Electromagnetic interference shielding carbon nanotube non-woven fabric and method of manufacturing the same

Technology for Carbon Nanotube Nonwoven Fabric for Electromagnetic Shielding

This technology relates to a carbon nanotube nonwoven fabric for electromagnetic shielding and a method for manufacturing it. In particular, it is a technology capable of producing a nonwoven fabric with excellent mechanical strength and significantly low basis weight while ensuring shielding from electromagnetic waves.

Existing nanocarbons modified through acid treatment suffered from a decline in mechanical, chemical, and electrical properties due to damage to their intrinsic structure, resulting in performance degradation of nanocarbon/polymer composites. Accordingly, we propose a solution to this problem using carbon-based fibers, carbon nanotube powder, and a water-soluble, highly branched supramolecular linker with hydrophobic monomeric functional groups introduced at the ends to form non-covalent bonds with the carbon-based fibers.

Accordingly, this technology allows for the expectation of excellent mechanical strength and shielding effects against electromagnetic waves for carbon nanotube nonwoven fabrics, and offers advantageous benefits in terms of applicability and operational efficiency.

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Key Features:

• A carbon nanotube nonwoven fabric for electromagnetic shielding in which carbon nanotube powder and carbon-based fibers are bonded via a supramolecular linker.
• The polymer main chain of the supramolecular linker is a water-soluble hyperbranched polyglycerol having at least three branches.
• The water-removed carbon nanotube nonwoven fabric composition is heat-pressed under specified pressure and temperature conditions.
• The carbon nanotube nonwoven fabric for electromagnetic shielding can be manufactured in an environmentally friendly manner using a water-based method.

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