title: Synthesis of chitosan capped copper oxide nanoleaves using high intensity (30kHz) ultrasound sonication and their application in antifouling coatings.
abstract: The synthesis of chitosan capped copper oxide nanoleaves (CCCO NLs) was carried out under three different reaction conditions viz. 1) room temperature, 2) 70°C and 3) high intensity ultrasound (30kHz) sonication method and it has been found that the high intensity ultrasound (30kHz) sonication is the best method when compared to other two methods. The advantages of the present synthetic method are: i) easy one step process, ii) lesser reaction time, iii) good yield, iv) reproducible and v) calcination is not required. The resulting chitosan capped copper oxide nanoleaves were characterized by Diffuse Reflectance UV-Visible Spectroscopy (DRS), Fourier Transform Infra-Red Spectroscopy (FT-IR), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM) and Thermo gravimetric analysis (TGA). The CCCO NLs were blended with commercial paints such as polyurethane clear, polyurethane white and acrylic emulsion and applied on to three different surfaces (wood, mild steel and cement slab panels). The hydrophilicity of CCCONP coated panels was analyzed by water contact angle measurement and their antifouling behavior was investigated against three different green and marine algae viz. Arthrospira, Chlorella and Amphora. The antifouling efficiency of the CCCO NLs against the algae was found to be 78-92%.
authors: Department of Inorganic Chemistry, University of Madras, Chennai 600025, India.
authors: Tamilselvan
authors: T
authors: Abiraman
authors: Department of Inorganic Chemistry, University of Madras, Chennai 600025, India.
authors: Ethirajan
authors: E
authors: Ramanathan
authors: CAS in Botany, University of Madras, Chennai 600025, India.
authors: Ganapathy
authors: G
authors: Kavitha
authors: CAS in Botany, University of Madras, Chennai 600025, India.
authors: Ramasamy
authors: R
authors: Rengasamy
authors: Department of Inorganic Chemistry, University of Madras, Chennai 600025, India. Electronic address: bala2010@yahoo.com.
authors: Sengottuvelan
authors: S
authors: Balasubramanian
mesh_terms: D057219:Biofouling / Q000517:prevention & control*; D048271:Chitosan / Q000737:chemistry*; D002708:Chlorella / Q000187:drug effects / Q000254:growth & development; D003300:Copper / Q000737:chemistry* / Q000494:pharmacology*; D049329:Nanostructures / Q000737:chemistry*; D013010:Sonication; D053545:Spirulina / Q000187:drug effects / Q000254:growth & development; D013696:Temperature
chemical_list: D003300:Copper; D048271:Chitosan; C000520:cuprous oxide
keywords: Antifouling; Chitosan; Copper oxide nanoleaves; Green and marine algae; Sonication