4.7 Article

Polyurethane films modified with polyaniline-zinc oxide nanocomposites for biofouling mitigation

Journal

CHEMICAL ENGINEERING JOURNAL
Volume 359, Issue -, Pages 1400-1410

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.11.038

Keywords

Antifouling; Polyurethane; Polyaniline-ZnO nanocomposite; Passive technology

Funding

  1. Department of Science and Technology, Govt. of India [DST/KIRAN/SoRF-PM/022/2015]
  2. UGC-UPE-Phase-II, Govt. of India

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Eco-friendly antifouling coatings are considered to be superior alternatives over conventional biocidal agents that affect marine life adversely. Considering this fact, polyurethane (PU) films modified with a novel pigment [Polyaniline-Zinc oxide (PANI-ZnO) nanocomposites, 1-2% w/w] and phytic acid as a chelating dopant have been developed. The structure has been elucidated using Infrared Spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and the surface properties of the films were explored by using atomic force microscopy, contact angle measurements, and swelling ratios. PANI-ZnO nanocomposite particles conferred excellent chemical, mechanical and thermal properties to the PU films. The antifouling properties of the modified PU films were tested against marine bacteria (Gram negative: Vibrio harveyi and Gram positive: Bacillus licheniformis) both qualitatively and quantitatively (80 to 12% for V. harveyi and 75 to 20% for B. licheniformis). In-vitro studies displayed good antifouling performance of the modified PU-PANI-ZnO films. The present study offers a simple, moreover a passive (green) technology that allows restoration of submerged surfaces with minimal detrimental effect on marine flora and fauna.

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