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Views: 0 Author: Site Editor Publish Time: 2025-06-23 Origin: Site
Nanocellulose , as a new generation of green functional materials, is gradually being applied to food packaging, biomedicine, cosmetics, energy materials and other fields due to its excellent mechanical properties, biocompatibility and environmental friendliness. Among them, ' high dispersion and suspension stability ' are important advantages that distinguish nanocellulose from traditional cellulose materials, and are also the basis for achieving its efficient processing and function in liquid phase systems.
High dispersion refers to the fact that nanocellulose can be evenly dispersed into nano-scale monofilaments or fiber network structures in water or polar solvents, and is not easy to agglomerate.
Suspension stability refers to the fact that nanocellulose remains uniformly distributed in the dispersion for a long time, is not easy to settle or flocculate, and can form a stable colloid system.
This characteristic is due to its ultra-high specific surface area, abundant hydroxyl groups and surface charged (often negative charge) characteristics, especially cellulose nanofibers ( CNF ) or nanocrystals ( CNC ) treated with TEMPO oxidation , which makes it easier to form stable aqueous suspensions.
The addition of nanocellulose for liquid phase processing and function
can be directly added to aqueous systems as colloidal stabilizers and thickeners, such as coatings, emulsions, adhesives, without additional emulsification or additives, reducing system complexity.
It has strong synergistic effect with other materials.
Its suspension system has excellent synergistic bonding ability. It can be blended with carbon nanotubes, graphene oxide, inorganic nanoparticles and other materials. It is used to prepare composite functional films or gels. It is widely used in high-end applications such as flexible electronics, aerogels, and sensors.
Reduce energy consumption and improve production efficiency.
The good dispersion of nanocellulose reduces the need for high shear and long-term stirring, and helps industrial scale preparation and continuous production.
The suspension system with strong long-term storage stability
can be stored at room temperature for several weeks or even months without settlement, which is suitable for product standardization and cross-industry supply chain circulation.
Application areas | How to use | illustrate |
Coating additives | Add nanocellulose aqueous dispersion directly | Improve sag resistance and film formation |
Food packaging | Mixed in a degradable polymer solution | Improves barrier properties and flexibility of the film |
Biomedicine | Preparation of hydrogels or drug carriers | Build porous structures to release drugs evenly with suspension |
3D printing materials | Used as structural support fluid | Maintain printing stability and rheology control |
Surface modification : such as introducing charged groups through TEMPO oxidation or carboxymethylation to improve dispersion stability;
Sonication : helps depolymerize fiber agglomerates and enhances monofilament dispersion;
pH regulation and electrolyte regulation : regulate the system Zeta potential to avoid interparticle flocculation;
Compound additives : blended with polymer stabilizers such as PVA 、PEG to enhance network stability.
The high dispersion and suspension stability of nanocellulose not only improves its processing efficiency in aqueous systems, but also expands its application boundaries in the field of functional materials. With the continuous deepening of research on material rheology and dispersion control, nanocellulose is moving from basic research to widespread application, providing solid support for the green development of all walks of life.
