Article
Chemistry, Physical
Seok Hyeon Kang, Jung-Kyu Jang, Hwan Yeop Jeong, Soonyong So, Sung-Kwon Hong, Young Taik Hong, Sang Jun Yoon, Duk Man Yu
Summary: In this study, a porous composite membrane based on polyacrylonitrile (PAN) and incorporating a phosphorus flame-retardant agent was fabricated for a heat-resistant and flame-retardant separator in lithium-ion batteries (LIBs). The membrane showed improved mechanical and thermal properties and exhibited excellent self-extinguishability, ensuring the high safety of LIBs. Additionally, the membrane demonstrated higher ionic conductivity and electrolyte uptake compared to a commercial polypropylene (PP) separator, making it a promising material for high-energy density and safe LIBs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Xinfang Zhang, Yoav Eichen, Zhenwei Miao, Shuangkun Zhang, Qing Cai, Wei Liu, Jingbo Zhao, Zhanpeng Wu
Summary: New polyimine vitrimers with excellent flame retardancy and high thermostability were developed. After three recycling cycles, the vitrimers still maintained over 90% recycling efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Kailun Zhang, Hongjuan Wu, Tian Wang, Meng Yao, Jixing Xie, Yunhong Jiao
Summary: A novel flame retardant PBFA was synthesized and mixed with PEPA to enhance the flame retardancy of polypropylene, achieving UL-94 V0 rating. The best performance was observed at a mass ratio of 2:1, significantly reducing heat release rate, total heat release, and smoke production. FTIR analysis showed that the IFR mechanism mainly operated in the condensed phase.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Applied
Seyed Mohsen Seraji, Houlei Gan, Samuel R. Swan, Russell J. Varley
Summary: The epoxy amine resin developed for high pressure resin transfer moulding composite fabrication exhibits rapid curing, low viscosity, good thermal and mechanical properties, and excellent flame retardancy. The addition of HPCTP fire-retardant additive results in only a small increase in viscosity, while achieving a V0 rating and a high LOI in the UL-94 test.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Materials Science, Paper & Wood
Jian Liu, Zheng Zhang, Ling Sun, Chaohong Dong, Dezheng Kong, Shuai Wang, Zhou Lu
Summary: A new synergistic flame retardant (APCTSi) based on cyclic polysiloxane was successfully prepared and firmly bonded to cotton fabric through a chemical grafting method. The treated cotton fabric showed improved flame retardant properties in both condensed phase (forming stable char layer) and gas phase (releasing nonflammable gases).
Article
Polymer Science
Natalia Bornosuz, Roman F. Korotkov, Alexander A. Kolenchenko, Alexey Shapagin, Alexey Orlov, Irina Yu Gorbunova, Vyacheslav V. Kireev, Igor S. Sirotin
Summary: This study investigated the influence of phosphazene modifiers with different substituents on the curing process, thermal properties, and flammability of benzoxazine resin. It was found that the addition of these modifiers decreased the glass transition temperature and thermal stability of the polymers, while improving flame resistance. The catalytic activity of the phosphazene compounds varied depending on the substituents, with m-toluidine substitutions showing the lowest activity.
Article
Chemistry, Applied
Ge Zhang, Yanli Dong, Meng Yao, Yumeng Cui, Weihua Meng, Shanshan Wang, Hongqiang Qu, Jianzhong Xu
Summary: A novel metal-organic framework (Zn-MOF) containing phosphazene ring and Zn2+ was synthesized and it was found that adding 9 wt% solvent removed Zn-MOF (SR-Zn-MOF) significantly reduced the peak heat release rate (PHRR), peak smoke production rate (PSPR), peak CO production (PCOP), and CO2 production (CO2P) of epoxy resin composites. The thermal decomposition of the organic ligands in Zn-MOF promotes the carbonization of the epoxy resin matrix and generates non-flammable gases, such as NH3 and CO2, which dilute the concentration of combustible fuel and O2 in the gas phase. Therefore, Zn-MOF shows excellent flame retardant and smoke suppression effects on EP.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Engineering, Chemical
Meng Pei, Ke Wei, Daohai Zhang, Shuhao Qin
Summary: In this study, a phosphazene flame retardant (DOPO-PHBA) was synthesized and added to PLA with epoxy chain extender (ECE) to prepare PLA/ECE/DOPO-PHBA flame-retardant composites. The results show that when 5wt% DOPO-PHBA is added, the PLA composites can achieve V-0 level combustion with an LOI value of 30.0%, and the LOI value increases from 22.5% to 33.6% with the increase in flame-retardant content. Furthermore, the PLA composites still maintain good mechanical properties, and the flame-retardant mechanism involves free radical quenching, gas dilution, and thermal barrier caused by the carbon layer.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Qiaoran Zhang, Lei Ma, Tiantian Xue, Jing Tian, Wei Fan, Tianxi Liu
Summary: This study introduces a novel double-layer smart textile made of polyimide aerogel fiber, which combines excellent fire resistance with thermal regulation. The outer layer reduces peak heat release rate, exhibiting outstanding fire resistance, while the inner layer delays temperature rise during phase change, providing cool somatosensory temperature for firefighters. The double-layer textile extends the time to pain threshold of human skin, showing great potential for next-generation firefighting clothing.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Wenjing Xia, Siwen Wang, Hao Wang, Tao Xu
Summary: The study confirmed new compositional formulation proportions for a sustainable and efficient composite flame retardant (CFR) of bituminous materials. The inhibitory effects of CFR on the non-isothermal combustion kinetics characteristics of bitumen were discussed, showing comprehensive and synergistic flame retarding effects due to dilution, cooling, and insulation. Additionally, the CFR efficiently suppressed the dynamic release process of various volatile constituents during bituminous combustion, providing an efficient and green flame retardant for bituminous materials when exposed to a fire.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Paper & Wood
Ling Sun, Yutong Xie, Jiamin Wu, Huixin Wang, Shihao Wang, Wennan Li, Jiaojiao Zhang, Zheng Zhang, Ping Zhu, Zhou Lu, Chaohong Dong
Summary: A novel flame retardant ADBSPA containing phosphorus and nitrogen elements was prepared by continuous chemical method. Coating cotton materials with ADBSPA increased the LOI value and reduced the damaged length, enhancing the anti-burning ability. Additionally, SEM analysis showed that the coated samples maintained a complete fiber skeleton after burning, indicating good thermal stability.
Review
Engineering, Multidisciplinary
Xiao-Hui Shi, Xue-Lin Li, Ying-Ming Li, Zhi Li, De-Yi Wang
Summary: Fiber reinforced polymeric composites (FRPCs) have been widely used in various industries, but their flammability poses significant risks. To enhance their flame retardancy, suitable treatments have been carried out, and the flame retardant mechanism has been studied. Further development is needed to improve the effectiveness of flame retardation techniques.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Applied
Jun Yuan, Yadong Wang, Hao Wang, Shengchao Huang, Hua Deng, Wenhui Rao, Xuebao Lin, Zongmin Zhu
Summary: In this work, transparent, mechanically strengthened, flame retardant and smoke suppression epoxy resin composites were prepared by adding an indole/phosphaphenanthrene-based compound. The results showed that the addition of 5% IDT increased the limiting oxygen index and achieved a UL-94 V-0 rating. The EP/IDT5 composite also exhibited reduced smoke production and peak heat release. The flame-retardant mechanism of EP/IDT was explored and the presence of 7C-7C conjugation and hydrogen bonds improved the bending and tensile strengths. This work provides a promising approach to meet the multifunctional requirements of EP composites.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Polymer Science
Wei Peng, Shi-bin Nie, Yu-xuan Xu, Wei Yang
Summary: The synthesis of tetra-DOPO compound enhanced the flame-retardant efficacy of epoxy thermosets without compromising their thermo-mechanical performances. The addition of 5.0 wt% of tetra-DOPO improved storage modulus, glass transition temperature, LOI, and UL-94 V-0 grade of the EP composite, demonstrating exceptional fire-retardant properties. The flame inhibition mechanism of tetra-DOPO was further elucidated through various tests, clarifying its role in both vapor and condensed phases.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Xiaoxia Wu, Xudong Zhang, Jingpeng Wu, Xiaodong Li, Hao Jiang, Xing Su, Meishuai Zou
Summary: This study systematically investigates FR/microcellular polyurethane elastomer (MPUE) composites, and finds that using expandable graphite as a flame retardant can significantly increase the vertical combustion grade and reduce fire risk, but it also decreases the tensile strength of the material.
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.