1. Introduction to nanocellulose

Nanocellulose is a nanoscale material obtained by mechanical, chemical or enzymatic treatment of natural cellulose, with a diameter of only 5–100 nm . Because it comes from plant fiber or bacterial fermentation, it is not only green and environmentally friendly, but also has high strength, light weight, degradability, excellent transparency and other characteristics. Among them, high transparency is one of the most valuable features of nanocellulose in electronic and functional film applications.

2. The advantages of high transparency of nanocellulose

Excellent optical performance : The diameter of the nanocellulose filament is much smaller than the visible light wavelength ( 400–700 nm ), so it can effectively reduce light scattering and show high transparency.

High light transmittance : The light transmittance of nanocellulose transparent films can reach 85–95% , comparable to glass and polymer transparent films.

Low haze : The material has a uniform structure and low haze, which is suitable for flexible displays with extremely high requirements for visual clarity.

At the same time, maintaining mechanical properties : Unlike fragile transparent plastics, nanocellulose transparent films still have high strength and good flexibility.

III. Application areas

Flexible display

Nanocellulose transparent membranes can replace traditional ITO glass substrates and are used in smartphones, bendable tablets and wearable devices.

It has both flexibility and heat resistance, and can meet the needs of foldable electronic devices.

Transparent packaging film

It is both transparent and beautiful, and has excellent barrier properties, which is suitable for high-end packaging of food and medicines.

Completely degradable, in line with the trend of green and environmental protection.

Optical devices

It is applied to lenses, optical film layers and filters to ensure high light transmittance and stable optical performance.

Solar cell substrate

Transparent nanocellulose films can be used as the substrate material for flexible solar cells, improving the lightweight and portability of the device.

4. Comparison with traditional transparent materials

Material Type	Light transmittance	Flexibility	Environmental protection	Application prospects
Glass	高	Fragile	Non-degradable	Monitors, buildings
PET film	高	better	Difficult to degrade	Packaging, display substrate
ITO conductive glass	高	差	Non-degradable	Display, touch
Nanocellulose	高	Excellent	Completely degradable	Flexible display, transparent film

V. Conclusion

Nanocellulose has become an ideal new material in the fields of flexible display and transparent films due to its high transparency, flexibility and environmental protection . In the future, with the maturity of the preparation process and the advancement of industrialization, nanocellulose is expected to play a greater role in industries such as smart electronics, optical devices, transparent packaging and renewable energy , and help green technology and sustainable development.