Amination of silica nanoparticles using aminobutanol to increase surface reactivity
2022
Wang, Jingyuan | Xing, Shiyong | Xie, Jiuren | Zhao, Shaolei | Gan, Yuxin | Yang, Ling | Wang, Ting-Jie
An effective amination for SiO₂ nanoparticles using aminobutanol to increase surface reactivity was realized via aqueous mixing, spray drying, and thermal treatment. The apparent grafting density of 2-aminobutanol obtained reached to 2.20 nm⁻², with a monomolecular layer. The amino group in aminobutanol acts as a self-catalyst in the amination reaction. The reactivity of SiO₂ particles after amination is obviously increased, which enables the subsequent modification of carboxylic acids more readily, and increases the grafting density of carboxylic acids on the SiO₂ particle surface significantly.
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