Cellulose fiber assembly and method for preparing the same, fibrillated cellulose fibers and method for preparing the same, and cellulose fiber composite

A method for preparing a cellulose fiber assembly, comprising:

• fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers in a dispersion medium,
• removing the dispersion medium from the fibrillated cellulose fibers to obtain a cellulose fiber assembly,
• reacting the cellulose fibers with a reducing agent, and
• reacting the cellulose fibers with a chemical modifier, wherein the chemical modifier is a halogenation reagent selected from the group consisting of acetyl halides, acryloyl halides, methacryloyl halides, propanoyl halides, butanoyl halides, 2-butanoyl halides, pentanoyl halides, benzoyl halides, naphthoyl halides, and combinations thereof.

A method for preparing a cellulose fiber assembly, comprising:

• fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers in a dispersion medium,
• removing the dispersion medium from the fibrillated cellulose fibers to obtain a cellulose fiber assembly,
• reacting the cellulose fibers with a reducing agent, and
• reacting the cellulose fibers with a chemical modifier, wherein the chemical modifier is an alcohol selected from the group consisting of methanol, ethanol, propanol, 2-propanol, and combinations thereof.