Kinetics of aggregation

The remainder of this contribution is organized as follows. In section C2.6.2, some well studied colloidal model systems are introduced. Methods for characterizing colloidal suspensions are presented in section C2.6.3. An essential starting point for understanding the behaviour of colloids is a description of the interactions between particles. Various factors contributing to these are discussed in section C2.6.4. Following on from this, theories of colloid stability and of the kinetics of aggregation are presented in section C2.6.5. Finally, section C2.6.6 is devoted to the phase behaviour of concentrated suspensions. 

For a more complete understanding of colloid stability, we need to address the kinetics of aggregation. The theory discussed here was developed to describe coagulation of charged colloids, but it does apply to other cases as well. First, we consider the case of so-called rapid coagulation, which means that two particles will aggregate as soon as they meet (at high salt concentration, for instance). This was considered by von Smoluchowski 1561 here we follow [39, 57]. 

Weitz D A and Huang J S 1984 Self-similar structures and the kinetics of aggregation of gold colloids Kinetics of Aggregation and Geiationed F Family and D P Landau (Amsterdam North-Holland) pp 19-28... 

More detaiied predictions of the stabiiity and aggregation behaviour of particuiate suspensions require consideration of the kinetics of aggregation and their dependence on fiuid-particie hydrodynamics. 

Family, F. and Landau, D.P. (eds.), 1984. Kinetics of aggregation and gelation. Amsterdam Elsevier. 

Le Bon, C., Nicolai, T., and Durand, D., Kinetics of Aggregation and gelation of globular proteins after heat-induced denaturation, Macromolecules, 32,6120, 1999. 

Tomski SJ, Murphy RM. Kinetics of aggregation of synthetic beta-amyloid peptide. Arch Biochem Biophys 1992 294 630-638. 

Family, F. Landau, D. P. Kinetics of Aggregation and Gelation Elsevier/North-Holland Amsterdam 1984. 

Ziff, R.M. in Kinetics of Aggregation and Gelation. Family F. and Landau D.P., Editors, North-Hoiland, 1984, p. 191. 

Ve have chosen this binary systera to study the kinetics of aggregation of a low molecular weight amphiphile. During this aggregation process, gelation occurs. 

Amal, R. Coury J.R. Raper, J.A. Walsh,W.P. Waite, T.D. (1990a) Structure and kinetics of aggregating colloidal hematite. Colloids Surfaces 46 1-19... 

Kinetics of Aggregation and Dimensions of Supramolecular Structure in Noncrystalline Block Copolymers... 

Ziff RM.(1984) In Family F, Landau DP (eds) Kinetics of aggregation and gelation. Elsevier Sci Publ BV... 

The kinetics of stabilization must match the kinetics of aggregation. While ion diffusion and adsorption is fast (electrostatic stabilization), the diffusion and adsorption of polymers (steric stabilization) is slow and may be a limiting factor which can only be overcome by applying high polymer concentrations. The stability of the electrostatic stabilized suspension in moderately fast processes can for example be monitored and controlled in-line by modem electro-acoustic techniques [13]. 

Family F, Landau DP (1984) Kinetics of Aggregation and Gelation. North-Holland, Amsterdam... 

Payens (1976, 1977) realized that in order to derive an expression for the clotting time of milk, a kinetic description of the enzyme reaction must be combined with the kinetics of aggregation of destabilized colloidal particles. In early versions of his theory, the enzymatic reaction was described by Michaelis—Menten kinetics with the... 

Weitz DA, Huang JS (1984). In Kinetics of Aggregation and Gellation, Family P, Landau DP (eds), Elsevier, New York. 

Family, F. and D.P. Landan (eds.). Kinetic of Aggregation and Gelation, North-HoUand, Amsterdam, 1984. 

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