Dimitris Baltzis

• Materials Engineer, MSc
• Engineer at University of Ioannina

We study the effect of introducing different carbon fillers in epoxy, i.e. milled carbon (MC) and carbon nano tubes (CNTs), either separately or combined to produce binary and ternary composites with tailored material. The waterinduced degradation was assessed in relation to the employed carbonaceous filler. All specimens were immersed in water unt...

Featured Application This work was focused on the modification of the epoxy matrix so as to produce nanocomposites with enhanced electrical and mechanical properties. With respect to the specific application, these nanocomposites may be employed independently or as matrices for multi-functional composite materials employed in various sectors such a...

We report the synthesis of controlled sized Urea-formaldehyde (UF) microcapsules containing an epoxy healing agent via in situ emulsification polymerization for the study of self-healing epoxy systems. Scanning Electron Microscopy (SEM) confirmed that the capsules possessed rough external surface which enhanced mechanical interlocking. Differential...

In this work, the development of a planar interdigital capacitive sensor, directly onto the surface of a composite, for determining the initial quality of curing of bonded composite joints and assessing their long-term durability is presented. The sensor consisted of an interlocking comb-shaped array of silver electrodes and used to monitor the pro...

In the presented research effort, cyclic polarization tests were conducted coupled with acoustic emission measurements, in order to monitor the corrosion phenomena. Previous studies have shown that epoxy composite coatings offer satisfactory corrosion protection to aluminum substrates minimizing and even eliminating some degradation phenomena. I...

The following study, is focused on developing a ternary epoxy based composite material by the combined inclusion of two types of carbon fillers. The selected fillers (i.e. multi-walled carbon nano-tubes, MWCNTs and carbon black, CB), were dispersed using high speed shear mixing while the effect of dispersion duration, filler type and weight content...

Acoustic Emission (AE) technique was employed in potentiodynamic cyclic polarization measurements so as to explore the applicability of AE in Aluminum corrosion monitoring

In the present effort, aluminum 2024-T6 substrates were used as potentiodynamic measurement specimens in cyclic polarization tests. Acoustic emission (AE) was employed in order to correlate the corrosion phenomena taking place with characteristic AE signal descriptors. AE detected signals due to hydrogen bubble related processes during cathodic pol...

Adhesive bonding repair is potentially a cost effective for repairing off shore and underwater marine structures such as underwater pipelines. In such applications steel and Nickel alloys are the most widely used choices. The main use of Invar, a Nickel based alloy, is in cryogenic environments because of it is approximately zero thermalexpansion c...

The scope of this study is the real-time monitoring and evaluation of the healing process using novel testing procedures and non-destructive evaluation techniques. In this work, the healing approach that has been followed is that of the intrinsic Diels–Alder (DA) and retro-DA mechanism. Two polymers were used as adhesives in single lap-joint specim...

The scope of this work is to improve properties like electrical conductivity and durability of an aerospace grade epoxy resin by developing novel hybrid ternary nano-composites. Mul-ti Wall Carbon Nano-Tubes (MWCNTs) and Carbon Black (CB), were dispersed in the epoxy using a dissolver machine in various per weight ratios and total filler content. N...

The aim of this work is the study of the electrochemical and mechanical behaviour of stainless steel (SS304) adhesively bonded with carbon nanotube (CNT)-reinforced epoxies to either SS304 or carbon-reinforced composites substrates. For metal to metal (MtM) joints, the shear strength of nano-reinforced adhesives was studied using single lap shear s...

Self-healing materials are attracting increasing interest of the research community, over the last decades, due to their efficiency in detecting and "autonomically" healing damage. Numerous attempts are being presented every year focusing on the development of different self-healing systems as well as their integration to large scale production wit...

4th International Conference of Engineering Against Failure (ICEAF IV) 24-26 June 2015, Skiathos, Greece. Adhesive bonding repair is potentially a cost effective for repairing off shore and underwater marine structures such as underwater pipelines. Moreover, when composite materials are employed as bonded patches, the tailoring of the composite to...

4th International Conference of Engineering Against Failure (ICEAF IV) 24-26 June 2015, Skiathos, Greece. The addition of multi wall carbon nanotubes (MWCNTs) in epoxy resins, results in nano-modified composites with enhanced properties like shear strength and stiffness. In addition, the modified epoxy resin, when used as a protective layer, can mi...

Photoabsorbing CdSe semiconductive thin films were prepared by cathodic electrodeposition onto titanium substrates from an acidic aqueous electrolytic bath, containing some selected, commercially available organic salts as additives, specifically monosodium l-glutamate and choline chloride. The products obtained were fully characterized with XRD an...