Hanyang University · Materials Science
Professor Daewon Sohn's research lab specializes in the development and application of functional nanomaterials, particularly halloysite nanotubes (HNTs), for advanced coating technologies. The lab focuses on tailoring the surface and pore structure of HNTs through pH- and chemical-based treatments to enable controlled release of corrosion inhibitors. A key research direction involves enhancing the performance of polyurethane (PU) coatings by encapsulating sensitive corrosion inhibitors, such as 2-mercaptobenzimidazole and 2-mercapatobenzothiazole, while preventing their premature reaction with diisocyanate. The lab also investigates the tunable porosity and dispersion behavior of HNTs to optimize their use in multifunctional, environmentally friendly coatings.
Figures are computed from collected data and may differ slightly.
Aggregation and dispersion behaviours of halloysite nanotubes (HNTs) were influenced by pH. The meso- and micro-porosity of halloysite were determined by N2 gas physisorption. The blocking and opening of halloysite nanotube pores with acid, neutral, and base treatment were detected in a micro- and mesoporous matrix of tunable porosity. The inner pores of HNTs were opened with base treatment, but were closed with acid or neutral treatment.
The present work focuses on enhancing the anti-corrosive performance of multi-functional PU coatings by encapsulation of the commercial inhibitors 2-mercaptobenzimidazole & 2-mercapatobenzothiozole, despite their reaction with diisocyanate.
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