Abstract
6-Lauryl poly(oxyethylene ether) is a nonionic surfactant, the phase diagram of which exhibits a large lamellar domain. Negatively charged magnetic particles are incorporated inside the lamellae, the average diameter of the particles being about 7 nm. The volume fraction of particles that can be included is determined. The dilution of such lamellar phases leads to the formation of onions. Upon dilution, doped lamellar phases give rise to onions stuffed with magnetic particles. These onions move in a magnetic field gradient. During the dissolution of the lamellar phase, “myelin figures” are observed. Such nonequilibrium pattern formations have been observed in other cases, namely in the case of dissolution of almost insoluble lamellar phases.
Myelin patterns formed with loaded lamellar phases align in the direction of an applied magnetic field.
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Letellier, D., Cabuil, V. (2000). Dilution of 6-lauryl poly(oxyethylene ether) lamellar phases doped with magnetic nanoparticles. In: Buckin, V. (eds) Trends in Colloid and Interface Science XIV. Progress in Colloid and Polymer Science, vol 115. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-46545-6_2
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DOI: https://doi.org/10.1007/3-540-46545-6_2
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