Converting these emulsions to composites was accomplished by substituting styrene for heptane to create polymerized high internal phase emulsions (polyHIPEs). Polymerizing the continuous phase of the emulsion created polymer composite foams with hBN-lined cells. SEM images of these materials are shown in Fig. . The cell morphology of the composite foam is shown in Fig. . This interstitial polymer is evident in Fig. , with an arrow pointing to a region where two water droplets touched but did not coalesce. Where the spheres touched, there was no polymer, so that region consisted only of a thin film of hBN that did not survive the cross-sectioning process. both at the surface of the cells and in the polymer matrix. We found that not all the hBN exfoliated and resided at the interface; some could be found embedded in the polymer matrix near the oil: