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Freezing/thawing effects on the exfoliation of montmorillonite in gelatin-based bionanocomposite
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.
Freezing/thawing effects on the exfoliation of montmorillonite in gelatin-based bionanocomposite
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.
Freezing/thawing effects on the exfoliation of montmorillonite in gelatin-based bionanocomposite
Mu, Changdao (author) / Li, Xinying (author) / Zhao, Yige (author) / Zhang, Hanguang (author) / Wang, Liangjie (author) / Li, Defu (author)
Journal of Applied Polymer Science ; 128 ; 3141-3148
2013
8 Seiten, 7 Bilder, 3 Tabellen, 42 Quellen
Article (Journal)
English
Freezing and thawing of montmorillonite — A time-resolved synchrotron X-ray diffraction study
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