The present invention relates to the field of nano-material powder capture and treatment. More specifically, the present invention relates to the apparatus for and method of nano-particle storage, preservation, and treatment.
Nano-technologies normally use materials having sizes in the range of nano-meter. In recent years, researchers and industries have demonstrated promising applications of nano-materials to various fields, including bio-medical, fine chemicals, electronics, and catalysts.
The sizes of the nano-materials make them undetectable by human eyes. In addition, the nano-materials often contain active chemicals or bio-reactive substances that are potentially dangerous to the health of human beings and animals and also harmful to the environment. Especially, when the nano-materials are in the powder forms, the likelihood of dispersing the powders into the air is increased. If no apparatus and methods are used to ensure all the nano-materials that are made are properly accounted for, no one can assure that the spaces that are used for handling the nano-materials are free from nano-materials. Accordingly, apparatus and methods to ensure the nano-material powder accountability are needed to ensure the environmental and biological safety of preparing and handling nano-materials.
Nonetheless, current industries and research labs only use regular lab glassware and Schlenk flasks in the traditional wet chemical experiments for nano-materials preparations. Few, if any, apparatuses and methods have been designed for the purposes of nano-materials preservation and accounting for the powders of the nano-materials. Accordingly, apparatuses and methods ensuring nano-materials particles and powders accountability are needed.
Apparatuses for and methods of nano-material powder preservation, capture, and treatments are disclosed. The applications of the present disclosure ensure powder accountability of the nano-materials by preventing the nano-material from dispersing into the air, thereby preventing the workers and researchers from inhaling the nano-materials and protecting the public from unsafe exposure to the nano-materials.
In one aspect of the present invention, a method of preserving a nano-material is provided. The method comprises receiving a nano-material and mixing the nano-material with a fluid in a vessel until the nano-material is coated/encapsulated by the fluid. In some embodiments, the nano-material is comprised of nano-particles. Alternatively, the nano-material is comprised of nano-tubes, fullerenes, nano-clusters, nanocatalysts, or quantum dots. In some embodiments, the nano-material comprises a biological substance, an enzyme, or a catalyst. In an alternative embodiment, the nano-material comprises titanium carbides. In some embodiments, the method of preserving a nano-material further comprises a step of providing an inert gas. In some embodiments, the vessel is hermetically sealable. In some embodiments, the mixing is performed until the nano-material is substantially evenly distributed in the fluid. In some embodiments, the fluid comprises water and a surfactant. Alternatively, the fluid comprises an organic solvent, an inorganic solvent, or a combination thereof. In some embodiments, the nano-material is substantially evenly distributed in the fluid forming a colloidal fluid. In some embodiments, the step of mixing the nano-material with a fluid comprises a motion of tumbling, shaking, shear mixing, blending, swirling, or sonicating. In some embodiments, the method of preserving a nano-material further comprises a step of sampling using Dynamic Light Scattering (DLS).
In another aspect of the present invention, an apparatus for preserving a nano-material is provided. The apparatus for preserving a nano-material comprises a hermetically sealable vessel; and a nano-material and a fluid contained in the hermetically sealable vessel, wherein the fluid is configured to ensure the nano particles do not agglomerate, coalesce, or adhere to each other in the fluid. In some embodiments, the vessel has a funnel shape bottom. In some embodiments, the nano-material comprises nano-particles, nano-tubes, fullerenes, nano-clusters, nanocatalysts, or quantum dots. Alternatively, the nano-material comprises a biological substance, an enzyme, or a catalyst. In some embodiments, the fluid and the nano-material form a colloidal fluid. In some embodiments, the fluid comprises a surfactant, water, or a combination thereof. Alternatively, the fluid comprises an organic solvent, an inorganic solvent, or a combination thereof. In some embodiments, the hermetically sealable vessel is removably connected with a hermetically sealable receiver. In some embodiments, the hermetically sealable vessel is removably coupled with a fluid source. Alternatively, the hermetically sealable vessel is removably attached to a base. In some embodiments, the hermetically sealable vessel is pivotally rotatable attached to the base, wherein the hermetically sealable vessel is vertically movable from the base. Alternatively, the hermetically sealable vessel is removably coupled with a hermetically sealable mixer, wherein the hermetically sealable mixer is configured to increase the isolation/separation between the particles of the nano-material. In some embodiments, the sealable vessel is removably coupled with a gas inlet, wherein the gas inlet is configured to provide a gas to agitate the fluid, thereby increasing the isolation/separation between particles of the nano-material. Alternatively, the hermetically sealable vessel is removably coupled with a hermetically sealable multi-port switch, thereby forming an integrated sealable apparatus, wherein the hermetically sealable multi-port switch connects any two of the multi-ports. In some embodiments, the hermetically sealable multi-port switch contains three connectable ports, wherein the hermetically sealable multi-port switch connects any two of the three connectable ports, wherein a first connectable port connects to a mixer, wherein a second connectable port connects to a fluid outlet, and wherein a third connectable port connects to a channel configured to re-circulate the fluid in a sealed circle from the hermetically sealable vessel through the mixer and a cooling device back to the hermetically sealable vessel.
In yet another aspect of the present invention, a method of nano-material preservation and dispersion is provided. The method of nano-material preservation and dispersion comprises dispersing powders of a nano-material in a fluid contained in a hermetically sealable vessel until the powder is substantially evenly distributed in the fluid and surrounding the nano material with the fluid, thereby reducing the ability of the nano-material from escaping from the hermetically sealable vessel. In some embodiments, the nano-material comprises a nano-particle. In some embodiments, the fluid comprises water, a surfactant, or a combination thereof.
In another aspect of the present invention, a method of providing particle accountability of a nano-material comprises mixing the powders of the nano-material in a liquid contained in a hermetically sealed vessel until substantially all of the powders become a colloidal suspension in the liquid, and removing the colloid solution from the vessel, thereby making the vessel substantially free from the powders of the nano-material. In some embodiments, the nano-material is received from a hermetically sealable source. In some embodiments, the vessel is removable from the hermetically sealable source, thereby the vessel and hermetically sealable source are able to be concurrently and independently sealed. Alternatively, the vessel is pivotally rotatably secured on a movable base, further wherein the vessel is vertically movable from the base.
In a further aspect, a method of manufacturing nanoparticles comprising dispersing nanoparticles in a solution in an inert gas environment, making the solution into a slurry, and encapsulating the nanoparticles, such that the nanoparticles are prevented from exposing to atmospheric air. In an aspect, a method of nanomaterial treatment comprises producing nanoparticles in a hermetically sealable nanomaterial manufacturing apparatus, transferring the nanoparticles into a hermetically sealable nano-powder collection vessel, hermetically sealing the nanomaterial manufacturing apparatus and the hermetically sealable nano-powder collection vessel, and discoupling the hermetically sealable nano-powder collection vessel with the hermetically sealable nanomaterial manufacturing apparatus, such that the hermeticity of both the hermetically sealable nano-powder collection vessel and hermetically sealable nano-powder collection vessel are able to be maintained. In another aspect, a method of maintaining an inert gas environment for nanomaterial treatment comprises coupling a tubular component between a nanopowder producing device and a nanopowder collector, and purging the tubular component with a gas to eliminate a residual gas in the tubular component. In some embodiments, the gas comprises an inert gas or a reactive gas. In another aspect, a nanomaterial treating vessel comprises a container component, wherein the container component is able to be hermetically sealed and one or more connecting components couple with the container component, such that the vessel is able to receive a nanomaterial from a nanomaterial producing apparatus and is able to process the nanomaterial independently from the nanomaterial producing apparatus.
Embodiments of the present application are directed to devices for and methods of nano-material powder preservation, capture, and treatments. Those of skill in the art will realize that the following detailed description of the devices for and methods of nano-material powder preservation, capture, and treatments are illustrative only and are not intended to be in any way limiting. Other embodiments of the devices, systems, and methods will readily suggest themselves to such skilled persons having the benefit of this disclosure.
Reference will now be made in detail to implementations of the devices for and methods of nano-material powder preservation, capture, and treatments as illustrated in the accompanying drawings. The same reference indicators will be used throughout the drawings and the following detailed description to refer to the same or like parts. In the interest of clarity, not all of the routine features of the implementations described herein are shown and described. It will, of course, be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with application and business related constraints, and that these specific goals will vary from one implementation to another and from one developer to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of engineering for those of skill in the art having the benefit of this disclosure.
Apparatuses for, and methods of, nano-material powder preservation, dispersion, capture, and treatments are disclosed. The applications of the present disclosure ensure powder accountability of the nano-materials preventing the nano-material from dispersing into the air and being lost to collection and treatment. The method of treating a nano-material comprises receiving a nano-material and mixing the nano-material with a fluid in a vessel until the nano-material is sealed by the fluid. The apparatus for treating a nano-material comprises a hermetically sealable vessel containing a nano-material and a fluid, wherein the fluid is configured to increase the isolation between particles of the nano-material.
At step 102, a nano-material is received either in inert gas or in air. The nano-materials include nano-particles, nano-tubes, fullerenes, nano-clusters, nano-catalysts, quantum dots, or any other proper materials in the range of nano-meter-size. Materials that are larger or smaller than the nano-meter-size are also applicable when proper.
At step 104, the received nano-materials are mixed with a liquid in inert gas or in air. The liquid includes water, surfactants, organic solvents, inorganic solvents, solutions that contain biological substance, solutions that contain metals, non-metals, ions, or any combinations thereof. Although the word liquid is used here, present disclosure is also applicable to any substance that has fluid-like movable properties, such as supercritical fluids, gases, aerosol, foam, sol, and gel.
Still referring to step 104, the step of mixing the nano-materials and the liquid can be achieved in many ways. For example, the mixing is able to be achieved by using a mixer to blend, mix, or disturb the liquid that contains the nano-materials until the nano-materials are substantially evenly distributed in the liquid. The mixer can be installed in a main reaction vessel. Alternatively, the mixer can be in a separate unit connected to the main reaction vessel. Further, the mixer can contain various types of mixers including shear mixers, mixers containing blades, vortex mixers, ultrasonic mixer, or any other mixer that can properly mix the liquid and nano-materials to become a homogeneously-like colloid or liquid. In some alternative embodiments, the mixing can be achieved by human labors or mechanical movements, such as manually rotationally tumbling the vessel when mounted in the base 610 (
At step 105, the mixture is sampled for quality of dispersion. At step 106, the mixing of the nano materials and the liquid are continued until the nano-materials are substantially evenly dispersed in the liquid. The well-dispersed nano-materials in the liquid make the liquid a colloid or colloid-like liquid, emulsion, or solution.
The step(s), in part or as a whole, of method 100 can be operated under inert gas environments, such as nitrogen gas, helium, or argon. Alternatively, the step(s) can be performed under air. The inert gases include argon, nitrogen, helium, or any other non-reactive gas. Alternatively, gases containing chemicals that can form protective layer(s) of the nano-materials can be employed, such as chemicals having single or multi-dentate sites and chemicals having chelating and coordinating abilities. Additional pressure, heating, or cooling can also be applied when required. The nano-materials liquid mixture can be sampled and analyzed. In some embodiments, Dynamic Light Scattering (DLS) is employed to analyze the mixture.
An apparatus 300 for treating the nano-materials includes a vessel 302, a receiver 304, and a base 306. The receiver 304 removably attaches to the vessel 302. In some embodiments, the connection between the receiver 304 and the vessel 302 includes valves on both the connector end nearest the receiver 304 and the connector end nearest the vessel 302. When the valves are closed, the vessel 302 and the receiver 304 can be in independent hermetic sealed conditions preventing air from leaking into or the nano-materials getting out of the vessel 302 or receiver 304, which can connect to nano-material preparation chambers. In some embodiments, the receiver 304 is in a funnel-like shape. A narrower end of the receiver 304 is coupled to the vessel 302 to facilitate the transferring of the materials via valves 310, 312, and sliding coupling 308. The wider end of the receiver can attach to other nano-materials reaction chambers or storage places. For example, the receiver can directly attach to a nano-materials preparation chamber 750 (
Still referring to
The vessels 302, 402 are able to be connected with various piping ducts or apparatus. As described above, the vessels 302 and 402 can connect to the receivers 304 and 404. Additionally, vessels 302 and 402 can optionally connect to the gas meters 314 and 414, valves 410 and 403, sliding hermetic coupling 308/408, gas inlets 399/499, sealable port 418, and vacuum components 426. In some embodiments, a window 398 is able to be included. In some embodiments, the adaptor to connect the vessel valve 410 with the reactor valve 412 is able to be a sliding coupling 408. The valve 410 is able to be a valve that hermetically isolates the powder collection vessel from atmosphere when the vessel is disconnected and removed from the powder manufacturing tool, such as a nano-material preparation apparatus 750 (
In some embodiments, the one or more gas inlets 390/490 provide inert gas, such as argon, nitrogen, and helium to provide an inert gas environment to the vessels 302, 402 and purge the system with the inert gas. Alternatively, the gas inlet 390/490 provides positive pressure protective gases, or reactive gases. In some embodiments, the interstitial space between the o-rings 489 in the sliding hermetic coupling 408 is purged with the gas to eliminate any air ingress in the event of a leak across the o-rings. In some embodiments, the gas meters 314 and 414 regulate the flow required and control the gas release rates. In some embodiments, any residual atmosphere can be purged from powder transfer tube 407 by opening valves 497 and flowing the inert gas through tube 407 and out flow measuring device 414. In some embodiments, the vessels 302 and 402 and other components are made durable to endure a negative pressure (e.g., a vacuum), and a vacuum component 426 is able be included. The vacuum components 426 can further contain pressure gauge 428. Further, the port 418 is able to be a fluid return port and externally coupled to the return lines of one or more stirrers (not shown in the figures). The stirrers are able to be used to mix the nano-materials with the liquids discussed above.
A nano-material treating vessel 702 is similar to vessels 302, 402, 502 in
Next, the solutions containing surfactants and/or liquids can be introduced from the liquid tank 755 to the vessel 702 to disperse or preserve the nano-materials. After the liquids are introduced from the liquid tank 755, the valves 742A and 742B can be closed and disconnected from one another. The process of mixing, as mentioned above, can be performed. To ensure that the nano-materials are well dispersed in the liquid, the products are optionally transferred to an independent mixer 720. The mixer can further contain a port 738 for sampling. The sample can be analyzed by any particle distribution analytical instruments, such as DSL or any other proper analytical instruments. If the sample passes required quality standard, the products are transferred to a detatchable/removable ship container 726 for further processing or storage. If the sample does not reach required quality standard, the products are transferred back to the vessel 702 for further processing. The mixer 720 can connect to a multi-way adaptor 734. In some embodiments, the adaptor 734 can connect the channels between the mixer 720 and heat exchanger 728 as shown in 734A, mixer 720 and the outlet 724 as shown in 734B, or outlet 724 and heat exchanger 728 as shown in 734C. When the adaptor 734 connects the channel of the mixer 720 and the heat exchanger 728, the solution containing the nano-materials and the liquid in the vessel 702 can be circulated through the mixer 720, heat exchanger 728, and back to vessel 702. By going through the heat exchanger 728, the heat of the solution generated in the mixing can be removed. The heat exchanged in the heat exchanger 728 is subsequently removed in the chiller 732. When the adaptor 734 connects the channel of the mixer 720 and the outlet 724, the products are outputted and sent to be used or stored. When the adaptor 734 connects the channel of the outlet 724 and the heat exchanger 728, the gas from gas supply, such as gas supply inlet 799, can come to push the remaining products out of the outlet 724. In some embodiments, the adaptor 734 comprises a selector valve, which is able to be switched to drain either the collector/mixer or the heat exchanger into a collection vessel via gravity.
Still referring to
In the following, some examples in accordance with some embodiments of the present invention are provided. In some embodiments, a system comprised of a hermetically sealed powder manufacturing machine removably coupled to a hermetically sealed powder collection vessel. Once the powder has been collected in the vessel, the vessel can be hermetically disconnected and removed from the manufacturing tool while maintaining the hermeticity (hermetic integrity) of both the manufacturing tool and the vessel.
In some embodiments, other hardware is able to be used to replace the above described vessel onto the powder manufacturing tool. Similar methods are able to be used to maintain an inert gas environment. The hardware is able to comprise a container containing a defined atmosphere (inert or reactive). The interface connection can be purged with inert gas to remove/replace residual atmosphere in the connection of the hardware and proactively/dynamically maintain the inertness of the connection.
In some embodiments, a vessel capable of being moved to a remote processing location is provided. Further processing steps (such as solvating, mixing, dispersing, preserving, coating, quality sampling, cooling, dispensing) can be performed inertly within this vessel or outside the vessel with the aid of external, inert connections to supplemental processing hardware. This vessel is able to be not only an inert powder collection vessel but also able to be an inert processing vessel whereby the powder can be further treated without transfer or risk of disturbing the engineered environment inside the vessel.
The following description is presented to enable one skilled in the art to make and use the invention and is provided in the context of a patent application and its requirements. Various modifications to the described embodiments will be readily apparent to those persons skilled in the art and the generic principles herein may be applied to other embodiments. Thus, the present invention is not intended to be limited to the embodiment shown but is to be accorded the widest scope consistent with the principles and features described herein.
A person skilled in the art would appreciate that the nano-materials contain any material in the size of nano-meter. Although the term “nano-material(s)” is used here, the inventors do not intend to limit the applications of the present disclosure to nano-meter size materials. Any materials that have a size larger or smaller than the nano-materials are applicable with the present disclosure. Further, the term nano-materials used in the present disclosure include both particles and powders. These two terms are used equivalently. The present invention may apply to a wide variety of powders and particles. Powders that fall within the scope of the present invention may include, but are not limited to, any of the following: (a) nano-structured powders (nano-powders), having an average grain size less than 250 nanometers and an aspect ratio between one and one million; (b) submicron powders, having an average grain size less than 1 micron and an aspect ratio between one and one million; (c) ultra-fine powders, having an average grain size less than 100 microns and an aspect ratio between one and one million; and (d) fine powders, having an average grain size less than 500 microns and an aspect ratio between one and one million. Further, the terms of solution(s), liquid(s), solvent(s) disclosed in the present disclosure are all interchangeable.
This application claims priority from U.S. Provisional Patent Application Ser. No. 61/284,329, filed Dec. 15, 2009 and entitled “MATERIALS PROCESSING,” which is hereby incorporated herein by reference in its entirety for all purposes.
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Number | Date | Country | |
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61284329 | Dec 2009 | US |