Overview
Surface hydrophobization improves the compatibility of CNF with low-polarity matrices such as silicone, resins, and rubber, while retaining the reinforcing characteristics of its high-aspect-ratio fibrous network. CelluBio provides material selection guidance and small-scale trial references for academic research and industrial R&D.
General information
| Product Name | Hydrophobic Cellulose Nanofibrils |
|---|---|
| Abbreviation | H-CNF / HP-CNF |
| Surface Functional Groups | –OH、–CH₃ |
| Product Form | Powder |
| Raw Material Source | Plant-Derived Cellulose |
| Surface Charge | Nonionic / Weakly Charged Surface |
Specifications
| Appearance | White Powder |
|---|---|
| Diameter | 30-100nm |
| Length | ≥5μm |
| Crystallinity | ≥70% |
| Functional Group Content | 0.89mmol/g |
| pH | 6-8 |
Product details
Product Appearance
Product Characterization
Recommended Applications
Silicone Reinforcement；Rubber；Resins；Plastics；Hydrophobic Coatings；Composite Films；Interfacial Reinforcement
Application Guidelines
Recommended Dosage
For silicone, rubber, resin, and related systems, an initial addition level of 0.2–3 wt% is recommended.
Addition Method
Pre-disperse the material in a compatible medium or in a portion of the resin/silicone component before incorporating it into the main matrix.
Dispersion Method
High-speed shear mixing, planetary mixing, or moderate ultrasonication may be used, depending on the viscosity and characteristics of the system.
Precautions
The degree of hydrophobic modification and surface treatment method can directly affect the compatibility of the material with different media. Direct addition at high concentrations into aqueous systems is not recommended without prior compatibility testing.
Small-Scale Trial Recommendations
A three-level loading gradient of 0.5%, 1%, and 2% is recommended. Key evaluation parameters should include dispersion stability, tensile/tear performance, interfacial adhesion, and changes in water absorption.
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 hydrophobically modified CNF and conventional CNF?
A: Hydrophobic modification reduces the surface hydrophilicity of CNF, which generally improves its interfacial compatibility with low-polarity polymers and hydrophobic media. Conventional CNF is more suitable for aqueous and hydrophilic systems.
Q: How should the effectiveness of hydrophobic modification be characterized?
A: The modification effect can be evaluated using a combination of contact angle measurements and surface chemical characterization techniques such as FTIR and XPS. The dispersion behavior in the target medium and the interfacial morphology of the resulting composite should also be considered for a comprehensive assessment.
Q: Can hydrophobic CNF be incorporated into epoxy, silicone, rubber, PLA/PBAT, and similar systems?
A: It has potential for application research in these systems. However, different resins vary significantly in polarity, curing mechanisms, and processing temperatures. It is recommended to first conduct medium-compatibility and low-loading dispersion tests before incorporating the material into a complete formulation.
Q: What are the advantages of hydrophobic CNF over conventional CNF for polymer reinforcement?
A: The primary advantage is its potential to improve interfacial compatibility and dispersion within hydrophobic matrices, thereby reducing the risk of agglomeration that can occur when hydrophilic nanocellulose is directly incorporated into low-polarity resins.