Hydrogen-Bonding Affords Sustainable Plastics with Ultrahigh Robustness and Water-Assisted Arbitrarily Shape...

Area of Science:

• Materials Science
• Polymer Chemistry
• Sustainable Materials

Background:

• Conventional plastics pose environmental challenges.
• Development of sustainable and high-performance plastic alternatives is crucial.
• Hydrogels offer unique properties but often lack mechanical robustness for plastic applications.

Purpose of the Study:

• To introduce a supramolecular plastic-like hydrogel (SPH) platform for fabricating sustainable plastics.
• To achieve ultrahigh stiffness and strength in plastics derived from hydrogels.
• To enable water-assisted arbitrary shapeability and reversibility in these novel plastics.

Main Methods:

• Fabrication of transparent plastics using cellulose ether/polycarboxylic acid complexes.
• Mechanical testing to evaluate Young's modulus and tensile strength.
• Employing origami, kirigami, and embossing techniques for shape manipulation.
• Utilizing multi-dimensional infrared-spectral analysis to elucidate bonding mechanisms.

Main Results:

• SPHs yield plastics with Young's modulus up to 3.4 GPa and tensile strength up to 124.0 MPa.
• Achieved mechanical properties are superior or comparable to common plastics.
• Demonstrated reversible shape engineering via air drying, leveraging plastic deformation and shape memory effects.
• Identified dense acid-acid and acid-ether hydrogen-bonding networks as key to mechanical robustness.

Conclusions:

• SPHs provide a viable platform for creating sustainable plastics with exceptional mechanical performance.
• The developed plastics exhibit convenient processibility and shape-memory capabilities.
• Understanding hydrogen-bonding networks is critical for designing robust and shapeable hydrogel-based plastics.
• This work presents a novel pathway for manufacturing eco-friendly plastics with enhanced functionality.