Group Coordinator: Alda Simões
The objectives of the research group for the period 2015-2020 include the enhancement of the skills developed during recent years, with new research branches targeted to the strategy of the Research Unit and of the Thematic Area on novel functional materials and aligned with the European Research agenda. The research objectives of the Group can be included in four main domains, described as below:
1. Advanced functional materials and surface engineering for improved durability of metallic parts used in the transportation, energy and construction sectors:
a) Design and fabrication of fault-tolerant anticorrosion coatings for steel, aluminium and magnesium alloys based on thin nanostructured epoxy-silane hybrid coatings, electrodeposited functional coatings, low VOC organic coatings and super-hydrophobic coatings, including selection of suitable adhesion promoters and compatible, effective and non-toxic corrosion inhibitors.
b) Deployment of environmentally-friendly anodising and chemical conversion processes for improved durability of Al and Mg alloys.
c) Development of corrosion sensors for monitoring the integrity of painted surfaces in remote areas of aircrafts.
d) Production of functional nano and microcarriers (capsules, polyelectrolytes, microbeads, porous oxide particles and halloysites) designed for encapsulation or adsorption of corrosion inhibitors, polymer mending species and delivery of chemical functionalities and its incorporation on organic or hybrid matrix for the fabrication of smart and functional coatings for Hi-tech applications.
2. Functional and engineered surfaces for application in the biomedical domain
a) Synthesis and engineering of micro and nanoparticles for drug delivery and/or osteointegration and assessment of their toxicological and cell compatibility effects.
b) Development of innovative surface functionalization strategies for NiTi shape memory alloys and for bioresorbable implants made of Zn and Mg alloys, including development of bio compatible surface treatments and functional coatings (TiO2 tubercles, Zinc nanoflowers, polycaprolactone, chitosan and collagen), its modification with nanoparticles for controlled degradation rate and drug release and enhanced cell proliferation and proteins adhesion.
c) Assessment of the toxicological effects of bio-resorbable implants (Zn and Mg alloys), with focus on the released ions and other chemical species both in vitro and in-vivo tests
3. 3D nanostructured assemblies for advanced redox supercapacitors.
a) High branched 3D dendritic and metallic foam nanostructures of transition metals (Ni, Co and Fe) prepared by eletrodeposition directly on stainless steel collectors and fabrications of a prototype to be tested at pilot scale.
b) Tailoring and characterization of Mn oxides doped with transition metals prepared by electrochemical routes for high efficiency supercapacitor electrodes.
c) Composites of transitionmetallic oxides and hydroxides (including layered double hydroxides) with graphene and graphene oxide for high capacitance and high energy density supercapacitor electrodes in asymmetric configurations.
4. Fundamental Corrosion Studies:
a) Development of tools for localized electrochemical techniques for data collection resolved in space and time.
b) Understanding and modelling of localized corrosion phenomena in metallic parts, with focus on the adhesive/metal interfaces, cut edges, galvanic couples and occluded areas (including under mechanical load) and development of effective corrosion inhibitors tailored for these complex parts.
Venancio, PG; Cottis, RA; Narayanaswamy, R; Fernandes, JCS; “Optical Sensors for Corrosion Detection in Airframes”, Sensors & Actuators: B. Chemical, 182 (2013) 774– 781.
Zomorodian, A; Garcia, MP; Moura e Silva, T; Fernandes,JCS; Fernandes, MH; Montemor, MF; “Corrosion resistance of a composite polymeric coating applied on biodegradable AZ31 magnesium alloy”, Acta Biomaterialia, 9 (2013) 8660-8670
Montemor, MF; Snihirova, DV;Taryba, MG; Lamaka, SV; Kartsonakis, I; Balaskas, A; Kordas, G; Tedim, J; Kuznetsova,A; Zheludkevich, ML; Ferreira, MGS; “Evaluation of self-healing ability in protective coatings modified with combination of nanocontainers filled with corrosion inhibitors“; Electrochim. Acta, 60 (2012) 31-40
Silva, RP; Eugénio, S; Silva, TM; Carmezim, MJ; Montemor, MF; “Fabrication of three-dimensional dendritic Ni-Co films by electrodeposition on stainless steel substrates“, J. Phys. Chem. C 116 (42) (2012), 22425-22431
Bastos, AC; Ferreira, MGS; Simoes, AMP; “The uneven corrosion of deep drawn coil-coatings investigated by EIS“; Electrochim. Acta 56 (2011) 7825-7832
Salgado, JRC; Fernandes, JCS; do Rego, AMB ; Ferraria, AM; Duarte, RG; Ferreira, MGS; “Pt-Ru nanoparticles supported on functionalized carbon as electrocatalysts for the methanol oxidation“, Electrochim. Acta, 56(24) (2011) 8509-8518
Lamaka, SV; Taryba, M; Montemor, MF; Isaacs, HS; Ferreira, MGS; “Quasi-simultaneous measurements of ionic currents by vibrating probe and pH distribution by ion-selective microelectrode“; Electrochemistry Communications 13 (2011) 20-23
Custodio, JV; Agostinho, SML; Simoes, AMP; “Electrochemistry and surface analysis of the effect of benzotriazole on the cut edge corrosion of galvanized steel“; Electrochimica Acta 20 (2010) 5523-5531
Snihirova, D; Lamaka, SV; Taryba, M; Salak, AN; Kallip, S; Zheludkevich, ML; Ferreira, MGS; Montemor, MF;.” Hydroxyapatite microparticles as feed-back active reservoirs of corrosion inhibitors“; ACS Applied Materials & Interfaces. 2 (2010) 3011-3022
Figueira N; Silva TM; Carmezim MJ; Fernandes JCS; “Corrosion Behaviour of NiTi Alloy“, Electrochimica Acta, 54 (3) (2009), 921-926