1. Introduction to nanocellulose

Nanocellulose is a nano-scale material obtained by using natural cellulose as raw material and processed by physical, chemical or enzymatic methods Its diameter is usually between . 5-100 nm and its length can reach several microns, with high specific surface area, high crystallinity and excellent mechanical properties. As a renewable resource, nanocellulose is not only environmentally friendly and non-toxic, but also has excellent degradability, so it has attracted widespread attention in the fields of sustainable development and green materials.

2. Classification of nanocellulose

Common nanocelluloses can be divided into the following three categories:

Cellulose nanocrystals ( CNC ) - obtained by acid hydrolysis and other methods, with high crystallinity and rod-like structure.

Cellulose nanofiber filaments ( CNF ) - prepared by mechanical methods such as high-pressure homogenization and slurry refining, showing a mesh three-dimensional structure.

Bacterial cellulose ( BC ) - produced by fermentation of specific strains, with extremely high purity and unique physical properties.

3. Core properties of nanocellulose

Strong mechanical properties : higher specific strength and specific modulus than steel.

High transparency : Suitable for flexible displays and transparent films.

Excellent barrier properties : It can effectively block oxygen and grease in food packaging.

Environmentally friendly and biodegradable : completely derived from renewable plant fibers, in line with the trend of green materials.

IV. Application fields of nanocellulose

Paper and Packaging : Increase paper strength and produce biodegradable food packaging.

Electronics and energy : used in flexible displays, lithium battery separators, and supercapacitors.

Pharmaceutical and biomaterials : Can be used in drug carriers, artificial skin, and wound dressings.

Cosmetics and daily chemicals : Enhance the stability of the lotion and improve the touch.

Polymer composite materials : added to plastic or rubber as reinforcement to improve performance.

V. Market prospects of nanocellulose

According to industry reports, the global nanocellulose market size is expected to maintain an average annual growth rate of more than 20% in the next few years . Driven by the ' dual carbon target ' and green degradable materials policies, nanocellulose is expected to be widely used in packaging, energy, medicine and polymer composite materials , becoming an important choice to replace traditional petrochemical materials.

6. Conclusion

Nanocellulose has both high performance, green environmental protection and broad application potential , and is an important breakthrough in the fields of materials science and sustainable development in the future. With the maturity of the preparation process and the advancement of large-scale production, nanocellulose will play an increasingly important role in the global industrial chain.