PASSIVE SENSING FIBER COMPOSITIONS AND COMPOSITES THEREOF
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United States of America Patent
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Issued Date -
Sep 15, 2022
app pub date -
Mar 9, 2022
filing date -
Mar 10, 2021
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Abstract
A composition comprising: (i) an electrically non-conductive fiber having a surface; and (ii) piezoelectric particles adhered to the surface of said electrically non-conductive fiber, and optionally, (iii) a sizing agent (e.g., epoxy) coated over the piezoelectric particles and surface of the electrically non-conductive fiber. Also described are composites in which the above fiber composition is embedded within a matrix, e.g., a polymer, ceramic, or glassy carbon matrix. Also described is a method for producing a passive sensing fiber composition by: coating a fiber having a surface with a liquid suspension containing piezoelectric particles suspended in a solvent; and removing the solvent to result in the piezoelectric particles adhered to the surface of the fiber. Also described are methods for detecting formation of defects in a material and methods of generating electrical energy from ambient vibration by use of the above described fiber compositions and composites thereof.
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