THE MECHANISM OF ADHESION BETWEEN SOLID AEROSOL PARTICLES

Abstract

The results of a review of the literature and of a few supplementary experiments on the adhesion between solid bodies and between solid particles are reported. Water is the cause of adhesion under ordinary conditions, namely, by three mechanisms: (a) Capillary forces (surface tension) in the case of comparatively thick films of water on insoluble solids. (b) Intermolecular forces (hydrogen bonds) between water molecules and OH groups in the solids in the case of comparatively thin (monomolecular) films on insoluble solids. (c) Coalescence by dissolution and precipitation in the cases of thin or thick films of water on soluble solids. The role of electrostatic charge is not well clarified by the experimental evidence. It appears that electrostatic attraction after contact contributes negligibly, and that the main effect of electrostatic charge is that of a discharge current upon the mechanism c.

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Document Details

Document Type
Technical Report
Publication Date
Dec 29, 1961
Accession Number
AD0833168

Entities

People

  • T. G. Berg

Organizations

  • Aerojet Rocketdyne Holdings

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Charged Particles
  • Chemical Properties
  • Dielectrics
  • Electrostatic Charge
  • Fatty Acids
  • Films
  • Friction
  • Humidity
  • Hydrogen Bonds
  • Materials
  • Measurement
  • Monomolecular Films
  • Particle Size
  • Solid Bodies
  • Surface Tension
  • Thick Films
  • Thin Films

Readers

  • Aerosol Science/Aerosol Physics
  • Agricultural Chemistry/Soil Science
  • Plasma Physics.