摘要:
A heat transport structure is provided having a structural microtruss wick with a thermal transport medium associated with the microtruss wick for thermal energy transport by fluid and vapor transport between a heat source and a heat sink.
摘要:
Variations of this invention provide durable, impact-resistant structural coatings that have both dewetting and anti-icing properties. The coatings in some embodiments possess a self-similar structure that combines a low-cost matrix with two feature sizes that are tuned to affect the wetting of water and freezing of water on the surface. Dewetting and anti-icing performance is simultaneously achieved in a structural coating comprising multiple layers, wherein each layer includes (a) a continuous matrix; (b) discrete templates dispersed that promote surface roughness to inhibit wetting of water; and (c) nanoparticles that inhibit heterogeneous nucleation of water. These structural coatings utilize low-cost, lightweight, and environmentally benign materials that can be rapidly sprayed over large areas using convenient coating processes. The presence of multiple layers means that if the surface is damaged during use, freshly exposed surface will expose a coating identical to that which was removed, for extended lifetime.
摘要:
The present invention provides a battery electrode comprising an active battery material enclosed in the pores of a conductive nanoporous scaffold. The pores in the scaffold constrain the dimensions for the active battery material and inhibit sintering, which results in better cycling stability, longer battery lifetime, and greater power through less agglomeration. Additionally, the scaffold forms electrically conducting pathways to the active battery nanoparticles that are dispersed. In some variations, a battery electrode of the invention includes an electrically conductive scaffold material with pores having at least one length dimension selected from about 0.5 nm to about 100 nm, and an oxide material contained within the pores, wherein the oxide material is electrochemically active.
摘要:
A composite truss armor and a method of manufacturing the same. The composite truss armor includes a filler material and a three-dimensional (3D) ordered truss structure. The 3D ordered truss structure includes: a plurality of first truss elements defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss elements defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss elements defined by a plurality of third self-propagating polymer waveguides and extending along a third direction. The first, second, and third ordered truss elements interpenetrate each other at a plurality of nodes to form a continuous material. The first, second, and third truss elements define an open space. The filler material occupies at least a portion of the open space, and the 3D ordered truss structure is self-supporting.
摘要:
A composite structure for storing thermal energy. In one embodiment, an apparatus for storing thermal energy includes: a thermal storage material and a three-dimensional structure. The three-dimensional structure includes: a plurality of first truss elements defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss elements defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss elements defined by a plurality of third self-propagating polymer waveguides and extending along a third direction. The first, second, and third truss elements interpenetrate each other at a plurality of nodes to form a continuous material. The first, second, and third truss elements define an open space. The thermal storage material occupies at least a portion of the open space, and the three-dimensional structure is self-supporting.
摘要:
Flexible thermal control coatings for use on components of spacecraft and methods for fabricating such coatings are provided. In an exemplary embodiment, a flexible thermal control coating comprises a flexible organic binder for disposition on the component and an inorganic material having a radiation absorptance (α) of less than about 0.2 and an emissivity (ε) of at least about 0.6. The inorganic material and the organic binder are oriented relative to each other so that an exterior surface of the coating has a higher concentration of inorganic material than an interior surface of the coating and a lower concentration of organic binder than the interior surface.
摘要:
A composite structure for storing thermal energy. In one embodiment, an apparatus for storing thermal energy includes: a thermal storage material and a three-dimensional structure. The three-dimensional structure includes: a plurality of first truss elements defined by a plurality of first self-propagating polymer waveguides and extending along a first direction; a plurality of second truss elements defined by a plurality of second self-propagating polymer waveguides and extending along a second direction; and a plurality of third truss elements defined by a plurality of third self-propagating polymer waveguides and extending along a third direction. The first, second, and third truss elements interpenetrate each other at a plurality of nodes to form a continuous material. The first, second, and third truss elements define an open space. The thermal storage material occupies at least a portion of the open space, and the three-dimensional structure is self-supporting.
摘要:
The disclosure provides for a self decontaminating coating and method. The coating comprises a polyurethane component having a solids content in the range of about 10 weight percent to about 100 weight percent and having at least one volume percent free space, a chemical active, and a biological active. In another disclosed embodiment, a method of reducing the transportation of chemical contaminants and biological contaminants is provided comprising the steps of providing a self decontaminating coating comprising a polyurethane component having a polyurethane component having a solids content in the range of about 10 weight percent to about 100 weight percent and having at least one volume percent free space, a chemical active, and a biological active, and applying the coating to a surface of an aircraft, rotorcraft, vehicle, item of equipment, or architectural structure.
摘要:
Flexible thermal control coatings for use on components of spacecraft and methods for fabricating such coatings are provided. In an exemplary embodiment, a flexible thermal control coating comprises a flexible organic binder for disposition on the component and an inorganic material having a radiation absorptance (α) of less than about 0.2 and an emissivity (ε) of at least about 0.6. The inorganic material and the organic binder are oriented relative to each other so that an exterior surface of the coating has a higher concentration of inorganic material than an interior surface of the coating and a lower concentration of organic binder than the interior surface.
摘要:
A method of forming a three-dimensional (3D) composite structure includes: securing a mask between a collimated light source and a volume of a photo-monomer; directing a collimated light beam from the collimated light source to the mask for a period of exposure time such that a portion of the collimated light beam passes through the mask and is guided by a plurality of apertures into the photo-monomer to form a plurality of waveguides through a portion of the volume of the photo-monomer; removing any uncured photo-monomer to leave behind a three-dimensional ordered open-cellular microstructure to define an open volume and a structure of a first continuous material of the three-dimensional composite material; and placing a second continuous material in the open volume, wherein the second continuous material and the first continuous material share an interface between each other, and wherein the interface is everywhere continuous.