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Lamellar carbon-aluminosilicate nanocomposites with macroscopic orientation
Dragana Paripović1, Lucia Hartmann, Hans-Georg Steinrück
1Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Materials, Laboratory of Macromolecular and Organic Materials, Station 12, 1015 Lausanne, Switzerland. holger.frauenrath@epfl.ch.
Nanoscale
|September 3, 2021
Summary
Researchers developed a new method to create ordered carbon-aluminosilicate nanocomposites. This technique uses co-assembly and shear-induced alignment for advanced material applications.
Area of Science:
- Materials Science
- Nanotechnology
- Composite Materials
Background:
- Developing novel preparative approaches for lamellar nanocomposites is crucial for diverse technological applications.
- Carbon-inorganic material nanocomposites offer unique properties for advanced uses.
Purpose of the Study:
- To describe a method for preparing carbon-aluminosilicate nanocomposites with controlled lamellar orientation and macroscopic order.
- To utilize the co-assembly of a liquid-crystalline hexaphenylene amphiphile and an aluminosilicate precursor.
Main Methods:
- Co-assembly of a liquid-crystalline hexaphenylene amphiphile and an aluminosilicate precursor.
- Shear-induced alignment of the precursor phase to form thin films.
- Pyrolysis of the aligned precursor to yield carbon-aluminosilicate nanocomposites.
Main Results:
- Achieved thin films with lamellae exhibiting molecular length-scale periodicities.
- Demonstrated "edge-on" orientation of lamellae relative to the substrate, parallel to the shearing direction.
- Preserved lamellar structure, orientation, and macroscopic alignment after pyrolysis, resulting in ordered nanocomposites on the centimeter length scale.
Conclusions:
- The described co-assembly and shear-alignment method effectively produces highly ordered carbon-aluminosilicate nanocomposites.
- This approach offers precise control over lamellar orientation and macroscopic alignment, crucial for material performance.
- The preserved structure after pyrolysis highlights the robustness of the preparative technique for technological applications.
