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This publication goals to provide an summary of the latest advances in emulsion technology. the elemental ideas of emulsion technology, overlaying points of emulsions from their practise to their destruction, are awarded in shut relation to either the elemental physics and the purposes of those fabrics. The booklet is meant to aid engineers in formulating new fabrics via giving them an knowing of those uncomplicated ideas, in addition to serving as a reference e-book.
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This is due to the possible deformation of liquid droplets, which allows the interactions to be coupled to the shape of the particles. By assuming very short-range forces, we can stay in the framework of the Young–Dupr´e model and simply derive the net interaction when two droplets deform and approach each other to reach the equilibrium state depicted in Fig. 16. The process can be conceptually divided into two steps. During the ﬁrst step, the droplets are deformed, far from each other. A ﬂat ﬁlm of radius r is formed.
17, a contact angle can be experimentally measured by looking at two adhesive droplets. However, a direct determination from side views is rather diﬃcult unless the contact angle is large enough, as in Fig. 17. A more convenient way to achieve measurements of contact angles consists in measuring the radii of two adhesive droplets, R1 and R2 , and the radius of curvature of the adhesive ﬁlm between the droplets, r (Fig. 18) [55, 56, 57]. We have: r r 2θ = sin−1 + sin−1 , R1 R2 in the case of two droplets with diﬀerent radii.
Phys. Lett. 240, 385 (1995) 14 25. V. Bergeron, C. J. Radke: Equilibrium measurements of oscillatory disjoining pressures in aqueous foam ﬁlms, Langmuir 8, 3020 (1992) 15 26. P. G. De Gennes, Scaling Concepts in Polymer Physics (Cornell University Press, London 1979) 15, 20 27. G. Fleer, M. Cohen Stuart, J. Scheutjens, T. Cosgrove, B. Vincent: Polymers at Interfaces (Chapman and Hall, London 1993) 16 28. S. S. Patel, M. Tirrell: Measurement of forces between surfaces in polymer ﬂuids, Annu. Rev.