A. C. Patsidis

A. C. Patsidis

University of Patras

H-index: 13

Europe-Greece

Professor Information

University

University of Patras

Position

Department of Materials Science Greece

Citations(all)

713

Citations(since 2016)

372

Cited By

482

hIndex(all)

13

hIndex(since 2016)

12

i10Index(all)

16

i10Index(since 2016)

16

Email

University Profile Page

University of Patras

Research & Interests List

Smart Materials

nanocomposites

nanodielectrics

functionality

energy storage

Professor FAQs

What is A. C. Patsidis's h-index at University of Patras?

The h-index of A. C. Patsidis has been 12 since 2016 and 13 in total.

What are A. C. Patsidis's research interests?

The research interests of A. C. Patsidis are: Smart Materials, nanocomposites, nanodielectrics, functionality, energy storage

What is A. C. Patsidis's total number of citations?

A. C. Patsidis has 713 citations in total.

Top articles of A. C. Patsidis

Basic Principles of Dielectrics

Dielectrics are non‐conductive materials which can be polarized under the influence of an external electric field. They are categorized as polar and non‐polar, and the resulting polarization includes contributions from both permanent and induced dipoles. Polarizability is a microscopic quantity indicating the ability of atoms, molecules, or even groups to be polarized. Types of polarizability/polarization are– electronic, atomic/ionic, orientational, and space charge (interfacial). The determination of the local field within a dielectric material is a critical and non‐trivial theme. Dielectric permittivity expresses the ability for charge and energy storage and depends on molecular structure, temperature, and field frequency (under ac field). The relaxation processes occurring in dielectrics are related to the attempt of various types of dipoles to be aligned with the field. Active dielectrics are materials …

Authors

Anastasios Chr Patsidis,Georgios Chr Psarras

Journal

High Temperature Polymer Dielectrics: Fundamentals and Applications in Power Equipment

Publish By

Wiley‐VCH GmbH

Publish Date

2024/3/4

Sustainable self‐curing epoxy adhesives from Chios natural Mastic (Pistacia lentiscus L.)

This study outlines a method for the epoxidation of poly‐beta‐myrcene, a biopolymer that can be easily extracted from the natural resin of the Chios Mastic tree (Pistacia lentiscus L.). The resulting epoxidation products are self‐curing, and have a nearly 100% green carbon content. These Mastic Epoxide products (MASTEP) have the potential to be useful thermosetting resins. One specific product (MASTEP A), was used as an adhesive to create Single Lap Joints, which were then subjected to tensile shear stress tests. MASTEP A was found to be 25%–83% stronger than three commonly used conventional or “semi‐green” epoxy adhesives. Another specific product (MASTEP B), was found able to be thermally converted into a semi‐crystalline form. In order to clarify the 3D chemical structure of MASTEP, IR, and DSC investigations were conducted. The entire production process was designed to be environmentally …

Authors

Dimitrios E Anastasiou,Anastasios C Patsidis,Aikaterini K Andreopoulou

Journal

Journal of Applied Polymer Science

Publish By

John Wiley & Sons, Inc.

Publish Date

2023/9/5

End-Of-Use Fly Ash as an Effective Reinforcing Filler in Green Polymer Composites

The aim of this study is to use fly ash powder in an environmentally friendly matrix, in a novel way, addressing environmental and disposal problems. Fly ash/epoxy composites were prepared and studied varying the filler content. An investigation of structural and morphological characteristics was conducted using of X-ray diffraction patterns and scanning electron microscopy images, which revealed the successful fabrication of composites. Thermomechanical properties were studied via dynamic mechanical analysis and static mechanical tests. The composites exhibited an improved mechanical response. Broadband dielectric spectroscopy was used to investigate the dielectric response of the composite systems over the frequency range from 10−1 to 107 Hz and the temperature range from 30 to 160 °C. The analysis revealed the presence of three relaxation processes in the spectra of the tested systems. Interfacial polarization, the glass-to-rubber transition of the polymer matrix, and the rearrangement of polar side groups along the polymer chain are the processes that occur under a descending relaxation time. It was found that dielectric permittivity increases with filler content. Finally, the influence of filler content and the applied voltage under dc conditions was analyzed to determine the ability of the composites to store and retrieve electric energy. Fly ash improved the efficiency of the storing/retrieving energy of the composites.

Authors

Anastasios C Patsidis,Manolis Souliotis

Journal

Polymers

Publish By

MDPI

Publish Date

2023/8/16

Epoxy-Silicon Composite Materials from End-of-Life Photovoltaic Panels

The prospect of using recovered solar cells from end-of-life (EoL) photovoltaic panels (PVPs) to produce composite materials with dielectric properties was studied. The main goal of this research was to reduce the waste originating from EoL PVPs by reusing the semiconductor, thus rendering solar energy an even greener energy source. Solar cells were recovered from EoL PVPs through thermal treatment to remove polymer sheets and screening to separate the solar cells from glass and electrodes. Composite materials were manufactured by reinforcing two different epoxy resins, Araldite LY556 and Resoltech 1050, with varying concentrations of ground solar cells (0–10% w/w). The mechanical and dielectric properties of the composite materials were examined with bending and shearing tests and Broadband Dielectric Spectroscopy (BDS), respectively. The responses from the two different resin matrices were …

Authors

C Pavlopoulos,A Christoula,AC Patsidis,D Semitekolos,K Papadopoulou,GC Psarras,L Zoumpoulakis,G Lyberatos

Journal

Waste and Biomass Valorization

Publish By

Springer Netherlands

Publish Date

2023/10

Multifunctional Performance of Hybrid SrFe12O19/BaTiO3/Epoxy Resin Nanocomposites

Polymer matrix nanocomposites are widely studied because of the versatility of their physical and mechanical properties. When these properties are present simultaneously, responding at relative stimuli, multifunctional performance is achieved. In this study, hybrid nanocomposites of SrFe12O19 and BaTiO3 ceramic particles dispersed in an epoxy resin matrix were fabricated and characterized. The content of SrFe12O19 was varying, while the amount of BaTiO3 was kept constant. The successful fabrication of the nanocomposites and the fine dispersion of the ceramic particles was verified via the morphological and structural characterization carried out with X-ray Diffraction patterns and Scanning Electron Microscopy images. Dielectric response and related relaxation phenomena were studied by means of Broadband Dielectric Spectroscopy. Dielectric permittivity augments with filler content, while the recorded relaxations, with descending relaxation time, are: (i) interfacial polarization, (ii) glass-to-rubber transition, (iii) intermediate dipolar effect, and (iv) re-orientation of polar-side groups of the main polymer chain. SrFe12O19 nanoparticles induce magnetic properties to the nanocomposites, which alter with the magnetic filler content. Static and dynamic mechanical response improves with filler content. Thermogravimetric analysis shown that ceramic particles are beneficial to the nanocomposites’ thermal stability. Glass transition temperature, determined via Differential Scanning Calorimetry, was found to slightly vary with filler content, in accordance with the results from dynamic mechanical and dielectric analysis, indicating the effect of …

Authors

Georgia C Manika,Sevasti Gioti,Aikaterini Sanida,Georgios N Mathioudakis,Anxhela Abazi,Thanassis Speliotis,Anastasios C Patsidis,Georgios C Psarras

Journal

Polymers

Publish By

MDPI

Publish Date

2022/11/9

Multitasking Performance of Fe3O4/BaTiO3/Epoxy Resin Hybrid Nanocomposites

In this study, hybrid nanocomposites consisting of Fe3O4/BaTiO3/epoxy resin were prepared with varying amounts of filer content. Structural and morphological characterization, conducted via X-Ray Diffraction patterns and Scanning Electron Microscopy images, revealed the successful fabrication of composites and fine dispersion of inclusions. Thermomechanical properties are studied via Differential Scanning Calorimetry, Thermogravimetric Analysis, Dynamic Mechanical Analysis and static mechanical tests. Hybrid composites exhibit enhanced thermal stability and improved mechanical response. Indicatively, Young’s modulus, tensile strength and fracture toughness increase from 1.26 GPa, 22.25 MPa, and 3.03 kJ/m3 for the neat epoxy to 1.39 GPa, 45.73 MPa, and 41.08 kJ/m3 for the composites with 20 or 15 parts per hundred resin per mass (phr) of Fe3O4, respectively. Electrical behavior is investigated via Broadband Dielectric Spectroscopy and ac conductivity measurements. The real part of dielectric permittivity reaches the value of 11.11 at 30 °C for the composite with 40 phr of Fe3O4. The ability to store and retrieve electric energy on the nanocomposites is examined with the following parameters: the filler content and the applied voltage under dc conditions. Retrieved energy reaches 79.23% of the stored one, for the system with 15 phr of Fe3O4. Magnetic response is studied via a Vibrating Sample Magnetometer. Magnetic saturation, for the system with the highest magnetic filler content, obtains the value of 25.38 Am2/kg, while pure magnetic powder attains the value of 86.75 Am2/kg. Finally, the multifunctional performance of the …

Authors

Sevasti Gioti,Aikaterini Sanida,Georgios N Mathioudakis,Anastasios C Patsidis,Thanassis Speliotis,Georgios C Psarras

Journal

Materials

Publish By

MDPI

Publish Date

2022/2/26

Multitasking Performance of Fe3O4/BaTiO3/Epoxy Resin Hybrid Nanocomposites. Materials 2022, 15, 1784

In this study, hybrid nanocomposites consisting of Fe3O4/BaTiO3/epoxy resin were prepared with varying amounts of filer content. Structural and morphological characterization, conducted via X-Ray Diffraction patterns and Scanning Electron Microscopy images, revealed the successful fabrication of composites and fine dispersion of inclusions. Thermomechanical properties are studied via Differential Scanning Calorimetry, Thermogravimetric Analysis, Dynamic Mechanical Analysis and static mechanical tests. Hybrid composites exhibit enhanced thermal stability and improved mechanical response. Indicatively, Young’s modulus, tensile strength and fracture toughness increase from 1.26 GPa, 22.25 MPa, and 3.03 kJ/m3 for the neat epoxy to 1.39 GPa, 45.73 MPa, and 41.08 kJ/m3 for the composites with 20 or 15 parts per hundred resin per mass (phr) of Fe3O4, respectively. Electrical behavior is investigated via Broadband Dielectric Spectroscopy and ac conductivity measurements. The real part of dielectric permittivity reaches the value of 11.11 at 30◦ C for the composite with 40 phr of Fe3O4. The ability to store and retrieve electric energy on the nanocomposites is examined with the following parameters: the filler content and the applied voltage under dc conditions. Retrieved energy reaches 79.23% of the stored one, for the system with 15 phr of Fe3O4. Magnetic response is studied via a Vibrating Sample Magnetometer. Magnetic saturation, for the system with the highest magnetic filler content, obtains the value of 25.38 Am2/kg, while pure magnetic powder attains the value of 86.75 Am2/kg. Finally, the multifunctional performance of the …

Authors

S Gioti,A Sanida,GN Mathioudakis,AC Patsidis,T Speliotis,GC Psarras

Publish By

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Publish Date

2022

Epoxy-based/BaTiO3 nanodielectrics: Relaxation dynamics, charge transport and energy storage

Epoxy/BaTiO3 nanocomposites developed at low nanofiller concentrations with their dielectric relaxations, charge transport dynamics and capacitive energy storage were investigated via dielectric spectroscopy and dc charge-discharge experiments. Two relaxation processes were observed, namely the α- and β-relaxations, attributed to the dynamic Tg process and local motions, respectively. Another process located at low frequencies and high temperatures was identified as interfacial polarization. The charge transport properties were examined via the ac conductivity and impedance formalisms, indicating a beneficial effect with the increase of the nanofiller content. The dc conductivity was calculated from the ac spectra and exhibited Arrhenius temperature dependence. The theoretical energy density was found to increase up to 3.5 times comparing to the neat epoxy resin, highlighting the reinforcing dielectric …

Authors

Stavros X Drakopoulos,Anastasios C Patsidis,Georgios C Psarras

Journal

Materials Research Bulletin

Publish By

Pergamon

Publish Date

2022/1/1

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