Article
Polymer Science
Zilong Zhang, Ke Zhang, Kaili Xie, Ying Bao, Xiaohan Li, Jiateng Huang, Xiaojie Li, Wei Wei
Summary: In this study, a eugenol allyl ether grafted polysiloxane (PMES-Allyl) was synthesized and used to modify BD resin to improve its toughness and flame retardancy. The addition of 15 wt% PMES-Allyl resulted in well-dispersed particles in the resin matrix, leading to an increase in crosslinking density. The cured BDPA15% resin exhibited improved mechanical properties, comparable thermal stability, and excellent flame retardancy.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Applied
Rui Yang, Kan Zhang
Summary: The study developed three strategies, including chemical modification and physical blending, to enhance the performance of benzoxazine resin. The newly obtained DBA-ac/DDM-BMI blend exhibited outstanding properties such as low thermal expansion coefficient, high thermal stability, excellent flame retardancy, and low dielectric constant.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Roxana Dinu, Anastasiia Pidvoronia, Ugo Lafont, Olivier Damiano, Alice Mija
Summary: Renewable flavonoid and phlorotannin extracts were used to synthesize sustainable thermosetting resins with high performance. The designed thermosets showed high glass transition values, storage moduli, crosslinking densities, and gel content. These polyaromatic thermosets exhibited high mechanical strength, toughness, and heat resistance, and could be chemically recycled. They are recommended as environmentally friendly alternatives to petroleum-based epoxy resins in various industries.
Article
Polymer Science
Jiaming Yang, Yonggang Zhang, Mengyuan Hao, Jianhai Zhi, Xin Qian
Summary: This work introduces a novel in-situ interpenetrating network (IPN) structure composed of epoxy resin, vinyl ester resin (VER), and modified octavinyl polyhedral oligomeric silsesquioxane (EPOSS) for toughening epoxy resin. The incorporation of VER forms IPN structures without phase separation, resulting in improved overall strength and plastic deformation capacity. The EPOSS dispersion in the resin matrix triggers plastic shear deformation toughening and the physical entanglement of EPOSS maintains a balance between toughness and mechanical strength. With only 2 wt% of EPOSS, significant improvements in impact toughness, tensile strength, and Young's modulus are achieved.
Article
Polymer Science
Haihui Cai, Jiahao Shi, Xiaorui Zhang, Zhou Yang, Ling Weng, Qingye Wang, Shaohui Yan, Lida Yu, Junlong Yang
Summary: A branched structure was added to a BMI system to enhance its toughness, resulting in improved flexural strength, decreased dielectric constant and dielectric loss, increased breakdown field strength, and improved volume resistivity.
Article
Polymer Science
Derek B. Dwyer, Evan R. Glaser, Christopher A. Klug, Sara Isbill, Jong K. Keum, Wim Bras, Jennifer L. Niedziela, Andrew J. Miskowiec
Summary: This study investigates the fluorescence spectra of BPF epoxy resin and identifies two emission peaks, one from the BPF epoxy monomer and the other from an aggregate structure. The aggregate structure is determined to be an H-aggregate based on experimental and theoretical calculations. Thermal exposure causes changes in the aggregate structure, allowing the fluorescence signal to serve as an indicator of polymer network rearrangement.
Article
Engineering, Electrical & Electronic
Qingguo Chi, Xiaowen Zhang, Changhai Zhang, Yu Feng, Chao Tang, Zhonghua Li, Tiandong Zhang
Summary: By investigating the electrical characteristics and heat-resistance of BMI/EP systems, it is found that the introduction of BMI greatly improves the heat-resistance of the epoxy systems, demonstrating great potential for BMI/EP to be used in power modules with excellent insulation properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Jingjing Meng, Hao Guan, Chunyu Li, Zhiyong Li, Zheng Fang, Kai Guo
Summary: The conversion of 5-hydroxymethylfurfural, honokiol, and magnolol into sustainable epoxy monomers leads to the synthesis of novel interpenetrating polymer networks (IPN) using 3,3'-diamino diphenylsulfone (33DDS) or 4,4'-diamino diphenylsulfone (44DDS) as curing agents. The twist-stacked structure induced by 33DDS provides excellent mechanical properties and high phase transition temperature, while the planar weave matrix formed with 44DDS exhibits superior thermal and electrical properties. Furthermore, the biobased epoxy resin wastes can be reclaimed through both aerobic and anaerobic pyrolysis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Xiaotao Fu, Long Ma, Lincong Chen, Cong Zhang, Xiaolin Chen, Xinran Li, Fangda Fu, Chuanfu Fu, Taobei Lin, Wensheng Mao
Summary: This study conducted wet heat aging and salt spray aging experiments on different resin systems. It found that certain formulations with 10% or 20% of specific components exhibited excellent thermo-mechanical properties and aging resistance, making them suitable for the cross arm material of composite insulators.
Article
Materials Science, Multidisciplinary
Xianzhe Sheng, Shuhuan Yun, Shengli Wang, Yusong Gao, Xinpei Zuo, Xing Miao, Xuetao Shi, Jianbin Qin, Zhonglei Ma, Guangcheng Zhang
Summary: The highly heat resistant and mechanically strong PI/BMI rigid foams were successfully fabricated and have potential application as structural materials in aerospace and military ships.
MATERIALS TODAY PHYSICS
(2023)
Article
Polymer Science
Hechen Liu, Xuan Wu, Zhanpeng Guo, Peng Dong, Qi Ge, Liwei Wei, Zhanglin Sun
Summary: This study investigates the influence of the maleopimaric anhydride (MPA) content on the initiation and growth characteristics of electrical trees in epoxy resin. Results show that the MPA curing agent has a higher initiation voltage and inhibits the growth of electrical trees.
Article
Polymer Science
Zicheng Fan, Insub Noh, Changlong Zhuang, Qingqing Liu, Yanbin Wang, Hyung Do Kim, Meng Yue, Hideo Ohkita, Biaobing Wang
Summary: With the rapid development of 5G technology, there is a great challenge in designing and fabricating lightweight polymer materials with excellent properties. In this study, a novel polyimide compound and phenoxycycloposphazene were used to successfully fabricate flame retardant and low dielectric constant composites. The materials showed improved comprehensive performance.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Michaela Seidlova, Jakub Hodul, Nikol Zizkova, Ruben Paul Borg
Summary: This study focuses on the kinetics of the crystallization process of epoxy resins and the impact of crystallinity on the parameters of epoxy-based materials. The results show that increasing crystallinity leads to a decrease in mechanical and chemical resistance, but an increase in density, strength, and hardness.
Article
Materials Science, Multidisciplinary
Hechen Liu, Xuan Wu, Yunpeng Liu, Zhanpeng Guo, Qi Ge, Zhanglin Sun
Summary: This study prepared a curing agent MPAc from rosin and blended it with a petroleum-based curing agent to cure epoxy resin. The effects of the blending ratio on the properties of the resin were investigated. The results showed that the introduction of MPAc improved the thermal properties while reducing the mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Polymer Science
Chi-Ping Li, Chih-Min Chuang
Summary: The study compared the thermal and dielectric properties of rigid-rod bifunctional epoxy resin and commercial epoxy resin, finding that the rigid-rod structure exhibited better performance with higher 5% weight loss temperature and smaller thermal expansion coefficient than the flexible structure. Additionally, the rigid-rod system demonstrated higher Tg and better dielectric properties when enough curing agent was provided.
Article
Electrochemistry
Kalyan Ghosh, Chee Yoon Yue
ELECTROCHIMICA ACTA
(2018)
Article
Chemistry, Physical
Kalyan Ghosh, Chee Yoon Yue, Md Moniruzzaman Sk, Rajeeb Kumar Jena, Shuguang Bi
SUSTAINABLE ENERGY & FUELS
(2018)
Article
Chemistry, Physical
Kalyan Ghosh, Siowwoon Ng, Christian Iffelsberger, Martin Pumera
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
K. P. Akshay Kumar, Kalyan Ghosh, Osamah Alduhaish, Martin Pumera
Summary: This study demonstrates a simple and cost-effective method to improve the catalytic properties of 3D-printed nanocarbon electrodes for energy conversion applications by using a dip-coating technique with catalytically active materials.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Kalyan Ghosh, Martin Pumera
Summary: Recent research has focused on the use of 2D nanomaterials such as MXenes and TMDs in energy storage devices due to their excellent properties. Asymmetric supercapacitors have been fabricated to address the energy density limitations of MXene, providing a wide potential window electrolyte for potential use in modern electronics. Through the combination of MXene and electroactive 3D-printed nanocarbon framework, customized ASCs exhibit excellent capacitive performance, showing promise for energy storage in electronic applications.
Article
Chemistry, Physical
Cameron Jellett, Kalyan Ghosh, Michelle P. Browne, Veronika Urbanova, Martin Pumera
Summary: Flexible and conductive poly(lactic acid)/graphite composite films with a high mass percentage of conductive graphitic material were prepared in this study for industrial-scale electrochemical applications like electrochemical water splitting or supercapacitors. These films can be used as stable electrodes in aqueous solutions and were demonstrated to be suitable for the hydrogen evolution reaction and flexible solid-state supercapacitor devices. Their geometric characteristics can be manipulated to any shape and size, making them scalable to large areas.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Environmental
Siowwoon Ng, Kalyan Ghosh, Jan Vyskocil, Martin Pumera
Summary: Modern wearable electronics require scalable, flexible, and conductive electrodes with tunable properties. This study combines flexible graphite films and 2D vanadium sulfide to achieve multiple functionalities such as photoelectrocatalysis and pseudocapacitive charge storage.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Kalyan Ghosh, Siowwoon Ng, Christian Iffelsberger, Martin Pumera
Summary: This study successfully fabricated an electrocatalytically active filament using fused deposition modeling (FDM) 3D printing technology, and optimized its composition to achieve a filament with good flexibility and conductivity. The functionality of the printed electrodes was demonstrated in energy conversion and storage applications.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Mario Palacios-Corella, Kalyan Ghosh, Edurne Redondo, Martin Pumera
Summary: To address the contemporary energy crisis, it is crucial to prepare supercapacitors quickly and cost-effectively to replace traditional batteries. This study demonstrates that carbon-based 3D-printed carbon electrodes combined with two polyoxometalates can enhance the capacitance by utilizing the exceptional properties of these polyoxometalates. Furthermore, the difference in the nature of the counter ions affects the capacitance and resistance of the materials, highlighting the importance of considering these factors during preparation.
Article
Chemistry, Physical
Kalyan Ghosh, Christian Iffelsberger, Martin Konecny, Jan Vyskocil, Jan Michalicka, Martin Pumera
Summary: This study demonstrates the use of a triboelectric nanogenerator (TENG) for the production of green hydrogen from renewable mechanical energy. A magnetic covalent organic framework composite is used as the positive triboelectric material, while MXene incorporated polydimethylsiloxane (PDMS) film serves as the negative triboelectric material in a contact-separation mode TENG (CS-TENG). Micropatterns are incorporated on the surface of PDMS/MXene film using 3D printing technology. The CS-TENG harvests energy from simple mechanical actions and the harvested electrical energy is used for water electrolysis, producing hydrogen and oxygen. This research is expected to enable the production of green hydrogen from mechanical energy sources such as raindrops, wind, and vehicle movements.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sujit Deshmukh, Kalyan Ghosh, Martin Pykal, Michal Otyepka, Martin Pumera
Summary: Microsupercapacitors with mechanical flexibility offer potential applications in portable biomonitoring devices. Researchers have developed high-energy-density micro-SCs integrated with a force sensing device using picosecond pulsed laser technology, and demonstrated their effectiveness in monitoring human body's radial artery pulses.
Article
Chemistry, Multidisciplinary
Kalyan Ghosh, Siowwoon Ng, Petr Lazar, Akshay Kumar K. Padinjareveetil, Jan Michalicka, Martin Pumera
Summary: This study demonstrates the enhanced electrochemical performance of germanane (GeH) by fabricating a heterostructure with Ti3C2Tx (GeMXene). The GeMXene shows superior capacitive performance and selectively allows cation intercalation. The research opens up possibilities for exploring heterostructures of other 2D materials and their applications in different electrolytes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kalyan Ghosh, Martin Pumera
Summary: This study investigates the integration of 3D printing and room-temperature electrodeposition techniques for the simple fabrication of customized free-standing 3D electrodes for supercapacitor applications.
Article
Chemistry, Multidisciplinary
Kalyan Ghosh, Siowwoon Ng, Christian Iffelsberger, Martin Pumera
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Electrochemistry
K. P. Akshay Kumar, Kalyan Ghosh, Osamah Alduhaish, Martin Pumera
ELECTROCHEMISTRY COMMUNICATIONS
(2020)
