纳米SiO2颗粒对油水分离滤纸性能的影响

Effect of Nano-SiO2 Particles on Oil-water Separation Performance of Filter Paper

关键词:  纳米SiO₂颗粒  油水分离  滤纸  静态接触角

Key Words:nano- SiO₂ particle  oil-water separation  filter paper  static contact angle

摘要:本研究以正硅酸乙酯（TEOS）和甲基三乙氧基硅烷（MTES）为前驱体，采用溶胶 凝胶法制备出表面带有疏水基团甲基（—CH3）的纳米SiO₂颗粒。将制备的纳米SiO₂颗粒与阳离子苯丙乳液共混浸渍滤纸，制备出一种油水分离滤纸。实验通过改变TEOS和MTES的配比制备出不同的纳米SiO₂颗粒，探讨了不同的纳米SiO₂颗粒对油水分离滤纸的表面微观结构、静态接触角和油水分离效率的影响。研究结果表明，当TEOS与MTES配比为4∶3的纳米SiO₂颗粒用量为1.0%时，油水分离滤纸对水的静态接触角达到148.4°，对十六烷和水的混合油品的分离效率达到99.8%。此时，油水分离滤纸的透气度相比于仅用乳液浸渍的滤纸下降了7.7%。

Abstract:In this study， tetraethyl orthosilicate(TEOS） and methyltriethoxysilane(MTES） were used as precursors to prepare nano- SiO₂ with hydrophobic group—CH3 on the surface by sol-gel method. The prepared nano- SiO₂ and the cationic styrene-acrylic emulsion were blended and impregnate filter paper to prepare an oil-water separation filter paper. Different nano- SiO₂ particles were prepared by changing the ratio of TEOS and MTES. The effects of different nano- SiO₂ particles on the surface microstructure， static contact angle and oil-water separation efficiency of oil-water separation filter paper were investigated. The results showed that when the nano- SiO₂ particles prepared based on TEOS∶MTES ratio of 4∶3 dosage was 1.0%， the static contact angle of the oil-water separation filter paper to water reached 148.4°， the mixture of hexadecane and water separation efficiency reached 99.8%, compared to the emulsion-impregnated filters the permeability of the oil-water separation filter paper decreased by 7.7%.