Abstract
Aggregation of dry cohesive powders and dissipation of energy during loading of the aggregates are under consideration. Under the influence of interparticle adhesion, fine particles of the powders cluster together to form simple agglomerates. The simple agglomerates adhere together to form larger, complex agglomerates, which in turn, may adhere together and form a hierarchical structure. It is shown that contrary to diffusion-limited colloid aggregation, the simple agglomerates consisting of alumna or titanium dioxide particles are not mass fractals. The core structure of the simple agglomerates is described as a non-ordered homogeneous structure with a constant volume fraction, while the outer part (shell) can be considered as a rough surface that may have quite extended protuberances. It is shown that the total energy dissipated during relative motion between simple agglomerates depends on the amount of the primary cycles – “jump into contact – pull off” between cohesive particles. Finally, the specific properties of cohesive powder dampers are discussed.
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References
Castellanos, A.: The relationship between attractive interparticle forces and bulk behaviour in dry and uncharged fine powders. Adv. Phys. 54, 263–376 (2005).
Torquato, S., Truskett, T., Debenedetti, P.: Is random close packing of spheres well defined? Phys. Rev. Lett. 84, 2064–2067 (2000).
Bideau D., Troadec J., Lemaitre J., Oger L.: Dense packing of hard grains: Effects of grain size distribution. In: Physics of Finely Divided Matter (Boccara, N., and Daoud, M., eds.) Berlin: Springer-Verlag 1985, pp. 76–81.
Zhou, T., Li, H.: Estimation of agglomerate size for cohesive particles during fluidization. Powder Techno. 101, 57–62 (1999).
Tabor, D. Surface forces and surface interactions. J. Colloid. Interface Sci., 58, 2–13 (1977).
Maugis D.: Adhesion of spheres-the JKR-DMT transition using a Dugdale model. J. Colloid Interface Sci. 150, 243–269 (1992).
Muller, V., Yushchenko, V., Derjaguin, B.: Influence of molecular forces on the deformation of an elastic sphere and its sticking to a rigid plane. J. Colloid Interface Sci. 77, 91–101 (1980).
Maugis, D.: Contact, adhesion and rupture of elastic solids. New York: Springer 2000.
Rumpf, H.: The strength of granules and agglomerates. In: Agglomeration (Knepper, W., ed.), pp. 379–418, International Symposium on Agglomeration, Philadelphia, 1961. New York: Interscience Publisher, 1962.
Kendall, K.: Agglomerate strength. Powder Metall. 31, 28–31 (1988).
Oulanti O., Widmaier J., Pefferkorn E., Champ S., Auweter H.: Destabilization of polystyrene latex particles induced by adsorption of polyvinylamine: Mass, size and structure characteristics of the growing aggregates. J. Colloid Interface Sci.. 294, 95–103 (2006).
Jiang Q., Logan B.: Fractal dimensions of aggregates determined from steady-state size distributions. Environ. Sci. Technol. 25, 2031–2038 (1991).
Lin M., Lindsay H., Weitz D., Ball R., Klein R., Meakin P.: Universality in colloid aggregation. Nature 339, 360–362 (1989).
Valverde J. M. Castellanos A.: Random loose packing of cohesive granular materials.Europhys. Lett. 75, 985–991 (2006).
Muellera R., Kammlera H., Pratsinisa S., Vitalb A., Beaucagec G., Burtscher P.: Non-agglomerated dry silica nanoparticles. Powder Technol. 140, 40–48 (2004).
Xiong C., Friedlander S.: Morphological properties of atmospheric aerosol aggregates. Proc Natl Acad Sci USA 98, 11851–11856 (2001).
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Keer, L.M., Borodich, F.M., Shah, B.M. (2009). Scaling and Hierarhical Structure of Cohesive Agglomerates of Nanoparticles. In: Borodich, F. (eds) IUTAM Symposium on Scaling in Solid Mechanics. Iutam Bookseries, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9033-2_27
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DOI: https://doi.org/10.1007/978-1-4020-9033-2_27
Publisher Name: Springer, Dordrecht
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