Fluorocarbon—perfluorooctyl bromide

A strong dependence on volume fraction has been observed for fluorocarbon-in-water emulsions. For example, Ni et al, found a ca. three-fold increase in or in going from tp — 0.08 to 0.52 for concentrated emulsions of perfluorooctyl bromide. Trevino et al. also observed the dependence of o) on , and in addition verified the cubic scaling and time independence of the distribution function for similar concentrated perfluorooctyl bromide emulsions. ... 

Meinert et al. [104-106] found that already small quantities [1 or 2% (w/v)] of partially fluorinated alkanes, C, F2 ,+ iC H2h+i, stabilize perfluorodecalin-Pluronic F68 emulsions. Riess et al. [130] deseribed a binary emulsifier system, consisting of a nonfluorinated surfactant in conjunction with a partially fluorinated alkene. Riess et al. [130] named the fluorinated amphiphile a dowel," suggesting that its fluorophilic end adsorbs in the fluorocarbon surface and its lipophilic end penetrates the lipophilic part of the egg-yolk phospholipid. The dowel, C8Fi7CH=CHCsHi7, increased the stability of a perfluorooctyl bromide (PFOB)-egg-yolk lipid emulsion stability considerably. The droplet size (0.25, m) remained constant over 9 months, even at 40 C. In the absence of the dowel, the droplet size more than doubled at 25 C to 0.49 jum. 

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