Enhanced interaction in the polyimide/sepiolite hybrid films via acid activating and polydopamine coating of sepiolite

We aimed at enhancing interaction in the polyimide/sepiolite hybrid films with the loading of sepiolite in the polyimide matrix ranged from 0 to 8 wt% via acid activating and polydopamine doping. First, sepiolite was treated with a 3M HCl solution under reflux conditions. Then the acid‐activated sep...

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Bibliographic Details
Published in:Polymers for advanced technologies 2018-05, Vol.29 (5), p.1404-1413
Main Authors: Kim, Jun‐Seok, Choi, Myeon‐Cheon, Jeong, Keuk‐Min, Kim, Gue‐Hyun, Ha, Chang‐Sik
Format: Article
Language:English
Subjects:
acid activation
Coating
Electron microscopes
Emission analysis
Field emission microscopy
Fourier transforms
polydopamine
polymer/clay nanocomposite
pyromellitic dianhydride–4,4′‐oxydianiline polyimide
Scanning electron microscopy
Sepiolite
Thermogravimetric analysis
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Summary:We aimed at enhancing interaction in the polyimide/sepiolite hybrid films with the loading of sepiolite in the polyimide matrix ranged from 0 to 8 wt% via acid activating and polydopamine doping. First, sepiolite was treated with a 3M HCl solution under reflux conditions. Then the acid‐activated sepiolite was coated by mussel‐inspired polydopamine under alkaline conditions. The coated polydopamine was found to successfully enhance dispersibility of sepiolite in the polyimide matrix. The modification of the sepiolite in the hybrid films was investigated by Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, field emission scanning electron microscopy, thermogravimetric analysis, and transmission electron microscope. The results indicated that polydopamine coating could increase interaction between the polyimide matrix and sepiolite.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.4252