Aqueous Nano Bio-based Silica Dispersion

Core Features

1. Nano-scale Dispersion Stability

   The average particle size of silica in the dispersion can be controlled at 10-50 nm. Through dual modification of electrostatic stabilization and steric hindrance stabilization, there is no sedimentation or agglomeration, and the room temperature storage stability exceeds 12 months. It can still maintain a uniform dispersion state after dilution, and can be directly added to aqueous systems without additional grinding treatment.
2. Fully Environmentally Friendly System Design
   • Raw Material End: 100% derived from renewable biomass such as rice husk and bagasse, with a carbon footprint reduced by more than 60% compared with petrochemical-based silica.
   • Medium End: Deionized water is used as the only dispersion medium, with VOC content ＜5 g/L, complying with stringent environmental standards such as EU VOC Directive and China GB 18582.
   • Product End: Biodegradable with no toxic residues, suitable for scenarios with extremely high environmental requirements such as food contact materials and medical coatings.
3. Excellent Interfacial Compatibility and Functional Activity

   The particle surface is modified with hydrophilic groups, which has excellent compatibility with water-based resins, emulsions, adhesives and other substrates, enabling molecular-level interfacial bonding. The nano-scale particle size endows the product with a high specific surface area (400-600 m²/g), showing far superior functional activity in reinforcement, matting, heat insulation, antibacterial and other aspects compared with conventional micron-scale dispersions.
4. Convenient Construction and Processing Performance

   The dispersion is transparent or translucent with good fluidity, and can be constructed by conventional aqueous processes such as spraying, roller coating and curtain coating without affecting the appearance and light transmittance of the substrate. There is no pungent odor during processing, the operation is safe, and the environmental treatment cost in the production process can be significantly reduced.

Technical Parameters (Typical Values)

Application Fields

1. Water-based Coatings and Inks: Added as a matting agent and reinforcing agent to water-based wood coatings, UV water-based coatings and water-based plastic coatings, it can achieve high matting efficiency, excellent wear and scratch resistance, and improve the adhesion and weather resistance of the coating; in water-based inks, it can improve printability and color stability.
2. Biomedical Materials: Used in medical coatings and tissue engineering scaffold materials, it realizes antibacterial, anti-inflammatory or cell adhesion regulation functions by virtue of its biocompatibility and nano-activity.
3. New Energy Field: As a modifier for lithium battery cathode materials and separator coating materials, it improves the cycle stability, rate performance and thermal safety of batteries; it can also be used for the modification of fuel cell proton exchange membranes to enhance proton conduction efficiency.
4. Daily Chemicals and Textiles: Added to water-based cosmetics and textile finishing agents, it exerts functions such as thickening, sun protection and antistatic, complying with the environmental and safety requirements of daily chemical products.

Usage Recommendations

1. Addition Level: Adjust according to application scenarios. The recommended addition level is 1%-5% for water-based coatings, 3%-8% for new energy materials, and 0.5%-2% for daily chemical products.
2. Addition Method: Slowly add the dispersion during the stirring of the aqueous system, control the stirring speed at 500-1000 r/min, and stir for 10-15 minutes to achieve uniform dispersion; avoid high-speed shearing which may cause particle agglomeration.
3. Storage Conditions: Seal and store in a cool and dry place, control the temperature at 5-30℃, avoid freezing, exposure to sunlight and severe vibration. The shelf life is 12 months.