GRAPHENE OXIDE-DOPED POLYVINYLIDENE FLUORIDE PARTICLES WITH ENHANCED BETA-PHASE CRYSTALLINITY
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United States of America Patent
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Issued Date -
Jun 13, 2024
app pub date -
Feb 19, 2024
filing date -
Jun 14, 2021
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Abstract
High spherical particles for use in piezoelectric applications may be produced mixing a mixture comprising a graphene oxide-polyvinylidene fluoride (GO-PVDF) composite, a carrier fluid that is immiscible with the PVDF, and optionally an emulsion stabilizer at a temperature equal to or greater than a melting point or softening temperature of the PVDF to disperse the GO-PVDF composite in the carrier fluid, wherein the GO-PVDF composite has a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less; cooling the mixture to below the melting point or softening temperature of the PVDF to form GO-PVDF particles; and separating the GO-PVDF particles from the carrier fluid, wherein the GO-PVDF particles comprise the graphene oxide dispersed in the PVDF, and wherein the GO-PVDF particles have a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less.
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