Article
Chemistry, Multidisciplinary
Michael Arkas, Konstantinos Giannakopoulos, Evangelos P. Favvas, Sergios Papageorgiou, George V. Theodorakopoulos, Artemis Giannoulatou, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Efthalia Georgiou, Ioannis Pashalidis
Summary: Two different silica conformations, xerogels and nanoparticles, were tested for uranyl cation sorption at low pHs using dendritic poly (ethylene imine) as a mediator. The study investigated the effect of factors such as temperature, electrostatic forces, adsorbent composition, pollutant accessibility, and organic matrix properties to determine the optimal formulation for water purification. Through various techniques including spectroscopy, light scattering, porosimetry, TGA, and SEM, the results showed that both adsorbents exhibited extraordinary sorption capacities. Xerogels were cost-effective and could be used to create composite purification devices.
Article
Engineering, Environmental
Liang Ying Ee, Sean Yi Rong Chia, Kai Xue, Sze Yuet Chin, Chloe A. Hae Cho, Xin Yi Tan, Sam Fong Yau Li
Summary: The functionalization of cellulose nanocrystals with amino-polyol allows for efficient removal of potentially toxic electroneutral and small boron species in water. This nanomaterial exhibits high boron uptake capacity, ultrafast kinetics, and excellent removal performance, making it a promising candidate for various water purification and desalination applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Ioannis Ioannidis, Ioannis Pashalidis, Michael Arkas
Summary: The binding of actinide ions (Am(III) and U(VI)) in aqueous solutions by hybrid silica-hyperbranched poly(ethylene imine) nanoparticles (NPs) and xerogels (XGs) has been studied. The results show that both materials have high removal efficiency for both Am(III) and U(VI) ions, with the xerogels showing higher efficiency. Furthermore, increasing temperature favors the adsorption process.
Article
Chemistry, Physical
Younes Ahmadi, Ki-Hyun Kim
Summary: Effective control of environmental pollutants is crucial for managing environmental systems. Hyper branched polymers (HPs) have been recognized for their potential as adsorbents for mitigating environmental pollutants. This review highlights the recent progress in designing and constructing HPs with high adsorption potentials. The review focuses on adsorption mechanisms, functionalization methods, the role of functional groups, and the choice of HPs for adsorption. It evaluates the efficiency of pollutant removal through adsorption and compares the performance of HPs with other systems. The review also highlights the potential of new materials and their preparation/modification methods for constructing efficient adsorbing systems. Finally, the advantages and limitations of adsorbing systems are described, along with the existing challenges, to provide guidelines for future research.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Irene M. Manning, Nick Guan Pin Chew, Haley P. Macdonald, Kelsey E. Miller, Mark J. Strynar, Orlando Coronell, Frank A. Leibfarth
Summary: In this study, a novel polymer network material with a synergistic combination of ionic and fluorous components was reported for the efficient removal of anionic PFAS from water. The material showed significant removal efficiency for 21 legacy and emerging PFAS and could be regenerated for multiple cycles of use.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Environmental Sciences
Vahid Vatanpour, Maryam Jouyandeh, Hossein Akhi, Seyed Soroush Mousavi Khadem, Mohammad Reza Ganjali, Hiresh Moradi, Somayeh Mirsadeghi, Alireza Badiei, Amin Esmaeili, Navid Rabiee, Sajjad Habibzadeh, Ismail Koyuncu, Sasan Nouranian, Krzysztof Formela, Mohammad Reza Saeb
Summary: In this study, PEI-SiO2/PSF nanocomposite membranes were prepared using nonsolvent-induced phase separation. The results showed that PEI-SiO2 nanoparticles were uniformly dispersed in the PSF-based membranes, leading to a decrease in water contact angle and improvements in fouling resistance and permeability.
Article
Polymer Science
Wouter Vogel, Maruti Hegde, Andrew N. Keith, Sergei S. Sheiko, Theo J. Dingemans
Summary: The study presents a synthetic route towards phenylethynyl-functionalized hyperbranched PAEKs with high T-g, which can be cross-linked to form flexible films with good mechanical properties, offering a new solution to the issues of low T-g and processing challenges in PAEKs.
Article
Polymer Science
Songyi Li, Yihua Cui, Jingjing Li
Summary: By synthesizing thiol-terminated hyperbranched polymer (T-HBP) and introducing it into the photosensitive resin system, the volume shrinkage of the DLP 3D printing resin can be significantly reduced, while also improving impact strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Jianjian Sun, Yujuan Jin, Bo Wang, Huafeng Tian, Kaier Kang, Shuang Men, Yunxuan Weng
Summary: Long-chain hyperbranched polymers (LCHBPs) were successfully synthesized by grafting stearic acid onto hyperbranched polyesters (HBPE), leading to improved mechanical properties when blended with polylactic acid (PLA) at a certain ratio.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Applied
M. Arkas, M. Douloudi, E. Nikoli, G. Karountzou, I Kitsou, E. Kavetsou, D. Korres, S. Vouyiouka, A. Tsetsekou, K. Giannakopoulos, M. Papageorgiou
Summary: In this study, silver nanoparticles were synthesized using PEI as a template and immobilized on silica substrates to create hybrid nanocatalysts. The effects of different PEIs and pH regulators were investigated, and the catalytic performance was improved through organic scaffold pyrolysis. This eco-friendly synthesis procedure proved to be a successful alternative for producing multifunctional nanomaterials at ambient temperature.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Biochemical Research Methods
Yao Luo, Guoyi Yu, Fei Liu, Yanwen Feng, Pei Zhao, Jun Yue
Summary: The nontraditional intrinsic fluorescence (NTIF) of polymers containing heteroatoms has been studied for label-free bioimaging applications. Hyper-branched polyureas (aBPUs) with different degrees of branching (DBs) or different modifications were synthesized to investigate their NTIF properties. The results showed that aBPUs exhibited obvious NTIF phenomenon and the NTIF enhanced with the increase of DBs. Chemical modifications and the formation of nanoassembly also affected the NTIF performances.
BIOCONJUGATE CHEMISTRY
(2022)
Review
Energy & Fuels
Ying Zhang, Weichu Yu
Summary: This paper provides an overview of the synthesis methods of hyperbranched polymers, analyzing the advantages and disadvantages of different methods. Furthermore, it describes the research progress of hyperbranched polymers in oilfield chemistry and discusses their application advantages and existing problems in various areas. Finally, it forecasts the application prospects of hyperbranched polymers in drilling, oil recovery, and gathering and transportation chemistry.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Polymer Science
You Wu, Yujuan Jin, Jian Huang, Huafeng Tian, Yunxuan Weng
Summary: The experiment synthesized Phenyl terminated hyperbranched polyesters (HBP-Bs) for toughening poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) directly by melt blending. It was found that adding HBP-Bs significantly decreased the crystallinity, increased impact strength and elongation at break of the PHBV blends, and improved the microstructure of the blends.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Michael Arkas, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, Ioannis Pashalidis, Theodora Katsika, Eleni Nikoli, Rafael Panagiotopoulos, Anna Fotopoulou, Michail Vardavoulias, Marilina Douloudi
Summary: Radially polymerized dendritic compounds are a unique polymer category with adjustable internal cavities and external groups, making them ideal for applications in water purification and other environmentally friendly practices.
Article
Polymer Science
Jiahui Zhou, Yi Yan, Yue Zhang, Yufan Zhang, Desuo Zhang, Hong Lin, Yuyue Chen, Bing Zhao, Jiaqing Xiong
Summary: This paper presents a facile approach toward high-efficient antibacterial polypropylene spunbonded nonwoven fabrics, which are decorated by a composite of graphene oxide embedded with silver nanoparticles. The treated fabrics exhibited excellent antibacterial activities, promising important potential for biomedical and personal protection applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Dentistry, Oral Surgery & Medicine
Emmanouil Chatzipetros, Zafeiroula Yfanti, Panos Christopoulos, Catherine Donta, Spyros Damaskos, Evangelos Tsiambas, Dimitris Tsiourvas, Eleni-Marina Kalogirou, Konstantinos Tosios, Kostas Tsiklakis
CLINICAL ORAL INVESTIGATIONS
(2020)
Article
Chemistry, Physical
C. Kyrou, D. Tsiourvas, S. Kralj, I Lelidis
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Pharmacology & Pharmacy
Venturina Stagni, Archontia Kaminari, Zili Sideratou, Elias Sakellis, Spiros A. Vlahopoulos, Dimitris Tsiourvas
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2020)
Review
Chemistry, Multidisciplinary
Marilina Douloudi, Eleni Nikoli, Theodora Katsika, Michalis Vardavoulias, Michael Arkas
Summary: With the rapid evolution of nanoscience, there is a growing interest in novel nanomaterials with combinatory features. Hybrid composites offer simple, budget-conscious solutions that can cater to multiple needs while being applicable in a wide range of nanotechnology-related studies.
Article
Materials Science, Multidisciplinary
Michail Vardavoulias, Paraskevi Gkomoza, Michael Arkas, Dimitrios K. Niakolas, Stylianos G. Neophytides
Summary: The paper aims to manufacture free-standing solid oxide cells through the atmospheric plasma spray process, with a five-layered cell fabricated using crushed YSZ powder and NiO powder obtained by flame spray oxidation of pure nickel. The purpose of spraying transition layers was to facilitate ionic motion and eliminate thermal expansion mismatches. Various layers were separately tested for permeability, with electrodes achieving adequate porosity and thick YSZ electrolyte layers found to be impermeable to acetone.
Article
Chemistry, Medicinal
Archontia Kaminari, Eleni Nikoli, Alexandros Athanasopoulos, Elias Sakellis, Zili Sideratou, Dimitris Tsiourvas
Summary: The study focused on enhancing the capability of carbon dots (CDs) to transport through cell membranes and target mitochondria, utilizing nitrogen-doped CDs. Through functionalization, precise mitochondrial targeting was achieved while maintaining non-toxicity and biocompatibility. These designed CDs showed selective internalization in cells and cell mitochondria with high transmembrane potential, leading to preferential uptake in malignant cells compared to normal cells.
Article
Multidisciplinary Sciences
Michael Arkas, Marilina Douloudi, Michail Vardavoulias, Theodora Katsika
Summary: An overview of the chemical compounds forming the rare smectic T phases is provided, along with references to the historical context. The thermodynamics and factors contributing to the adoption of tetragonal scaffolds are discussed, as well as characteristic optical microscopy textures and X-ray diffraction patterns. Furthermore, a comparison of geometrical parameters with other two-dimensional and three-dimensional organizations is performed.
Review
Chemistry, Multidisciplinary
Michael Arkas, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, Ioannis Pashalidis, Theodora Katsika, Eleni Nikoli, Rafael Panagiotopoulos, Anna Fotopoulou, Michail Vardavoulias, Marilina Douloudi
Summary: Radially polymerized dendritic compounds are a unique polymer category with adjustable internal cavities and external groups, making them ideal for applications in water purification and other environmentally friendly practices.
Article
Multidisciplinary Sciences
Michael Arkas, Marilina Douloudi, Eleni Nikoli, Georgia Karountzou, Ioanna Kitsou, Eleni Kavetsou, Dimitrios Korres, Stamatina Vouyiouka, Athena Tsetsekou, Konstantinos Giannakopoulos, Michaela Papageorgiou
Summary: Silica-organic matrix-silver nano-catalysts were synthesized and characterized in this study. Kinetic studies were conducted to optimize the preparation of eco composites.
Review
Chemistry, Multidisciplinary
Efthalia Georgiou, Grigorios Raptopoulos, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, Michael Arkas, Patrina Paraskevopoulou, Ioannis Pashalidis
Summary: Aerogels are lightweight, nanoporous materials that have diverse applications and have been included in the top ten emerging technologies in chemistry for 2022. This review discusses the use of aerogel-based adsorbents for uranium removal and recovery and the factors affecting their adsorption efficiency and mechanism. The adsorbents show high sorption capacity for hexavalent uranium and follow Langmuir isotherm and pseudo-second-order kinetic models. Spectroscopic studies indicate the formation of inner-sphere complexes between surface active moieties and the uranyl cation. Aerogel-based adsorbents have potential in water treatment and uranium recovery, but further developments are needed to improve their selectivity for uranyl moieties.
Review
Pharmacology & Pharmacy
Michael Arkas, Michail Vardavoulias, Georgia Kythreoti, Dimitrios A. Giannakoudakis
Summary: Radially polymerized bio-dendrimers and hyperbranched polymers have been proven to have great potential in medical applications, particularly in interacting with cell regenerative mechanisms. They are non-toxic or exhibit very low toxicity, allowing for unhindered cell proliferation and making them ideal materials for tissue engineering scaffolds. Their resemblance to proteins enables the synthesis of derivatives that imitate collagen, elastin, or biomimetic hydroxy apatite. Dendritic polymers with their distinctive architecture can serve various functions, such as hosting cell differentiation genes, providing antimicrobial protection, modifying cell surface chemistry, and inducing polymer cross-linking for healing wounds in different tissues.
Article
Chemistry, Multidisciplinary
Amit Kumar Singh, Dimitrios A. A. Giannakoudakis, Michael Arkas, Konstantinos S. S. Triantafyllidis, Vaishakh Nair
Summary: In this study, composites of bismuth oxyhalide nanoparticles and lignin-based biochar were synthesized for the photocatalytic and adsorptive remediation of methyl orange dye (MO). The optimized conditions achieved 100% degradation of MO after 60 minutes of light exposure. The incorporation of biochar enhanced the photocatalytic performance of the BiOCl photocatalyst, making it a promising and eco-friendly nanomaterial for wastewater treatment.
Article
Chemistry, Multidisciplinary
Michael Arkas, Konstantinos Giannakopoulos, Evangelos P. Favvas, Sergios Papageorgiou, George V. Theodorakopoulos, Artemis Giannoulatou, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Efthalia Georgiou, Ioannis Pashalidis
Summary: Two different silica conformations, xerogels and nanoparticles, were tested for uranyl cation sorption at low pHs using dendritic poly (ethylene imine) as a mediator. The study investigated the effect of factors such as temperature, electrostatic forces, adsorbent composition, pollutant accessibility, and organic matrix properties to determine the optimal formulation for water purification. Through various techniques including spectroscopy, light scattering, porosimetry, TGA, and SEM, the results showed that both adsorbents exhibited extraordinary sorption capacities. Xerogels were cost-effective and could be used to create composite purification devices.
Article
Polymer Science
Michael Arkas, Theofanis Bompotis, Konstantinos Giannakopoulos, Evangelos P. Favvas, Marina Arvanitopoulou, Konstantinos Arvanitopoulos, Labros Arvanitopoulos, Georgia Kythreoti, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Laura Castellsagues, Sara Maria Soto Gonzalez
Summary: Leathers from different animals were treated with dispersions containing hydrophilic composite silica-hyperbranched poly(ethylene imine) xerogels, and the antimicrobial activity was introduced. The gel precursor solutions were infused before gelation to titanium oxide powders for self-cleaning properties. The dispersion of these biomimetically premade xerogels integrated environmentally friendly materials with short coating times, and the performance of the treated leathers was evaluated.
Article
Polymer Science
Ioannis Ioannidis, Ioannis Pashalidis, Michael Arkas
Summary: The binding of actinide ions (Am(III) and U(VI)) in aqueous solutions by hybrid silica-hyperbranched poly(ethylene imine) nanoparticles (NPs) and xerogels (XGs) has been studied. The results show that both materials have high removal efficiency for both Am(III) and U(VI) ions, with the xerogels showing higher efficiency. Furthermore, increasing temperature favors the adsorption process.
