Synthesis of cellulose micro and nanoparticles from cotton banknotes
OwnerGabriel D. Patterson, James D. Mcmanus +4inventors
InventorsGABRIEL D. PATTERSON, JAMES D. MCMANUS, WILLIAM J. ORTS, SAIRA NAZNEEN, BRENDAN HUGHES, DANE MCSPEDON
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Abstract
Described herein are economic, scalable, and environment-friendly compositions and methods of preparing various nanocellulose-based materials. Inexpensive materials and processing conditions for efficient manufacturing methods are described for preparing compositions; methods of using the compositions are also described.
Claims23
A method of preparing alkylated micro-scale and nano-scale cellulose from banknotes comprising:
- autoclaving cotton banknotes,
- alkylating cellulosic fibers in the bank notes in suspension with a solvent, an alkalizing agent, and an alkylating agent,
- filtering and washing followed by dialysis of the alkylated fibers, and;
- defibrillating using mechanical shear force of the chemically-modified fibers to provide the alkylated micro- and nano-scale cellulose derivatives, including cellulose microfibrils, cellulose nanofibrils, and cellulose nanocrystals.
A composition comprising conductive nanocelluloses, including uniform (mono) dispersions of cellulose nanofibrils (CNFs) or cellulose nanocrystals (CNCs), or a poly-dispersion thereof.
A method using a composition of conductive cellulose nanofibrils (CNF) and cellulose nanocrystals (CNC) for security properties to enable tracking features for product packaging of pharmaceuticals, wines, jewelry, perfumes, devices, electronic goods and merchandise.
A method of manufacturing conductive cellulose nanofibril and cellulose nanocrystal (CNF/CNC) coated printing and packaging material comprising the steps of:
- Autoclaving a cellulose feedstock selected from currency notes or high security documents or municipal solid waste,
- alkylating of the cellulosic feedstock in suspension with a solvent, an alkalizing agent, and an alkylating agent,
- filtering and washing followed by dialysis of the alkylated fibers, and;
- defibrillating using mechanical shear force of the alkylated fibers to provide the alkylated micro- and nano-scale cellulose derivatives, including cellulose microfibrils, cellulose nanofibrils, and cellulose nanocrystals, and
- coating a paper or cotton/nylon-12 to a CNF and CNC coated printing and packaging material.
Dependencies are inferred from the claim text.