Halloysite Nanotube as Multifunctional Component in Epoxy Protective Coating

Abstract

The current research explores the use of halloysite nanotube as a multifunctional filler in epoxy coating for carbon steel. Epoxy monomer loaded halloysite was incorporated into epoxy coating along with amine hardener immobilized mesoporous silica. The waterproofing, self-healing, anticorrosive abilities, and stability under weathering of the coating were evaluated. The halloysite nanotubes are able to impart better waterproofing property to the coating. The released epoxy monomer encapsulated inside the halloysite cavity upon reaction with amine curing agent immobilized in mesoporous silica recovers the damage and thereby facilitates self-healing in epoxy coating. Apart from offering healing ability to the coating, the halloysite nanotubes are able to protect the coatings for a longer period from severe weathering conditions.

Development and Properties of Polymeric Nanocomposite Coatings

“…The most reported potential nanocontainers to host corrosion inhibitors are titanium dioxide nanotubes (TNTs) [26,27], mesoporous silica nanotubes (MSNTs) [28], and halloysite nanotubes (HNTs) [29]. Yuanchao et al [16] evaluated the corrosion resistance performance of benzotriazole as corrosion inhibitor by loading it inside hollow silica particles and corrosion inhibitor was released in response to pH changes in the electrolyte.…”

“…Yuanchao et al [16] evaluated the corrosion resistance performance of benzotriazole as corrosion inhibitor by loading it inside hollow silica particles and corrosion inhibitor was released in response to pH changes in the electrolyte. Poornima et al [29] used halloysite nanocontainers to encapsulate the epoxy monomer and studied the self-healing and corrosion behavior of the HNT’s doped epoxy coatings. Kinetics of releasing of corrosion inhibitors loaded within halloysite lumen was also studied by Lvov et al [30].…”

A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs

“…are used as reservoirs for corrosion inhibitors or healing agents. The self-healing ability of TiO 2 and hallyosite nanotubes were studied and previously reported [25,26].…”

Selection of Wear Resistive Nano coating in En8 Steel

“…The advantage of this method is uniform distribution of nano particles, reduction of waste materials [25], and high hardness heat resistance due to nano particles [26]. Few nano composite materials like Al2O3, TiO2, SiC [27][28][29][30][31][32][33][34][35] Ni-WC [36] etc., are coated using this method. Pulse current deposition method is a type of electro deposition method through which tribological properties are enhanced [37].…”