Overview
Combining a positively charged surface with the high-aspect-ratio network structure of CNF, this material can provide electrostatic adsorption, fibrous network formation, and rheological regulation simultaneously.
General information
| English Name | Cationic Cellulose Nanofibrils |
|---|---|
| Abbreviation | Cat-CNF |
| Surface Functional Groups | –OH and Cationic Functional Groups |
| Product Form | Hydrogel/Powder |
| Raw Material Source | Plant-Derived Cellulose |
| Surface Charge | Cationic |
Specifications
| Appearance | Transparent, Gel-Like |
|---|---|
| Solid Content | 1wt% |
| Diameter | 5-10nm |
| Length | ≥1μm |
| Crystallinity | ≥70% |
| Functional Group Content | 2.4mmol/g |
| pH | 6-8 |
| Dispersion Medium | Deionized Water |
Product details
Product Appearance
Product Appearance
Recommended Applications
Water Treatment; Dye Adsorption; Color-Adsorbing Materials; Functional Paper; Functional Films; Coatings; Polyelectrolyte Complexes
Application Guidelines
· The rheological impact of CNF can be significant; therefore, it is recommended to start with relatively low addition levels. For an initial small-scale trial, a loading gradient of 0.1%, 0.3%, 0.5%, and 1% based on the dry weight of the matrix can be evaluated.
· Preferably pre-dilute and uniformly disperse the CNF before gradually incorporating it into the main aqueous phase. For high-viscosity systems, stepwise addition is recommended to avoid the formation of fiber agglomerates caused by adding the material all at once.
· When used in hydrogels, coatings, adhesives, or 3D printing, viscosity, thixotropy, leveling, and film-forming performance should be monitored simultaneously rather than evaluating only the final mechanical strength.
· For charged CNF, particular attention should be paid to compatibility with salts, multivalent ions, pH, and cationic/anionic additives. For hydrophobic CNF, the compatible medium should be selected according to the type of surface modification.
· Excessive CNF loading may result in excessively high viscosity, difficulties in deaeration, and a narrower processing window. The loading level and shear conditions should therefore be optimized together.
Packaging and Transportation
Available in gram-scale samples, kilogram-scale trial quantities, and bulk orders of one metric ton or more, meeting procurement needs at different stages, including research and 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: Why is cationic CNF positively charged, and how is its surface charge characterized?
A: Cationization introduces positively charged functional groups onto the cellulose surface, giving CNF a positive charge under suitable aqueous conditions. Surface charge is typically evaluated using measurements such as zeta potential, together with characterization of the relevant functional groups.
Q: Why does cationic CNF tend to flocculate when added to anionic systems?
A: When oppositely charged components are present at excessively high local concentrations, rapid electrostatic complexation may occur, potentially leading to charge neutralization and loss of dispersion stability. Therefore, pre-dilution, gradual addition, and controlled component ratios are recommended.
Q: Why is cationic CNF suitable for dye adsorption and color-adsorbing materials?
A: Its positively charged surface can generate electrostatic attraction with anionic dyes and negatively charged contaminants, making it suitable for adsorption, interfacial assembly, and functional carrier applications.
Q: How should cationic CNF and the corresponding cationic CNC be selected?
A: CNF is generally more suitable when a fibrous network, film formation, thickening, or structural support is required. CNC can be preferentially evaluated when particulate nanomaterials, lower network-induced thickening, or interfacial assembly is desired.