An additive manufacturing system for extraction of impurities in additive manufacturing material, the system including an additive manufacturing machine for manufacturing a part using additive manufacturing material. The system may additionally include a conductive plate adjacent to the additive manufacturing material. The system can further include an energy source for distributing an electric charge through the conductive plate adjacent to the additive manufacturing material. Distributing the electric charge through the conductive plate can attract impurities from the additive manufacturing material to the conductive plate.

Methods of forming solid carbon products include disposing a plurality of nanotubes in a press, and applying heat to the plurality of carbon nanotubes to form the solid carbon product. Further processing may include sintering the solid carbon product to form a plurality of covalently bonded carbon nanotubes. The solid carbon product includes a plurality of voids between the carbon nanotubes having a median minimum dimension of less than about 100 nm. Some methods include compressing a material comprising carbon nanotubes, heating the compressed material in a non-reactive environment to form covalent bonds between adjacent carbon nanotubes to form a sintered solid carbon product, and cooling the sintered solid carbon product to a temperature at which carbon of the carbon nanotubes do not oxidize prior to removing the resulting solid carbon product for further processing, shipping, or use.

A three-dimensional (3D) bioprinting method and system are disclosed. The method includes disposing/immersing a printing platform or surface into a first bioink, such as a bioink resin, curing one or more layer of the first bioink resin onto the printing platform or surface, and removing the printing platform or surface from the first bioink resin. The process is repeated with a second bioink resin such that the second bioink resin is cured on top of the one or more layer of first bioink resin, and can be further repeated with a third or even fourth bioink resin. By varying constituents of one or more or each bioink resin (such as living cell type or polymer), complex, multilayered tissues can be engineered. A system capable of performing the method is also disclosed.

Low-density thermoplastic expandable microspheres are disclosed. Various low-density structures, in particular, sandwich panels, based on foam prepared from the low-density microspheres, are also disclosed. Process of preparing low-density polymeric microspheres, per se, and the corresponding low-density structures, based on the microsphere foam, are also disclosed.

A 3-D (three dimensional) printing system is provided that includes a customized matrix having suitable material properties and geometric patterning to facilitate filling and retention of one or more filler material. The customized matrix defines the geometry and shape of the object. A filler mechanism that fills the customized matrix with one or more filler materials. The one or more filler materials retained within the customized matrix are cured or solidified to produce the object.

The disclosure relates to a cell electrochemical sensor based on a 3D printing technology and application thereof and belongs to the technical field of electrochemical sensors and toxin detection. The cell electrochemical sensor of the disclosure is constructed based on a 3D printing technology, and the construction method comprises the following steps: precisely depositing a cell/carbon nanofiber/GelMA composite hydrogel on a working electrode of a screen-printed carbon electrode through 3D printing, and carrying out curing to obtain the cell electrochemical sensor. The disclosure constructs a cell electrochemical sensor with a three-dimensional cell growth environment and rapid and sensitive response. The cell electrochemical sensor constructed by the disclosure can be used for quickly and effectively determining the combined effect type and effect degree of deoxynivalenol family toxins by combining an electrochemical impedance method and a combination index method.

According to an embodiment of the disclosure, a device with the capability of performing both conventional bioprinting and electrohydrodynamic printing (EHDP) is provided. The disclosure also provides methods of using the described device, methods of optimization of printing parameters, methods of position calibration, methods of selecting or creating voltage waveforms, and other methods relating to the fabrication device.

Presented herein are materials, methods, and systems for the improved 3D printing improved 3D printing of materials that include polypropylene. In some embodiments, the present disclosure provides a composite comprising a polymer matrix and a plurality of fibers for improved 3D printing. For example, the polymer matrix may have a composition that includes a polymer blend of polypropylene (PP) and polyethylene (PE) (e.g., high density polyethylene (HDPE), low density polyethylene (LDPE), linear low-density polyethylene (LLDPE)), impact modified polypropylene copolymer and/or polypropylene random copolymer with a plurality of fibers. In some embodiments, the plurality of fibers comprises cellulosic nanofibers (e.g., natural cellulosic nanofibers, e.g., cellulose nanofibrils). In some embodiments, filaments are prepared from the composites by melt compounding the polymer matrix (e.g., PP copolymers and/or PP/PE pellets) with a plurality of fibers and extruding the mixture.

Methods of forming solid carbon products include disposing a plurality of nanotubes in a press, and applying heat to the plurality of carbon nanotubes to form the solid carbon product. Further processing may include sintering the solid carbon product to form a plurality of covalently bonded carbon nanotubes. The solid carbon product includes a plurality of voids between the carbon nanotubes having a median minimum dimension of less than about 100 nm. Some methods include compressing a material comprising carbon nanotubes, heating the compressed material in a non-reactive environment to form covalent bonds between adjacent carbon nanotubes to form a sintered solid carbon product, and cooling the sintered solid carbon product to a temperature at which carbon of the carbon nanotubes do not oxidize prior to removing the resulting solid carbon product for further processing, shipping, or use.

A method for enhancing fracture toughness of a composite laminate is disclosed. The method includes fabricating a nanofiber yarn, forming a nanofiber yarn layer by aligning the nanofiber yarn in form of a layer, forming a laminated structure by interleaving the nanofiber yarn layer into a plurality of fabric layers, forming the composite laminate by subjecting the laminated structure to a vacuum infusion process (VIP), and curing the composite laminate. Forming the laminated structure includes stacking a plurality of fabric layers onto each other and placing the nanofiber yarn layer between two fabric layers of the plurality of fabric layers. The VIP includes forming a sealed laminated structure by sealing the laminated structure, forming a vacuumed laminated structure by vacuuming the sealed laminated structure, and introducing a resin matrix into the vacuumed laminated structure.