TEMPO-Oxidized Cellulose Nanofibrils (TO-CNF)
Overview
Prepared through TEMPO-mediated oxidation, this material features a carboxyl-rich nanofibril surface, high aspect ratio, and excellent water dispersibility, enabling the formation of a stable nanofibrous network. It provides reinforcement, thickening, thixotropic behavior, suspension stabilization, film formation, and hydrogel-forming capabilities, making it suitable for research and development in coatings and inks, hydrogels, adhesives, packaging films, papermaking, 3D printing.
General information
| Product Name | TEMPO-Oxidized Cellulose Nanofibrils (TO-CNF) |
|---|---|
| Abbreviation | TO-CNF / COOH-CNF |
| Surface Functional Groups | Carboxyl and Hydroxyl group |
| Product Form | Hydrogel/Powder |
| Raw Material Source | Plant-derived cellulose |
| Surface Charge | Anionic |
Specifications
| Appearance | Transparent gel |
|---|---|
| Solid content | 1-2wt%（Available upon request） |
| Fiber diameter | 5-10nm |
| Fiber length | ≥1μm |
| Crystallinity | ≥70% |
| Carboxyl Group Content | 1.2mmol/g |
| PH | 6-8 |
| Dispersion Medium | Deionized Water |
Product details
Product Appearance
Product Characterization
Recommended Applications
Hydrogels；Rheology Modification；Coatings；Adhesives；3D Printing；Membrane Materials；Composite Reinforcement
Application Guidelines
Recommended Dosage
C-CNF exhibits pronounced network-forming and thickening effects. It is recommended to start with a dosage of 0.1–1 wt% based on the dry weight of the matrix, with a suggested screening gradient of 0.1%, 0.3%, 0.5%, and 1.0%.
Addition Method
Dilute C-CNF to an appropriate concentration before use, then slowly add it to the aqueous polymer, coating, hydrogel, or adhesive system under continuous mixing.
Dispersion Method
Mechanical stirring or high-shear mixing can be used for dispersion. For high-viscosity systems, gradual or stepwise addition is recommended to facilitate uniform dispersion.
Precautions
Excessive addition may result in a rapid increase in viscosity, increased difficulty in deaeration, and reduced leveling performance. The effects of salts and multivalent ions on the dispersion stability and rheological behavior of C-CNF should also be considered.
Small-Scale Trial Recommendations
In addition to mechanical properties, it is recommended to simultaneously evaluate and record viscosity, thixotropy, leveling performance, and film-forming behavior during preliminary trials.
Packaging & Shipping
We support gram-scale samples, kilogram-scale trial quantities, and bulk orders of metric-ton quantities or above, meeting procurement requirements across different stages, including research and development testing, pilot-scale validation, and industrial-scale applications.
Samples are supplied in sealed packaging and are preferably shipped via international express delivery. Please contact our customer service team for an international shipping quotation when placing an order.
For kilogram-scale and larger quantities, packaging options such as drums, large drums, or IBC totes are selected according to the product form and order volume, with an appropriate logistics and transportation method arranged accordingly.
FAQ
Q: What is the difference between carboxylated CNF and conventional CNF?
A: Carboxylated CNF incorporates carboxyl groups onto the cellulose backbone in addition to the intrinsic hydroxyl groups. This gives the nanofibers more pronounced anionic characteristics and interfacial functionality. Conventional hydroxyl-functionalized CNF primarily relies on hydrogen bonding and fiber-network formation for its functional performance.
Q: Why does CNF become highly viscous with only a slight increase in concentration, and why can it form a gel-like structure at around 1 wt%?
A: CNF has a high aspect ratio. As the concentration increases, the nanofibers readily become entangled and form a continuous three-dimensional network throughout the dispersion. The hydration and electrostatic interactions associated with surface carboxyl groups can further enhance network stability. As a result, even at relatively low solid contents, CNF may exhibit high viscosity or gel-like behavior.
Q: What properties can carboxylated CNF improve when incorporated into water-based coatings?
A: Key properties to evaluate include suspension stability, sedimentation resistance, thixotropy, sag resistance, and coating reinforcement. The actual performance depends on factors such as dosage, system solids content, salt and multivalent-ion concentration, and dispersion quality.
Q: What is the typical dosage of carboxylated CNF, and how should it be incorporated?
A: A dosage gradient of 0.1–1 wt% based on the dry weight of the matrix can be used for initial screening. It is recommended to first dilute C-CNF to an appropriate concentration, then add it slowly and incrementally into the main aqueous phase under continuous stirring or shear mixing. This helps prevent localized high concentrations and agglomeration.