Preparation process of nanocellulose and its technological innovation

With the further advancement of the concept of green materials and sustainable development, nanocellulose ( Nanocellulose ) is becoming a research hotspot in the field of new materials worldwide due to its excellent mechanical properties, biocompatibility and environmental friendliness. As a high-performance nanomaterial derived from natural cellulose, the optimization of its preparation process directly determines the performance and application scope of the product. Nanjing Tianlu Nanotechnology Co., Ltd. has continuously explored more efficient and stable nanocellulose preparation technologies during many years of R&D and industrialization, providing reliable technical support to the industry.

1. Preparation principle of nanocellulose

The preparation of nanocellulose mainly relies on dissociating the microstructure of natural cellulose to reduce the cellulose molecular chain from the micron level to the nanometer level, thereby obtaining nanofibers with high specific surface area and high crystallinity. According to different preparation methods, common processes can be divided into mechanical methods, chemical methods, enzymatic methods, and composite methods .

2. Preparation by mechanical method

Mechanical method is the earliest way to realize industrial production, mainly including high-pressure homogenization, ultrasonic treatment, grinding and dispersion and other methods. The advantage of this method is that it has no chemical residues and is environmentally friendly, but it consumes high energy and requires large equipment. Based on traditional mechanical dispersion, Nanjing Tianlu Nanotechnology Co., Ltd. has greatly reduced energy consumption by optimizing fiber pretreatment and energy utilization efficiency, while improving the uniformity of fiber length distribution, providing guarantee for large-scale and stable production.

3. Chemical preparation

Chemical methods use chemical reactions to weaken the hydrogen bonds between cellulose molecules, making them easier to dissociate. The most representative process is the TEMPO oxidation method . This method uses the TEMPO ( 2,2,6,6- tetramethylpiperidinyloxy radical) catalytic system to partially oxidize the hydroxyl groups on the cellulose surface into carboxyl groups, thereby giving nanocellulose higher dispersion and negative charge stability. The nanocellulose produced by this process has high transparency, strong dispersion and easy functionalization, and is very suitable for high-performance composite materials and flexible electronics.

Nanjing Tianlu Nanotechnology Co., Ltd. has made key improvements in the TEMPO oxidation system, using recyclable oxidants and controllable reaction conditions to achieve a low-pollution, reusable green production model. This technological breakthrough not only reduces waste liquid emissions, but also significantly improves oxidation efficiency and product purity.

4. Preparation by enzymatic and composite methods

The enzymatic method utilizes the selective degradation properties of cellulase to achieve partial dissociation of cellulose under mild conditions and avoid structural damage. The compound law combines the advantages of machinery, chemistry and enzymatic methods to achieve efficient preparation through multi-stage synergy. Nanjing Tianlu Nanotechnology Co., Ltd. has accumulated rich experience in the field of composite preparation. By controlling the reaction sequence and parameters, it has achieved high dispersion, high stability and low-cost preparation of nanocellulose.

5. Process optimization and application prospects

In terms of process optimization, the Tianlu team focuses on the entire process management from raw material pretreatment, reaction control to post-drying to ensure that the product achieves the best balance between performance and cost. The nanocellulose produced by the company has been widely used in coating materials, food packaging, biomedicine, electronic components and composite material reinforcement and other fields.

In the future, with the rapid development of the low-carbon materials and degradable packaging markets, the preparation process of nanocellulose will further evolve towards intelligence and modularization. Nanjing Tianlu Nanotechnology Co., Ltd. will continue to focus on technological innovation, promote large-scale and green production of nanocellulose , and inject stronger impetus into the development of the new materials industry.