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On the formation and stability of concentrated water-in-oil emulsions, aphrons
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- Kizling, J (author)
- RISE,YKI – Ytkemiska institutet
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- Kronberg, B (author)
- RISE,YKI – Ytkemiska institutet
- (creator_code:org_t)
- 1990
- 1990
- English.
- In: Colloids and Surfaces. - 0166-6622 .- 1873-4340. ; 50, s. 131-140
- Journal article (peer-reviewed)
Abstract
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- The stability of concentrated w/o emulsions is discussed on the basis of stability measurements of systems containinmg water, dodecane ( or hexadecane) and a nonionic surfactant, viz., polyoxyethylene dodecyl ether. In these emulsions the ratio of the dispersed aqueous phase to the organic phase is so high that the aqueous domains are polyhedral, so-called aphrons, so that the maximum available space is filled. The stability is dependent on: (i) the structure of the surfactant, which determines the preferencial solvency of the surfactant in the organic or the aqueous phase; and (ii) the presence of salts in the aqueous phase, which influences the stability by stopping the Ostwald ripening and/or decreasing the attractive force across the oil lamellae between the aqueous droplets.
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- art (subject category)
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