Abstract
We report the formation of encapsulated graphene oxide/polystyrene (GO/PS) containers via Pickering emulsion polymerization of oil-in-water emulsions stabilized by GO sheets. Without further functionalization, the as-synthesized GO sheets were used for emulsion stabilization to minimize the process step. A one-step process was developed to encapsulate 8-Hydroxyquinoline (8-HQ) in GO/PS containers. FT-IR study confirmed the encapsulation. The inhibiting effect of 8-HQ was found to affect the kinetics of the emulsion polymerization and shift the polymerization temperature to a higher value. A detailed study of stability, size, and morphology of encapsulated containers (PS/GO) was carried out as a function of GO-to-oil ratio and oil volume fraction in the formulation, to optimize the process parameters. A possible mechanism for the formation of GO/PS containers at various GO-to-oil ratios was discussed. The corrosion inhibition performance of 8-HQ-encapsulated containers was studied in an epoxy coating. These encapsulated containers induced long-term anticorrosive property to the coating. The use of cost-effective materials and a scalable method used in this work can be utilized to prepare environmentally friendly coatings for large-area applications.
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Acknowledgements
This work was supported by the financial assistance from the Industrial Research and Consultancy Center (IRCC), IIT Bombay. The authors acknowledge access to the experimental facilities at Centre for Research in Nanotechnology & Science (CRNTS), IIT Bombay.
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Daradmare, S., Pradhan, M., Raja, V.S. et al. Encapsulating 8-hydroxyquinoline in graphene oxide-stabilized polystyrene containers and its anticorrosion performance. J Mater Sci 51, 10262–10277 (2016). https://doi.org/10.1007/s10853-016-0254-4
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DOI: https://doi.org/10.1007/s10853-016-0254-4