Pure Hydroxyl Cellulose Nanofibrils

Product Name

^{Name:Pure Hydroxyl Cellulose Nanofibrils}

Product Overview

^{Sulfonated cellulose nanofibrils (S-CNFs) are functional materials modified by sulfonic acid groups of cellulose nanofibers, which have shown significant application value in the field of water treatment, composite reinforced phases, catalytic carriers, biomedical materials, energy fields and other fields with the unique chemical activity and physical properties conferred by sulfonic acid groups (-SO₃H) introduced on the surface. The sulfonic acid group is a strongly polar group, which endows the material with good hydrophilicity and ion exchange ability, and can interact with other substances (such as metal ions, polymer molecules) through ionic bonds, hydrogen bonds, etc., to provide a reaction site for further functional modifications (such as grafted polymers, loaded active substances). Due to the strong electrostatic repulsion of sulfonic acid groups, S-CNFs have excellent dispersibility in water or polar solvents, are not easy to agglomerate, and can form a stable suspension, which is better than unmodified cellulose nanofibers.}

Product Features

^{High hydrophilicity and dispersion: The strong polarity of sulfonic acid groups makes S-CNFs easily dispersed in polar solvents such as water and ethanol, forming a stable colloidal system that is easy to process into films, gels or composites.
Excellent mechanical properties: retains the high crystallinity and length-to-diameter ratio of cellulose nanofibers, and can significantly improve the mechanical strength of composites (such as Young's modulus and tensile strength) when compounded with other materials.
Ion exchange and adsorption capacity: Sulfonic acid groups can exchange ions with metal cations (such as Cu²⁺, Pb²⁺) and have efficient adsorption performance for heavy metal ions
Thermal stability: It has good thermal stability below 200°C, meeting the temperature requirements of most processing scenarios (such as film hot pressing, composite molding).
Biocompatibility: Based on natural cellulose skeleton, it has good biocompatibility and degradability, is environmentally friendly, and is suitable for use in biomedical, food contact and other fields.}

Application Fields

^{Water treatment field: as a heavy metal ion adsorbent, used in wastewater treatment (such as electroplating wastewater, removal of heavy metals in industrial sewage);  Composite reinforced phase: used to strengthen polymers (such as epoxy, polylactic acid, rubber), ceramics, cement and other materials to improve their mechanical properties, thermal stability and dimensional stability, used in packaging materials, building materials, electronic device shells, etc.Catalytic support: Sulfonic acid groups can be used to load metal catalysts (such as Pd, Pt) through ionic bonds, or directly as acidic catalysts (such as for esterification reactions), binding to the porous structure of cellulose to improve catalytic efficiency and recovery performance.
Biomedical materials: hydrogels and stent materials with antibacterial properties (by loading antibacterial agents) or sustained-release drugs can be prepared for wound dressings, tissue engineering and other fields.
Energy field: As a modifier for battery separators (to improve ionic conductivity), electrode materials for supercapacitors (to enhance conductivity and stability), etc.}

Attention in use

^{Because there are no charged groups on the surface, the stability of the dispersion depends on hydrogen bonding and mechanical shear, and long-term storage is prone to slight agglomeration, which needs to be stirred or sonicated regularly.
Avoid contact with strong oxidants or high temperature (>200°C) environments to prevent hydroxyl groups from being oxidized or degraded.}

^{When compounding with synthetic polymers, the interface compatibility may be insufficient due to hydrophilic differences, and it needs to be optimized by physical blending process (such as adding compatible agents).}

^{Related Information}

^{Please e-mail for the detailed characterization data.}

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