An Ultra Sensitive Pressure Sensor Embedded in a Polymer Diaphragm
- Detailed Technology Description
- This invention is an ultra sensitive pressure sensor consisting of carbon nanotubes embedded in a polymer diaphragm. During sensing, the pressure difference across the diaphragm causes it to deflect, changing the geometry and spacing of the enclosed carbon nanotubes. This allows extremely accurate pressure detection of up to 1 Pascal, simply by measuring the resistance and change within the sensor.
- Countries
- United States
- Application No.
- 9,099,224
- *Abstract
-
The nanocomposite pressure sensors include nanowiresuniformly distributed inside an elastomeric polymer. The electrical propertiesof the nanocomposites change in response to applied pressure or tensile strain,and the changes are recorded using an electrical measuring device.
The nanocomposites are carbon nanotubes or multi-walledcarbon nanotubes, placed as a line, a curve or combination thereof inside apolymer matrix. The polymer matrix may be chosen from: polydimethylsiloxane(PDMS), silicone elastomer, vinyl acetate, ethylene propylene rubber,polyimide, polytetrafluoroethylene (PTFE), poly(p-xylylene) polymer,fluorocarbon based polymer, poly(m-ethyl methacrylate) (PMMA). The nanowiresconduct electricity and have different resistivities depending on their shapeor distribution inside the polymer matrix. Furthermore, a nanocompositeproduction method is provided that consists of using organic solvents todissolve the polymers and nanowires, and pattern-making devices to create thedesired shapes.
- *IP Issue Date
- Aug 4, 2015
- *IP Type
- Utility
- *Licensing
- Brian SheddAssistant DirectorTel: 225-615-8941Email: brianshedd@lsu.edu
- Country/Region
- USA
