Article
Chemistry, Physical
Panpan Guan, Jianlong Lei, Yecheng Zou, Yongming Zhang
Summary: The addition of Ti3C2Tx filler into the SSC PFSA membrane significantly enhances proton conductivity, reduces hydrogen permeation, and improves thermo-mechanical properties, making the composite membrane a potential material for PEM fuel cells operating above the water boiling temperature.
Article
Chemistry, Physical
Yohanes Antonius Hugo, Wiebrand Kout, Antoni Forner-Cuenca, Zandrie Borneman, Kitty Nijmeijer
Summary: The ion exchange membrane is a key component of a hydrogen-bromine flow battery (HBFB) and research has been conducted on membranes with different SSC PFSA/PVDF ratios, with short and long-term testing showing that higher SSC PFSA loading improves proton conductivity but increases bromine species crossover.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Nana Zhao, Zhiqing Shi, Francois Girard
Summary: Optimizing the ionomer materials in the catalyst layers is crucial for improving the performance of proton exchange membrane fuel cells. Short-side-chain PFSA polymer performs better than long-side-chain PFSA polymer, especially at high temperature and low humidity conditions. Using advanced ionomers in the catalyst layers can lead to more noticeable improvements in cell performance.
Article
Engineering, Chemical
Santiago P. Fernandez Bordin, Heber E. Andrada, Alejo C. Carreras, Gustavo Castellano, Ralf Schweins, Gabriel J. Cuello, Claudia Mondelli, Victor M. Galvan Josa
Summary: Fuel cells play a strategic role in the global energy system, with a particular focus on eco-cars to reduce CO2 emissions. This study examines the characteristics of commercial polymeric proton exchange membranes using techniques such as small angle neutron scattering for optimization.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Tao Luo, Yanjun Zhong, Dehua Xu, Xinlong Wang, Matthias Wessling
Summary: Different methods were used to evaluate the transport selectivity of cations in ion exchange membranes, and it was found that considering the cation activity coefficients is crucial for interpreting the membrane transport properties.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Anna V. Parshina, Ekaterina Yu. Safronova, Svetlana A. Novikova, Nastasia Stretton, Anastasia S. Yelnikova, Timur R. Zhuchkov, Olga V. Bobreshova, Andrey B. Yaroslavtsev, Yuri Kulvelis, Oleg N. Primachenko
Summary: The development of accessible express methods to determine markers of viral diseases in saliva is currently an actual problem. Novel cross-sensitive sensors based on Donnan potential with bio-comparable perfluorosulfonic acid membranes for the determination of salivary viral markers (N- acetyl-L-methionine, L-carnitine, and L-lysine) were proposed. The varying of the sorption and transport properties of perfluorosulfonic acid membranes provided a change in the distribution of the sensor sensitivity to N-acetyl-L-methionine, L-carnitine, and L-lysine ions, which was necessary for multisensory system development.
Article
Chemistry, Multidisciplinary
Qingyang Xu, Liangwei Ma, Xiaohan Lin, Qiaochun Wang, Xiang Ma
Summary: Pure organic room-temperature phosphorescence (RTP) materials have been achieved by copolymerizing iminostilbene and its analogues with acrylamide. The study shows that the growth of alkane chain in monomers enhances the lifetime and photoluminescence quantum yield of RTP emission, and polymers with larger conjugated structures exhibit longer RTP emission wavelengths.
CHINESE CHEMICAL LETTERS
(2022)
Review
Biochemistry & Molecular Biology
Ekaterina Yu. Safronova, Anna A. Lysova, Daria Yu. Voropaeva, Andrey B. Yaroslavtsev
Summary: Polymer ion-exchange membranes have a wide range of applications, including gas and liquid separation, concentration and purification, chemical and electrochemical synthesis, and hydrogen power generation. Perfluorosulfonic acid (PFSA) membranes, known for their optimal combination of properties, are commonly used in fuel cell development. However, their low conductivity at low humidity and high temperature limits their application. This review focuses on the modification approaches that can create materials with different functional properties.
Article
Chemistry, Physical
Zhi Hong Cai, Xue Lang Gao, Wei Ting Gao, Yvonne Shuen Lann Choo, Jia Jun Wang, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu
Summary: In recent years, the continuous application of superacid-catalyzed condensation reactions has led to the development of anion exchange membranes (AEMs) with excellent performance. One widely discussed method is the copolymerization of two aromatic compounds with piperidone via a superacid-catalyzed reaction to synthesize anionic conducting copolymers. Among them, the poly(N-alkylcarbazole-co-terphenyl N,N '-dimethylpiperidinium) (PCTP-n) membranes exhibit high dimensional stability, alkaline resistance, mechanical robustness, and OH- conductivity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Panpan Guan, Jianlong Lei, Xundao Liu, Kangwei Xu, Supeng Pei, Han Ding, Yecheng Zou, Wei Feng, Feng Liu, Yongming Zhang
Summary: The property of perfluorinated sulfonic acid (PFSA) membranes is influenced by ion exchange capacity (IEC), chemical structure of functional side-chain, and phase-separation morphology. Proton conductivity of short side-chain (SSC) PFSA membrane is higher than that of long side-chain (LSC) PFSA membrane, owing to higher ratio of bound-to-free water. Furthermore, SSC membrane exhibits better self-assembly of side chains, smaller domain spacing between ionic clusters, and improved ionic channel connectivity, contributing to its enhanced proton conductivity.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Narayanaswamy Kamatham, Olzhas A. Ibraikulov, Pablo Durand, Jing Wang, Olivier Boyron, Benoit Heinrich, Thomas Heiser, Patrick Leveque, Nicolas Leclerc, Stephane Mery
Summary: This study reports the impact of functionalizing four different semiconducting polymer structures with linear siloxane-terminated side-chains, showing that the substitution of alkyl chains with siloxane chains significantly influences the properties of the polymers. The increase in pi-stacking overlap of the polymer backbones leads to enhanced charge mobility values. Additionally, different siloxane chains have distinct effects on the polymer structure.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Polymer Science
Carlos Corona-Garcia, Alejandro Onchi, Arlette A. Santiago, Araceli Martinez, Daniella Esperanza Pacheco-Catalan, Ismeli Alfonso, Joel Vargas
Summary: This study focused on developing partially renewable aromatic-aliphatic polyamides using oleic acid as a renewable source and investigating their properties for proton exchange membranes. The results demonstrated that adjusting the feed molar ratio of the diamines effectively tailored the degree of sulfonation of the materials, leading to a polymer membrane with a proton conductivity of 1.55 mS cm(-1) at 30℃ after activation.
Article
Chemistry, Physical
Yutong Fan, Jinyue Zhou, Junjie Chen, Chunhui Shen, Shanjun Gao
Summary: Recently, the development of high-performance and durable anion exchange membranes for fuel cells has been prioritized. In this study, polyaryl piperidine anion exchange membranes with hydrophilic side chains were synthesized via a superacid-catalyzed Friedel-Crafts reaction. The membranes exhibited a distinct microphase separation structure between the hydrophilic side chain and hydrophobic main chain. The introduction of the hydrophilic side chain improved the ionic conductivity and alkaline resistance of the membranes, as indicated by their higher conductivity and lower weight loss after alkaline treatment compared to membranes without the hydrophilic side chain.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Vasily T. Lebedev, Yuri V. Kulvelis, Alexandr V. Shvidchenko, Oleg N. Primachenko, Alexei S. Odinokov, Elena A. Marinenko, Alexander I. Kuklin, Oleksandr I. Ivankov
Summary: This study aimed to design and investigate proton-conducting membranes by modifying Aquivion(R)-type material with detonation nanodiamonds. The modification of the membranes with hydrogen-saturated nanodiamonds was found to significantly enhance the proton conductivity. The variations in diamond properties allowed for improvements in the composite structure and ion conductivity.
Article
Chemistry, Multidisciplinary
Zitang Wei, Xiaokang Wang, Bumjoon Seo, Xuyi Luo, Qixuan Hu, Jack Jones, Matthias Zeller, Kang Wang, Brett M. Savoie, Kejie Zhao, Letian Dou
Summary: This study conducted a systematic investigation into the side chain functionalization of the bis(indandione) derivative system, successfully achieving the production of high molecular weight and stereoregular single crystalline polymers. By precisely engineering the side chains, topochemical reactivity was maintained and the elastic modulus of the resulting polymer single crystals was greatly enhanced. Additionally, insoluble polymer single crystals were processed into robust free-standing thin films using ultrasonication.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Vasily T. Lebedev, Yury Kulvelis, Georgiy S. Peters, Olga Bolshakova, Svetlana Sarantseva, Maria Popova, Alexander Ya Vul
Summary: Development of carbon-based structures composed of nanoparticles with different types of orbital hybridization of carbon (sp(2), sp(3)) allows for the creation of new substances with advanced biomedical properties, luminescent, and magnetic characteristics when modified by lanthanides for applications in Photodynamic Therapy or Magneto-Resonance Imaging. These complexes show promising stability and low toxicity in biological cells, making them prospective biomedical materials.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2022)
Article
Polymer Science
Oleg N. Primachenko, Yuri Kulvelis, Elena A. Marinenko, Iosif Gofman, Vasily T. Lebedev, Svetlana Kononova, Alexander Kuklin, Oleksandr I. Ivankov, Dmytro Soloviov, Alexis Chenneviere
Summary: The Aquivion (R)-type perfluorinated proton conducting membranes can have their electrochemical and physical-chemical properties regulated by the method of orientational stretching, resulting in increased proton conductivity.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Vasily T. Lebedev, Gyula Torok, Yury Kulvelis, Olga Bolshkova, Natalia P. Yevlampieva, Marina A. Soroka, Eduard Fomin, Alexander Ya Vul, Seema Garg
Summary: The recent study focuses on the synthesis, structure, and physicochemical properties of complexes based on detonation nanodiamonds modified with metal-organic molecules, showing potential medical applications due to their magnetic and fluorescent properties.
Article
Biochemistry & Molecular Biology
Oleg N. Primachenko, Yuri Kulvelis, Alexei S. Odinokov, Nadezhda Glebova, Anna O. Krasnova, Lev A. Antokolskiy, Andrey A. Nechitailov, Alexander Shvidchenko, Iosif Gofman, Elena A. Marinenko, Natalia P. Yevlampieva, Vasily T. Lebedev, Alexander Kuklin
Summary: Compositional proton-conducting membranes based on perfluorinated Aquivion(R)-type copolymers modified by detonation nanodiamonds (DND) showed improved performance in hydrogen fuel cells, with higher operational stability, lower proton resistance, and higher current densities at elevated temperatures.
Article
Materials Science, Multidisciplinary
Alexander M. Panich, Moti Salti, Aleksandr E. Aleksenskii, Yuri Kulvelis, Anastasia Chizhikova, Alexander Ya Vul', Alexander Shames
Summary: We conducted a study on the preparation, NMR, and MRI of suspensions of detonation nanodiamonds (DNDs) with manganese ions grafted to their surfaces. The manganese-grafted DNDs were found to have potential as contrast agents for MRI, as proven by the comparison of various parameters with Gd-grafted DNDs and Dotarem.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Physics, Condensed Matter
V. T. Lebedev, Yu. V. Kulvelis, M. A. Soroka, O. A. Kyzyma, A. Ya. Vul
Summary: Binary and ternary complexes of europium fullerenes and diphthalocyanines with detonation nanodiamonds have been obtained for the first time, which can serve as platforms for the delivery of these hydrophobic molecules into aqueous biological media for magnetic resonance imaging, photodynamic therapy, and diagnostics using luminescent labels.
JOURNAL OF SURFACE INVESTIGATION
(2023)
Article
Pharmacology & Pharmacy
Olga Bolshakova, Vasily Lebedev, Elena Mikhailova, Olga Zherebyateva, Liliya Aznabaeva, Vladimir Burdakov, Yuri Kulvelis, Natalia Yevlampieva, Andrey Mironov, Igor Miroshnichenko, Svetlana Sarantseva
Summary: Carbon nanoparticles with antimicrobial properties, such as fullerenes, have limitations in medical use due to their insolubility in water. To enhance their action, new water-soluble complexes containing C60 fullerene, detonation nanodiamonds, and polyvinylpyrrolidone were created. The three-component complex C60+AC960+PVP showed the most stable and pronounced inhibitory effect.
Article
Biochemistry & Molecular Biology
Alexandr V. Shvidchenko, Alexei S. Odinokov, Oleg N. Primachenko, Iosif V. Gofman, Natalia P. Yevlampieva, Elena A. Marinenko, Vasily T. Lebedev, Alexander I. Kuklin, Yuri V. Kulvelis
Summary: Aquivion (R)-type perfluorosulfonic acid membranes with modified sulfonated nanodiamond particles showed improved proton conductivity and mechanical properties. The presence of nanodiamonds did not disrupt the basic structural elements and conducting channels in the membranes. These compositional membranes have potential applications in hydrogen fuel cells for enhanced performance.
Article
Biochemistry & Molecular Biology
Vasily T. Lebedev, Yuri V. Kulvelis, Alexandr V. Shvidchenko, Oleg N. Primachenko, Alexei S. Odinokov, Elena A. Marinenko, Alexander I. Kuklin, Oleksandr I. Ivankov
Summary: This study aimed to design and investigate proton-conducting membranes by modifying Aquivion(R)-type material with detonation nanodiamonds. The modification of the membranes with hydrogen-saturated nanodiamonds was found to significantly enhance the proton conductivity. The variations in diamond properties allowed for improvements in the composite structure and ion conductivity.
Article
Chemistry, Multidisciplinary
Yu Kulvelis, O. N. Primachenko, I. Gofman, A. S. Odinokov, A. Shvidchenko, E. B. Yudina, E. A. Marinenko, V. T. Lebedev, A. Ya Vul
Summary: Proton conducting membranes based on short side-chain perfluorinated copolymers show great potential for use in hydrogen fuel cells, surpassing the characteristics of traditional long-chain membranes. By using functionalized nanodiamonds as modifying additives, additional ionogenic groups were introduced to the surface structure of the nanodiamonds, modifying the proton conductivity mechanism of composite membranes. The dependence of conductivity and mechanical properties of the prepared composite membranes on the surface charge of the introduced nanodiamonds was examined.
RUSSIAN CHEMICAL BULLETIN
(2021)
Article
Physics, Condensed Matter
Yu. V. Kulvelis, M. K. Rabchinskii, A. T. Dideikin, A. D. Trofimuk, A. V. Shvidchenko, D. A. Kirilenko, M. V. Gudkov, A. I. Kuklin
Summary: This study shows that in aqueous suspensions, the grafting of detonation nanodiamond particles onto graphene oxide flakes results in a slightly curved surface, forming planar aggregates of graphene oxide-detonation nanodiamond complexes. The effective curvature of the graphene oxide plane is attributed to the binding of detonation nanodiamonds in the form of planar aggregates.
JOURNAL OF SURFACE INVESTIGATION
(2021)
Article
Physics, Condensed Matter
V. T. Lebedev, Yu. V. Kulvelis, Gy. Torok, O. I. Ivankov, G. A. Polotskaya, L. V. Vinogradova, A. Ya. Vul, O. N. Primachenko, E. A. Marinenko, A. S. Odinokov
Summary: Neutron studies have revealed the formation of linear diffusion channels at the modifier-matrix interfaces in polyphenylene oxide films modified with polymers composed of fullerene with grafted polystyrene and poly-2-vinylpyridine arms. In membranes of perfluorinated copolymers with SO3H ionic groups, the presence of embedded detonation nanodiamonds has been found to expand channels for improved proton conductivity. These subtle mechanisms of membrane structuring by different modifiers are significant for the advancement of membrane design.
JOURNAL OF SURFACE INVESTIGATION
(2021)
