2. Principle
The principle (see figure 1 ) is based on the hot production of an emulsion formed by oil droplets in an aqueous phase, followed by the synthesis of a rigid, brittle shell coating the droplets. This emulsion has two characteristics:
water-oil interface stabilizers are solid particles (Pickering emulsions);
oil characterized by its melting temperature T f is solid at storage temperature and becomes liquid at use temperature. The melting of the oil is accompanied by a volumetric expansion that is sufficient to break the solid shell. Indeed, because of its rigid nature, the silica shell (silicon dioxide noted SiO 2 ) is too little deformable to...
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Principle
Preparing emulsions
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