Particle agglomeration refers to the formation of assemblages in a suspension and represents a mechanism leading to the functional destabilization of colloidal systems. During this process, particles dispersed in the liquid phase stick to each other, and spontaneously form

An aggregate of fine particles effectively exposes less particle surface to the suspending fluid than do the original particles and hence there is less fluid drag. This results in enhanced sedimentation rates and greater permeability in, say, cake filtration of aggregated suspensions.

Aggregates are particles of random shape. They can be either in nature as sand, gravel, stones, or rock that can be crushed into particles or obtained from by-products or waste materials from an industrial process. Aggregate sizes vary from several cm to several mm. Aggregates generally occupy 60%–80% of the concrete volume.

2020年5月1日 · Aggregation of nanoparticles influences their technological application. Gas phase and liquid phase synthesis have different effects on aggregation. Many strategies for nanoparticle dispersion are available. Examples of nanoparticle use in the real world demonstrate the relevance of aggregation.

2021年8月30日 · A hydrophilic colloid particle interacts strongly with water, resulting in a shell of tightly bound water molecules that prevents the particles from aggregating when they collide. Heating such a colloid can cause aggregation because the particles collide with greater energy and disrupt the protective shell of solvent.

2014年1月1日 · Aggregation of colloidal particles occurs when physical processes bring particle surfaces in contact with each other and short-range thermodynamic interactions allow for particle–particle attachment to occur. There are two types of aggregation relevant to manufactured NPs in the environment: homoaggregation and heteroaggregation.

Aggregation of particulate material is a primary process because it alters the transport properties of particulate material and provides a mechanism for transferring material from the dissolved into the particulate pools.

2001年1月2日 · To aggregate, a collision must occur between the particles and when that collision occurs the particles must adhere to one another. We first consider why particles adhere and then consider the question of what processes lead to particle collisions and …

Aggregates are an assembly of primary particles that have grown together and are aligned side by side; the total specific surface area is less than the sum of the surface areas of the primary particles. For example, five primary particles form an agglomerate by adhesion.

2013年12月20日 · Two methods for increasing the size of solid particles are studied in this chapter, coagulation by reducing inter-particle electrostatic repulsion and flocculation by bridging particles with polymeric agents. Most mineral particles suspended in water in the neutral pH range have negative surface charges.