Silica nanoparticles

Description

1. Product Overview
Silica nanoparticles (nano-SiO₂) are high-purity, amorphous silicon dioxide engineered at the sub-100nm scale to deliver exceptional surface area, reactivity, and dispersion stability. Their primary industrial use spans reinforcement of elastomers, controlled drug delivery matrices, and high-performance anti-corrosion coatings. The key value proposition is enabling superior mechanical strength, thermal stability, and barrier properties at lower loading levels than conventional micronized silica. Strategically, these particles are critical for industries transitioning to lightweight, high-durability materials and precision nanomaterial integration under tightening global performance standards.

2. Key Specifications & Technical Characteristics

• Chemical composition: Amorphous SiO₂ (≥99.5% purity)

• Purity grade: 99.5% – 99.9% (trace metals ≤50 ppm)

• Physical form: White free-flowing nanopowder

• Particle size (D50): 10 nm, 20 nm, 50 nm, or 100 nm (±5 nm batch control)

• Specific surface area (BET): 150 – 600 m²/g (grade dependent)

• Bulk density: 50 – 120 g/L (untapped)

• pH (5% aqueous slurry): 6.5 – 7.5

• Loss on drying: ≤1.0%

• Packaging options: 1 kg vacuum-sealed aluminum foil bags; 10 kg antistatic HDPE pails; 200 kg fiber drums with inner liner

• Shelf life: 24 months in unopened, dry, room-temperature storage (15–25°C)

3. Core Industrial Applications

• Primary industries: High-performance rubber & tires, advanced coatings & paints, lithium-ion battery separators, pharmaceutical excipients, and construction composites.

• Operational use cases:

  • Tire manufacturing: 10–30 nm SiO₂ replaces carbon black, reducing rolling resistance by 20% while maintaining wet-grip.

  • Anticorrosion coatings: 50 nm particles create tortuous barrier paths, doubling salt-spray resistance vs. micro-silica.

  • Concrete densification: 20 nm SiO₂ fills capillary pores, increasing compressive strength by 35% at 3% cement replacement.

• Why better: Uniform particle size distribution ensures zero agglomerate “hot spots”; high surface reactivity enables room-temperature curing in adhesives; lower loading (3–8 wt%) achieves same reinforcement as 15–20% fumed silica – reducing formulation cost and weight.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified with SEM+PSA batch fingerprinting; coefficient of variation (CV) for particle size <3% across 10 MT production runs.

• Supply reliability: Dual-source raw material (high-purity TEOS and rice husk ash) with 99.2% on-time-in-full (OTIF) track record over 36 months.

• Logistics capability: Temperature-controlled global shipping via IATA-compliant packaging; 72-hour dispatch for stock sizes.

• Price competitiveness: 12–18% below European and US nano-silica benchmarks due to vertically integrated silane precursor facility.

• Sustainability: Available as bio-based (rice husk ash, 78% lower carbon footprint) or synthetic TEOS grade; zero hazardous waste in production.

• Technical support: Full SDS, batch COA, dispersion protocols, and custom surface modification (hydrophobic/hydrophilic) provided within 5 business days.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 kg (mixed particle sizes permitted)

• Bulk 20MT loading capacity: 20 metric tons per 20-foot dry container (palletized, 200 kg drums)

• MT per container (20-foot standard): 20 MT net weight (22 pallets × 10 drums × 200 kg)

• Lead time: 15 working days for MOQ; 30 days for full container (20 MT)

• Incoterms supported: EXW (Ningbo/Zhanjiang), FOB, CIF (major global ports)