Isocyanate-modified Nano-SiO2 and Corresponding Process Optimization

2017 2nd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Ye, X.F.^1 ; Huang, X.Y.^1 ; Yu, G.^1 ; Wang, J.N.^1 ; Chen, D.C.^1 ; Hu, H.W.^1 ; Chang, M.L.^1

School of Materials Science and Energy Engineering, Foshan University, Foshan, China^1

关键词: Fourier transform infrared spectrometer;    Graft modification;    Hydrophobic properties;    Modification process;    Optimal processing;    Orthogonal experiment;    Precipitation data;    Triallyl isocyanurate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/229/1/012023/pdf
DOI  :  10.1088/1757-899X/229/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Nano-SiO2is hydrophilic, and the surface of nano-SiO2should be modified to improve its dispersion in a polymer matrix. Here, triallyl isocyanurate was selected to modify the surface of the nano-SiO2powders. Because the reaction between isocyanate groups (-NCO) and hydroxyl groups (-OH) on surface of the nano-SiO2does not need any pre-treatment, one single and simple step can facilitate the graft. By optimizing the specific modification process via orthogonal experiments, optimal processing conditions that yield good graft modification effects are obtained. This enhances the lipophilicity of the nano-SiO2. The Fourier-transform infrared spectrometer (FTIR) results indicate that the isocyanate groups (-NCO) in triallyl isocyanurate and the hydroxyl groups (-OH) on surface of the nano-SiO2undergo a chemical reaction. Further, the precipitation data show that modified nano-SiO2is well dispersed in the organic phase, and its hydrophobic property is strong. This fulfills the goal of modifying nano-SiO2powders.