Abstract: A microparticle comprised of dried cellulose nanocrystals agglomerated together and forming said microparticle is provided, wherein the CNCs are surfaced-reduced carboxylated CNCs, and wherein the microparticle is nanoredispersible into its constituting cellulose nanocrystals in both aqueous and non-aqueous solvents. A method for producing nanoredispersible microparticles comprised of dried CNCs is also provided.

Abstract: Proteinaceous cellulose microparticles are provided. These microparticles comprise cellulose nanocrystals and one or more peptide, one or more protein, or a mixture thereof, wherein the nanocrystals and the peptide(s) and/or protein(s) are aggregated together to form the microparticles. In embodiments, the microparticles comprise silk fibroin and advantageously are hydrophobic and lipophilic. There are also provided cosmetic preparations comprising these microparticles. In advantageous embodiments, these cosmetic preparations comprise a water-in-oil emulsion or a lipophilic medium. Finally, there are also provided methods of producing the microparticles.

Abstract: Microparticles comprising carboxylated, sulfated, or phosphated cellulose nanocrystals (CNCs) and pigment nanoparticles are provided. In these particles, the cellulose nanocrystals and the pigment nanoparticles are agglomerated together thereby forming said microparticle, and wherein the pigment nanoparticles are bound to the surface of the cellulose nanocrystals. Cosmetic preparations comprising these microparticles are also provided. Finally, a method for producing the microparticles is provided. The method comprises the steps of a) producing an aqueous suspension of carboxylated, sulfated, or phosphated CNCs with pigment nanoparticles bound thereto; and b) drying said aqueous suspension to produce the microparticles.

Abstract: A powdery cosmetic composition in the form of a compacted powder including, in a physiologically acceptable medium, (i) a pulverulent phase including nanocrystalline cellulose, and (ii) a binder phase. Also, the use of the pulverulent phase for the preparation of a cosmetic composition in the form of compacted powder with satisfactory cohesive properties.

Abstract: A method for producing functionalized nanocrystalline cellulose, the method comprising the steps of providing cellulose, mixing said cellulose with a peroxide, thereby producing a reaction mixture, and heating the reaction mixture, and/or exposing the reaction mixture to UV radiation is provided. Functionalized nanocrystalline cellulose produced by this method is also provided.

Abstract: A pigment comprising dyed crystalline cellulose particles comprising a crystalline cellulose core having a surface charge, optionally one or more polyelectrolyte layers with alternating charges adsorbed on top of each other on the crystalline cellulose core, the polyelectrolyte layer closest to the core having a charge opposite the surface charge of the core, and at least one organic dye having a charge is provided.