Abstract: A photoresin formulation for volumetric additive manufacturing contains a photo-curable mixture of: a monomer (e.g., an acrylate-based monomer); a photoinitiator; a polymerization inhibitor (e.g., molecular oxygen (O2)); and, a reducing agent reactive with a free radical species (e.g., a peroxyl radical) formed from the polymerization inhibitor. The reducing agent permits faster printing of objects from the photoresin formulation in a volumetric additive manufacturing process to produce 3D objects of high fidelity.

Abstract: An antenna and a formulation and method for making the antenna are disclosed. The antenna comprises: a first phase comprising at least one polymer; a second phase comprising at least one first component; and, optionally; and an interface between the first and second phases, wherein the interface has a concentration gradient of the at least one first component, whereby the concentration of the at least one first component decreases with distance away from the second phase towards the first phase, wherein the at least one first component comprises at least one functional component, at least one functional precursor component, or combinations thereof, and the at least one first component, in combination with the at least one polymer, has a high dielectric constant and/or a low dielectric loss tangent, wherein the antenna is a functional antenna, a functional precursor antenna, or a combination of a functional and functional precursor antenna.

Abstract: A system for forming an object having a three-dimensional structure, the system comprising: a container for providing a photo-curable material to be polymerized; a rotatable stage for supporting the container; a light source for providing light rays having at least one light pattern to be guided into the container via an optical assembly; a processing unit for determining the light source's degree of non-telecentricity, and determining an optimally pre-distorted set of the at least one light pattern based on at least the photo-curable material's refractive index; correcting at least one distortion of the light rays caused by refraction at the container interface and/or correcting at least one distortion of the light rays caused by non-telecentricity; and whereby the correction of the at least one distortion of the light rays is performed without altering the calibration of the optical assembly.

Abstract: A copper-based ink contains copper acetate, 3-dimethylamino-1,2-propanediol and a silver salt. The ink may be coated on a substrate and decomposed on the substrate to form a conductive copper coating on the substrate. The ink provides micron-thick traces and may be screen printed and thermally sintered in the presence of up to about 500 ppm of oxygen or photo-sintered in air to produce highly conductive copper features. Sintered copper traces produced from the ink have improved air stability, and have improved sheet resistivity for 5-20 mil wide screen-printed lines with excellent resolution.

Abstract: A molecular ink contains a silver carboxylate, an organic amine compound, an organic polymer binder, a surface tension modifier, and a solvent. The ink may be used to produce conductive silver traces on a substrate for use in fabricating electronic devices. The ink is particularly useful for producing conductive silver traces on a shapeable (e.g. stretchable) substrate in a low temperature sintering process.

Abstract: A printable molecular ink that is can be treated (e.g. dried or curable) and sintered using broad spectrum ultraviolet light is provided to produce electrically conductive traces on a low temperature substrate, for example PET. The ink includes a silver or copper carboxylate, an organic amine compound, and may include a thermal protecting agent.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer matrix comprising a first polymer material and a second polymer material that are immiscible with each other, and a plurality of piezoelectric particles located in at least a portion of the polymer matrix. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

Abstract: The present disclosure is directed towards a formulation for piezoelectric materials. The formulation may be printed including 2D or 3D printing. The formulation contains ceramic particles, a sol-gel, a high boiling point solvent and a binder.

Abstract: A molecular ink contains: a silver carboxylate; and a polymeric binder comprising a polyester, polyimide, polyether imide or any mixture thereof having functional groups that render the polymeric binder compatible with the organic amine. Such an ink may have higher silver loading, lower viscosity and lower processing temperatures than existing silver inks.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles and a polymer material comprising at least one thermoplastic polymer and at least one thermally curable polymer precursor. At a sufficient temperature, the at least one thermally curable polymer precursor may undergo a reaction, optionally also undergoing a reaction with the piezoelectric particles, and form an at least partially cured printed part. The piezoelectric particles may be mixed with the polymer material and remain substantially non-agglomerated when combined with the polymer material.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions that are extrudable and comprise a plurality of piezoelectric particles and a plurality of carbon nanomaterials dispersed in at least a portion of a polymer material. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further containing at least one polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles dispersed in at least a portion of a polymer matrix comprising first polymer material and a sacrificial material, the sacrificial material being removable from the polymer matrix to define a plurality of pores in the polymer matrix. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The sacrificial material may comprise a second polymer material. The compositions may define a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes may comprise forming a printed part by depositing the compositions layer-by-layer and introducing porosity therein.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer matrix comprising a first polymer material and a second polymer material that are immiscible with each other, and a plurality of piezoelectric particles substantially localized in one of the first polymer material or the second polymer material. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The compositions may define a form factor such as a composite filament, a composite pellet, or an extrudable composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer material comprising at least one thermoplastic polymer, and a plurality of piezoelectric covalently bonded to the at least one thermoplastic polymer and dispersed in at least a portion of the polymer material. The compositions are extrudable and may be pre-formed into a form factor suitable for extrusion. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles non-covalently interacting with at least a portion of a polymer material via ?-? bonding, hydrogen bonding, electrostatic interactions stronger than van der Waals interactions, or any combination thereof. The piezoelectric particles may be dispersed in the polymer material and remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further including a polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles and a polymer material comprising at least one thermoplastic polymer and at least one photocurable polymer precursor. The at least one photocurable polymer precursor may undergo a reaction in the presence of electromagnetic radiation, optionally undergoing a reaction with the piezoelectric particles, in the course of forming the printed part. The piezoelectric particles may be mixed with the polymer material and remain substantially non-agglomerated when combined with the polymer material.

Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles located in a polymer matrix comprising a first polymer material and a sacrificial material that are immiscible with each other. The sacrificial material, which may comprise a second polymer material, may be removable from the first polymer material under specified conditions. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The polymer matrix may be treated to remove the sacrificial material to introduce a plurality of pores. The compositions may have a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste.

Abstract: Functional and/or functional precursor products, formulations for making the products, methods of making the products (e.g. functional coatings, concentrated gradients, and/or composites), and uses thereof are provided. In an aspect, the method comprises a) combining at least one first polymerizable component and at least one second polymerizable component to form a composition; and b) polymerizing the at least one first polymerizable component to form at least one first polymer structure, wherein at least two phases are formed from the at least one first polymer structure and the at least one second polymerizable component, and wherein the product is a functional product, a functional precursor product, or a combination of a functional and functional precursor product.

Abstract: An antenna and a formulation and method for making the antenna are disclosed. The antenna comprises: a first phase comprising at least one polymer; a second phase comprising at least one first component; and, optionally; and an interface between the first and second phases, wherein the interface has a concentration gradient of the at least one first component, whereby the concentration of the at least one first component decreases with distance away from the second phase towards the first phase, wherein the at least one first component comprises at least one functional component, at least one functional precursor component, or combinations thereof, and the at least one first component, in combination with the at least one polymer, has a high dielectric constant and/or a low dielectric loss tangent, wherein the antenna is a functional antenna, a functional precursor antenna, or a combination of a functional and functional precursor antenna.

Abstract: A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C8-C12 silver carboxylate and 0.1-10 wt % of a polymeric binder, or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate and 0.25-10 wt % of a polymeric binder, and balance of at least one organic solvent, wherein the binder has ethyl cellulose, and the ethyl cellulose has an average weight molecular weight in a range of 60,000-95,000 g/mol and a bimodal molecular weight distribution.