With the increasing demand for efficient, low toxicity, and high stability pesticides in agricultural development, silica plays an important role in pesticide formulations due to its excellent physical and chemical properties, such as high specific surface area, adjustable pore size, and good biocompatibility.
1、 Classification by manufacturing process and technical parameters
1. Gas phase silica
① Specific surface area: 100-600m ²/g (high-end products can reach 800m ²/g)
② Particle size: 7-40nm (primary particles)
③ Purity: ≥ 99.8%
④ Application: Pesticide suspension agent thickener (suspension stability increased by 50%), wettable powder carrier
2. Precipitation method silica
① Specific surface area: 20-200m ²/g
② Particle size: 10-100 μ m
③ Purity: ≥ 99.0%
④ Application: Anti caking agent for pesticide granules
3. Water soluble silica powder
① SiO ₂ content: ≥ 55% (instant type)
② Water insoluble substance: ≤ 0.1%
③ PH value: 8-10
④ Application: Foliar fertilizer enhancer (increases absorption and utilization rate by 30 times)
2、 Reference for Pesticide Specific Parameter Standards
1. Suspension agent formula
① Suspension rate ≥ 90% (wettable powder standard)
② Oil absorption value: 2.5-3.5ml/g
③ Water insoluble substance ≤ 0.1% (instant type)
2. Requirements for slow-release system
① Aperture distribution: 2-10nm (HMS type)
② Load rate ≥ 50% (pesticides such as thiamethoxam)
③ PH response range: 5.0-7.5
3、 Development Trends
1. The tightening of China's Environmental Protection Law is driving the industry towards green production transformation. By 2025, the market share of environmentally compliant enterprises is expected to reach 78%, which will undoubtedly increase the demand for silicon dioxide used in pesticides.
2. Nano modification is used to prepare silica particles with a particle size of 50-100nm by chemical vapor condensation method, with a specific surface area of 400-600m ²/g, significantly improving pesticide loading rate.
3. The biosynthetic method utilizes rice husk ash to prepare porous spherical particles with a purity of 98.9% and a cost reduction of 40%.
4. Mesoporous structure regulation (pore size 2-5nm) achieves sustained release effect, increases pesticide utilization rate by more than 30%, and surface grafting of amino/carboxyl groups enhances affinity with pesticide molecules.
4、 Competition and Pattern
1. Market concentration
① The top five global manufacturers hold a 62% market share, with China's precipitated silica production capacity accounting for over 90%.
② High end gas-phase products still rely on imports, with a localization rate of less than 30%.
2. Emerging growth points
① The demand for foliar fertilizer enhancers has surged, and the market size of water-soluble silica (SiO ₂ ≥ 55%) has increased by 12.3% annually.
② The annual number of patent applications for the application of nano silica in pesticide slow-release systems has increased by 24%.