Piezoelectric films including ionic liquids and methods of making piezoelectric films including ionic liquids. The resulting films have higher levels of beta phase and can be poled using external fields without additional treatment, such as stretching. The films are light-transparent. In some embodiments, the piezoelectric material is used to create piezo-electrophoretic films that can be patterned for use as security markers, authentication films, or sensors. The films are generally flexible. Some films are less than 100 μm in thickness. Electrophoretic displays formed from the piezoelectric films do not require an external power source.

The present invention provides a composition for forming a polyvinylidene fluoride film, which contains: a polyvinylidene fluoride; at least one surfactant that is selected from among sulfuric acid-based surfactants, sulfonic acid-based surfactants and quaternary ammonium salt type surfactants; and a solvent.

The present invention provides a composition for forming a polyvinylidene fluoride film, which contains: a polyvinylidene fluoride; at least one surfactant that is selected from among sulfuric acid-based surfactants, sulfonic acid-based surfactants and quaternary ammonium salt type surfactants; and a solvent.

The invention relates to a purification method for purifying a vinylidene fluoride polymer comprising at least one impurity, the method comprising the following steps: washing of the vinylidene fluoride polymer with a stream of supercritical fluid; and extraction of residual supercritical fluid from the vinylidene fluoride polymer.

The invention also relates to a vinylidene fluoride polymer, a fluid conveyance part comprising or consisting of said polymer; as well as the use of said fluid conveyance part.

The invention relates to a purification method for purifying a vinylidene fluoride polymer comprising at least one impurity, the method comprising the following steps: washing of the vinylidene fluoride polymer with a stream of supercritical fluid; and extraction of residual supercritical fluid from the vinylidene fluoride polymer.

The invention also relates to a vinylidene fluoride polymer, a fluid conveyance part comprising or consisting of said polymer; as well as the use of said fluid conveyance part.

The present invention relates to a process for producing a stable fluorinated latex by emulsion polymerization in the absence of fluorinated surfactant, stabilized by an amphiphilic block copolymer formed in situ. The invention also concerns the aqueous dispersion comprising the fluorinated polymer chains and the amphiphilic block copolymers, obtained by this process.

The present invention relates to a process for producing a stable fluorinated latex by emulsion polymerization in the absence of fluorinated surfactant, stabilized by an amphiphilic block copolymer formed in situ. The invention also concerns the aqueous dispersion comprising the fluorinated polymer chains and the amphiphilic block copolymers, obtained by this process.

A method for manufacturing resin particles is provided. The method includes the steps of: dissolving a resin free of poly(lactic-co-glycolic acid) (PLGA) in a good solvent of the resin to prepare a resin solution; and discharging the resin solution from at least one discharge hole having an inner diameter of less than 1,000 μm into a poor solvent of the resin to form resin particles.

A method for manufacturing resin particles is provided. The method includes the steps of: dissolving a resin free of poly(lactic-co-glycolic acid) (PLGA) in a good solvent of the resin to prepare a resin solution; and discharging the resin solution from at least one discharge hole having an inner diameter of less than 1,000 μm into a poor solvent of the resin to form resin particles.

The present invention pertains to an aqueous dispersion of a vinylidene fluoride polymer having a high molecular weight and possessing a substantially linear structure, leading to reduced amount of gels/insoluble fractions, to a method for its preparation and to its use for the manufacture of electrochemical cell components, such as electrodes and/or composite separators or for the manufacture of membranes.