What is Adhesion?
[[File:Spider web Luc Viatour.jpg|thumb|[[Dew]] drops adhering to a [[spider web]]]] '''Adhesion''' is the process in which dissimilar [[particle]]s stick together. In the case of similar particles, this effect is called [[Cohesion (chemistry)|cohesion]]. Adhesion results from the physical properties of the [[Interface(chemistry)|interface]] between two [[Phase (matter)|phases]]. The forces that result in adhesion are not fully known, there are different explanations. Five different types of adhesion have been proposed: *Mechanical adhesion: Adhesive materials fill the voids or pores, and interlock *Chemical adhesion: Where they join, two materials form a [[Chemical compound]]. *Dispersive adhesion: Two materials are held together by [[Van der Waals force]]s *Electrostatic adhesion: Two materials are held together by [[Electrostatics|electrostatic charge]] *Diffusive adhesion: Two materials are held together with [[Atomic diffusion]], it is derived from a sanskrit word adhere meaning to hold on {{physics-stub}} [[Category:Adhesives]]