1. Field of the Invention
The present invention relates to the construction of composite panels, and more particularly to modularly constructed composite panels enhanced with nanomaterials.
2. Background Art
A need exists for lightweight durable materials. Such durable materials may be needed for various reasons, such as a need to provide resistance to mechanical, thermal, chemical, and/or other environmental phenomena, and/or to address further requirements for durability. A wide variety of applications may benefit from materials that have such durability. Examples of such applications include vehicles, shipping and storage containers, aircraft skins, clothing (e.g., armor worn by security, law enforcement, military, and/or other personnel), structural applications, and further applications.
Applications that require movement of materials would benefit from materials having a decreased weight. For instance, items such as vehicles (e.g., delivery trucks, trains, etc.), shipping and storage containers, protective doors, and wind turbine blades require the expenditure of energy for the purpose of movement, and therefore would benefit from lighter weight materials.
Thus, what is desired are materials that are lightweight and durable, and that may be used in a variety of applications.
Methods, systems, and apparatuses for panels of material are described. The panels are modularly formed. For example, a panel may be modularly formed by combining multiple layers of one or more materials. A layer of a panel may be formed completely of a single material (i.e., a homogeneous layer), such as a polymer material. Alternatively, a layer may be formed of a first material combined with one or more further materials (e.g., a heterogeneous layer). Furthermore, the material of a layer may be enhanced with one or more nanomaterials.
Modular panels are described herein. In an example implementation, a modular polymer panel includes a plurality of layers attached together in a stack. At least one of the layers includes a polymer, and at least one of the layers includes a nanomaterial.
Method for forming modular panels are provided. A plurality of layers is formed. At least one layer of the plurality of layers is formed to include a nanomaterial. At least one layer of the plurality of layers is formed to include a polymer. The plurality of layers is arranged in a stack. The layers are attached together in the stack to form the panel.
Layers of the panel may be formed in various ways. For instance, a layer may be formed as a planar layer of the polymer. A layer may include a ribbon formed from the polymer. A plurality of ribbons may be woven together to form a layer. A plurality of fibers of the polymer may be woven together to form a layer. A plurality of yarn structures may be formed from a plurality of fibers of the polymer, and the yarn structures may be woven together to form a layer of the plurality of layers. A layer may be formed from a plurality of solid and/or hollow rods.
In another example, a first polymer material may be inserted into a mold. A catalyst material may be added to the first polymer material to cause a foam material to be produced that conforms to the shape of the mold. The foam material may be cured to generate a layer of the plurality of layers.
Furthermore, one or more rods or a woven material may be included in the mold. The foam material may be enabled to substantially surround the one or more rods or the woven material that are include in the mold. A layer is thereby generated that includes the cured foam material and the one or more rods or the woven material.
The layers in the stack may be attached together in various ways, including by a thermoforming technique, a compression molding process, generating and curing a foam material between a pair of adjacent layers in the stack, by positioning and heating thin sheets of thermoplastic adhesive between layers in the stack, and/or according to further adhesive materials and/or attachment techniques.
These and other objects, advantages and features will become readily apparent in view of the following detailed description of the invention. Note that the Summary and Abstract sections may set forth one or more, but not all exemplary embodiments of the present invention as contemplated by the inventor(s).
The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the present invention and, together with the description, further serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the invention.
The present invention will now be described with reference to the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Additionally, the left-most digit(s) of a reference number identifies the drawing in which the reference number first appears.
The present specification discloses one or more embodiments that incorporate the features of the invention. The disclosed embodiment(s) merely exemplify the invention. The scope of the invention is not limited to the disclosed embodiment(s). The invention is defined by the claims appended hereto.
References in the specification to “one embodiment,” “an embodiment,” “an example embodiment,” etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Furthermore, it should be understood that spatial descriptions (e.g., “above,” “below,” “up,” “left,” “right,” “down,” “top,” “bottom,” “vertical,” “horizontal,” etc.) used herein are for purposes of illustration only, and that practical implementations of the structures described herein can be spatially arranged in any orientation or manner.
The example embodiments described herein are provided for illustrative purposes, and are not limiting. Further structural and operational embodiments, including modifications/alterations, will become apparent to persons skilled in the relevant art(s) from the teachings herein.
Methods and systems for panels of material are described. In embodiments, a panel may be assembled that is lightweight, while being stiff or flexible (as desired for a particular application), strong, and tough. The panel may be modularly formed. In embodiments, a panel is modularly formed by combining multiple layers of one or more materials. In an embodiment, a layer of a panel may be formed completely of a single material (i.e., a homogeneous layer), such as a polymer material. For example, a layer may be formed of a thermoplastic or thermosetting plastic material. In another embodiment, the layer is formed of a first material (e.g., a polymer material) combined with one or more further materials (e.g., to form a heterogeneous layer).
Examples of such further materials are micro-scale and/or nano-scale technologies, component, and/or materials. As used herein, a nanoscale material or “nanomaterial” is a structure having at least one region or characteristic dimension with a dimension of less than 1000 nm. Examples of nanomaterials, including NEMS (nanoelectromechanical systems) devices and NST (nanosystems technology) devices, are described throughout this document. As used herein, a microscale material or device is a structure having at least one region or characteristic dimension with a dimension in the range of 1 micrometer (μm) to 1000 μm. Examples of microscale materials and devices, including MEMS (microelectromechanical systems) devices and MST (microsystems technology) devices, are described throughout this document.
For instance, in an embodiment, the material of a layer may be enhanced with one or more nanomaterials. The nanomaterials can vary in size, concentration, orientation, make-up (type), and/or mixture, as desired for a particular application. For example, nanomaterials such as nanowires, nanotubes, nanorods, nanoparticles (e.g., nanocrystals), etc., may be used to enhance the material of a layer, such as to strengthen the material, to harden the material, or to otherwise modify properties of the layer. Any type of nanotube may be used, including single-walled nanotubes and multi-walled nanotubes. Example types of nanoparticles include organic nanoparticles, such as fullerenes (e.g., buckyballs), graphite, other carbon nanoparticles, nano-platelets, and inorganic nanoparticles, such as particles formed by titanium (Ti), titanium oxide (TiO), or nano-clay. Further types of nanomaterials not mentioned herein may also be used, as would be known to persons skilled in the relevant art(s).
The introduction of nanomaterials into panel embodiments can provide numerous benefits. Many nanomaterials have beneficial properties, including strength, stiffness, and hardness. Carbon nanotubes are one of the strongest and stiffest materials known in terms of tensile strength and elastic modulus. A single-wall carbon nanotube is a sheet of graphite (graphene) that is one atom thick, and is rolled in a cylinder with diameter of the order of a nanometer. A carbon nanotube may have a length-to-diameter ratio that exceeds 10,000. Multi-walled carbon nanotubes have been tested to have a tensile strength in the order of 63 GPa, which is much greater than that for high-carbon steel, having a tensile strength of approximately 1.2 GPa. Because carbon nanotubes have a low density for a solid (1.3-1.4 g/cm3), the specific strength of carbon nanotubes (e.g., 48,462 kN·m/kg) is extremely high, compared to that for high-carbon steel (e.g., 154 kN·m/kg). Furthermore, polymerized single walled nanotubes are comparable to diamond in terms of hardness, but are less brittle. Thus, in applications requiring durable materials such as ballistic armor, incorporating nanomaterials in layers of panels can provide benefits in strength, stiffness, and hardness, among other benefits. The concentration and types of nanomaterials formed in a layer can be selected as desired for a particular application.
In an embodiment, a layer may be formed as a planar sheet of a material. In another embodiment, a layer may be formed from, or may include fibers, woven fibers and/or ribbons of material. In an embodiment, a layer may be a “foam” layer or may include a foam-based material. For example, a foam layer may be formed by applying a suitable material (e.g., a liquid or gel such as a polyurethane) between two solid layers of material (e.g., a polymer material), or into a mold, and causing the material to foam and harden/cure. For example, the material may be a combination of two or more materials that cure when mixed together. The material of the foam layer may have further materials (e.g., nanomaterials, fibers, ribbons, woven fibers, woven ribbons, etc.) dispersed within the foam layer prior to hardening, to provide the benefits of the further materials to the foam layer.
The panels may be modularly configured in any way, by combining layers, as desirable for a particular application. For example, layers may be stacked to form a panel. In another example, a panel may be formed by weaving together sub-layers. In still another example, one or more woven and/or one or more non-woven layers may be stacked to form a panel. The layers that form the panels may be rigid or flexible. When the layers are flexible, the formed panels may also be flexible. Such flexibility may be desirable for damping a velocity of received projectiles in ballistic armor or similar applications. Likewise, panels formed to be stiffer may be desirable for providing structural integrity to panels in a variety of applications. Any number of layers (and type) can be stacked in a panel to provide a desired level of durability, resistance to projectiles, hardness, etc.
Panels can be formed to be flat, curved, contoured (e.g., to match a desired surface), or otherwise formed in any geometric shape. For instance, in an embodiment, the layers of the panel may be shaped prior to being attached together to form the panel. In another embodiment, the panel may be shaped during the process of attaching the layers together. For instance, the layers may be placed in a mold in a manner that the layers conform to a predetermined shape of the mold, and an adhesive material between the layers may be cured/dried to attach the layers together in the predetermined shape. For example, a panel may be formed by a plurality of layers joined together during a monolithic process, where a foam material is formed between layers to join them together. Such a process may be used to form a panel prior to shaping of the panel, or may be performed in a mold chamber so that the panel is formed in the shape predetermined by the mold chamber. In another embodiment, the panel may be shaped after the layers are attached together to form the panel. For instance, a formed panel may be bent into a desired shape, may be cut into multiple pieces that may be reassembled (e.g., using any of nails, screws, bolts, an adhesive material, etc.) into a desired shape or structure (e.g., a container, body armor, etc.), etc.
Panels formed according to embodiments of the present invention have many applications. For example, panels may be incorporated in clothing, or may be formed to perform as clothing (e.g., shirts, pants, etc.), including outerwear (e.g., coats, jackets, etc.). Having one or more panels incorporated in or as clothing enables greater clothing durability. For example, in an embodiment, panels may be worn as ballistic armor by personnel in military and law enforcement applications. For example, the panels may be incorporated in bullet-proof vests, and/or other types of body armor. Panels can also be incorporated into armor used to protect objects, such as vehicles, dwellings, enclosures, etc.
Example embodiments for layer materials, layers, panels, and processes and systems for assembling the same, are described in the following subsections.
Example Layers and Layer Material Embodiments
Example embodiments for layers and for layer materials are described in this section. Such example embodiments are provided for purposes of illustrations, and are not intended to be limiting. Further structural and operational embodiments, including modifications/alterations, will become apparent to persons skilled in the relevant art(s) from the teachings herein.
A variety of forms of material may be woven to form a layer of a panel. For example,
Multiple fibers 100 may be combined to form a woven fiber or “yarn.” For example,
Ribbon 300 may be made of a variety of materials. For example, ribbon 300 may be a polymer, such as polyurethane, polyester, acrylic, phenolic, epoxy, an elastomer, polyolefins, polypropylene, polyethylene, vinyl ester, etc. In an embodiment, ribbon 300 may be a homogeneous material. In another embodiment, ribbon 300 may include a first material (e.g., a polymer) that has one or more further materials therein, such as one or more nanomaterials. For example,
Planar layer 600 may be made of a variety of materials, such as a thin film, monolithic material. For example, planar layer 600 may be a polymer, such as polyurethane, polyester, acrylic, phenolic, epoxy, an elastomer, polyolefins, polypropylene, polyethylene, vinyl ester, etc. In an embodiment, planar layer 600 may be a homogeneous material (e.g., a polyurethane thin film). In another embodiment, planar layer 600 may include a first material (e.g., a polymer) that has one or more further materials therein, such as one or more nanomaterials. For example,
Various material configurations described above can be combined to form layers. For example, non-monolithic/non-homogeneous layers may be formed. Fibers, groups of fibers (e.g., yarn), and/or ribbons may be woven together to form layers. For example,
Fibers 902, or other materials used to create a woven layer (e.g., yarns, ribbons), may be any type described herein, including homogeneous fibers/yarn/ribbon and/or heterogeneous fibers/yarn/ribbon. Thus, in an embodiment, all fibers 902 of woven layer 900 may be the same. Alternatively, different types of fibers/yarn/ribbons may be present in woven layer 900, including fibers/yarn/ribbons that include and do not include nanomaterials. For example,
In an alternative embodiment, layers may include fibers or rods arranged in a single substantially uniform direction (e.g., being parallel/unidirectional). The fibers/rods may alternatively be oriented in a plurality of directions to accommodate loadings to panel 100 from multiple directions. The fibers may be individual fibers or woven fibers. In embodiments, the rods may be solid or hollow. Example embodiments for layers that include rods are described in further detail below. In a still further embodiment, layers may include fibers and/or rods having random orientations.
In embodiments, one or more layers of a panel may include rods that provide structural reinforcement to the panel.
Rods 1308 can be made of any suitable material, including any polymer mentioned elsewhere herein or otherwise known, a metal (e.g., aluminum, titanium, etc.) or combination of metals/alloy (e.g., steel), a ceramic material, a composite material, fiberglass infused polyester tubes, etc. Rods 1308 can be made of layer materials described elsewhere herein, including having fibers, weaves, nanomaterials, and/or functional elements included therein. In the example of
Rods 1308 can be solid (e.g., as shown in
A panel that includes rods 1308 may be manufactured in a variety of ways. For instance, as shown in
In another embodiment, recesses 1310 and 1312 may not be pre-formed in first and second layers 1302 and 1304. To form layer 1300, rods 1308 may be positioned between layers 1302 and 1304, and layers 1302 and 1304 may be moved into contact with each other. By compressing layers 1302 and 1304 together, rods 1308 may form recesses 1310 and 1312 in layers 1302 and 1304, respectively.
In another embodiment, layers 1302 and 1304 may instead be formed as a single layer in which rods 1308 are positioned.
Referring back to
First and second adhesive layers 1606 and 1608 bond together first, second, and third layers 1302, 1304, and 1306. First adhesive layer 1606 may be applied to the second surface of first layer 1302, and second adhesive layer 1608 may be applied to the second surface of second layer 1304. First and second adhesive layers 1606 may each be any type of adhesive material described elsewhere herein, including a resin, a foam layer, a glue, an epoxy, etc., and may optionally include micro- and/or nanomaterials. First and second coating layers 1602 and 1604 may be applied to first and second layers 1302 and 1304, respectively, in any manner described herein, including by laminating, molding, spraying, rolling on, etc. When first and second layers 1302 and 1304 are moved into contact with each other (e.g., by a compression mechanism), first and second adhesive layers 1606 and 1608 come into contact with each other and bond together first, second, and third layers 1302, 1304, and 1306. Furthermore, first and second adhesive layers 1606 and 1608 may combine to form a single layer in layer 1600.
Rods 1308 provide additional strength to layers 1300, 1500, and 1600, including strength in tension, compression, and/or torsion with respect to layers 1300, 1500, and 1600. Rods 1308 may be textured (e.g., provided with grooves, ridges, etc.) to enhance adhesion with layers 1302, 1304, and/or 1502. Layers 1300, 1500, and 1600, may be combined in any manner to form larger layers/panels. For example,
As shown in
Note that in embodiments, layers 1302 in first layer 1702 may be aligned in any manner relative to layers 1304 in second layer 1704. For example, as shown in
Example Panel Embodiments
As described above, multiple layers, such as those described above, may be modularly combined to form composite panels, according to embodiments of the present invention. For example, layers may be stacked to form a panel. Layers of any type may be stacked in any order to form panels. For example, one or more homogeneous layers may be stacked with one or more heterogeneous layers. Furthermore, one or more woven layers may be stacked with one or more non-woven layers. One or more rod layers may be stacked with one or more non-rod layers. The distribution of homogeneous and/or heterogeneous layers in a panel may be selected based on the characteristics desired for the particular panel application.
For instance,
As shown in
First, fifth, and ninth layers 600a-600c are homogeneous planar layers similar to planar layer 600 shown in
Sixth layer 1500 is a rod layer as also shown in
The example number of layers and types of layers shown in
Layers 600a-600c, 900a-900e, and 1500 may be attached to each other in panel 1900 in a variety of ways. For example, an adhesive material, such as a glue, a resin, a foam material, a thin film adhesive, etc., may be applied to surfaces of layers to attach adjacent layers together. The adhesive material may be applied in any form, including as a gel, liquid, or solid, an in any manner, including by pouring, flowing, spraying, rolling on, etc. In another example, pressure thermoforming techniques, such as autoclave or a compression molding process, may be used to compress/heat layers into panel 1900. In one example, thin sheets of thermoplastic adhesive may be interspersed between layers of a stack. The thin sheets of thermoplastic adhesive themselves may be homogeneous materials or heterogeneous materials (e.g., have one or more nanomaterials included therein). The stack is heated, thereby activating the thermoplastic adhesive to adhere the layers of the stack together. In another embodiment, a foam layer, as described above, may be formed between two other layers. The foam layer may operate as an adhesive material to attach together the two layers (in addition to providing any further features that may be provided by the foam layer).
Note that in a further embodiment, panel 1900 may include one or more layers of further materials. For example, panel 1900 may include one or more layers of fabric made from another synthetic fiber such as Kevlar, additional types of nanoparticles, etc., that are interspersed throughout panel 1900. In another embodiment, panel 1900 may include one or more layers of recyclable materials. For example, the properties of an extruded polypropylene (or other material) ribbon may be enhanced by recycling and then re-extruding the polypropylene into ribbon form a second time or even further times.
Each layer may be selected/tuned to a degree of precision based on the requirements of a particular application, such as impact resistance, stiffness, melt-point, flammability, chemical resistance, electrical conductivity, aerial density, sensing abilities, and/or other requirements. Such tuning can be performed in a number of ways. For example, tuning can be performed by selecting the material for the layer, selecting dimensions of the layer (e.g., thickness, length, width), selecting whether the layer is woven or non-woven, if the layer is woven, selecting whether fibers, matte, yarn, and/or ribbon is woven to form the layer, selecting whether to add nanomaterials to the layer, selecting the type of and concentration of nanomaterials added to the layer (if added), and/or by performing other selection criteria described elsewhere herein or otherwise known. For example, one or more layers of a panel may be made electrically conductive by incorporating nanomaterials (e.g., metallic or non-metallic) into the one or more layers.
In an embodiment, a panel may be manufactured to be any weight, including lightweight, medium weight, or heavyweight, depending on factors such as materials used in layers of the panel, thicknesses of the layers, a number of layers, etc. A panel may be manufactured of any thickness, including thick, medium thickness, and/or thin. For example, in one embodiment, a panel can be 0.5 pounds per square foot at ¼″ thick. In an embodiment, a panel may be stiff or flexible.
Embodiments enable a modularly-constructed panel/system, constructed from modular/interchangeable components. A panel may be considered to be a system of building blocks, fully integrated to create a self-contained system. Panels may be modularly combined as building blocks to create a variety of form factors. Furthermore, panels may be manufactured that are fully integrated and self-contained. In embodiments, a panel may be coated with one or more of a variety of types of coatings such as polymers, paints, ceramics, metals, etc. For example, in an embodiment, a coating may be a skin gel coat, which may be clear or opaque, and may be applied in any manner, such as by spraying, painting, depositing, etc.
Example Assembly Embodiments for Panels
Panels may be assembled in a variety of ways, according to embodiments. For instance,
Flowchart 2100 begins with step 2102. In step 2102, a plurality of layers is formed. For instance, referring to
Layer fabricator 2202 may be configured to form any type of layer described herein. For example, layer fabricator 2202 may be configured to receive or to form fibers (e.g., fiber 100 of
In an embodiment, step 2102 of flowchart 2100 may include step 2302 shown in
In an embodiment where nanomaterial 2208 is received by layer fabricator 2202, nanomaterial 2208 may be incorporated into a material of layer material 2212 by layer fabricator 2202 in any manner described elsewhere herein or otherwise known. For example, in an embodiment, nanomaterial 2208 may be added to a foam material to be incorporated into a layer.
For instance,
As shown in
Note that the example of
In step 2104, the plurality of layers is attached together in a stack to form the panel. For instance, referring to
Note that in embodiments, a formed panel (e.g., layer 1300 of
In step 2106, the panel is optionally further processed. For instance, referring to
As shown in
In step 2108, the panel is applied to an application. In embodiments, panel 2220 generated by system 2200 may be configured, delivered, and/or applied to be used in any suitable application described elsewhere herein or otherwise known to persons skilled in the relevant art(s) from the teachings herein.
Example Panel Applications
The layer embodiments of
For example, the one or more protective layers may be made from a harder and/or more durable material (e.g., a dense polymer, a metal, etc.) and/or may incorporate nanomaterials and/or other particles (e.g., metal particles) that increase a durability and/or hardness of the one or more layers. The one or more protective layers may provide protection against weather (e.g., rain, sleet, snow, extreme cold, extreme heat), against impacts (e.g., from vehicles, from projectiles such as bullets, etc.), against explosions, and/or against further external threats and/or internal threats or sources of damage. For example, a panel may form a container, or may be formed around the outer surface of a container, that is configured to contain an explosive material. The panel may be configured to damp the explosive force of the container if the explosive material inside the container explodes.
In an embodiment, a panel may be incorporated into a structure such as an automobile, a truck such as a delivery truck, a shipping container, an aircraft skin, wearable armor or accessories (including camouflaged armor), wind turbine blades, doors, walls, floors, roofs, and into further structures, including enclosures. Such structures may be newly built with panels embodiments, and/or existing structures may be retrofitted with panel embodiments. In an embodiment, a panel may be attached to a structure. For example, one or more panels may be attached (e.g., by an adhesive mechanism, such as an adhesive material, one or more nails, screws, bolts, etc.) to an outer surface of an automobile, truck, shipping container, aircraft, wearable armor, door, wall, floor, roof, or wind turbine blade. Alternatively, a panel may form a portion of the structure. For example, a panel of the present invention may replace a panel of an outer structure of an automobile, truck, shipping container, aircraft, wearable armor, door, wall, floor, roof, or wind turbine blade. Panels may be flat, curved, contoured, or have any other geometric shape or contour.
Panels formed according to embodiments of the present invention have many applications. For example, panels may be used in applications of homeland security, environmental monitoring, defense, displays, recreational vehicles, inventory management, shipping, infrastructure, construction, transportation, energy generation, storage, distribution, and weather monitoring.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
This application claims the benefit of U.S. Provisional Application No. 60/955,453, filed on Aug. 13, 2007, which is incorporated by reference herein in its entirety. The following applications of common assignee are related to the present application, were filed on the same date as the present application, and are herein incorporated by reference in their entireties: U.S. application Ser. No. ______, titled “Nano-Enhanced Smart Panel,” and U.S. application Ser. No. ______, titled “Nano-Enhanced Modularly Constructed Container.”
Number | Date | Country | |
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60955453 | Aug 2007 | US |