Abstract
Plants contain the most abundant natural polymer cellulose in nature. Plants
have a multilayered structure, made up of cells at the microscopic level. The main
material of cells exists in the cell wall, mainly in the form of cellulose nanofilament-matrix composite structure, which plays a crucial role in the performance and function
of plants. Nanocellulose, as a kind of environmentally friendly renewable polymer
material, has great application potential and ecological benefits. In this chapter, the
structural properties and preparation methods of nanocellulose are introduced, and the
characterization methods and modification methods of nanocellulose are summarized.
Finally, the design and construction of new nanocellulose materials in the future are
prospected.