Newton s law of attraction states that the force of interaction of particles is inversely proportional to the square of the distance between them. However, in a general case of arbitrary bodies the behavior of the force as a function of a distance can be completely different. [Pg.2]

The existence of short-range attractive interactions between particles leads to a much richer phase behavior, as illustrated in Fig. 3. This situation can be achieved by adding a nonadsorbing polymer to the suspensions, which induces an effective depletion attraction between the particles [105]. Such polymer-colloid mixtures can be viewed as model systems of complex fluids and are involved in many practical [Pg.129]

An alternative treatment of attractive interactions between particles is that given by Lifshita and co-workers 11961) it is beyond the scope of this article but is discussed by Ninham and Parsegian (1970, 1971) and Richmond (1975). [Pg.13]

Utilizing the high attractive interactions of carboxylated PBMA particles with positively charged ammonium silanes, assembly patterns with dimensions down to several particle diameters were achieved, promising the possibility of generating latex surface patterns in the dimension of individual particles with this method. [Pg.782]

New difficulties arise when we try to take into account the dynamical interaction of particles caused by pair potentials U(r) mutual attraction (repulsion) leads to the preferential drift of particles towards (outwards) sinks. This kind of motion is described by the generalization of the Smoluchowski equation shown in Fig. 1.10. In terms of our illustrative model of the chemical reaction A + B —> B the drift in the potential could be associated with a search of a toper by his smell (Fig. 1.12). An analogy between Schrodinger and Smoluchowski equations is more than appropriate indeed, it was used as a basis for a new branch of the chemical kinetics operating with the mathematical formalism of quantum field theory (see Chapter 2). [Pg.17]

Since aggregation is also an important phenomenon in other areas (pigments, paints, powder handUng, etc.) numerous studies deal with the interaction of particles [20]. When two bodies enter into contact they are attracted to each other. The strength of adhesion between the particles is determined by their size and surface energy [21,22], i.e. [Pg.118]

For the flocculated suspensions with (, = 0 nV , the size segregation effect will be disturbed by the dominating attractive interaction between particles. This disturbance can be observed even in the less-concentrated suspensions. Fig. 3 shows the packing structures after a process time of t = 42.32 and their corresponding distributions of smallest particles [Pg.33]

The lines in Fig. 7-6 show that this expression fits the temperature-dependence of the viscosity for

Two specific interaction schemes are considered a) the particles interact by predominantly hard-sphere repulsive forces b) a short range attractive interaction between particles exists, such that a weak tendency for self association results. Likely candidates for the attractive potential between PSM primary aggregates are hydrophobic and/or hydrogen-bonding interactions of the carbohydrate side chains S. [Pg.220]

In the absence of external hydrodynamic forces, the stability of a colloid depends on partides interaction caused by surface forces electrostatic repulsion and molecular attraction [52]. In order for the partides to interact with each other under influence of these forces, they need to be sufficiently close to one another. The partides approach in a liquid occurs under the action of Brownian motion, due to the influence of external forces, for example, gravity, or due to hydrodynamic forces. Studies of stability of the colloid systems should be carried out with due consideration of all the factors listed. Generally, this problem is very difficult, and therefore we consider first the interaction of particles under the action only of electrostatic and molecular forces. The theory of stability of a colloid system subject to such interactions is called DLFO theory as an acronym of its founders - Derjaguin, Landau, Ferwey, and Overbeck [53]. [Pg.259]

© 2019 chempedia.info