Article
Chemistry, Physical
Lingxin He, Xin Jiang, Xia Zhou, Zhaoxin Li, Fukai Chu, Xin Wang, Wei Cai, Lei Song, Yuan Hu
Summary: This study introduces a simple and environmentally friendly electrochemical exfoliation method for preparing black phosphorus-MXene nanohybrids, which enhances the fire safety and mechanical properties of waterborne polyurethane. The incorporation of 2.0 wt% BP-Ti3C2 shows a significant flame retardancy effect on WPU, with reductions in peak heat release rate, total heat release, total smoke production, and total CO2 yield. The electrochemical exfoliation method provides a reference for environmentally friendly preparation of two-dimensional nanomaterials with improved fire safety properties for polymer composites.
APPLIED SURFACE SCIENCE
(2022)
Article
Polymer Science
Li Dang, Zhihui Lv, Xin Liu
Summary: The addition of 1 phr of ZB in polypropylene composites effectively improves flame retardancy and slows down the burning rate, resulting in reduced smoke production. The formation of a compact and graphitized char residue by ZB hinders heat diffusion and oxygen transmission, suppressing the combustion mechanism in the gas phase.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Thanh Mai Nguyen Tran, M. N. Prabhakar, Dong Woo Lee, Maurelio Cabo, Jung-Il Song
Summary: This research focuses on fabricating flame-retardant green composites by using eggshell powder as an additive, optimizing the reinforcement of abaca fibers in the composites, and examining the thermal and flame-retardant properties of the composites with different percentages of eggshell powder.
POLYMER COMPOSITES
(2021)
Article
Engineering, Manufacturing
Avishek Mishra, Daeseung Jung, Nam Kyeun Kim, Debes Bhattacharyya
Summary: This study compares two processing techniques, chemical and physical, to repurpose chicken feathers into flame-retardant chicken fibres (FRCF) for enhancing the fire and mechanical performances of polypropylene (PP) composites. Repurposing chicken feathers helps reduce industrial waste and expensive waste management solutions. The suitable method of attaining FRCF is selected based on fire reaction and mechanical outcomes. PP composites with 44 wt% FRCF achieve a significant reduction in peak heat release rate and the chemically-treated fibre composites achieve a V-0 rating, demonstrating the impact of fibre processing techniques on composite performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Multidisciplinary
Jingnan Zhang, Siming Lian, Yifan He, Xinyu Cao, Jiaming Shang, Qingyun Liu, Gang Ye, Kun Zheng, Yongmei Ma
Summary: A new method was proposed to improve the thermal stability of the highly reactive flame retardant CPPOA, resulting in the successful synthesis of intrinsic flame-retardant polyamide 66 (FRPA66) with excellent properties. The FRPA66 showed high flame retardancy and good mechanical properties, demonstrating great potential for various applications.
Article
Chemistry, Multidisciplinary
Xiaofeng Hong, Shuai Zhang, Zhuangzhuang Tian, Shiqian Qin, Lin Yang, Daijun Liu, Zhanyong Gu, Jianjun Chen
Summary: A new type of ammonium polyphosphate-intercalated organic montmorillonite (APP/OMt) was synthesized using in-situ polymerization, and added into polypropylene (PP) to fabricate PP/IFRAPP/OMt composites. The addition of APP/OMt significantly improved the flame-retardant and mechanical properties of the PP composites, while reducing the smoke release during combustion and improving the quality of the carbon layer after combustion.
Article
Polymer Science
Mingqiang Shao, Yiran Shi, Jiangtao Liu, Baoxia Xue, Mei Niu
Summary: A combination catalyst was designed to improve the residual char of polypropylene (PP), which provides physical barrier effects and promotes catalytic charring activity. The PP blends with this combination catalyst showed remarkable improvement in flame retardancy and achieved a high yield of residual char. The production of a large amount of residual char reduced the release of pyrolytic products and formed a thermal shield, resulting in reduced heat release rates. Additionally, the tensile strength and Young's modulus of the PP blends were maintained without sacrificing toughness, thanks to the highly dispersed WS2.
Article
Chemistry, Multidisciplinary
Jingyu Li, Haichao Zhao, Guoxin Sui
Summary: Hydrosilylation epoxidized eugenol (HSI-EP-EU) is synthesized and used as a reactive diluent for epoxy/anhydride and epoxy/imidazole curing systems. HSI-EP-EU demonstrates good dilution effects, antibacterial properties, and improved mechanical properties for the epoxy/imidazole system.
Article
Engineering, Manufacturing
Lina Liu, Bingbing Shi, Anlin Zhang, Yijiao Xue, Jianzhong Zhang, Jinfeng Dai, Morteza Hassanpour, Long-Cheng Tang, Yongqian Shi, Pingan Song
Summary: In this study, a new type of fire retardant was developed by grafting poly-phosphoramide into the chemical structure of lignin waste. The resulting PLA material showed significantly enhanced thermal stability and satisfactory fire retardancy, while maintaining the strength and ductility of pure PLA.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Chemistry, Applied
Yang Luo, Jingyu Cai, Ling Li, Xiaocheng Lin, Longqiang Xiao, Linxi Hou
Summary: A new multi-DOPO-based reactive flame retardant (DZH) was successfully synthesized and used as a co-curing agent with DDM in epoxy resin (EP), achieving a balance between flame retardancy and overall performance. The addition of DZH decreased the activation energy of the curing reaction system and enhanced the formation of char residues under high temperature conditions. The EP/DZH system exhibited significantly improved flame retardancy and mechanical properties at certain additions.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Physical
Zhenting Yin, Jingyi Lu, Ningning Hong, Wenhua Cheng, Pengfei Jia, Huijuan Wang, Weizhao Hu, Bibo Wang, Lei Song, Yuan Hu
Summary: In this study, ZIF-8@Ti3C2Tx was synthesized to reduce the heat and toxic gases of FPUF, resulting in significantly decreased peak of heat release rate (PHRR), total heat release (THR), CO and HCN emissions. The flame-retardant FPUF also exhibited improved tensile and compression strength, showcasing the superior dual metal catalytical charring-forming effect and physical barrier effect of ZIF-8@Ti3C2Tx.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Wufei Tang, Hao Wang, Qian Yang, Fang Liu, Wubliker Dessie, Xiaofang Luo, Cun Peng, Sheng Zhang, Keren Shi, Wenxiang Sun, Zuodong Qin, Xiaoyu Gu
Summary: The study introduces a rapid, green, and cost-effective method for preparing graphene nanosheets (GRNs) from their layered bulks, and incorporating them into polypropylene to enhance the flame retardancy of the composite material.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Shafi Ur Rehman, Sana Javaid, Muhammad Shahid, Iftikhar Hussain Gul, Badar Rashid, Caroline R. Szczepanski, Muhammad Naveed, Sabrina J. Curley
Summary: Polystyrene/sepiolite clay nanocomposites were successfully prepared via melt extrusion technique with VTES as the compatibilizer and cross-linking agent. The addition of sepiolite clay improved the thermal stability, mechanical properties, and flame retardancy of the nanocomposites.
Article
Engineering, Environmental
Weifu Sun, Yaru Sun
Summary: In this work, meta-kaolinite was successfully modified by growing melamine-phytate nanoflakes within the interlayer and on the surface of metakaolinite. The modified meta-kaolinite was then incorporated into polyurea, resulting in improved fire safety and mechanical properties. The flame retardancy and smoke suppression of the composite material were evaluated through various tests, and the underlying mechanism for the improved performance was explored. This work provides a new strategy for fabricating long-life flame retardant materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Mingqiang Shao, Ying Li, Yiran Shi, Jiangtao Liu, Baoxia Xue, Mei Niu
Summary: The combination of NiO, Al2O3, and AC enhances the charring ability of PP, leading to the formation of abundant char layers. The addition of Al2O3 increases the dispersion and the dehydrogenation and carbonization activity of NiO. Compared to neat PP, the decomposition temperature is increased by 90°C, and the residual char yield reaches 44.6%.
Article
Materials Science, Multidisciplinary
Anna G. Dymerska, Bartosz Sroda, Beata Zielinska, Ewa Mijowska
Summary: An efficient electrocatalyst for sustainable hydrogen-fuel production was designed by fabricating cobalt oxyhydroxide catalysts through low-temperature calcination of ZIF-67. The treated ZIF-67 at 200 degrees C exhibited the most electroactive composition with a high electrochemically active surface and turnover frequency, resulting in a robust catalyst for improved electrochemical energy conversion from water. In situ spectroscopy and microscopic techniques revealed the active intermediates and proposed the lattice oxygen mechanism of the reaction.
MATERIALS & DESIGN
(2023)
Article
Electrochemistry
Lennart Singer, Wojciech Kukulka, Elisa Thauer, Nico Graessler, Andika Asyuda, Michael Zharnikov, Ewa Mijowska, Ruediger Klingeler
Summary: We have reported a nanocomposite material, Fe3O4@HCS, consisting of ultra-small Fe3O4 nanoparticles uniformly decorated on hollow carbon spheres. This hierarchically-structured material exhibits excellent electrochemical cycling performance as an anode in lithium-ion batteries, exceeding the theoretical capacity of Fe3O4. The reversible capacity increases to 1050 mAh g-1 at 0.1 A g-1 after 250 cycles. Scanning and transmission electron microscopy images, along with detailed electrochemical analysis, reveal that the outstanding performance is attributed to the formation and decomposition of a capacitative surface layer during discharging and charging.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Bartosz Sroda, Anna G. Dymerska, Beata Zielinska, Ewa Mijowska
Summary: In this study, a composite of Ti3C2Tx and ZIF-67 (MXene/ZIF-67) is developed as an efficient electrocatalyst for the oxygen evolution reaction (OER). The composite exhibits improved electrochemical stability and a lower overpotential compared to MXene and RuO2. In addition, the study reveals the mechanism and role of each component in enhancing the OER performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Shiyun Li, Yuqiong Guo, Lina Liu, Jiangang Wang, Luxi Zhang, Weilong Shi, Malgorzata Aleksandrzak, Xuecheng Chen, Jie Liu
Summary: FeTCPP@CNNS composites with g-C3N4 nanosheet and FeTCPP as sensitizers were fabricated using in situ hydrothermal self-assembly. The composites exhibited a stacked lamellar structure with uniformly introduced FeTCPP. Compared to pure CNNS, the FeTCPP@CNNS composites showed significantly improved photocatalytic performance in the degradation of 4-NP. The optimal content of FeTCPP to CNNS (3 wt%) achieved a photodegradation activity of 92.4% within 1 hour.
Article
Electrochemistry
Tomasz Kedzierski, Daria Baranowska, Beata Zielinska, Ewa Mijowska
Summary: In this study, a facile strategy using ultrafast and self-expansion reduction reaction (USER) was proposed to improve the electrochemical performance of a free-standing Li-ion battery electrode composed of titanium dioxide (TiO2) by forming a composite with reduced graphene oxide (RGO). The self-expansion induced by rapid heating provided cavities/empty spaces to mitigate volume change during charge/discharge process, resulting in enhanced storage and conversion response of the system (765 mAh g(-1) at 0.05 A g(-1)) and accelerated Coulombic efficiency. Detailed electrochemical, microscopic, and structural analyses demonstrated that this internal expansion improved ionic diffusion and protected the material from volume changes during charge/discharge process. Therefore, this simple and fast strategy offers a solution to enhance the electrochemical performance of other active materials sensitive to volume expansion during lithiation/delithiation process.
Article
Electrochemistry
Peng Guo, Lennart Singer, Zhiyong Zhao, Wojciech Kukulka, Finn Sebastian, Ewa Mijowska, Michael Zharnikov, Peter Comba, Ruediger Klingeler
Summary: A simple method was used to prepare carbon-coated tungsten oxides and disulfides using low-cost carbon sources (CTAB and PVP). These composites exhibit excellent capacity retention and cycle stability in lithium-ion storage.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Anna G. Dymerska, Bartosz Sroda, Beata Zielinska, Ewa Mijowska
Summary: In this study, a low-cost and environmentally-friendly nanocomposite based on titania/silica/carbon was designed and fabricated as the cathode for zinc-ion capacitors. The nanocomposite exhibited improved performance in terms of specific capacity, power, and energy densities, with a high stability retention of 85% after 10,000 cycles. This research has significant implications for the development of low-cost and high-performance energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Krzysztof Sielicki, Xuecheng Chen, Ewa Mijowska
Summary: This study investigates the design and characterization of cobalt-based electrocatalysts embedded into porous carbons derived from an Al-metal-organic framework (MOF). The study reveals that the presence of aluminium improves the oxygen evolution reaction (OER) performance of the anode by lowering electrolyte resistance and forming additional electrocatalytically active species. Additionally, carbon plays a role in boosting the OER activity of cobalt with sustained high durability.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Daria Baranowska, Ewa Mijowska, Beata Zielinska
Summary: A sustainable approach to fabricate one-dimensional graphitic carbon nitride (gCN) for photocatalytic hydrogen generation is reported. This approach involves the modification of two-dimensional gCN with L-ascorbic acid, leading to the formation of a one-dimensional structure. The resulting gCN_1D exhibits significantly enhanced photocatalytic hydrogen generation compared to bulk-gCN and exfoliated gCN.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Biochemistry & Molecular Biology
Lu Liu, Risong Na, Lianjuan Yang, Jixiang Liu, Yingjia Tan, Xi Zhao, Xuri Huang, Xuecheng Chen
Summary: The drug development process faces challenges of low success rates and high costs. The traditional one drug-one target approach is inadequate for treating multifactorial diseases. This study developed a pipeline combining machine learning, interpretative models, and molecular dynamics simulations to predict active compounds and fragments for the treatment of B-cell lymphoma. The results identified a potential multitarget inhibitor with acceptable drug properties.
Review
Biochemistry & Molecular Biology
Xuecheng Chen, Yuping Wu, Rudolf Holze
Summary: The most significant advantage of supercapacitors is their high stability in terms of lifetime, charge/discharge cycles, and other stability-related properties, along with their high current capability. However, actual devices often experience a deterioration in performance parameters over time and use. This review comprehensively addresses the causes at material, component, and device levels, while also discussing modeling approaches and suggestions for slowing down aging and degradation.
Article
Nanoscience & Nanotechnology
Karolina Wenelska, Anna Dymerska, Ewa Mijowska
Summary: Recently, a facile and scalable fabrication method of a rod-like structure composed of molybdenum disulfide and carbon (MoS2/C) has been demonstrated, showing superior oxygen evolution performance in an alkaline medium. The stability tests have proven that MoS2/C can be successfully used as robust noble-metal-free electrocatalysts. The presence of Fe species also contributes to the observed excellent OER performance.
Article
Chemistry, Applied
Anna Dymerska, Bartosz Sroda, Krzysztof Sielicki, Grzegorz Leniec, Beata Zielinska, Rustem Zairov, Renat Nazmutdinov, Ewa Mijowska
Summary: This study demonstrates that the deposition of ultrasmall amounts of nickel(II) nitrate in zeolitic imidazolate framework-67 (ZIF-67) can enhance the electrocatalytic performance of the framework, particularly in the oxygen evolution reaction (OER). The modified ZIF-67 shows increased specific surface area, reduced overpotential, lower Tafel slope, and excellent overpotential retention. The introduction of nickel(II) dimers in the modified ZIF-67 contributes to the enhanced electroactivity, as revealed by electron paramagnetic resonance measurements and density-functional theory calculations.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Krzysztof Cendrowski, Karol Federowicz, Mateusz Techman, Mehdi Chougan, Tomasz Kedzierski, Myroslav Sanytsky, Ewa Mijowska, Pawel Sikora
Summary: Incorporating metal oxide nanoparticles into cement-based composites delays the hydration process and strength gain of cementitious composites. However, by synthesizing core-shell structures, the performance of bismuth oxide and gadolinium oxide particles in cementitious systems can be improved.
Article
Chemistry, Multidisciplinary
Klaudia Zielinkiewicz, Daria Baranowska, Ewa Mijowska
Summary: In this study, a facile and scalable fabrication route for borophene was explored using ball milling. The optimal ball milling conditions were determined, resulting in the successful fabrication of thin few-layered borophene. The mechanical energy and heat generated during ball milling affected the structure of borophene, leading to the discovery of different crystalline phases. This research opens up new possibilities for fundamental studies and practical applications of borophene.
