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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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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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RETRACTED: Alshabanah et al. Elastic Nanofibrous Membranes for Medical and Personal Protection Applications: Manufacturing, Anti-COVID-19, and Anti-Colistin Resistant Bacteria Evaluation. <i>Polymers</i> 2021, <i>13</i>, 3987.

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Correction: Kang et al. Energy-Saving Electrospinning with a Concentric Teflon-Core Rod Spinneret to Create Medicated Nanofibers. <i>Polymers</i> 2020, <i>12</i>, 2421.

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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A Self-Healable and Recyclable Zwitterionic Polyurethane Based on Dynamic Ionic Interactions.

Haiyan Mao1, Qun Zhang1, Ling Lin1

  • 1School of Textile & Clothing, Yancheng Institute of Technology, Yancheng 224051, China.

Polymers
|March 11, 2023
PubMed
Summary
This summary is machine-generated.

A novel zwitterionic polyurethane (ZPU) demonstrates remarkable self-healing and recyclability due to dynamic ionic bonds. This eco-friendly material offers excellent mechanical properties and repair capabilities for advanced applications.

Keywords:
elasticityreprocessingself-healingzwitterionic polyurethane

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Polyurethanes are versatile polymers with growing interest in sustainable applications.
  • Developing eco-friendly polyurethanes with enhanced functionalities like self-healing and recyclability is crucial.

Purpose of the Study:

  • To synthesize and characterize a self-healable and recyclable zwitterionic polyurethane (ZPU).
  • To investigate the structure-property relationships governing the ZPU's performance.

Main Methods:

  • Zwitterionic polyurethane synthesized via ionic bonds between ammonium and sulfonic acid groups.
  • Characterization using FTIR and XPS.
  • Evaluation of thermal, mechanical, self-healing, and recycling properties.

Main Results:

  • ZPU exhibits comparable thermal stability to cationic polyurethane (CPU).
  • Dynamic ionic cross-linking provides high tensile strength (7.38 MPa), elongation at break (980%), and elastic recovery.
  • Achieved over 93% healing efficiency at 50 °C within 1.5 hours.
  • Demonstrated over 88% recovery efficiency through reprocessing via solution casting and hot-pressing.

Conclusions:

  • The dynamic ionic network in ZPU enables efficient self-healing and reprocessing.
  • ZPU shows significant potential for eco-friendly applications, including protective coatings and wearable electronics.