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High-Toughness CO2-Sourced Ionic Polyurea Adhesives.

Xu Ou1, Ji Pan2, Qinbo Liu1

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.

Advanced Materials (Deerfield Beach, Fla.)
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Summary
This summary is machine-generated.

Researchers developed new CO2-sourced ionic polyurea (PUa) adhesives that overcome limitations in traditional PUa. These advanced adhesives offer ultratough adhesion and enhanced properties for demanding applications.

Keywords:
CO2adhesiveionic polymerpolyurea

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Adhesives Technology

Background:

  • Polyurea (PUa) adhesives exhibit excellent substrate adhesion in challenging conditions.
  • Intermolecular hydrogen bonds in PUa create a balance issue between cohesive and adhesive energy.
  • Existing PUa adhesives face limitations in achieving both high cohesive and interfacial adhesive energy simultaneously.

Purpose of the Study:

  • To develop novel CO2-sourced ionic polyurea (PUa) adhesives with enhanced adhesion.
  • To overcome the trade-off between cohesive and interfacial adhesive energy in PUa.
  • To create high-performance adhesives with improved mechanical and functional properties.

Main Methods:

  • Synthesized CO2-sourced ionic polyurea (PUa) adhesives.
  • Incorporated ionic segments to modify intermolecular interactions.
  • Ionized PUa using bromopropane and anion exchange with lithium bis(trifluoromethylsulfonyl)imide.

Main Results:

  • Achieved maximum adhesive strength of 10.9 MPa.
  • Ionic segments mitigated hydrogen bonding and introduced electrostatic interactions.
  • Demonstrated ultratough adhesion to diverse substrates.

Conclusions:

  • Developed a series of ionic PUa adhesives with superior cohesive and interfacial adhesive energy.
  • Ionic PUa adhesives exhibit excellent low-temperature stability, solvent/water resistance, flame retardancy, and antibacterial activity.
  • Presents a versatile strategy for designing high-strength, functional adhesives for broad applications.