Based on current industry research and production practices, the following points can be summarized:
1、 Particle size refinement and dispersion optimization
1. Nano scale particle size control: By regulating the reaction kinetics between sodium silicate and acid (such as gradient heating and pulse feeding), combined with ultrasound assisted dispersion technology, the particle size can be stabilized in the range of 10-40nm, improving the efficiency of rubber reinforcement and coating leveling.
2. High shear dispersion process: Introducing high shear emulsification equipment during the precipitation stage to destroy secondary aggregates, increasing the specific surface area to over 300m ²/g, significantly enhancing ink absorption and plastic filling uniformity.
2、 Innovation in surface modification technology
1. Composite coupling agent system: using silane coupling agent (such as Si69) and ionic liquid for synergistic modification, reducing the surface hydroxyl density by more than 40%, solving the problem of rubber sticking to the roller, and improving the rubber interface adhesion.
2. In situ graft polymerization: Introducing vinyl monomers during the precipitation process to achieve chemical bonding between polymer chains and hydroxyl groups on the surface of white carbon black, improving its dispersion stability and UV resistance in plastics.
3、 Green and low-carbon process upgrade
1. Resource recycling: Recovering sodium sulfate from acidified wastewater, preparing by-product Yuanming powder through evaporation and crystallization, reducing waste liquid treatment costs by 30%.
2. Low temperature energy-saving process: Develop a 40-50 ℃ low-temperature precipitation system (traditional requires 80 ℃), reduce energy consumption through precise pH control (error ± 0.2), and maintain high product purity (SiO ₂>99%).
4、 Specialized functional development
5、 Continuous and intelligent production
1. Continuous sedimentation throughout the entire process: Design a multi-stage series reactor to achieve continuous operation from raw material mixing, aging to washing, with a 50% increase in production capacity and a standard deviation of particle size distribution ≤ 5nm.
2. Process control: Optimize pH and temperature parameters, adjust flocculant dosage in real-time, and increase product consistency qualification rate to 99.8%.
6、 Development direction
The tire industry focuses on high dispersibility modification (reducing rolling resistance), while the ink field emphasizes precise control of thixotropic structures. The future breakthrough lies in the synergistic design of nano micron pores, achieving a dual leap in adsorption and reinforcement performance.