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Related Experiment Video

Updated: May 22, 2026

Synthesis of Strong Adhesive Hydrogel, Gelatin O-Nitrosobenzaldehyde
07:04

Synthesis of Strong Adhesive Hydrogel, Gelatin O-Nitrosobenzaldehyde

Published on: November 11, 2022

Architected Inverse Nacre Hydrogels With High Strength and Crack-Insensitive Toughness.

Haidi Wu1, Qin Su1, Cheng Guan1

  • 1School of Chemistry and Materials, Yangzhou University, Yangzhou, Jiangsu, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 21, 2026
PubMed
Summary

Researchers developed a novel "inverse nacre" design for synthetic hydrogels, enhancing strength and toughness. This breakthrough uses aligned MXene nanosheets as "bricks" and poly(vinyl alcohol) (PVA) hydrogel as "mortar" for resilient soft materials.

Keywords:
MXenePVA hydrogelsmechanical propertiesorientation

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Last Updated: May 22, 2026

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Published on: August 13, 2021

Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Synthetic hydrogels face limitations in load-bearing applications due to low fracture toughness and strength-toughness trade-offs.
  • Existing hydrogel designs struggle to balance mechanical strength with flexibility and durability.

Purpose of the Study:

  • To overcome the limitations of synthetic hydrogels in load-bearing applications.
  • To introduce a novel "inverse nacre" design principle for enhanced hydrogel performance.
  • To develop a generalizable strategy for creating structurally resilient soft materials.

Main Methods:

  • Hierarchical alignment of poly(vinyl alcohol) (PVA) chains and MXene nanosheets.
  • Utilizing a scalable thermo-calendering process for material fabrication.
  • Implementing an "inverse nacre" architecture with MXene as "bricks" and PVA as "mortar".

Main Results:

  • Achieved exceptional tensile strength (63.48 MPa), work of fracture (54.79 MJ/m³), and fracture toughness (115.98 kJ/m²).
  • Demonstrated crack-insensitive fracture behavior with extensive crack deflection and branching.
  • Maintained high hydrogel water content while significantly enhancing mechanical properties.

Conclusions:

  • The "inverse nacre" design principle effectively resolves the strength-toughness paradox in synthetic hydrogels.
  • The developed composite material exhibits superior mechanical resilience and self-preservation capabilities.
  • This biomimetic strategy offers a versatile route for designing advanced soft materials for diverse applications.