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US 2017/0101738 A1Published application
Method for preparation of cellulose nanocrystals and nanofibrils
OwnerKenneth Raymond Carter, Yinyong Liinventors
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Abstract
A method for producing nanocellulose is described herein. The method includes contacting a cellulosic material with an oxidizing agent, and a compound selected from the group consisting of an alkali metal bromide, an alkali metal iodide, an alkali metal fluoride, an alkali metal chloride, or a combination thereof, in an aqueous solution to provide an oxidized cellulose mixture. The nanocellulose prepared according to the method is also described.
Claims20
A method for producing nanocellulose, the method comprising,
- contacting a cellulosic material with
- an oxidizing agent, and
- a compound selected from the group consisting of an alkali metal bromide, an alkali metal iodide, or a combination thereof,
- in an aqueous solution to provide an oxidized cellulose mixture comprising an oxidized cellulose precipitate, and
- mechanically treating the oxidized cellulose precipitate to provide oxidized cellulose nanofibrils.
2 more elements
A method for producing nanocellulose, the method comprising,
- contacting a cellulosic material with
- an oxidizing agent,
- a compound selected from the group consisting of an alkali metal bromide, an alkali metal iodide, or a combination thereof, and
- a nitroxyl radical compound,
- in an aqueous solution to provide an oxidized cellulose mixture comprising oxidized cellulose nanocrystals having an average diameter of 1 to 10 nanometers and an average length of 50 to 500 nanometers,
- wherein the nitroxyl radical compound is of the formula
- wherein R1 and R2 are independently at each occurrence a C1-6 alkyl group.
4 more elements
Dependencies are inferred from the claim text.