Patent DE-102011110048-A1 (DE)
Title: Coating support materials to produce composite, by unwinding support material from supply reel, thermally processing the material, cleaning surface of material and coating surface of material with nanoparticles reactive for matrix polymer
Inventor: STURM HEINZ DR
IPC: C23C14/56
Filed: 2011-08-08
Abstract: The method comprises unwinding a support material (4) of a composite from a supply reel that is wound with the support material in a first chamber, guiding the unwound material in a second chamber, preparing the support material by thermal process and/or electric discharge process in a desizing system of the second chamber, cleaning a surface of the support material, locally coating the support material on its singular locally desized, cleaned surface with nanoparticles chemically reactive for a matrix polymer of the composite in a vacuum chamber (13), and post-treating the coated material. The method comprises unwinding a support material (4) of a composite from a supply reel that is wound with the support material in a first chamber, guiding the unwound material in a second chamber, preparing the support material by thermal processes and/or electric discharge processes in a desizing system of the second chamber, cleaning a surface of the support material, locally coating the support material on its singular locally desized, cleaned surface with nanoparticles chemically reactive for a matrix polymer of the composite in a vacuum chamber (13), post-treating the coated material in a third chamber by a thermal process or an electrically discharge process in a treatment device to determine bond liability of the nanoparticles on the surface of the coated support material, and winding the coated and post-treated support material to a take-up reel in a fourth chamber. The coating is carried out by a coating device (20) and a source of nanoparticles. The coating device generates a directed jet of nanoparticles, which impinges in a beam guiding device (22) adapted to the support material that is guided past transversely at the beam. The generation of the directional beam takes place by an entrainment of the chemically reactive nanoparticles in a gas stream or by electrical or magnetic fields. The surface of the support material comprises the nanoparticles of defined size, elemental composition and size distribution, and is coated with the allocation prescribed density of nanoparticles. The coating of the support material in the vacuum chamber begins with an introduction of the purified support material and expires with the discharge of the nanoparticle coated substrate. The pretreatment step is carried out outside of the vacuum chamber to achieve purified substrate and predetermined packing density of the adherent nanoparticles on the support material or in the vacuum chamber equipped with chamber system comprising locks. The step of cleaning the support material comprises removing an initially present coating on the surface of the support material using an epoxy resin. The preparation of the support material by thermal processes comprises cleaning the support material by direct or indirect heating, and the preparation of the unpurified support material by electrical discharge processes comprises cleaning the support material by plasma produced in a plasma device of the second chamber, where the second chamber comprises a discharge device for receiving the detached particles of the coating. The chemically reactive nanoparticles: have a dimension of less than 100 nm; and comprise metal particles and/or inorganic nanoparticle metal oxides and copper nanoparticles. The support materials are fibrous materials such as carbon fibers (11), glass fibers or bundles, rollable thin sheets or rollable sheets. The nanoparticles are synthesized by physical vapor deposition (PVD), chemical vapor deposition or plasma enhanced chemical vapor deposition. The coating device performs local island layer growth of coating on the surface of the support material by PVD. An independent claim is included for a device for coating support materials introducible into composites with nanoparticles.