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Polyelectrolyte Coacervates Deposited as High Gas Barrier Thin Films
Author(s) -
Haile Merid,
Sarwar Owais,
Henderson Robert,
Smith Ryan,
Grunlan Jaime C.
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600594
Subject(s) - polyelectrolyte , coacervate , materials science , polyethylenimine , thin film , polyacrylic acid , coating , chemical engineering , oxygen , polymer , nanotechnology , composite material , organic chemistry , chemistry , transfection , biochemistry , engineering , gene
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 µm 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.