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Layered double hydroxides: Efficient fillers for waterborne nanocomposite films
Abstract Using Layered double hydroxides (LDH) nanoparticles and film-forming latexes, waterborne nanocomposite films were produced by simply a heterocoagulation and solvent casting process. Self-standing and transparent films with LDH contents from 2.5 to 15vol% were prepared. The structure, microstructure and mechanical behavior were thoroughly investigated by powder X-ray diffraction (PXRD), infrared spectroscopy (IR), transmission electron microscopy (TEM), scanning electron microscopy (FIB–SEM) and dynamic mechanical analysis (DMA). Favorable electrostatic interactions between pristine LDH and the latex ensured a good dispersion of the bidimensional LDH platelets in the films. Above a certain content of LDH, the formation of a well-defined cellular LDH network following the starting latex morphology was observed. Such a percolating microstructure induces a large mechanical reinforcement significant of a mechanical percolation behavior.
Graphical abstract Display Omitted
Highlights Preparation of waterborne latex/LDH based nanocomposite films The content of the LDH into the films was varied from 2.5vol% to 15vol%. SEM and TEM showed the formation of a cellular network. Above 2.5vol% LDH layers form a percolating mechanical network with a very large reinforcement efficiency.
Layered double hydroxides: Efficient fillers for waterborne nanocomposite films
Abstract Using Layered double hydroxides (LDH) nanoparticles and film-forming latexes, waterborne nanocomposite films were produced by simply a heterocoagulation and solvent casting process. Self-standing and transparent films with LDH contents from 2.5 to 15vol% were prepared. The structure, microstructure and mechanical behavior were thoroughly investigated by powder X-ray diffraction (PXRD), infrared spectroscopy (IR), transmission electron microscopy (TEM), scanning electron microscopy (FIB–SEM) and dynamic mechanical analysis (DMA). Favorable electrostatic interactions between pristine LDH and the latex ensured a good dispersion of the bidimensional LDH platelets in the films. Above a certain content of LDH, the formation of a well-defined cellular LDH network following the starting latex morphology was observed. Such a percolating microstructure induces a large mechanical reinforcement significant of a mechanical percolation behavior.
Graphical abstract Display Omitted
Highlights Preparation of waterborne latex/LDH based nanocomposite films The content of the LDH into the films was varied from 2.5vol% to 15vol%. SEM and TEM showed the formation of a cellular network. Above 2.5vol% LDH layers form a percolating mechanical network with a very large reinforcement efficiency.
Layered double hydroxides: Efficient fillers for waterborne nanocomposite films
Veschambres, Cyril (author) / Halma, Matilte (author) / Bourgeat-Lami, Elodie (author) / Chazeau, Laurent (author) / Dalmas, Florent (author) / Prevot, Vanessa (author)
Applied Clay Science ; 130 ; 55-61
2016-01-19
7 pages
Article (Journal)
Electronic Resource
English
Layered double hydroxides: Efficient fillers for waterborne nanocomposite films
| Online Contents | 2016
Layered double hydroxides: Efficient fillers for waterborne nanocomposite films
| Online Contents | 2016
| Wiley | 2020