采用硅烷偶联剂KH-570在酸性条件下对纳米SiO2表面进行改性,并对改性前后的纳米SiO2采用粒径分析仪、傅里叶红外变换光谱仪、紫外-可见光光谱仪、扫描电镜等仪器进行了分析和表征。结果表明,硅烷偶联剂KH-570能成功地对纳米SiO2表面进行改性,使其表面化学键合了硅烷偶联剂的有机官能团,降低了颗粒团聚程度,提高了纳米SiO2在有机介质中的分散程度
The surface of nano-SiO2 particles was modified with silane coupling agent 3-(methacryloyloxy) propyltrimethoxysilane(KH-570) under acidic conditions.Particle size analyzer,Fourier transform infrared spectroscopy(FTIR),ultraviolet visible spectrometer,and scanning electron microscopy(SEM) were adopted to characterize and analyze the unmodified and modified nano-SiO2 particles.The results indicate that silane coupling agent KH-570 successfully modifies the nano-SiO2 particles with its organic functional groups chemically bonded on the surface of nano-SiO2.As a result,the surface modification reduces the particles' aggregation and improves the dispersion in organic solvent.
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