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Related Concept Videos

Anionic Chain-Growth Polymerization: Overview01:20

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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Electrically Accelerated Self-Healable Polyionic Liquid Copolymers.

Qianhui Liu1, Siyang Wang1, Zeyu Zhao1

  • 1Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|May 14, 2022
PubMed
Summary

New self-healing poly(ionic liquids) copolymers act as resistors at low frequencies and capacitors at high frequencies. An electric field accelerates their repair, enabling applications in energy storage and harvesting.

Keywords:
electric current accelerated self-healingpoly(ionic liquid) copolymersself-healing

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electrochemistry

Background:

  • Poly(ionic liquids) (PILs) are polymers with ionic liquid components.
  • Self-healing materials can repair damage autonomously.
  • Understanding the electrical properties of PILs is crucial for advanced applications.

Purpose of the Study:

  • To develop self-healable poly(ionic liquids) copolymers with resistor-capacitor (RC) properties.
  • To investigate the effect of electric fields on the self-healing process.
  • To explore the potential of these materials in energy storage and harvesting devices.

Main Methods:

  • Copolymerization of 1-[(2-methacryloyloxy)ethyl]-3-butylimidazolium bis(trifluoromethyl-sulfonyl)imide (MEBIm-TSFI) with methyl methacrylate (MMA).
  • Characterization of electrical properties (resistor-capacitor behavior) at varying AC frequencies.
  • Assessment of self-healing capabilities under different electric field (EF) conditions.

Main Results:

  • The developed p(MEBIm-TSFI/MMA) copolymers exhibit RC circuit properties, acting as resistors at low AC frequencies and capacitors at high frequencies.
  • Self-healing is significantly accelerated by applying an alternating electric field (1.0-4.0 V), particularly at a 40/60 monomer molar ratio.
  • The interplay of dipolar, electrostatic, and van der Waals interactions governs self-healing, with AC EFs inducing physical crosslinks.

Conclusions:

  • Electrically accelerated self-healing in PILs is achieved through controlled electrostatic interactions.
  • These functional copolymers offer a promising route to advanced self-healable materials for green conducting solid polyelectrolytes.
  • Potential applications include self-healable energy storage and energy-harvesting devices.