Carboxyl/Sulfate Dual-Functional Cellulose Nanocrystals
Overview
Featuring both carboxyl and sulfate ester groups as major functional sites while retaining the intrinsic hydroxyl groups of cellulose, this material offers a broader range of ionic, electrostatic, and hydrogen-bonding interactions. CelluBio provides material selection guidance and preliminary trial recommendations for academic research and industrial R&D applications.
General information
| Product Name | Carboxyl/Sulfate Dual-Functional Cellulose Nanocrystals |
|---|---|
| Abbreviation | DF-CNC |
| Surface Functional Groups | –OH、–COOH/–COO⁻、–OSO₃H |
| Product Form | Aqueous Dispersion |
| Raw Material Source | Plant-Derived Cellulose |
| Surface Charge | Anionic |
Specifications
| Appearance | White to Light Blue Liquid |
|---|---|
| Solid Content | 2-4wt%(Available upon request） |
| Diameter | 10-20nm |
| Length | 100-400nm |
| Crystallinity | ≥75% |
| Surface Functional Group Content | 0.3-0.6mmol/g |
| pH | 6-8 |
| Dispersion Medium | Deionized Water |
Product details
Product Appearance
Product Characterization
Recommended Application Areas
Adsorption；Ionic Crosslinking；Hydrogels；Functional Films；Composite Materials；Interfacial Regulation
Application Guidelines for Carboxyl/Sulfate Dual-Functional Cellulose Nanocrystals
Recommended Dosage
An initial dosage of 0.1–2 wt% is recommended. For preliminary trials, dosage levels of 0.25%, 0.5%, 1%, and 2% may be evaluated.
Addition Method
First dilute the material uniformly with deionized water, then slowly add it to the main aqueous phase. For ionic crosslinking applications, it is recommended to introduce the crosslinking ions at the final stage.
Dispersion Method
Begin with low-speed pre-mixing followed by mechanical stirring. Short-duration ultrasonication may be used if necessary.
Precautions
With both carboxyl and sulfate ester groups on the surface, the material exhibits a relatively high density of charged functional sites and may show more pronounced responses to salt concentration, pH, and multivalent ions.
Preliminary Trial Recommendation
It is recommended to evaluate different pH levels and ionic strengths in parallel to identify optimal dispersion stability and functional performance.
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: What is the difference between carboxyl/sulfate dual-functional CNC and carboxyl-functionalized CNC?
A: Dual-functional CNC contains both carboxyl and sulfate ester groups, providing a broader range of surface charge characteristics, ionic interactions, and interfacial interactions. In contrast, carboxyl-functionalized CNC primarily exhibits functionality associated with carboxyl groups.
Q: Is dual-functional CNC sensitive to pH, salts, and multivalent ions?
A: These factors should be carefully considered. The ionization and electrostatic screening behavior of the two types of ionic functional groups can vary with pH and ionic strength. Multivalent ions may also induce complexation or flocculation.
Q: Which applications are particularly suitable for dual-functional CNC?
A: Applications involving adsorption and separation, ionically crosslinked hydrogels, functional films, interfacial regulation, and charged nanocomposites can be evaluated as key application areas.
Q: How should dual-functional CNC be incorporated when preparing hydrogels?
A: First pre-disperse the CNC in deionized water and add it to the main polymer matrix. If ionic crosslinking with ions such as Ca²⁺ is used, it is recommended to introduce the crosslinking ions at the final stage to minimize premature localized aggregation.