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Super protective anti-bacterial coating development with silica-titania nano core-shells
Jaya Verma1, A S Khanna2, Rachana Sahney3
1Amity Institute of Nanotechnology, Amity University Noida Uttar Pradesh-201303 India jayaverma123@yahoo.com.
Nanoscale Advances
|September 22, 2022
Summary
Researchers developed a novel marine antifouling paint using silica-titania core-shell nanoparticles. This coating offers enhanced mechanical strength and effective antibacterial properties against common bacteria.
Area of Science:
- Materials Science
- Nanotechnology
- Corrosion Science
Background:
- Marine biofouling is a significant issue, leading to increased fuel consumption and maintenance costs for vessels.
- Existing antifouling paints often face environmental concerns or limited durability.
- Developing robust, eco-friendlier antifouling solutions is crucial for the maritime industry.
Purpose of the Study:
- To synthesize and characterize silica, titania, and silica-titania core-shell nanoparticles.
- To incorporate these nanoparticles into coating formulations for marine antifouling applications.
- To evaluate the antibacterial efficacy and mechanical properties of the developed coatings.
Main Methods:
- Nanoparticles synthesized using sol-gel and peptization methods.
- Characterization via DLS, UV-Vis, XRD, SEM, EDX, TEM, and XPS.
- Coating formulations prepared with polyurethane and poly-acrylic binders.
- Antibacterial tests against Escherichia coli and Bacillus.
- Mechanical testing including scratch, adhesion, impact, and flexibility tests.
Main Results:
- Silica-titania core-shell nanoparticles combined silica's strength with TiO2's antimicrobial properties.
- Coatings with 4% (wt) silica-titania core-shell nanoparticles (peptization process) showed optimal antibacterial activity.
- The polyurethane-based coating demonstrated excellent adhesion, impact resistance, and flexibility.
- Satisfactory anti-corrosion performance was observed for the developed coating.
Conclusions:
- Silica-titania core-shell nanoparticles are effective in enhancing marine antifouling paint.
- The developed coating offers a promising combination of mechanical robustness and antibacterial functionality.
- This research contributes to the development of advanced, protective marine coatings.
