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Related Concept Videos

Adhesion01:14

Adhesion

40.0K
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...
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Waterproofing and Anti-Bacterial Admixtures in Concrete01:22

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Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
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TAPE: A Biodegradable Hemostatic Glue Inspired by a Ubiquitous Compound in Plants for Surgical Application
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A reversible water-based electrostatic adhesive.

Adriana Sierra-Romero1, Katarina Novakovic1, Mark Geoghegan1

  • 1School of Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK.

Angewandte Chemie (International Ed. in English)
|October 29, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a new reversible electrostatic adhesive with intermediate bond strength. This cost-effective, water-based adhesive offers good adhesion to difficult surfaces and supports sustainable recycling applications.

Keywords:
AdhesionEmulsion PolymersInterfacesPolyelectrolytes

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Adhesion Science

Background:

  • Commercial adhesives are typically structural (covalent bonds, high strength) or pressure-sensitive (physical bonds, convenience).
  • A need exists for adhesives with tunable bond strength, reversibility, and suitability for diverse applications.

Purpose of the Study:

  • To introduce a novel class of reversible electrostatic adhesives.
  • To demonstrate their performance on low-energy surfaces and suitability for recycling and disassembly.

Main Methods:

  • Formulation of water-based adhesives using oppositely charged polyelectrolytes.
  • Utilizing emulsion copolymerization of styrene and butyl acrylate for cost-effective production.
  • Incorporating bio-based materials for enhanced sustainability.

Main Results:

  • The electrostatic adhesive exhibits intermediate bond strength, tunable via pH.
  • Achieved strong adhesion to low-energy surfaces like polypropylene.
  • Demonstrated robust adhesion in humid environments without significant degradation.
  • Facilitated large-scale recycling of packaging and disassembly of electronic/automotive components.

Conclusions:

  • This new electrostatic adhesive offers a unique combination of reversibility, tunable strength, and good adhesion to challenging surfaces.
  • Its cost-effective production and sustainability features make it suitable for industrial applications, including recycling and component disassembly.