Article
Nanoscience & Nanotechnology
Jaroslav Stejskal, Dusan Kopecky, Hayk Kasparyan, Jarmila Vilcakova, Jan Prokes, Ivo Krivka
Summary: This study investigated the pressure-sensing properties of melamine sponges coated with polypyrrole globules or nanotubes, examining the conductivity dependency on pressure and showcasing the superior performance of polypyrrole nanotubes in various applications beyond conductivity-related ones, such as electromagnetic radiation shielding and adsorption of organic dye.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jaroslav Stejskal, Jarmila Vilcakova, Marek Jurca, Haojie Fei, Miroslava Trchova, Zdenka Kolska, Jan Prokes, Ivo Krivka
Summary: Macroporous melamine sponges were coated with polypyrrole conducting polymer. After high-temperature treatment, both the coating and the sponge were converted to macroporous nitrogen-containing carbons. Changes in molecular structure were observed during carbonization. The specific surface area and porosity of the coated sponge increased, and the conductivity was affected by compression. The coated sponges showed radiation absorption and reflection during shielding tests.
Review
Chemistry, Multidisciplinary
Jaroslav Stejskal, Irina Sapurina, Jarmila Vilcakova, Petr Humpolicek, Thanh Huong Truong, Mikhail A. Shishov, Miroslava Trchova, Dusan Kopecky, Zdenka Kolska, Jan Prokes, Ivo Krivka
Summary: The article provides a concise overview of recent research progress in the design of macroporous conducting materials, focusing on polypyrrole-coated melamine sponges. It highlights innovative results, suggests future directions, and discusses challenges in the field of macroporous conducting polymer composites. The diverse applications of these materials, along with the experimentation results, demonstrate their broad potential for various fields.
Article
Nanoscience & Nanotechnology
Jaroslav Stejskal, Irina Sapurina, Jarmila Vilcakova, Tomas Plachy, Michal Sedlacik, Constantin Bubulinca, Marek Goralik, Miroslava Trchova, Zdenka Kolska, Jan Prokes
Summary: The study successfully designed nanostructured hybrid materials that are both conducting and magnetic, which exhibit high conductivity and saturation magnetization, indicating potential applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jaroslav Stejskal, Marek Jurca, Jarmila Vilcakova, Miroslava Trchova, Zdenka Kolska, Jan Prokes
Summary: In this study, macroporous melamine/formaldehyde sponge was coated in situ during the oxidation of pyrrole with iron(III) chloride hexahydrate. It was found that the addition of silicotungstic acid resulted in the formation of polypyrrole/silicotungstate deposits in either globular or nanotube form. These hybrid composites combined an organic conducting polymer with an inorganic component and had a large specific surface area. Furthermore, carbonization of the sponges resulted in the formation of macroporous carbon electrodes.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Review
Polymer Science
Rudolf Holze
Summary: Intrinsically conducting polymers undergo changes in molecular structure and material properties in highly oxidizing conditions or positive electrode potentials. These changes depend on experimental conditions and chemical environment. While these changes may be beneficial for some applications, they often negatively affect the material's performance.
Article
Chemistry, Applied
Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jaroslav Stejskal, Miroslava Trchova, Dusan Kopecky, Jiri Pfleger
Summary: Conducting polymers, particularly polypyrrole, were used for surface modification of three different leathers. The polymer was deposited on collagen fibers, forming a thin layer with thickness ranging from 24 to 200 μm. The modified leathers showed changes in mechanical properties and sheet resistances, and their conductivity and electroactivity can potentially be utilized in intelligent leathers for footwear, heating elements, and energy storage.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Characterization & Testing
Jothi Selvam, Bharath Samannan, Praveen Peter, Jeyabalan Thavasikani
Summary: The research focuses on designing a new catalyst by doping POM in conducting polymers. The synthesis of PPy-doped Keggin type POM using coprecipitation method resulted in enhanced conductivity and antimicrobial activity.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Chemistry, Analytical
Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jaroslav Stejskal, Jan Prokes, Zdenka Kolska, Miroslava Trchova
Summary: Pigskin leather was carbonized to produce conducting nitrogen-containing carbons at temperatures up to 1200 degrees C. The yield of the solid char was high, even at high temperatures. The original morphology of collagen fibres was preserved and changes in molecular structure were observed. The electrical properties of the carbonized leather waste were found to be comparable to conducting polymers.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Analytical
Matthew S. Ting, Badri Narayanan Narasimhan, Jadranka Travas-Sejdic, Jenny Malmstrom
Summary: Conducting polymer hydrogel composites combine the elastic properties of hydrogels with the redox properties of conducting polymers to achieve out-of-plane actuation with excellent strain performance. The composite material maintains a stable Young's Modulus and exhibits higher actuation performance, potentially applicable in soft actuators, drug delivery, and cell culture studies.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Polymer Science
M. Almasoudi, M. Sh. Zoromba, M. H. Abdel-Aziz, M. Bassyouni, Ahmed Alshahrie, Abdullah M. Abusorrah, Numan Salah
Summary: Conducting polymers with 1D morphology have advantages for thermoelectric applications by improving electrical conductivity. Using an appropriate organic compound to create a self-degraded template is key for producing enhanced TE properties in 1D conducting polymers. In this study, PPy nanotubes synthesized with varying MO concentrations showed improved TE performance and a maximum power factor of 1 mu W/m k².
Article
Physics, Applied
Yukihiro Tsugita, Shuichi Maeda
Summary: Conductive inks were developed by combining indium tin oxide (ITO) with polypyrrole. The zeta potentials of the resulting polypyrrole-ITO inks were found to be pH-dependent, with zero zeta potential at pH 5. Thermogravimetric analysis revealed the thermal behavior of ITO and its inks. The conductivities of the inks were measured and compared to the neat polymer, showing excellent conductivity even at low temperatures for LED lighting.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Review
Polymer Science
Nurul Akmaliah Dzulkurnain, Marliyana Mokhtar, Jahwarhar Izuan Abdul Rashid, Victor Feizal Knight, Wan Md Zin Wan Yunus, Keat Khim Ong, Noor Azilah Mohd Kasim, Siti Aminah Mohd Noor
Summary: This review focuses on the application of conducting polymers, particularly Polypyrrole (PPy), in electrochemical sensors. It discusses the theoretical background and applications of impedance and voltammetric analysis in electrochemical detection, as well as the use of PPy as a sensing material. Researchers, especially those without an electrochemical analysis background, are expected to benefit from this easy-to-understand summary of concepts and technologies used in electrochemical sensor research, particularly with PPy as a sensing material.
Article
Materials Science, Multidisciplinary
Arinola Isa Olamilekan, Hyeonuk Yeo
Summary: A new type of liquid crystal epoxy resin was synthesized with double mesogenic structures connected by aliphatic spacers, enhancing its self-assembling properties and achieving remarkably high thermal conductivity.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Bowen Yao, Luize Scalco de Vasconcelos, Qingyu Cui, Anne Cardenas, Yichen Yan, Yingjie Du, Dong Wu, Shuwang Wu, Tzung K. Hsiai, Nanshu Lu, Xinyuan Zhu, Ximin He
Summary: Compared to conventional rigid electronics, polymer-based soft electronics that conform to irregular shapes of organisms have advantages in long-term bio-interface interactions. However, the current polymer materials are unstable in alkaline environments, reductants, and applied voltage, leading to performance deterioration. This study proposes a coating strategy using reduced-graphene-oxide thin layers to enhance stability and conductivity.
Article
Polymer Science
Jaroslav Stejskal, Michal Pekarek, Miroslava Trchova, Zderika Kolska
Summary: This study investigates the enhanced adsorption of organic dyes by coating melamine sponge with nanotubes or globular polypyrrole. The results show that the nanotubes deposited on the sponge are more efficient adsorbents for anionic dyes compared to the analogous polypyrrole globules.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Stanislav Nespurek, Petr Kubersky, Radek Polansky, Miroslava Trchova, Jakub Sebera, Vladimir Sychrovsky
Summary: The presence of solvent-free ionic liquid (SF-IL) near poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) results in a decrease in the oxidation level of the polymer and an increase in the HOMO-LUMO gap, as shown by Raman spectra. Quantum chemical calculations illustrate the process of polymer dedoping and the modification of the electronic structure of the polymer.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Polymer Science
Konstantin A. Milakin, Zuzana Moravkova, Rafal Konefal, Sonal Gupta, Udit Acharya, Zuzana Walterova, Patrycja Bober
Summary: The influence of oxidant nature and monomer:oxidant ratio on the polymerization of indole in water-ethanol medium was studied. The study optimized the reaction conditions and successfully synthesized polyindole materials with improved conductivity and thermal stability. Furthermore, by further optimizing the oxidant:monomer ratio, the carbonyl content in the polyindole molecular structure was reduced and the electroactivity of the material was enhanced.
Article
Chemistry, Applied
Konstantin A. Milakin, Udit Acharya, Islam M. Minisy, Doebner Von Tumacder, Zuzana Moravkova, Oumayma Taboubi, Tomas Syrovy, Lucie Syrova, Jiri Pfleger, Patrycja Bober
Summary: Colloidal dispersions of protonated polyaniline were prepared with the presence of phytic acid, leading to larger particle size and better long-term stability. The coatings exhibit different surface properties that can be useful for electrochemical applications.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Electrochemistry
Konstantin A. Milakin, Sonal Gupta, Ognen Pop-Georgievski, Zuzana Moravkova, Udit Acharya, Oumayma Taboubi, Stefan Breitenbach, Nemanja Gavrilov, Christoph Unterweger, Patrycja Bober
Summary: Polypyrrole-gelatin aerogels were successfully synthesized using a cryopolymerization approach and carbonization treatment. The carbonized materials exhibited preserved mechanical integrity, macroporous morphology, and enhanced structural order at higher temperatures. The nitrogen-containing carbon materials showed high conductivity and specific surface area, and the gravimetric capacitance of the products increased with higher carbonization temperatures.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Wei Lyu, Jiaqiang Li, Miroslava Trchova, Guang Wang, Yaozu Liao, Patrycja Bober, Jaroslav Stejskal
Summary: In this study, three-dimensional polyaniline/poly(vinyl alcohol)/montmorillonite (PANI/PVAL/MMT) hybrid aerogels with easy separation performance and highly effective reusable adsorption on both anionic and cationic dyes were successfully fabricated by a simple in-situ polymerization method. The resulting hybrid aerogels showed a well-defined hierarchical structure with PANI nanofibers coated on the skeleton wall. The adsorption performance of the hybrid aerogels on anionic and cationic dyes was systematically studied, demonstrating their excellent adsorption capacity.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jaroslav Stejskal, Marek Jurca, Jarmila Vilcakova, Miroslava Trchova, Zdenka Kolska, Jan Prokes
Summary: In this study, macroporous melamine/formaldehyde sponge was coated in situ during the oxidation of pyrrole with iron(III) chloride hexahydrate. It was found that the addition of silicotungstic acid resulted in the formation of polypyrrole/silicotungstate deposits in either globular or nanotube form. These hybrid composites combined an organic conducting polymer with an inorganic component and had a large specific surface area. Furthermore, carbonization of the sponges resulted in the formation of macroporous carbon electrodes.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Monika Vostinakova, Simona Lupinkova, Petr Rysanek, Jaroslav Stejskal, Zdenka Kolska
Summary: A novel composite material, polyaniline/aramid, was synthesized for the purpose of capturing carbon dioxide. The polyaniline was prepared via oxidative polymerization of aniline and used to modify the aramid surface. The composite showed a significantly increased carbon dioxide capture capacity compared to pristine aramid. This new material has the potential to be used as an effective adsorbent for carbon dioxide and for applications based on its adsorption properties.
POLYMER INTERNATIONAL
(2023)
Article
Chemistry, Applied
Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jaroslav Stejskal, Miroslava Trchova, Dusan Kopecky, Jiri Pfleger
Summary: Conducting polymers, particularly polypyrrole, were used for surface modification of three different leathers. The polymer was deposited on collagen fibers, forming a thin layer with thickness ranging from 24 to 200 μm. The modified leathers showed changes in mechanical properties and sheet resistances, and their conductivity and electroactivity can potentially be utilized in intelligent leathers for footwear, heating elements, and energy storage.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Analytical
Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jaroslav Stejskal, Jan Prokes, Zdenka Kolska, Miroslava Trchova
Summary: Pigskin leather was carbonized to produce conducting nitrogen-containing carbons at temperatures up to 1200 degrees C. The yield of the solid char was high, even at high temperatures. The original morphology of collagen fibres was preserved and changes in molecular structure were observed. The electrical properties of the carbonized leather waste were found to be comparable to conducting polymers.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Materials Science, Multidisciplinary
Jaroslav Stejskal, Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jan Prokes
Summary: In this study, leather waste carbonized at 800 ?C in an inert atmosphere was coated in situ with polyaniline. The resulting composites exhibited a bicontinuous conducting morphology due to the fibrous collagen structure of the original leather. The composites showed good conductivity even under alkaline conditions and were demonstrated to be potential adsorbents for organic-dye pollutants in water treatment, controllable by applied electrical potential.
Article
Chemistry, Multidisciplinary
Barbora Grycova, Katerina Klemencova, Pavel Lestinsky, Jaroslav Stejskal, Tomas Saha, Miroslava Trchova, Jan Prokes
Summary: The study investigates the conductivity of chromium-tanned pigskin leather waste carbonized using various methods to produce nitrogen-containing carbons. Four protocols were tested, and the most effective method involved pre-carbonization followed by activation. It was found that the carbonized material maintained its fibrous collagen morphology, with a slight reduction in yield. The activated products showed improved specific surface area, pore volume, and conductivity. The resistivity of the carbonized leather was determined, and the sample conductivity was relatively unaffected by the carbonization method.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Polymer Science
Konstantin A. A. Milakin, Oumayma Taboubi, Udit Acharya, Miloslav Lhotka, Vaclav Pokorny, Magdalena Konefal, Olga Kockova, Jirina Hromadkova, Jiri Hodan, Patrycja Bober
Summary: Magnetic polypyrrole-gelatin-barium ferrite (PPy-G-BaFe) cryogels/aerogels were successfully synthesized by incorporating barium ferrite nanoparticles into a gelatin solution and conducting one-step oxidative cryopolymerization of pyrrole. The resulting aerogels exhibited higher specific surface area and conductivity compared to PPy-G aerogel prepared without barium ferrite. The magnetic PPy-G-BaFe aerogel with 10 wt% BaFe content showed significantly improved adsorption capacity and rate for anionic dye removal, making it an attractive adsorbent for water purification.
Article
Chemistry, Applied
Xiaodan Wu, Zihan Wang, Guansong Shao, Bingyang Qin, Ying Wang, Tao Wang, Zhiguo Liu, Yujie Fu
Summary: In this study, a new type of cellulose-based ionic imprinting adsorbent was developed for the selective removal of cobalt ions. The adsorbent exhibited excellent adsorption performance, high cycling stability, and preferential selectivity for cobalt ions. The simple preparation method and promising application prospects make it a promising candidate for water treatment.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Chandirasekar Shanmugam, Vanitha Marimuthu, Nagappan Rajendiran
Summary: In this study, monodispersed gold and silver nanoparticles were synthesized using cholic acid functionalized star poly(DL-lactide) as a capping and reducing agent. The synthesized materials were found to be effective heterogeneous catalysts for the reduction reaction.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Bianca-Iulia Ciubotaru, Mirela-Fernanda Zaltariov, Mihaela Dascalu, Adrian Bele, Alexandra Bargan, Maria Cazacu
Summary: Porous networks were obtained using polysiloxanes pendant functionalized with aminopropyl groups. The addition of certain substances, such as ammonium bicarbonate and acetic acid, promoted the porosity and covalent cross-linking of the polymer. The resulting materials exhibited high dielectric permittivity and significant electrical output signal when subjected to compression, making them suitable for capacitive pressure sensors.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Mohamed A. Zein, Basim H. Asghar, Abdulaziz M. Almohyawi, Norah F. Alqahtani, Ahmed Alharbi, J. Alkabli, Reda F. M. Elshaarawy, Lamia A. Ismail
Summary: In this study, new amphiphilic chitosan-thyme extract-nanosilver nanocomposites were prepared, which synergistically inhibited bacterial biofilm formation and bacterial proliferation. The nanocomposites disrupted bacterial cell membranes, causing cell death, and prevented biofilm formation. In addition, the nanocomposites exhibited good biocompatibility, making them potential candidates for biomedical applications.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Review
Chemistry, Applied
Norah F. Alqahtani
Summary: This review explores the potential of Imidazolium-based ionic liquids (ImILs) in improving the solubility, stability, and functionality of chitosan, and provides an overview of the types and preparation methods of functionalized imidazolium ionic liquids (FImILs). Additionally, it discusses the various opportunities offered by FImIL-chitosan derivatives.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Olesya N. Zabegaeva, Alexey F. Kosolapov, Sergei L. Semjonov, Mariam G. Ezernitskaya, Egor S. Afanasyev, Ivan A. Godovikov, Alexander Chuchalov, Dmitriy A. Sapozhnikov
Summary: Polyimides are commonly used as primary protective coatings for optical fibers in high-temperature applications. However, the manufacturing process is complicated due to certain drawbacks. This study shows the potential use of polyamide-imides as highly reliable protective coatings for optical fibers.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Luis Miguel Nunez Tapia, Pascal Thebault, Laurent Bischoff, Alain Ledoux, Florian Defontaine, Olivier Lesouhaitier, Fabrice Burel
Summary: A water soluble cationic bis-cyclocarbonate was prepared through a three steps procedure, and non-isocyanate polyurethanes were prepared in acetonitrile with high yields. The resulting materials exhibited good thermal properties and hydrophilic properties. The polyurethane thermoset showed high inhibition towards bacteria, and the bis-cyclocarbonate oligomer was found to be harmless to organisms.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
