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Related Concept Videos

Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Lithium Bonds Enable Small Biomass Molecule-Based Ionoelastomers with Multiple Functions for Soft Intelligent

Chao Dang1, Fei Zhang2, Yuehu Li1

  • 1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 15, 2022
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Summary

This study introduces a novel method to create advanced ionoelastomers from lipoic acid (LA) using Li-bonds. These new materials offer superior conductivity, self-healing, and recyclability for soft electronics.

Keywords:
biomassionoelastomerslithium bondsmultifunctionsoft electronics

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Soft Electronics

Background:

  • Lipoic acid (LA) shows potential in soft conductors but suffers from depolymerization issues.
  • Existing soft conductors often have limitations like tedious synthesis, non-renewability, and limited functionality.

Purpose of the Study:

  • To develop high-performance ionoelastomers (IEs) from lipoic acid (LA).
  • To overcome the depolymerization limitations of LA in soft conductor applications.
  • To create multifunctional, recyclable, and degradable soft electronic materials.

Main Methods:

  • Utilizing Li-bonds as depolymerization quenchers and dynamic mediators.
  • Transforming lipoic acid (LA) into ionoelastomers (IEs) through melt processing.
  • Characterizing the properties and performance of the synthesized IEs.

Main Results:

  • Developed ionoelastomers (IEs) with a unique dry network structure.
  • Achieved a combination of transparency, stretchability, conductivity, self-healing, non-corrosiveness, re-mouldability, strain-sensitivity, recyclability, and degradability.
  • Demonstrated the use of IEs as soft sensors and recycled IEs as conductive fillers for triboelectric nanogenerators.

Conclusions:

  • Successfully addressed the limitations of lipoic acid (LA) depolymerization in soft conductors.
  • Created versatile, high-performance ionoelastomers (IEs) with a wide range of desirable properties.
  • Paved a new path for intelligent soft electronics research and development.