Abstract: An electrically conductive printable composition comprises silver particles, a dispersing agent, a solvent, a first surfactant, comprising a hydrocarbon based surfactant, and a second surfactant, comprising a fluoro-based surfactant.

Abstract: The invention relates to a method for producing a metal nanoparticle dispersion, in particular a silver nanoparticle dispersion, wherein after the production of nanoscale metal particles, stabilized by means of at least one auxiliary dispersing agent containing at least one free carboxylic acid group or salt thereof as a functional group, in at least one liquid dispersant (solvent), flocculation of the metal nanoparticles is deliberately caused, the formed metal nanoparticle flocculation is dispersed again in at least one liquid dispersant, optionally by adding a base, and the metal nanoparticle dispersion is set to a desired metal nanoparticle concentration. The invention further relates to a metal nanoparticle dispersion, in particular a silver nanoparticle dispersion, in particular produced by means of the method according to the invention, and to the use of said metal nanoparticle dispersion.

Abstract: Apparatus and method for producing electrically conducting nanostructures by means of electrospinning, the apparatus having at least a substrate holder (1), a spinning capillary (2), connected to a reservoir (3) for a spinning liquid (4) and to an electrical voltage supply (5), an adjustable movement unit (6, 6?) for moving the spinning capillary (2) and/or the substrate holder (1) relative to one another, an optical measuring device (7) for monitoring the spinning procedure at the outlet of the spinning capillary (2), and a computer unit (8) for controlling the drive of the spinning capillary (2) relative to the substrate holder (1) in accordance with the spinning procedure.

Abstract: Printable compositions comprising: (a) 5 to 40 parts by weight of silver nanoparticles having a maximum effective diameter of 150 nm, as determined by laser correlation spectroscopy; (b) 50 to 99.5 parts by weight of water; (c) 0.01 to 15 parts by weight of a dispersing agent; (d) 0.5 to 5 parts by weight of a film former; and (g) 30 to 70 parts by weight of metal particles having a maximum effective diameter of 10 ?m, as determined by laser correlation spectroscopy; wherein the printable composition has a viscosity of at least 1 Pa·s; processes for producing electrically conductive coatings using such compositions and electrically conductive coatings prepared thereby.

Abstract: The present invention deals with a methodology of incorporating carbon nanotubes (CNTs) into an epoxy matrix and thereby producing epoxy-based CNT nanocomposites. Both the pristine and ozonized CNTs are almost homogeneously dispersed into the resin by this approach. Compared with the pristine CNTs (p-MWCNTs), the ozonized ones (f-MWCNTs) offer considerable improvements on mechanical properties within the epoxy resin.

Abstract: The invention relates to semicrystalline polyurethane (PU) compositions which have been filled with carbon nanotubes (CNTs) and have improved electrical properties, and which are obtainable on the basis of water-based polyurethane-CNT mixtures. The invention further relates to a process for producing the polyurethane compositions, in which water-based polyurethane latices are mixed with carbon nanotubes dispersed in water. The invention further relates to films produced by pressurized injection moulding processes or processing of casting solutions.

Abstract: The present invention relates to an improved process of ozonolysis of carbon nanotubes assisted by water vapour. The improved methodology provides an eco-friendly, cheaper, practical and efficient approach to functionalize carbon nanotubes with oxygen-containing moieties for further chemical functionalization and composite dispersion.

Abstract: Printable compositions comprising: (a) 5 to 40 parts by weight of silver nanoparticles having a maximum effective diameter of 150 nm, as determined by laser correlation spectroscopy; (b) 50 to 99.5 parts by weight of water; (c) 0.01 to 15 parts by weight of a dispersing agent; (d) 0.5 to 5 parts by weight of a film former; and (g) 30 to 70 parts by weight of metal particles having a maximum effective diameter of 10 ?m, as determined by laser correlation spectroscopy; wherein the printable composition has a viscosity of at least 1 Pa·s; processes for producing electrically conductive coatings using such compositions and electrically conductive coatings prepared thereby.

Abstract: The present invention relates to a process for the production of non-swellable phyllosilicate tactoids, comprising A) producing a synthetic smectite of the formula I in a high-temperature-melt synthesis [Mn/Valenz]inter[MImMIIo]oct [MIII4]tet X10Y2??(I) B) if the interlayer cation M does not already have a hydration enthalpy from ?6282 to ?406 [kJ/mol], exchanging the interlayer cation M with a cation having a hydration enthalpy from ?6282 to ?406 [kJ/mol] by a cation-exchange method, C) dispersing phyllosilicate in an aqueous system, and D) exchanging M with a cation having a hydration enthalpy from ?405 to 0 [kJ/mol], by a cation-exchange method.

Abstract: Printable compositions comprising: (a) 5 to 40 parts by weight of silver nanoparticles having a maximum effective diameter of 150 nm, as determined by laser correlation spectroscopy; (b) 50 to 99.5 parts by weight of water; (c) 0.01 to 15 parts by weight of a dispersing agent; (d) 0.5 to 5 parts by weight of a film former; and (g) 30 to 70 parts by weight of metal particles having a maximum effective diameter of 10 ?m, as determined by laser correlation spectroscopy; wherein the printable composition has a viscosity of at least 1 Pa·s; processes for producing electrically conductive coatings using such compositions and electrically conductive coatings prepared thereby.

Abstract: Aqueous, printable compositions comprising carbon nanotubes and a polymeric dispersing agent, wherein at least one fifth of the carbon nanotubes have a molecular structure comprising a plurality of stacked and rolled graphene layers; processes for preparing such compositions, methods of use and electrically conductive coatings prepared therewith.

Abstract: Apparatus and method for producing electrically conducting nanostructures by means of electrospinning, the apparatus having at least a substrate holder (1), a spinning capillary (2), connected to a reservoir (3) for a spinning liquid (4) and to an electrical voltage supply (5), an adjustable movement unit (6, 6?) for moving the spinning capillary (2) and/or the substrate holder (1) relative to one another, an optical measuring device (7) for monitoring the spinning procedure at the outlet of the spinning capillary (2), and a computer unit (8) for controlling the drive of the spinning capillary (2) relative to the substrate holder (1) in accordance with the spinning procedure.

Abstract: Method for producing small and micro conductive structures on surfaces by (hot) stamping and/or nanoscale imprinting microstructures on the surfaces, targeting conductive material into the channels thus created with the aid of capillary action, and appropriately after-treating the conductive material.

Abstract: Process for the preparation of nanoscale metal-organic frameworks, and porous frameworks synthesized from at least one metal ion and at least one at least bidentate organic compound and a monodentate growth inhibitor.