The present invention relates to a process for additive manufacturing of polymeric nano-micron sized fiber-based material. Biopolymers such as chitin and chitosan may be used to make useful and green materials. Tuning the printing properties can modulate mechanical, thermal, and electrical properties of the final material. Different methods to tune properties include controlling the solution chemistry and the flow processing (i.e., fiber extrusion via direct ink write printing and possible electrospinning). The primary application is to make 3D materials of multifunctional fibers that can be utilized in structural composites, textiles, biomedical scaffolds, batteries, catalytic or physical and chemical separation membranes.

The present application relates to a recyclable material. The recyclable material comprises 30-97% by weight of cellulose material, 2-45% by weight of at least one protein binder, 1-20% by weight of at least one alcohol or ester and 0-45% by weight of at least one additive. Furthermore, the present application relates to a process for producing a recyclable material and to a molded part produced therefrom.

A polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object of polyurethane, polyurea, or a copolymer thereof, is described. The resin includes at least one of (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender.

Provided is a manufacturing method of a sheet having needle-like protrusions capable of individually manufacturing sheets on a mold. The manufacturing method of a sheet having needle-like protrusions includes, for a mold provided with needle-like recesses and an annular groove provided around a region where the needle-like recesses are formed, a first polymer solution supplying step of supplying a first polymer solution, which is to become a first layer, to the needle-like recesses; a second polymer solution supplying step of filling the needle-like recesses and the groove with a second polymer solution by supplying the second polymer solution, which is to become a second layer, to a surface of the mold; a drying step of forming a laminate of the first layer and the second layer by drying the first polymer solution and the second polymer solution; and a peeling step of peeling the laminate away from the mold.

Methods for producing a battery separator are provided. The methods include applying a liquid precursor material to a substrate to generate a coating layer on the substrate. The liquid precursor material includes a polymer, and a first solvent. The methods also include precipitating the polymer from the liquid precursor material in the coating layer to form a polymer membrane, and drying the polymer membrane to generate a battery separator.

Provided is a method of producing a transdermal absorption sheet using an electroforming mold. A method of manufacturing an electroforming mold includes preparing a mold which is a matrix having a recessed pattern, immersing the mold in a degassed pretreatment liquid stored in a pretreatment liquid tank, then applying ultrasound waves generated from an ultrasound oscillator to the recessed pattern of the mold, and filling recessed portions constituting the recessed pattern with the pretreatment liquid. By immersing the mold in an electroforming tank and performing an electroforming treatment, an electroforming mold is manufactured. A mold having a recessed pattern is manufactured from the electroforming mold and a transdermal absorption sheet is produced using the mold.

Systems, devices and methods are provided for fabricating anisotropic polymer materials. According to various embodiments, a fluidic device is employed to distribute a polymer solution and a flow-confining solution in order to generate a layered flow, where the layered flow is formed such that a polymer liquid sheet is sheathed on opposing sides by flow-confining liquid sheets. The fluidic device includes first and second fluid conduits, where the first fluid conduit receives the layered flow. The second fluid conduit has a reduced height relative to the first fluid conduit, such that the layered flow is constricted as it flows through the second fluid conduit. The constriction formed by the second flow conduit causes hydrodynamic focusing, reducing the thickness of the polymer liquid sheet, and inducing molecular alignment and anisotropy within the polymer liquid sheet as it is hardened and as strain is applied during extrusion of the sheet.

A method for preparing a pyroelectric polymer film based on a combined process of solution casting and uniaxial stretching is disclosed. The pyroelectric polymer film is firstly prepared by solution casting, afterwards, the casted film is subjected to uniaxial stretching when the film is in a semi-cured state (wet film). Thus a larger stretching ratio (>10) at a lower temperature (even at room temperature) is realized. Without undergoing a further poling process, the as-stretched film does have a fairly good pyroelectric performance. Moreover, the surface of the stretched film is smoother and having less surface defects.

A polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object of polyurethane, polyurea, or a copolymer thereof, is described. The resin includes at least one of (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender.

A system comprises one or more print heads (18,20,22) configured to selectively print droplets (34,36,38) of one or more polycarbonate precursor solutions comprising one or more polycarbonate precursor compounds onto one or more target locations on a substrate to form one or more reactive mixture droplets at each target location, and an environmental system configured to expose the reactive mixture droplets to reaction conditions that polymerize the one or more polycarbonate precursor compounds to form a polycarbonate. A method comprises printing droplets of one or more polycarbonate precursor solutions comprising one or more polycarbonate precursor compounds onto one or more target locations on a substrate to form a reactive mixture droplet at each target location, and exposing the reactive mixture droplets to reaction conditions to polymerize the one or more polycarbonate precursor compounds to form a polycarbonate.