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Related Concept Videos

Cell Adhesion in Plants01:14

Cell Adhesion in Plants

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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,...
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Adhesion01:14

Adhesion

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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.
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Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy
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Scale-Spanning Strong Adhesion Using Cellulose-Based Microgels.

Bei He1,2, Lizhen Chen1, Philip Biehl1

  • 1Sustainable Materials and Chemistry, Dept. Wood Technology and Wood-based Composites, University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|May 10, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed tough microgel membranes from biobased cellulose. These membranes offer strong, repeatable adhesion to various surfaces, outperforming existing bio- and petroleum-based adhesives for advanced material applications.

Keywords:
adhesivecellulosemembranesmicrogeltough

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Biobased adhesive gels offer sustainable alternatives but struggle with combining toughness and strong adhesion.
  • Polysaccharide-based gels often exhibit high toughness but weak interfacial adhesion due to hydration effects.

Purpose of the Study:

  • To fabricate highly tough microgel membranes with strong, persistent, and repeatable adhesion.
  • To overcome the limitations of existing biobased adhesive gels in terms of mechanical properties and adhesion.

Main Methods:

  • Fabrication of microgel membranes using loosely chemically cross-linked dihydroxypropyl cellulose (cDHPC) microgels.
  • Characterization of microgel membrane properties, including tensile strength, toughness, and adhesive strength to various substrates.
  • Evaluation of adhesion performance over multiple adhesion-detachment cycles.

Main Results:

  • Developed cDHPC microgel membranes (average size 1.25 µm) with rough surfaces.
  • Achieved high tensile strength (0.23 MPa) and toughness (73.8 KJ m⁻³).
  • Demonstrated strong, instant, and persistent adhesion exceeding 320 KPa, with debonding work over 160 J m⁻², maintaining >200 KPa after five cycles.

Conclusions:

  • The novel microgel membranes exhibit superior adhesive properties compared to most biobased and petroleum-based gels.
  • Synergistic molecular and microscaled topological interactions contribute to the enhanced adhesion and mechanical properties.
  • These findings highlight the potential of biobased microgel membranes in flexible smart materials and biomedicine.