Biofouling studies on nanoparticle-based metal oxide coatings on glass coupons exposed to marine environment.
Titania, niobia and silica coatings, derived from their respective nanoparticle dispersions or sols and fabricated on soda lime glass substrates were subjected to field testing in marine environment for antimacrofouling applications for marine optical instruments. Settlement and enumeration of macrofouling organisms like barnacles, hydroides and oysters on these nanoparticle-based metal oxide coatings subjected to different heat treatments up to 400 degrees C were periodically monitored for a period of 15 days. The differences observed in the antifouling behaviour between the coated and uncoated substrates are discussed based on the solar ultraviolet light induced photocatalytic activities as well as hydrophilicities of the coatings in case of titania and niobia coatings and the inherent hydrophilicity in the case of silica coating. The effect of heat treatment on the photocatalytic activity of the coatings is also discussed.
Dineshram
R
R
National Institute of Ocean Technology, Velachery-Tambaram main road, Pallikaranai, Chennai 600100, India.
Subasri
R
R
Somaraju
K R C
KR
Jayaraj
K
K
Vedaprakash
L
L
Ratnam
Krupa
K
Joshi
S V
SV
Venkatesan
R
R
D000268:Adhesiveness / Q000528:radiation effects; D000818:Animals; D018441:Biofilms / Q000254:growth & development / Q000528:radiation effects; D057219:Biofouling; D017610:Calcium Compounds / Q000737:chemistry; D002384:Catalysis / Q000528:radiation effects; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D015169:Colony Count, Microbial; D005898:Glass / Q000737:chemistry*; D006358:Hot Temperature; D008386:Marine Biology; D008670:Metals / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010125:Ostreidae / Q000502:physiology; D010087:Oxides / Q000737:chemistry*; D011208:Powders; D012623:Seawater / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D013057:Spectrum Analysis; D001468:Thoracica / Q000502:physiology; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
D017610:Calcium Compounds; D020099:Coated Materials, Biocompatible; D008670:Metals; D010087:Oxides; D011208:Powders; D014867:Water; C009495:titanium dioxide; C004569:soda lime; D012972:Sodium Hydroxide; D014025:Titanium