Polyelectrolyte Coacervates Deposited as High Gas Barrier Thin Films. Academic Article uri icon


  • Multilayer coatings consisting of oppositely charged polyelectrolytes have proven to be extraordinarily effective oxygen barriers but require many processing steps to fabricate. In an effort to prepare high oxygen barrier thin films more quickly, a polyelectrolyte complex coacervate composed of polyethylenimine and polyacrylic acid is prepared. The coacervate fluid is applied as a thin film using a rod coating process. With humidity and thermal post-treatment, a 2 m thin film reduces the oxygen transmission rate of 0.127 mm poly(ethylene terephthalate) by two orders of magnitude, rivalling conventional oxygen barrier technologies. These films are fabricated in ambient conditions using low-cost, water-based solutions, providing a tremendous opportunity for single-step deposition of polymeric high barrier thin films.

published proceedings

  • Macromol Rapid Commun

altmetric score

  • 7

author list (cited authors)

  • Haile, M., Sarwar, O., Henderson, R., Smith, R., & Grunlan, J. C.

citation count

  • 25

complete list of authors

  • Haile, Merid||Sarwar, Owais||Henderson, Robert||Smith, Ryan||Grunlan, Jaime C

publication date

  • January 2017