US 12,441,866 B1
Nanocomposites comprising 2D materials and a shape memory polymer and fabrication methods thereof
Arvind Agarwal, Miami, FL (US); Luiza Benedetti, Miami, FL (US); Kazue Orikasa, Miami, FL (US); and Branon Aguiar, Miami, FL (US)
Assigned to The Florida International University Board of Trustees, Miami, FL (US)
Filed by Arvind Agarwal, Miami, FL (US); Luiza Benedetti, Miami, FL (US); Kazue Orikasa, Miami, FL (US); and Branon Aguiar, Miami, FL (US)
Filed on Jun. 21, 2024, as Appl. No. 18/750,494.
Int. Cl. C08K 3/04 (2006.01); B29C 64/209 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C08G 18/10 (2006.01); C08K 3/30 (2006.01); C08K 3/38 (2006.01)
CPC C08K 3/042 (2017.05) [B29C 64/209 (2017.08); C08G 18/10 (2013.01); C08K 3/30 (2013.01); C08K 3/38 (2013.01); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08G 2280/00 (2013.01); C08K 2003/3009 (2013.01); C08K 2003/385 (2013.01); C08K 2201/011 (2013.01)] 9 Claims
 
1. A method of fabricating a nanocomposite, the method comprising:
preparing a solution comprising two-dimensional (2D) nanoparticles dispersed in a solvent;
applying the solution to a filament of a shape memory polymer (SMP) to give a coated filament; and
using the coated filament to three-dimensional (3D) print a structure, the structure comprising the nanocomposite,
the applying of the solution to the filament comprising:
disposing the solution in a reservoir cup of an airbrush;
securing the reservoir cup with a lid of the airbrush; and
using the airbrush to spray the solution on the filament,
the spraying of the solution on the filament comprising spraying with a standoff distance between the airbrush and the filament in a range of from 5 centimeters (cm) to 30 cm/s,
a nozzle diameter of the airbrush being in a range of from 0.1 millimeters (mm) to 1.5 mm,
the spraying of the solution on the filament being preformed at a temperature in a range of from 20° C. to 30° C. and a pressure in a range of 0.8 atmosphere (atm) to 1.2 atm,
a number of layers of the solution applied during the spraying of the solution on the filament being in a range of from 1 to 10 layers,
the using of coated filament to 3D print a structure comprising 3D printing with a infill density of at least 99%, an extruder temperature of at least 150° C., a build plate temperature in a range of from 15° C. to 35° C., and a printing speed of at least 5 millimeters per second (mm/s),
the 2D nanoparticles being graphene, hexagonal boron nitride, or tungsten disulfide (WS2), and
the SMP being shape memory polyurethane.