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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Low-density polyethylene (LDPE) is a widely used synthetic polymer.
  • Cellulose nanocrystals (CNCs) are abundant, bio-based nanofillers.
  • Achieving compatibility between hydrophobic polymers and hydrophilic fillers is challenging.

Purpose of the Study:

  • To fabricate homogeneous nanocomposites of LDPE and CNCs.
  • To overcome the inherent incompatibility between LDPE and CNCs.
  • To enhance the mechanical properties of LDPE using CNCs.

Main Methods:

  • A templating approach using an organogel was employed.
  • Aqueous CNC dispersions were converted to organogels using acetone.
  • The organogels were impregnated with hot LDPE solution in toluene.
  • Resulting materials were compression-molded into thin films.

Main Results:

  • Homogeneous nanocomposites were successfully fabricated.
  • A three- to four-fold increase in strength and stiffness was observed at 7.6% v/v CNC content.
  • The CNC network integrity was largely maintained.
  • The nanocomposites demonstrated reprocessability using conventional melt-processing techniques.

Conclusions:

  • A novel templating method enables the kinetic trapping of homogeneous LDPE/CNC nanocomposites.
  • The fabricated nanocomposites exhibit significantly enhanced mechanical properties.
  • The developed materials are suitable for reprocessing, broadening their application potential.