Apr 18, 2013
Split-press-merge process aligns graphene nanosheets in composites
Using a simple split-press-merge process, scientists in China have shown that two-dimensional nanomaterials, few-layer graphene nanosheets, can be aligned in paraffin. The team observed an enhancement in the electromagnetic interference (EMI) shielding properties of the composite following alignment of the graphene nanosheets.
Researchers at Beijing Institute of Technology are studying the fabrication of nanocomposites using low-dimensional nanomaterials, such as nanoparticles, nanotubes, nanorods, nanoneedles and nanosheets, as well as investigating the related physical properties of the final samples.
The results so far demonstrate that alignment of graphene nanosheets using the split-press-merge process delivers a material with enhanced absorption and reflection performance. This is due to improved conducting interconnection and enlarged effective reflection regions, resulting in an enhancement in EMI shielding.
It is notable to see that the split-press-merge approach could be applied to align various two-dimensional materials in matrices with good expandability, such as paraffin. This technology not only demonstrates a way to fabricate high-performance EMI shielding composites, but also provides a route to modify the physical properties of the sample by changing the distribution state of fillers with various applications.
Full details can be found in the journal Nanotechnology.
About the author
Mao-Sheng Cao, PhD, is a professor in the school of materials science and engineering at Beijing Institute of Technology (Beijing, China). He is studying the physical properties of low-dimensional nanomaterials. Wei-Li Song received a PhD degree in Cao’s group and is currently working in the institute of advanced materials and technology at the University of Science and Technology Beijing (Beijing, China). He is mainly focused on the development of nanomaterials and nanocomposites for thermal, electrical and electromagnetic properties and applications.