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- Title
Freezing/thawing effects on the exfoliation of montmorillonite in gelatin-based bionanocomposite.
- Authors
Mu, Changdao; Li, Xinying; Zhao, Yige; Zhang, Hanguang; Wang, Liangjie; Li, Defu
- Abstract
Freezing/thawing is used as a new method to elaborate exfoliated gelatin-Montmorillonite (MMT) bionanocomposites. The data of X-ray diffraction and transmission electron microscopy indicate that freezing/thawing is an effective approach to exfoliate the clay for concentrations higher than 5 mass% in gelatin matrix. In addition, after freezing/thawing process to introduce, the crystallinity (triple-helix content) of gelatin-MMT bionanocomposites is improved, revealing that freezing/thawing method has the advantages for gelatin molecules to renature into triple-helix. Specially, the data of Fourier transform infrared indicate that freezing/thawing may be induce more hydrogen bond interactions in gelatin-MMT bionanocomposites due to the better dispersion of MMT. The mechanical measurements and thermogravimetric analysis show that gelatin-MMT bionanocomposites prepared by freezing/thawing display enhanced mechanical properties and thermal stability in comparison with the ones prepared by conventional blending at the same clay content. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
- Subjects
CHEMICAL peel; MONTMORILLONITE; NANOCOMPOSITE materials; MECHANICAL behavior of materials; CRYSTALLIZATION; FOURIER transform infrared spectroscopy
- Publication
Journal of Applied Polymer Science, 2013, Vol 128, Issue 5, p3141
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.38511