摘要:
The present invention is directed to a method for making a conformal antenna on a surface by providing a composition comprising a polymer matrix and a plurality of metalized tubules and applying the composition to the surface as two parallel wires connected at their ends to make a closed loop with one of the parallel wires broken in the middle. Also disclosed is an alternate method for making a conformal antenna on a surface by spraying a first material comprising a polymer matrix onto the surface and simultaneously spraying a second material comprising a plurality of metalized tubules and a coagulant onto the surface, wherein the first and second materials mix together during the spraying. A further method for making a conformal antenna includes spraying a first material comprising a polymer matrix and a plurality of metalized tubules onto the surface and simultaneously spraying a second material comprising an aqueous electroless plating bath onto the surface, wherein the first and second materials mix together during the spraying.
摘要:
The present invention is directed to a method for making a conformal antenna on a surface by providing a composition comprising a polymer matrix and a plurality of metalized tubules and applying the composition to the surface as two parallel wires connected at their ends to make a closed loop with one of the parallel wires broken in the middle. Also disclosed is an alternate method for making a conformal antenna on a surface by spraying a first material comprising a polymer matrix onto the surface and simultaneously spraying a second material comprising a plurality of metalized tubules and a coagulant onto the surface, wherein the first and second materials mix together during the spraying. A further method for making a conformal antenna includes spraying a first material comprising a polymer matrix and a plurality of metalized tubules onto the surface and simultaneously spraying a second material comprising an aqueous electroless plating bath onto the surface, wherein the first and second materials mix together during the spraying.
摘要:
This invention pertains to a product and a method for preparing same. The product is an electrically conducting metallized fibers and a non-conducting composite containing the metallized fibers. In a preferred embodiment, the product is a composite of metallized cellulose fibers disposed in an electrically non-conducting matrix. The method includes the steps of hydrating cellulose fibers to prevent absorption of chemical reagents; activating the cellulose surface of the fibers for metal deposition; removing from the fibers excess activator and reagents used in the activation; drying the fibers to a free-flowing condition whereby the fibers acquire the color of the activator by virtue of its deposition on the fibers; metallizing the fibers to deposit thereon a metal capable of absorbing electromagnetic radiation; drying the metallized fibers whereby they are free-flowing; and forming a composite composed of an electrically non-conductive matrix having dispersed therein the matallized fibers.
摘要:
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
摘要:
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
摘要:
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
摘要:
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
摘要:
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
摘要:
A coating composite is provided for a platform surface of an antenna array for, when applied to the platform, affording isolation of radiating and receiving antennas of the array. The coating composite includes a plurality of conductively coated elongate tubes dispersed in an insulating polymer matrix at a volume loading density approaching that at which the composite begins to conduct electrically over macroscopic distances, i.e., close to the percolation threshold. The tubes are preferably comprised of microtubules comprised of biologically-derived, high-aspect rod-shaped particles of microscopic dimensions having an electroless plated metal coating thereon.
摘要:
Described herein is an approach using inexpensive, disposable chemical sensor probes that can be mounted on a small unmanned aerial vehicles (UAVs) and used to analyze a site (such as one known or suspected to contain explosive residue, spilled material or contaminated soil) without the need for a person to conduct ground operations at the site. The method involves contacting a soil or a surface with a filter paper wetted with a solvent, then subjecting the filter paper to voltammetry and/or spectroscopy, thus detecting a possible variation indicative of one or more analytes, wherein the solvent is selected from the group consisting of polar aprotic or protic solvents having a boiling point of at least 100° C., room temperature ionic liquids, and deep eutectic solvents.