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Related Concept Videos

Electrical Transport01:29

Electrical Transport

The electrical transport property of a material is defined by its resistance and conductivity. Resistance is the measure of a material's ability to resist the flow of electric current, while conductivity gauges its ability to allow the current to pass through, depending on the geometry of the measurement cell, such as electrode spacing and area. Conductivity is measured in Siemens (S). There are different types of conductance, including specific conductance, equivalent conductance, and molar...
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A Repeatable Self-Adhesive Liquid-Free Double-Network Ionic Conductor with Tunable Multifunctionality.

Ziyu Hua1, Guangxue Chen1, Kai Zhao1

  • 1State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.

ACS Applied Materials & Interfaces
|May 9, 2022
PubMed
Summary
This summary is machine-generated.

New liquid-free ionic conductors offer robust, repeatable adhesion for flexible electronics. These self-adhesive materials maintain strong bonds to various surfaces, overcoming limitations of current technologies.

Keywords:
double networkhydrogen bondingliquid-free ionic conductorself-adhesive properties

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electronics Engineering

Background:

  • Liquid-free ionic conductors (LFICs) are crucial for flexible electronics, avoiding issues like leakage and evaporation.
  • Achieving long-term, repeatable self-adhesion on diverse substrates, including biological tissues, remains a significant challenge for LFICs.

Purpose of the Study:

  • To develop novel repeatable self-adhesive liquid-free double-network ionic conductors (SALFDNICs).
  • To address the trade-off between adhesion and cohesion in LFICs for enhanced device integration.

Main Methods:

  • Fabrication of SALFDNICs using a double-network design with poly(AA-ChCl) supramolecular networks and polydopamine (PDA) networks.
  • Prevention of dopamine overoxidation to maintain dynamic hydrogen bonds and catechol groups for adhesion.
  • Characterization of adhesion strength, detachment-reattachment cycles, self-healing, stretchability, and ionic conductivity.

Main Results:

  • SALFDNICs exhibit strong adhesion (up to 757 N/m) and maintain adhesion over 20 detachment-reattachment cycles with <15% strength reduction.
  • The materials demonstrate excellent self-healing (90% efficiency) and stretchability (1200% strain at break).
  • Achieved ionic conductivity of 2.31 × 10-2 S m-1.

Conclusions:

  • The developed SALFDNICs effectively balance adhesion and cohesion, offering superior performance for flexible electronics.
  • These materials show significant potential for improving device integration and advancing the field of flexible electronics.
  • The double-network design provides a viable strategy for creating advanced liquid-free ionic conductors.