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Related Concept Videos

Adhesion01:14

Adhesion

39.9K
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...
39.9K
Cell Adhesion in Plants01:14

Cell Adhesion in Plants

2.7K
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
2.7K

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Related Experiment Video

Updated: Jul 1, 2025

Bacterial Cellulose Spheres that Encapsulate Solid Materials
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Reevaluation of the adhesion between cellulose materials using macro spherical beads and flat model surfaces.

Hailong Li1, Nadia Asta2, Zhen Wang2

  • 1State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 116024 Dalian, China; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden.

Carbohydrate Polymers
|March 2, 2024
PubMed
Summary

Dry cellulose interactions were investigated using custom equipment. Findings reveal distinct adhesion mechanisms based on substrate backing, crucial for designing advanced cellulose materials.

Keywords:
Cellulose beadCellulose thin filmContact adhesion testingInteraction

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Area of Science:

  • Materials Science
  • Surface Science
  • Biomaterials Engineering

Background:

  • Understanding dry cellulose interactions is key for developing novel cellulose-based materials.
  • Previous studies relied on macroscopic testing, which may not capture nanoscale adhesion phenomena.
  • Cellulose's rich fibrillar structure suggests complex surface interactions.

Purpose of the Study:

  • To investigate the contact adhesion mechanisms of dry cellulose using model systems.
  • To elucidate the role of substrate backing (Polydimethylsiloxane (PDMS) and glass) on cellulose-cellulose interactions.
  • To correlate adhesion forces with surface morphology and retraction kinetics at the nanoscale.

Main Methods:

  • Utilized custom-built contact adhesion testing equipment.
  • Employed model systems including cellulose beads and cellulose films.
  • Investigated cellulose films spin-coated on Polydimethylsiloxane (PDMS) and glass substrates.

Main Results:

  • Three distinct interaction processes were identified based on substrate configuration.
  • Molecular interlocking observed with a soft PDMS backing due to cellulose-cellulose contact.
  • Significant force increase during retraction for cellulose on glass, dependent on retraction rate, attributed to nanoscale fibrillar interdigitation.

Conclusions:

  • The study reveals complex nanoscale adhesion mechanisms in dry cellulose interactions.
  • Macroscopic testing methods are insufficient for precise molecular tailoring of cellulose-based materials.
  • Findings provide insights for designing advanced cellulose materials with controlled adhesive properties.