Vermicious thermo-responsive Pickering emulsifiers† †Electronic supplementary information (ESI) available: The theoretical background to the SAXS analysis, gel permeation chromatography analysis of the worms, optical microscopy images and laser diffraction analysis of water droplets. See DOI: 10.1039/c5sc00598a
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چکیده
Theoretical background for SAXS analysis In view of our TEM observations (Figure 2) and previously reported SAXS data obtained for a PLMA16PBzMA37 solution in n-dodecane1, it was assumed that the SAXS patterns corresponded to (i) a pure worm phase (Figure 4a) for the dilute PLMA16-PBzMA37 dispersion and (ii) spherical aqueous droplets stabilised by a layer of adsorbed worms for the concentrated water-in-n-dodecane emulsion (Figure 4b). Thus data analysis utilized two models: a worm-like micelle model2, 3 (model 1) and a core-shell model comprising a particulate shell formed by the adsorbed worms (model 2). In general, the X-ray intensity scattered by a system composed of n different (non-interacting) populations of polydisperse objects [usually described by the differential scattering cross-section per unit sample volume, dΣ(q)/dΩ] can be expressed as
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