Oleophilic and hydrophobic nanocellulose materials
Inactive Publication Date: 2015-12-24
API INTELLECTUAL PROPERTY HOLDINGS LLC
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Benefits of technology
The patent text describes a process where a lignin-containing liquor is used to modify nanocellulose material. The process can involve flashing, distilling, or stripping the liquor to enhance the deposition of lignin onto the nanocellulose. The technical effect of this process is the improved and efficient modification of nanocellulose with lignin, which can lead to improved performance and utilization of the material.
Problems solved by technology
Its moisture sensitivity, its incompatibility with oleophilic polymers, and the high energy consumption needed to produce, for example, NFC have so far prevented it from competing with other mass products such as ordinary paper or plastic.
Although the process may be simple, disadvantages include high energy consumption, damage to fibers and particles due to intense mechanical treatment, and a broad distribution in fibril diameter and length.
Such a technique reduces energy consumption compared to mechanical treatment and can produce more uniform particle sizes, but the process is not regarded as economically viable.
Method used
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[0045]This description will enable one skilled in the art to make and use the invention, and it describes several embodiments, adaptations, variations, alternatives, and uses of the invention. These and other embodiments, features, and advantages of the present invention will become more apparent to those skilled in the art when taken with reference to the following detailed description of the invention in conjunction with any accompanying drawings.
[0046]As used in this specification and the appended claims, the singular forms “a,”“an,” and “the” include plural referents unless the context clearly indicates otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this invention belongs. All composition numbers and ranges based on percentages are weight percentages, unless indicated otherwise. All ranges of numbers or conditions are meant to encompass any specific v...
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| Hydrophobicity | aaaaa | aaaaa |
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Abstract
An oleophilic and hydrophobic nanocellulose material is disclosed herein, for nanocellulose sponges and other applications. The oleophilic and hydrophobic nanocellulose material comprises lignin-coated cellulose nanofibrils and / or lignin-coated cellulose nanocrystals. In various embodiments, the nanocellulose material is in the form of a 2D coating or layer, or a 3D object (e.g., foam or aerogel). The nanocellulose material may be disposed onto a scaffold. A process is provided for producing an oleophilic and hydrophobic nanocellulose object, comprising fractionating a biomass feedstock with an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a lignin-containing liquor; mechanically treating the cellulose-rich solids to form cellulose fibrils and / or cellulose crystals; generating a nanocellulose object from the intermediate nanocellulose material; exposing the nanocellulose object to the lignin-containing liquor to allow lignin to deposit onto a surface of the nanocellulose object; and recovering the oleophilic and hydrophobic nanocellulose object.
Description
PRIORITY DATA[0001]This patent application is a non-provisional application claiming priority to U.S. Provisional Patent App. No. 62 / 016,372, filed Jun. 24, 2014, which is hereby incorporated by reference herein.FIELD[0002]The present invention generally relates to nanocellulose and related materials produced by fractionating lignocellulosic biomass. The invention also relates to oleophilic and hydrophobic nanocellulose materials.BACKGROUND[0003]Biomass refining (or biorefining) has become more prevalent in industry. Cellulose fibers and sugars, hemicellulose sugars, lignin, syngas, and derivatives of these intermediates are being utilized for chemical and fuel production. Indeed, we now are observing the commercialization of integrated biorefineries that are capable of processing incoming biomass much the same as petroleum refineries now process crude oil. Underutilized lignocellulosic biomass feedstocks have the potential to be much cheaper than petroleum, on a carbon basis, as we...
Claims
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Login to View More IPC IPC(8): C08L1/02D21C3/04C08J7/04C08J9/36C09D101/02C08J9/00
CPCC08L1/02C09D101/02C08J9/0061C08J7/047C08J9/365Y10T442/20C08J2301/02C08J2497/00Y10T428/2933Y10T428/2991D21C3/04C08B37/0057C08H8/00C09D197/005D21C9/007D21C11/0007D21H11/08D21H19/34Y02P40/40Y02E50/10
InventorRETSINA, THEODORANELSON, KIMBERLY
OwnerAPI INTELLECTUAL PROPERTY HOLDINGS LLC