Suspension Flame Spray Construction of Porous Polycaprolactone/Hydroxyapatite Coatings for Marine Ecological Remediation

Porous polycaprolactone (PCL)/hydroxyapatite (HA) composite coatings are deposited via suspension flame spraying for marine ecological remediation. The morphology, phase composition, chemical composition, and surface roughness are characterized by scanning electron microscopy, x-ray diffraction, Fourier transform infrared spectroscopy, and 3D optical profiler. The PCL/HA coatings exhibit porous structure, and the porosity is controlled through adjusting the content of HA. The microalgae attachment performances of Chlorella on the surface of 316L stainless steel substrate and the PCL/HA coatings are investigated. The PCL/HA coatings effectively increase the attachment ratio of Chlorella ; after 7 days of incubation, the adhesion ratio is up to 69.8%. The porous structure of the PCL/HA coatings plays a significant role in promoting the attachment of microalgae, which has a valuable application in marine ecological remediation area.