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Effect of Nano-SiO2 Particles on Oil-water Separation Performance of Filter Paper
  
DOI：10.11980/j.issn.0254-508X.2019.02.003
Key Words:nano- SiO2 particle  oil-water separation  filter paper  static contact angle
Author NameAffiliation
CHEN Huaquan State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
SI Jinghang State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
ZHOU Xuesong* State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
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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%.
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