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Methyltrichlorosilane functionalized silica nanoparticles-treated superhydrophobic cotton for oil–water separation

  • Love Dashairya
  • Dibya Darshan Barik
  • Partha SahaEmail author
Article

Abstract

Water pollution due to oil spills has become a significant concern in recent times for the marine ecosystem. The use of oleophilic/hydrophobic sorbents for oil–water separation has gained a lot of attention as an economical and environment-friendly solution. Herein, we developed a superhydrophobic/superoleophilic cotton by silica nanoparticles (~ 800 nm) treatment followed by surface functionalization with methyltrichlorosilane (MTCS). X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier-transform infrared spectroscopy studies reveal that the formation of pseudo-amorphous SiO2 NPs and a C–Si–O coverage on cotton fiber render it superhydrophobic with increased surface roughness. The MTCS/SiO2-treated cotton exhibited contact angles of ~ 173 ± 2° and 0° on the water–cotton and oil–cotton interface, respectively. Moreover, the MTCS/SiO2-treated cotton demonstrated superhydrophobicity over the entire pH range, with excellent absorption capacities for various oil–water mixtures ranging from ~ 30 to 40 times its weight.

Keywords

Superhydrophobicity Absorption capacity Contact angle Methyltrichlorosilane 

Notes

Acknowledgment

Dr. Partha Saha gratefully acknowledges the financial support received from Department of Science and Technology, Science and Engineering Research Board (DST-SERB) (Grant Number ECR/2016/000959).

Supplementary material

11998_2018_177_MOESM1_ESM.docx (4.4 mb)
Supplementary material 1 (DOCX 4459 kb)

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Copyright information

© American Coatings Association 2019

Authors and Affiliations

  1. 1.Department of Ceramic EngineeringNational Institute of TechnologyRourkelaIndia

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