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Fabrication and characterization of polyimide composite films via surface modification and ion exchange technique

Title
Fabrication and characterization of polyimide composite films via surface modification and ion exchange technique
Author
Hui, Kwan-San
Keywords
Polymers; Surface treatment; Films; Surface modification; Polyimide; KOH treatment; Ion exchange; PI/Al2O3 composite film
Issue Date
2016-02
Publisher
EMERALD GROUP PUBLISHING LIMITED
Citation
PIGMENT & RESIN TECHNOLOGY, v. 45, NO 1, Page. 30-37
Abstract
Purpose - The aim of this study was to fabricate polyimide (PI)/Al2O3 composite films via surface modification and ion exchange techniques, and examine their properties. Design/methodology/approach - The method involves hydrolyzing the PI film double surface layers in an aqueous potassium hydroxide (KOH) solution and incorporating aluminium ions (Al3+) into the hydrolyzed layers of the PI film via subsequent ion exchange, followed by a treatment of the Al3+-loaded PI films with an aqueous ammonia solution, which leads to the formation of Al(OH)(3) in the surface-modified layers. After a final thermal annealing treatment in ambient air, the Al(OH)(3) decomposes to Al2O3, and forms composite layers on both surfaces of the re-imidized PI film. Findings - The PI/Al2O3 composite film obtained with a 6 hours of KOH treatment exhibited excellent thermal stability, good mechanical properties and better electric breakdown strength and corona-resistance properties than the pristine PI film. Practical implications - The method for obtaining the composite films in this paper is worth consideration, but additional research will be needed. Furthermore, this method is of general importance for the fabrication of composite PI films with tailored properties. Originality/value - This study showed that surface modification and ion-exchange techniques are powerful methodologies for the fabrication of PI/Al2O3 composite films.
URI
http://www.emeraldinsight.com/doi/abs/10.1108/PRT-01-2015-0009http://hdl.handle.net/20.500.11754/33948
ISSN
0369-9420; 1758-6941
DOI
10.1108/PRT-01-2015-0009
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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