Colloidal aggregates fragmentation

Elminyawi IM, Gangopadhyay S, Sorensen CM. Numerical solutions to the Smoluchowski aggregation—fragmentation equation. J Colloid Interface Sci 1991 144 315-323. 

Ouali L, Pefferkorn E. Fragmentation of colloidal aggregates induced by polymer adsorption. J Colloid Interface Sci 1994 168 315-322. 

Ringenbach E, Chauveteau G, Pefferkorn E. Aggregation/fragmentation of colloidal alumina. I. Role of the adsorbed polyelectrolyte. J Colloid Interface Sci 1995 172 203-207. 

The second part is devoted to adsorption of polyelectrolytes at interfaces and to flocculation and stabilization of particles in adsorbing polymer solutions. A recent theory of the electrostatic adsorption barrier, some typical experimental results, and new approaches for studying the kinetics of polyelectrolyte adsorption are presented in the first chapter of this part. In the following chapters, results are collected on the electrical and hydrodynamic properties of colloid-polyelectrolyte surface layers, giving information on the structure of adsorbed layers and their influence on the interactions between colloidal particles examples and mechanisms are analyzed of polyelectrolyte-induced stabilization and fragmentation of colloidal aggregates ... 

Figure 4.9 Influence of e, the interaction potential value between particles, in the aggregation process (a) s =0.5A b , (b) s = 2.5k T, (c) s=3ksT and (d) = 5ArBT. The particle volume fraction is equal to = 0.01. The balance between aggregation, fragmentation and restructuration controls the particle dispersion and aggregate structure. Diez-Orrite, S., Stoll, S. and Schurtenbeiger, R (2005). Study of aggregate formation in colloidal systems off-lattice Monte Carlo simulations. Soft Matter, 1, 364-371. Reproduced by permission of the Royal Society of Chemistry.

Ouali, L. Stoll, S. and Pefferkom, E. (1995). The mechanisms and kinetics of the fragmentation of colloidal aggregates induced by electrostatic and electrosteric repulsion. In Fragmentation Phenomena, Beysens, D., Campi, X. and Pefferkom, E. (eds). World Scientific, Singapore, pp. 64—76. 

Pefferkorn, E. and Stoll, S. (1990). Aggregation/fragmentation processes in unstable latex suspensions. J. Colloid Interface ScL, 138, 261-271. 

Harada S, Tanaka R, Nogami H, Sawada M (2006) Dependence of fragmentation behavior of colloidal aggregates on their fractal structure. J Colloid Interface Sci 301 123... 

It turns out that in solutions of c < 0.1 gL 1 thermosensitive homopolymers, such as PNIPAM, PVCL, and PVME, themselves, form stable colloids in water at elevated temperature in the absence of additives or chemical modification [141-147]. The colloids remain stable upon prolonged heat treatment, without detectable aggregation or precipitation. Also, core-shell particles consisting of PNIPAM and a hydrophobic block are stable not only below but also above the LCST up to 50 °C, when the PNIPAM block is expected to be insoluble [185]. Factors that determine the colloidal stability as defined in Sect. 1.1 do not explain, it seems, their stability. In this review we have compiled a fist of all the reported instances where the formation of stable particles was detected in aqueous solutions of neutral thermosensitive neutral polymers at elevated temperature. We present studies of homopolymers, as well as their copolymers consisting of thermosensitive fragments and ei-... 

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