roj-dawb thiab co-emulsifier system, 40% C8-14 APG / SLES sib tov hauv dej tsim cov kua siv lead ua hexagonal. Cov tshuaj nplaum surfactant yog viscous heev thiab tsis tuaj yeem nqus tau ntawm 25 ℃.

Tsuas yog ib feem me me ntawm C8-14 APG / SLES sib tov yog hloov nrog hydrophobic co-surfactant GMO los tsim ib theem txheej nrog nruab nrab viscosity ntawm 23000 mPa·s ntawm 1s-1. Nyob rau hauv kev xyaum, qhov no txhais tau hais tias lub siab viscosity surfactant paste los ua ib tug pumpable surfactant concentrate.

Txawm hais tias muaj GMO cov ntsiab lus ntxiv, cov theem lamellar tseem nyob twj ywm. Txawm li cas los xij, qhov viscosity nce ntxiv thiab nce mus txog qib rau cov kua gel uas tseem nyob saum cov theem hexagonal. Nyob rau hauv GMO ces kaum, qhov sib tov ntawm GMO thiab dej ua ib tug khoom cubic gel. Thaum cov roj ntxiv, cov kua dej sib txawv hexagonal yog tsim nrog dej raws li theem sab hauv. Lub hexagonal · kua siv lead ua nplua nuj nyob rau hauv surfactants thiab lamellar kua siv lead ua sib txawv nyob rau hauv lawv cov kev xav rau ntxiv cov roj. Whereas lub hexagonal kua siv lead ua tsuas tuaj yeem nqa cov roj tsawg heev, thaj tsam lamellar txuas mus deb ntawm cov roj kaum. Lub peev xwm ntawm lamellar kua siv lead ua kom coj cov roj kom meej meej nrog nce GMO cov ntsiab lus.

Microemulsions tsuas yog tsim nyob rau hauv cov tshuab nrog cov ntsiab lus GMO tsawg. Ib cheeb tsam ntawm low-viscosity o / w microemulsions txuas los ntawm APG / SLES ces kaum raws cov surfactant / roj axis mus txog rau cov roj conte ntawm 14%. Cov microemulsion muaj 24% surfactants, 4% coemulsifier thiab 12% roj, sawv cev rau cov roj uas muaj surfactant concentrate nrog viscosity ntawm 1600 mPa·s ntawm 1 S-1.

Qhov chaw lamellar yog ua raws li qhov thib ob microemulsion. Qhov no microemulsion yog cov roj nplua nuj gel nrog viscosity ntawm 20,000 mPa·s ntawm 1 S^-1(12% surfactants, 8% coemulsifier, 20% roj) thiab tsim nyog ua npuas dej da dej. C8-14 APG / SLES sib tov pab nrog kev tu cov khoom thiab ua npuas ncauj, thaum cov roj sib tov ua raws li kev saib xyuas tawv nqaij ntxiv.Yuav kom tau txais cov nyhuv sib xyaw ntawm microemulsion, cov roj yuav tsum tau tso tawm, uas yog, microemulsion yuav tsum yog. tawg thaum siv.Thaum cov txheej txheem yaug, cov microemulsion nrog cov khoom xyaw tsim nyog yog diluted nrog dej ntau, uas tso cov roj thiab ua raws li cov khoom ntxiv rau ntawm daim tawv nqaij.

Txhawm rau ua kom tiav, alkyl glycosides tuaj yeem ua ke nrog cov co-emulsifiers tsim nyog thiab cov roj sib tov los npaj microemulsions. Nws yog yam ntxwv los ntawm pob tshab, kub stability, siab cia stability thiab siab solubility.

Cov khoom ntawm alkyl polyglycosides nrog cov saw ntev alkyl (C16 txog C22) raws li o / w emulsifiers yog qhov tseem ceeb tshaj. Nyob rau hauv cov pa emulsions nrog fatty cawv los yog glyceryl stearate li coemulsifier thiab sib xws regulator, ntev-chain alkyl polyglycosides qhia zoo stability dua li nruab nrab-chain C12-14 APG piav saum toj no. Technically, qhov ncaj qha glycosidation ntawm C16-18 fatty cawv ua rau muaj kev sib xyaw ntawm C16-18 alkyl polyglycoside thiab cetearyl cawv los ntawm cov cawv cetearyl tsis tuaj yeem raug tshem tawm tag nrho los ntawm cov tswv yim niaj hnub kom tsis txhob muaj xim thiab tsw ntxhiab. Kev siv cov cawv cetearyl residual li co-emulsifier, nws tus kheej-emulsifying o / w bases muaj 20-60% C6 / 18 alkyl polyglycoside yog qhov tsim nyog tshaj plaws hauv kev xyaum rau kev tsim cov tshuaj pleev ib ce thiab tshuaj pleev ib ce raws li tag nrho ntawm cov ntaub ntawv nyoos. Viscosity yog ib qho yooj yim los kho los ntawm tus nqi ntawm alkyl polyglycoside / cetearyl cawv compound thiab kev ruaj ntseg zoo heev, txawm tias muaj cov polar emollients, xws li triglycerides.