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Related Concept Videos

Adhesion01:14

Adhesion

Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...

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Related Experiment Video

Updated: May 23, 2026

Studying Cavitation Enhanced Therapy
07:36

Studying Cavitation Enhanced Therapy

Published on: April 9, 2021

How acoustic cavitation can improve adhesion.

J Holtmannspötter1, M Wetzel, J V Czarnecki

  • 1Bundeswehr Research Institute for Materials, Fuels and Lubricants (WIWeB), Institutsweg 1, 85435 Erding, Germany. JensHoltmannspoetter@BWB.Org

Ultrasonics
|April 3, 2012
PubMed
Summary
This summary is machine-generated.

Power ultrasound enhances adhesive bonding by improving interface formation and contamination tolerance. This method uses acoustic cavitation for robust, high-quality adhesive bonds, even with contaminated surfaces.

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Induction of Adhesion-dependent Signals Using Low-intensity Ultrasound
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Induction of Adhesion-dependent Signals Using Low-intensity Ultrasound

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Related Experiment Videos

Last Updated: May 23, 2026

Studying Cavitation Enhanced Therapy
07:36

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Published on: April 9, 2021

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
14:22

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

Induction of Adhesion-dependent Signals Using Low-intensity Ultrasound
08:51

Induction of Adhesion-dependent Signals Using Low-intensity Ultrasound

Published on: May 8, 2012

Area of Science:

  • Materials Science
  • Acoustics Engineering
  • Surface Science

Background:

  • Ultrasound is typically used at low power for non-destructive testing (NDT) of adhesive bonded structures.
  • Conventional bonding processes are sensitive to surface contamination, affecting bond quality.

Purpose of the Study:

  • To investigate the application of power ultrasound to improve adhesive bonding processes.
  • To enhance interface formation and ensure bond quality using acoustic cavitation.

Main Methods:

  • Utilizing power ultrasound with acoustic cavitation in liquid adhesives.
  • Employing high-speed videography, rheological and thermal measurements.
  • Conducting destructive testing on adhesive bonds with contaminated surfaces.

Main Results:

  • Power ultrasound significantly improves interface formation prior to bonding.
  • Acoustic cavitation enhances contamination tolerance and robustness of adhesive bonds.
  • Demonstrated improvement in the quality and reliability of adhesive bonds.

Conclusions:

  • Power ultrasound is a viable method for improving adhesion.
  • This technique offers enhanced contamination tolerance and robustness for adhesive bonding processes.
  • The study highlights the potential of power ultrasound in advanced materials joining.