• A facile, low temperature spray pyrolysed tungsten oxide (WO$_3$): an approach to antifouling coating by amalgamating scratch resistant and water repellent properties

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0281

    • Keywords

       

      Spray pyrolysis; tungsten oxide; scratch hardness; hydrophobic.

    • Abstract

       

      In this study, a facile spray pyrolysed hydrophobic robust tungsten oxide (WO$_3$) films were deposited at an annealing temperature of 400$^{\circ}$C on inexpensive glass substrates, using clear and homogeneous precursor solution containing tungsten hexachloride and 2-methoxyethanol. The 10 and 15 times sprayed films were polycrystalline with the monoclinic crystal structure, uniform with the submicron-sized grain morphology (size $\sim$320–420 nm), with an average surface roughness ranging from 12 to 17 nm and transparent above 60% in the visible region with a thickness of 380 and 550 nm, respectively. Elemental existence of tungsten and oxygen was recognized on the surface of the films possessing the highest lattice oxygen percentage of 91.1. Increment in the scratch hardness of the films with the number of sprays compared to uncoated glass was identified. The films were hydrophilic in nature (water contact angle <8$^{\circ}$), converted to hydrophobic (>120$^{\circ}$) by treating chemically with octadecyltrichlorosilane to form a self-assembled monolayer on the top and the hydrophobicity remained same ($\sim$120$^{\circ}$) even after a year. These films with unique and combined properties of scratch hardness and hydrophobicity can serve in the potential application as antifouling coatings.

    • Author Affiliations

       

      ROBBI VIVEK VARDHAN1 SUBODH KUMAR1 SAUMEN MANDAL1

      1. Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka (NITK), Surathkal 575025, India
    • Dates

       
    • Supplementary Material

       
  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.