摘要:
An apparatus for forming an object by an additive process, commonly referred to as 3-D printing, is provided. The apparatus includes a filament comprising a series of irregularities along the length of the filament, a nozzle depositing a layer of melted material onto a surface and a feeder feeding the filament to the nozzle. A heating element melts the filament and a controller controls the position of the nozzle in a plane to control the configuration of the layer of melted material deposited by the nozzle. Additionally, a method for forming polymer filament used in 3-D printing devices is also provided. The method includes the steps of melting a polymer, selecting an extrusion characteristic calculated to induce a polymer flow instability and extruding the melted polymer using the selected extrusion characteristic to produce an extrusion having distortions created by the polymer flow instability.
摘要:
A method for solubilizing recombinant spider silk proteins in an aqueous solutions, where the method includes mixing recombinant spider silk proteins with water to form a mixture and heating the mixture in a closed vessel to form a solution.
摘要:
A composite material includes a cementitious composition and a plurality of fibers disposed in the cementitious composition. Each of the plurality of fibers includes a plastic component. Each of the plurality of fibers further includes a surfactant and a metal oxide, each independently heterogeneously dispersed throughout each of the plurality of fibers. A method of forming the composite material includes the step of combining the plastic component, the surfactant, and the metal oxide, to form the plurality of fibers. The method further includes the step of disposing the plurality of fibers in the cementitious composition to form the composite material.
摘要:
The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.
摘要:
The present invention provides methods for producing a silk protein spinning dope solution suitable for producing high toughness fibres, the thus produced silk protein spinning dope solution, methods for producing fibres using said silk protein spinning dope solution.
摘要:
Disclosed is a polyamide synthesized from biobased monomers. The polyamide comprises the repeating unit of formula (I) below. In which R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics. Also disclosed are a process for preparing said polyamide, uses of said polyamide, and articles and compositions comprising said polyamide.
摘要:
A method of forming an array of aligned, uniform-length carbon nanotubes on a planar surface of a substrate employing a composite catalyst layer of iron and cobalt. The carbon nanotubes have visible length and are useful for producing spun threads of carbon nanotubes having improved spinability and mechanical and electrical properties.
摘要:
La présente invention a pour objet un procédé de préparation de granulés de polyamide présentant des propriétés de résistance à la chaleur, ainsi que l'utilisation de ces granulés, notamment dans le domaine de la fabrication de fils pour sacs gonflables de sécurité ou pour câbles pour pneumatiques. Plus précisément, l'invention se rapporte à un procédé de préparation de granulés de polyamide présentant des propriétés de résistance à la chaleur par imprégnation humide des granulés avec une solution aqueuse comprenant au moins un agent de stabilisation thermique.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von festen Zellulosefilamenten oder -folien aus einer Lösung von Zellulose, NMMO (N-Methyl-Morpholin-N-oxid) und Wasser, durch Extrudieren der Lösung durch eine oder mehrere Extrusionsöffnungen unter Druck und Verfestigen des Filamente oder Folien in einem Auffangbad, wobei die Lösung zwischen den Extrusionsöffnungen und dem Auffangbad durch einen Luftspalt geführt wird, wobei die Temperatur der Lösung an den Extrusionsöffnungen unter 105°C ist und der Druckunterschied zwischen dem Druck der Lösung unmittelbar vor der Extrusion und nach Extrusion im Luftspalt zwischen 8 und 40 bar ist.
摘要:
The present invention relates to a consumable biscuit product comprising an extruded biscuit portion, the body portion being formed with one or more channels disposed therein, wherein the one or more channels contain a substance which is different from the substance of the body portion and wherein at least one of the channels does not extend along the full length of the body portion. The present invention also provides a method of production of the same.