Article
Chemistry, Multidisciplinary
Mathilde Laird, Niklas Herrmann, Naseem Ramsahye, Cedric Totee, Carole Carcel, Masafumi Unno, John R. Bartlett, Michel Wong Chi Man
Summary: This study reports an unprecedented, single isomer styryl-functionalized T-18 POSS, which has been unambiguously identified among nine possible isomers using multinuclear solution NMR, MALDI-MS, FTIR, and computational studies. A ring-strain model was developed to predict the speciation of non-equivalent Si atoms in other T-n compounds, demonstrating its general applicability and usefulness for predicting Si-atom environments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Wenyuan Zhang, Zijian Zheng, Jianfeng Huang, Zhaohong Shen, Boyou Hou, Meiyu Ji, Wenchao Zhang, Zhaolu Qin, Rongjie Yang
Summary: By combining boron nitride and polyhedral oligomeric silsesquioxane, researchers prepared an iron-containing polyhedral oligomeric silsesquioxane assembly that showed improved thermal conductivity, reduced dielectric constant, decreased heat release rate, and enhanced flame retardancy in epoxy composites.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Tughan Akbasak, Mehmet Kodal, Olcay Mert, Gueralp Ozkoc
Summary: Researchers are seeking alternative hydrophobic coatings to replace fluorinated chemicals, and polyhedral oligomeric silsesquioxanes (POSS) show potential as environmentally friendly candidates. In this study, hydrophobic cotton and polyester surfaces were created by anchoring Octavinyl POSS (OL-POSS) and Aminopropylisobutyl POSS (AM-POSS) using a one-step dip-coating technique. The use of ultraviolet (UV) radiation with Benzoyl Peroxide (BPO) initiator increased surface roughness and hydrophobicity. The findings suggest that 5% POSS coatings can provide similar or better water absorption duration (WAD) values compared to fluorinated chemicals.
Article
Engineering, Chemical
Yu-Jie Shen, Qing-Ran Kong, Li-Feng Fang, Ze-Lin Qiu, Bao-Ku Zhu
Summary: In this study, a molecular deposition strategy was designed to construct a high-performance nanochannel separation layer for selective separation of small molecules. The use of multifunctional molecules resulted in the creation of a robust and highly permeable composite membrane, which demonstrated excellent stability and rejection of antibiotics. This novel and green strategy provides an efficient way to separate molecules and salt using nanochannel composite membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Haixiang Song, Qiqi Zhang, Yanwei Zhang, Yanfei Wang, Zhongyuan Zhou, Ping Zhang, Bingnan Yuan
Summary: The influence of 3-amino-polyhedral oligomeric silsesquioxane (NH2-POSS) on waterborne polyurethanes (WPU) was studied by synthesizing NH2-POSS modified WPUs. The addition of NH2-POSS improved the dispersion stability and thermal stability of WPU, while also enhancing hydrophobic properties.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Polymer Science
Zhiwen Wu, Junhan Lu, Mingquan Jiang, Yi Chen, Jun Mai, Ruifen Lin, Hui Wang, Jikang Zhang
Summary: This study developed a new cross-linking composite by combining polyhedral oligomeric silsesquioxane (POSS) functionalized with isocyanate groups and epoxy resin (EP) containing phenolic hydroxyl groups. The addition of POSS improved the thermal and moisture resistance of the epoxy resin composite, increased the glass transition temperature, and reduced water absorption and dielectric loss. These modified epoxy composites have great potential for applications in electronic packaging.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Liberata Guadagno, Andrea Sorrentino, Raffaele Longo, Marialuigia Raimondo
Summary: In this study, a tetrafunctional epoxy resin loaded with different types of POSS compounds and multi-walled carbon nanotubes (CNTs) was used to formulate multifunctional structural nanocomposites for aeronautic and aerospace applications. The combination of nanoscale incorporations of CNTs with POSS resulted in nanohybrids that displayed desired properties, such as good electrical, flame-retardant, mechanical, and thermal properties. The presence of hydrogen bonding-based intermolecular interactions between the nanofillers played a strategic role in imparting multifunctionality to the nanohybrids. The TUNA technique confirmed the good dispersion of CNTs within the epoxy resin, and the combined action of POSS with CNTs enhanced the self-healing efficiency of the nanocomposites.
Article
Chemistry, Multidisciplinary
Kunal Mishra, Raman P. Singh
Summary: Polyhedral oligomeric silsesquioxane (POSS) is a nanoscale reinforcement that can modify the mechanical, thermal, and chemical properties of thermosetting polymers, such as epoxy resin systems. The inclusion of POSS in epoxy resin at higher loading introduces ductility in the fracture behavior of nanocomposites. The J-integral is used to quantify the fracture behavior and characterizes the crack growth resistance curve. Different nanocomposites are prepared by adding varying amounts of glycidyl POSS into DGEBF epoxy resin, and the fracture toughness experiments show that the addition of POSS improves crack initiation toughness and changes the failure behavior due to the development of POSS-POSS compliant domains. The increase in fracture resistance at higher POSS loading is due to shear yielding, while the increased fracture toughness at lower POSS loading is due to crack pinning and deflection.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Mayu Nagao, Taihei Hayashi, Hiroaki Imoto, Kensuke Naka
Summary: Dumbbell-shaped polyhedral oligomeric silsesquioxane (POSS) derivatives with unsymmetrical structures exhibit hybrid properties in solubility and thermal behavior, showing potential to improve the thermal degradation performance of compounds.
Article
Electrochemistry
Devaney Ribeiro do Carmo, Murilo Santos Peixoto, Alexsandro dos Santos Felipe, Valmor Roberto Mastelaro, Fernanda dos Santos Franco
Summary: In this study, a polyhedral oligomeric silsesquioxanes (POSS) modified with zinc and ferrocyanide was prepared to create an electroactive nanohybrid material (SZnH) for developing an electrochemical sensor to detect isoniazid. The SZnH-modified graphite paste electrode (GPSZn) demonstrated high sensitivity to isoniazid concentrations, with two linear response ranges from 1.0 x 10(-5) to 1.0 x 10(-3) mol l(-1).
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
T. Li, Y. Sun, H. Y. Dai, J. Chen, R. Z. Xue, D. W. Liu, M. M. Wang
Summary: A series of PI/POSS hybrid films with low dielectric constants and excellent comprehensive properties have been successfully prepared by incorporating different proportions of POSS into the polyimide precursors. An appropriate amount of POSS doping can effectively improve the optical and dielectric properties, while excessive doping can reduce dielectric properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Magdalena Lipinska
Summary: The effects of POSS nanoparticles on the properties of biodegradable poly(epsilon-caprolactone) (PCL) were studied. It was found that amine-POSS and Gly-POSS enhanced the mechanical properties of PCL, while HO-POSS facilitated crystallization. TGA analysis showed that the thermal stability of PCL decreased when HO-POSS and Gly-POSS were added.
Article
Chemistry, Applied
Zuzanna Buchwald, Mariusz Szolyga, Joanna Zwolinska, Bogdan Marciniec, Adam Voelkel
Summary: The remineralizing potential of hydroxyapatite has led to its use in dental composites. However, the compatibility between hydroxyapatite and organic compounds is insufficient, resulting in low mechanical properties. Polyhedral oligomeric silsesquioxanes show promise as additives to dental composites, and their modification of hydroxyapatite surfaces improves mechanical properties and reduces water sensitivity.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Applied
Juna Chen, Tengfei Liu, Xin Zhang, Yishan Jiang, Feng Xiao, Wen Li, Xianming Wang, Shougang Chen
Summary: In this study, polyhedral oligomeric silsesquioxane (POSS) was covalently grafted on a 2D covalent organic framework to enhance the corrosion and wear resistance of epoxy coating. The results demonstrated that the addition of POSS improved the hydrophobicity of the coating and exhibited excellent anti-corrosion and wear resistance properties. The study suggests that incorporating 2D-COF with POSS could lead to the development of advanced composite coatings.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Ruirui Zhou, Lijie Lin, Birong Zeng, Xindan Yi, Chenyu Huang, Kunpeng Du, Xiaohui Liu, Yiting Xu, Conghui Yuan, Lizong Dai
Summary: The DOPO-containing diblock copolymer poly(HAMA(m)-b-HEPOMA(n)) was synthesized and grafted with Ti-POSS to obtain PolyTi. The PolyTi was used as a macromolecular flame retardant to modify epoxy resin materials, resulting in improved thermal stability, flame retardancy, and resistance to migration.
Article
Materials Science, Composites
Martin Donnay, Spiros Tzavalas, Emmanuel Logakis
COMPOSITES SCIENCE AND TECHNOLOGY
(2015)
Article
Engineering, Electrical & Electronic
Emmanuel Logakis, Lorenz Herrmann, Thomas Christen
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2016)
Article
Engineering, Electrical & Electronic
Hossein Ghorbani, Thomas Christen, Martin Carlen, Emmanuel Logakis, Lorenz Herrmann, Henrik Hillborg, Linnea Petersson, Julia Viertel
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2017)
Article
Chemistry, Physical
D. Domingues, E. Logakis, A. A. Skordos
Article
Materials Science, Composites
E. Logakis, E. Pollatos, Ch. Pandis, V. Peoglos, I. Zuburtikudis, C. G. Delides, A. Vatalis, M. Gjoka, E. Syskakis, K. Viras, P. Pissis
COMPOSITES SCIENCE AND TECHNOLOGY
(2010)
Article
Materials Science, Composites
E. Logakis, Ch Pandis, P. Pissis, J. Pionteck, P. Poetschke
COMPOSITES SCIENCE AND TECHNOLOGY
(2011)
Article
Polymer Science
Ch. Pandis, E. Logakis, A. Kyritsis, P. Pissis, V. V. Vodnik, E. Dzunuzovic, J. M. Nedeljkovic, V. Djokovic, J. C. Rodriguez Hernandez, J. L. Gomez Ribelles
EUROPEAN POLYMER JOURNAL
(2011)
Article
Polymer Science
P. Jyotishkumar, Emmanuel Logakis, Sajeev Martin George, Juergen Pionteck, Liane Haeussler, Ruediger Hassler, Polycarpos Pissis, Sabu Thomas
JOURNAL OF APPLIED POLYMER SCIENCE
(2013)
Article
Polymer Science
E. Ivanov, R. Kotsilkova, E. Krusteva, E. Logakis, A. Kyritsis, P. Pissis, C. Silvestre, D. Duraccio, M. Pezzuto
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2011)
Article
Polymer Science
Matej Micusik, Maria Omastova, Juergen Pionteck, Christos Pandis, Emmanuel Logakis, Polycarpos Pissis
POLYMERS FOR ADVANCED TECHNOLOGIES
(2011)
Proceedings Paper
Engineering, Electrical & Electronic
A. Krivda, U. Straumann, M. Martinon, E. Logakis, F. Tsang, M. Narendran
2014 IEEE CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA (CEIDP)
(2014)
Proceedings Paper
Engineering, Electrical & Electronic
Emmanuel Logakis, Linnea Petersson, Julia Viertel
PROCEEDINGS OF THE 2013 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2013), VOLS 1 AND 2
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
Thomas Christen, Emmanuel Logakis
PROCEEDINGS OF THE 2013 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2013), VOLS 1 AND 2
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
R. Gremaud, M. Bjelogrlic, M. Schneider, E. Logakis, Ch. Schlegel, S. Fursich, A. Krivda, T. Christen
PROCEEDINGS OF THE 2013 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2013), VOLS 1 AND 2
(2013)
Meeting Abstract
Chemistry, Multidisciplinary
Chau Hon Ho, Spiros Tzavalas, Emmanuel Logakis
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2012)