研究目的
To improve the dispersity and stability of nano-SiO2 aqueous system with high solid content by synthesizing a polyacrylic acid dispersant with methoxysilicon end groups (KH590-PAA) through photopolymerization.
研究成果
The KH590-PAA dispersant synthesized by photopolymerization significantly improves the dispersity and stability of nano-SiO2 aqueous systems. The dispersion properties are closely related to the content and molecular weight of KH590-PAA, with optimal results achieved at 1.0 wt% content and a molecular weight of 16,000 g/mol.
研究不足
The study focuses on the dispersion properties of nano-SiO2 in aqueous systems with high solid content, but the practical application might be limited by the specific conditions required for the photopolymerization synthesis and the dispersion process.
1：Experimental Design and Method Selection:
The study involved the synthesis of KH590-PAA by photopolymerization of acrylic acid (AA) initiated with (3-mercaptopropyl)trimethoxysilane (KH-590). The dispersion properties of nano-SiO2 aqueous system were then evaluated.
2：0). The dispersion properties of nano-SiO2 aqueous system were then evaluated.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Nano-SiO2 nanoparticles with specific surface area of 400 m2/g and particle size less than 40 nm were used.
3：List of Experimental Equipment and Materials:
Included rotational viscometer, inverted bottle method, conductivity meter, dynamic light scattering (DLS), scanning electron microscope (SEM), and transmission electron microscope (TEM).
4：Experimental Procedures and Operational Workflow:
The synthesis of KH590-PAA, preparation of nano-SiO2 aqueous dispersion system, measurement of viscosity and curing time, and characterization of dispersion properties.
5：Data Analysis Methods:
The adsorption capacity, particle size, and zeta potential of nanoparticles were analyzed to understand the dispersion mechanism.
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