Coagulation contacts surfactant adsorption

The presence of an essentially similar liquid medium and of surfactant adsorption influences the magnitude and nature of the surface forces and may result in weakened cohesion in the contacts by two to three orders of magnitude. In a lyophilized, highly concentrated system in which the particles are brought into mechanical contact, this is revealed through lower resistance to deformation, x, and results in a plasticizing of the system (see Chapters 2 and 3). When the disperse phase concentration is low, lyophilization leads to the preservation of the colloidal stability of a free-disperse system, that is, the resistance of the system to coagulation (see Chapter 4). 

Physical-Chemical Mechanics of Disperse Systems and Materials contains seven chapters. Section I, with four chapters, presents the basics, starting from surface forces and the contact of particles with liquids. Chapter 2 is dedicated to adsorption phenomena, accumulation of surface-active molecules at various interfaces, and the importance of surfactant s adsorption on the contact between particles. The bulk properties of particle dispersions in liquids are discussed in Chapter 3 in terms of coagulation processes and the rheological behavior. Chapter 4 describes in a comprehensive way the stability of disperse systems and emphasizes the Rehbinder effect as an important mechanism in stable colloidal systems. Section II consists of three chapters. Chapter 5 provides an introduction to the methodology of mechanical testing Chapter 6 describes in detail the structures... 

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