Stress-tuned conductor-polymer composite for use in sensors
| DWPI Title: Making stress-tuned conductor-polymer composite involves combining polymer precursor solution, stress-tuning agent and conducting particles, polymerizing obtained suspension and removing stress-tuning agent from obtained composite |
| Abstract: A method for making a composite polymeric material with electrical conductivity determined by stress-tuning of the conductor-polymer composite, and sensors made with the stress-tuned conductor-polymer composite made by this method. Stress tuning is achieved by mixing a miscible liquid into the polymer precursor solution or by absorbing into the precursor solution a soluble compound from vapor in contact with the polymer precursor solution. The conductor may or may not be ordered by application of a magnetic field. The composite is formed by polymerization with the stress-tuning agent in the polymer matrix. The stress-tuning agent is removed following polymerization to produce a conductor-polymer composite with a stress field that depends on the amount of stress-tuning agent employed. |
| Use: The method is useful for making a stress-tuned conductor-polymer composite (claimed), which is useful as a sensing film of a chemiresistor used to determine a concentration of an analyte and detect any phenomenon including shear and tensile strains, temperature change, humidity, magnetic field, electromagnetic radiation and the presence or absence of certain chemicals. |
| Advantage: The method allows simple preparation of the stress-tuned conductor-polymer composite with high electrical conductivity and reproducibility, and improves the sensitivity of the sensor. |
| Novelty: Making a stress-tuned conductor-polymer composite, comprises: combining (10) a polymer precursor solution having a first volume, a stress-tuning agent comprising at least one of a liquid miscible in the polymer precursor solution and/or compound from vapor in contact with the polymer precursor solution, and conducting particles to form a polymerizable suspension having a second volume; polymerizing (20) the polymerizable suspension to form a conductor-polymer composite; and removing (30) the stress-tuning agent from composite to form a stress-tuned conductor-polymer composite. |
| Filed: 3/2/2007 |
| Application Number: US2007681221A |
| Tech ID: SD 10430.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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