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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...

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Engineered Protein-Cellulose Composite Hydrogels with Superior Mechanical Performance for Bioadhesion.

Juya Jeon1, Zhenqin Wang1, Huiyong Li1

  • 1Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, Saint Louis, Missouri, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|February 26, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a new protein-cellulose hydrogel for strong underwater tissue adhesion. This advanced bioadhesive material shows great promise for tissue repair and regenerative medicine applications.

Keywords:
amyloid beta‐peptidesbio‐adhesivecellulose nanocrystalcomposite hydrogelmussel foot proteinpolydopamineprotein materialssynthetic biologyunderwater adhesive

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Nanotechnology

Background:

  • Achieving strong underwater adhesives with high toughness and biocompatibility for tissue repair is challenging.
  • Existing adhesives often compromise mechanical properties for biocompatibility or vice versa.

Purpose of the Study:

  • To engineer a novel protein-cellulose composite hydrogel with enhanced adhesive strength, toughness, and biocompatibility for tissue repair.
  • To explore the synergistic effects of protein domains and functionalized nanomaterials in hydrogel design.

Main Methods:

  • Engineered hybrid proteins (silk, amyloid, mussel foot protein - SAM) and polydopamine-functionalized cellulose nanocrystals (CNCPDA).
  • Fabricated composite hydrogels with varying CNCPDA concentrations.
  • Characterized mechanical properties (tensile strength, strain, toughness, damping energy) and adhesive strength to biological tissues.
  • Assessed biocompatibility of the composite hydrogels.

Main Results:

  • Hydrogels with 10% CNCPDA showed significantly increased tensile strength (4.9 MPa), strain (770%), toughness (17 MJ/m3), and damping energy (202 kJ/m3).
  • Achieved high adhesive strengths on porcine skin (0.88 MPa) and bovine bone (1.1 MPa), exceeding clinical requirements.
  • Demonstrated tunable mechanical enhancement through pre-stretching and alignment of CNCPDA nanofillers.
  • Maintained excellent biocompatibility.

Conclusions:

  • The protein-cellulose composite hydrogel offers a promising platform for advanced bioadhesives.
  • This material addresses critical unmet needs in tissue repair, particularly for bone regeneration.
  • Synergistic integration of protein design and nanomaterials creates next-generation biomaterials for demanding applications.