PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Shiyue Zhang,Xiaoqing Song,Wangjun Liu,Xiangxiang Zhai,Hongxin Gao,Qianhui Chong,Zhonglin Luo,Biaobing Wang
Polymer-based materials integrating high-performance flame retardancy with ultralong room-temperature phosphorescence (URTP) are highly desirable yet rarely achieved, especially for applications under harsh environmental conditions. In this work, a multifunctional small molecule (AFDOPO) was synthesized via a straightforward Atherton–Todd reaction between 2-aminofluorene and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and its influence on the comprehensive properties of epoxy resin (EP) was systematically investigated. With only 1.5 wt% AFDOPO loading (phosphorus content: 0.38 wt%), the EP/AFDOPO-1.5 composite exhibits outstanding fire safety, achieving a limiting oxygen index of 31.2 % and a UL-94V-0 rating along with significant reductions in heat release rate (18.6 %), total heat release (4.1 %), and total smoke production (15.4 %) relative to pristine EP. Remarkably, the composite also displays bright ultralong room-temperature phosphorescence, maintaining a visible afterglow for over 20 s. Even after 31 days of immersion in strong acid/base or 5 days of UV aging, the afterglow durations remain as long as 9 s and 7 s, respectively. This study offers a feasible strategy for designing high-performance URTP materials capable of functioning reliably in demanding environments.
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RSC Advances
·
2018
·Vol. 8
·期 47
·26563-26570
·
IF 2.936
Zhicai He,Zhengping Zhao,Shengwei Xiao,Jintao Yang,Mingqiang Zhong
Polymeric microcellular foams with high strength and light weight are very important for industrial applications. However, regulating their cell structure and their weak flame retardancy are problematic. We designed single-arm POSS-based ionic liquids ([bel-POSS][PF6]), and constructed hybrid composites based on physical interaction between ionic liquids and carbon-based materials in PS microcellular foaming. Ionization of bel-POSS could result in a quaternary ammonium reaction and ion-exchange reaction, and the carbon materials exhibit good dispersion through blending. The prepared hybrid composites showed high CO2 adsorption. Conical calorimeter tests showed that PS composite materials could reduce the heat release rate, total heat release, toxic gases (CO2 and CO) release, and amount of smoke generated. These carbon materials could affect PS micropore structure, including the cell diameter and density. Upon addition of 5 wt% of carbon materials, the hole diameter decreased by >50%, and the hole density increased nearly ten folds.
研究领域:
材料科学
·
化学工程
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高影响因子
Polymers
·
2021
·Vol. 13
·期 20
·3460
·
IF 4.329
Bingbing Leng,Jiayu Yang,Chunhui Zhu,Zhipeng Wang,Chengying Shi,Yang Liu,Hongyan Zhang,Wenge Xu,Baijun Liu
A cyclophosphazene derivative containing multiple cyano groups, denoted as hexa(4-cyanophenoxy)cyclotriphosphazene (CN-CP), was synthesized by a one-step nucleophilic substitution reaction for a phosphorus-nitrogen flame retardant. To meet the strict requirement of safe and environment-protective insulation materials, a series of composites based on low-density polyethylene-poly(ethylene-co-vinyl acetate) containing CN-CP/Mg(OH)2/Al(OH)3organic-inorganic synergistic flame retardants was fabricated. High-energy electron beam irradiation was subsequently applied to obtain a halogen-free flame-retardant crosslinked system. The relationship between crosslinking degree and irradiation dose was studied, and crosslinking degrees ranging within 63–85% were obtained under 100–190 kGy. Furthermore, the effects of CN-CP filler and irradiation dose on the properties of the composites were carefully investigated. The maximum tensile stress and limiting oxygen index values of most composites irradiated by EB were more than 15 MPa and 28%. Results revealed that the obtained materials had excellent thermal and mechanical, flame-retardant, and insulation properties, thereby suggesting their promising prospects for wire and cable applications.Keywords:EB-irradiation;cyclophosphazene derivative;crosslinked networks;flame retardancy;wires and cables
研究领域:
材料科学
·
化学工程
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PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Zhijie Fan,Heng Xu,Zhen Liu,Xiandie Zhang,Xuxu Cui,Jie Ji,Haozhe Li,Xiaode Guo
Novel elastomers offer new opportunities to develop multifunctional materials in terms of combining mechanical strength, room-temperature self-healing properties and recyclability. However, self-healing polymers have high mechanical strength at high internal cross-linking density, but restrict the movement of molecular chain segments leading to reduced self-healing efficiency. The presence of microphase-separated structures makes the polymers poorly efficient for repair at room temperature. In this paper, a multiphase hydrogen bonding (H-bonding) strategy is used to introduce an aliphatic ring into the system to form a repeating unit with the hard segments, as well as a bis-benzene ring structure with a methylene linkage to disrupt the crystallization of the hard domains. Specifically, PUPI-M 2 I 3 has a mechanical tensile strength of 17.93 MPa, an excellent tensile ratio of 1109.88 %, the sample can recover 95.93 % at room temperature after 24 h of fracture and stretching, with excellent room temperature self-healing performance and recyclability. Meanwhile, the self-healing flame-retardant material based on PUPI-M 2 I 3 is developed by comprehensive consideration, which opens a new way for the research and development of flame-retardant materials.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2016
·
IF 3.652
Zhijing Wang,Yinfeng Liu,Juan Li
The toxicity, environmental persistence and bio-accumulation of flame retardant additives have attracted a lot of attentions for several years. People try to develop perfect strategy to achieve green flame retardant materials. Bio-based flame retardants are one of the most environmentally friendly alternatives, but lots of natural resources are thermal unstable. Therefore, it is important and necessary to modify the performance of biological raw materials by using physical or chemical methods to meet the requirements of flame retardant materials. In this paper, biological element-nucleotide was embedded in the backbone of melamine fomaldehyde resin to form a functional microsphere (MFA). The MFA was employed in polypropylene (PP)/intumescent flame retardant (IFR) system to modify its flame retardant performance. The flammability of PP composites was evaluated by using the limiting oxygen index (LOI) and UL-94 vertical burning tests etc. The results showed that PP composites containing 17 wt% IFR and 1 wt% MFA achieves a LOI value of 27.0 and passes the UL-94 V-0 rating, while no less than 25 wt% single IFR is needed to obtain the same UL-94 rating. Furthermore, the MFA delays the time to the peak heat release rate (PHRR) and decreases 65% for PHRR. This paper provides a novel approach for constructing a bio-based IFR system and opens another door for the applications of bio-resources in flame retardant materials meanwhile.
研究领域:
材料科学
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环境科学
·
生物学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jie Zhang,Hui-Yuan Zhang,Wen-Rong Xu,Yu-Cang Zhang
Efficient utilization of natural biomass for the development of fireproof materials and next-generation sensors faces various challenges in the field of fire safety and prevention. In this study, renewable sodium alginate (SA), TEMPO-oxidized chitin nanocrystals (TOChNs), and MXene nanosheets were employed to fabricate a sustainable, flexible, and flame-retardant composite biofilm, donated as STM, utilizing a simple and environmentally friendly evaporation-induced self-assembly technique. The incorporation of SA , TOChNs, and MXene in a weight ratio of 50/10/40 led to improved mechanical properties of the resulting STM-40 films, as evidenced by increased tensile strength and Young's modulus values of approximately 36 MPa and 4 GPa, respectively. Notably, these values were approximately 3 and 11 times higher than those observed for the pure SA film. Moreover, the STM-40 films demonstrated highly sensitive fire alarm capabilities, exhibiting a superior flame alarm response time of 0.6 s and a continuous alarm time of approximately 492 s when exposed to flames. The STM exhibited exceptional flame retardancy due to the synergistic carbonization between MXene and SA/TOChNs, resulting in a limiting oxygen index of 45.0 %. Furthermore, its maximum heat release rate decreased by over 90.1 % during the test. This study presents a novel approach for designing and developing fire-retardant fire alarm sensors by utilizing natural biomass.
研究领域:
材料科学
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生物材料
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消防安全
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Wenqiang Hu,Wenbin Fu,Samik Jhulki,Liang Chen,Aashray Narla,Zhijian Sun,Fujia Wang,Alexandre Magasinski,Gleb Yushin
Poor heat/flame-resistance of polyolefin (e.g., polyethylene and polypropylene) separators and high flammability of organic electrolytes used in today's lithium-ion batteries (LIBs) may trigger rare yet potentially catastrophic safety issues. Here, we mitigate this challenge by developing a heat-resistant and flame-retardant porous composite membrane composed of polyetherimide (PEI) and Al 2 O 3 nanowires (NWs). The membranes are fabricated based on an industrially scalable non-solvent-induced phase separation process, which results in an intimately interconnected porous network of Al 2 O 3 NWs and PEI . The produced composite membranes exhibit excellent flexibility, thermal stability, and flame-retardancy. Importantly, the composite membranes exhibit minimal thermal shrinkage and superior tensile strength (16 MPa) at temperatures as high as 200 °C, significantly exceeding the performance of conventional polyolefin separators. Compared with commercial separators, their superior wettability and higher ionic conductivity (by up to 2.4 times) when filled with the same electrolyte, larger electrolyte uptake (∼190 wt.%), as well as improved cycle and rate performance demonstrated in LiNiMnCoO 2 (NCM)-based LIBs make them attractive choices for a variety of electrochemical energy storage devices.
研究领域:
材料科学
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电化学
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能源存储
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高分子科学
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纳米技术
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DOI
高影响因子
APPLIED ENERGY
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2024
·
IF 10.1
Mingyi Chen,Minghao Zhu,Luyao Zhao,Yin Chen
Phase change materials (PCMs) are susceptible to fire and may accelerate heat transfer when thermal runaway propagation (TRP) in lithium-ion battery (LIB) modules, requiring the design and safe use of insulation structures with excellent flame-retardant properties. In this work, the sandwich structure composed of flame-retardant phase change material (FRPCM) combined with aerogel felt (AEGF) is used to study the inhibitory effect on TRP of pouch battery modules (BMs). The structural materials are applied between cells, and the changes of temperature, voltage, mass and other parameters in the TRP process are analyzed by changing the thickness of FRPCMs and AEGFs, and the changes of heat flux of materials were also qualitatively analyzed. The results show that the increase of FRPCM and AEGF thickness can increase the interval time of TRP and reduce the overall thermal risk of the BMs. Compared to Test-1, the increase in TRP time between cells 1 and 2 in Test-2 to Test-5 ranged from 52.7% to 358.7%, and the longest thermal runaway interval reached 844 s. Both the structural materials in Test-6 and Test-7 block the TRP. Combining the thermal conductivity of PCMs and the thermal insulation properties of AEGFs, this work can effectively conduct heat to the environment and block the TRP when applied to BMs, which provides a valuable reference for efficient inhibition and blocking of TRP.
研究领域:
电化学储能
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热安全工程
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材料科学
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能源系统安全
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电池技术
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DOI
高影响因子
Polymer Chemistry
·
2023
·Vol. 14
·期 19
·2317-2325
·
IF 4.6
Wenjing Kong,Jiaqi Sun,Muyao Gao,Tianhao Li,Ming Liu,Yujie Song
Phthalonitrile resins as a unique class of high-performance materials have attracted increasing interest in wide application fields including aerospace, electronic packaging and flame-retardant materials. In this article, the boron element was incorporated into phthalonitrile resins to improve the processibility and thermal stability. The synthetic borate and aryl borate-modified resorcinol-based phthalonitrile monomers (BPN and PBPN) showed lower melting points than traditionally employed RPN. The presence of hydroxyl groups leads to autocatalytic curing behavior of BPN and PBPN. Due to the presence of the boron-branched structures in the polymer backbone of the modified phthalonitrile resins, these resins exhibited better thermal stability than traditionally investigated RPN and their mechanical properties are stable over a wide temperature range, which is crucial in service under harsh environments. The results suggest that boron-modified phthalonitrile resins possess great potential in the field of high-temperature resistant materials.
研究领域:
材料科学
·
化学工程
·
航空航天工程
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高分子科学
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DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Feng Rong,Nannan Song,Long Xiang,Zhongwei Chen,Kai Wang,Tingting Chen,Yuan Yu,Juncheng Jiang
Self-healing polymers, polyurethane (PU) elastomers, demonstrate immense application potential due to their remarkable ability to prolong material lifespan and conserve resources. Nevertheless, resolving the conflict between self-healing capacity, mechanical strength, and high flammability remains a pressing challenge for these materials. Furthermore, the inherently high flammability of PU materials poses serious fire hazards, severely limiting their practical applications. To address these challenges, a novel flame-retardant and self-healing PU elastomer was developed by incorporating a bio-based monomer, GVD containing phenolic hydroxyl groups and phosphaphenanthrene moieties and adipic dihydrazide into the PU backbone. The resulting elastomer exhibited excellent tensile strength (12.11 MPa) and high toughness (58.56 MJ/m 3 ), attributed to the multiple extensive hydrogen bonding interactions within the molecular chains. Following thermal healing at 80 °C for 5 h, the material achieved a healing efficiency exceeding 95 %. Additionally, compared to the non-flame-retardant IPDG-0, the flame-retardant IPDG-0.5 displayed a 50.6 % reduction in peak heat release rate and a 16.3 % decrease in peak carbon monoxide emission rate, confirming its improved flame retardancy. This research not only advances the synthesis of multifunctional PU elastomers but also provides a valuable strategy for developing self-healing materials with intrinsic flame retardancy, thereby expanding their potential applications.
研究领域:
材料科学
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高分子化学
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消防安全工程
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自修复材料
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可持续化学
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DOI
高影响因子
Functional Materials Letters
·
2025
·
IF 1.1
Lejuan Cao,Jing Li,Jie Huang,Jiachen Lei,Siqi Zheng
Inorganic aerogels have promising applications in thermal insulation of buildings or industries due to their low thermal conductivity and good thermal stability. In this paper, magnesium borate whiskers (MBOWs) and polyvinyl alcohol (PVA) are used to prepare PVA/MBOWs aerogels by self-assembly combined with freeze-drying technique. The PVA/MBOWs aerogels develop a new synthesis route and composite aerogels system for a wide range of short fibre scaffolds. The well-developed laminar-like pore structure is obtained with the average pore size of about 100-200 nm. The aerogels show good thermal insulation properties with a low thermal conductivity of about 0.03 W/(m·K). Thermal insulation better than commercial thermal insulation, layer clay aerogels, the average temperature difference can reach 5.7 ° C. In addition, through the formation of thermal insulation coke layer in the combustion/non-combustible gases/cooling flame retardant synergistic mechanism, to achieve a good fire retardant effect. Moreover, the maximum stress at 0.6 mm/mm strain is 1.8 MPa, which indicates that the aerogels have better mechanical properties. The combination of these properties makes PVA/MBOWs aerogels an effective and practical candidate for building insulation.
研究领域:
材料科学
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高分子科学
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热绝缘
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阻燃材料
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纳米材料
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Dongyu Hou,Wenchao Zhang,Baichuan Jia,Mingze Zhang,Yuanhang Yao,Ji Liu,Rui Zhang,Qiang Fu,Dong Yue,Yu Feng
The widespread application of epoxy resin (EP) in potting materials for power equipment is limited by its inherent brittleness and potential fire hazard. With the rapid advancement of power equipment toward higher voltage levels and greater capacities, this issue has become increasingly critical. Consequently, the development of EP insulating materials with enhanced flame retardancy and improved toughness is urgently needed. However, improving flame retardancy often leads to a compromise in mechanical performance. In this work, a novel microencapsulated compound, Si(HT), a phosphonitrile compound based on a triazine-rich framework, was introduced to enhance the flame retardant, smoke suppression, mechanical, and insulation properties of EP. The experimental results demonstrated that the incorporation of only 2% of the microcapsule core-shell structured Si(HT) significantly enhanced the limiting oxygen index (LOI) to 32% and enabled the material to achieve a UL-94 V-0 rating. Additionally, the AC breakdown strength increased by 58%–137.3 kV/mm, and the tensile strength improved by 14%–47 MPa, while maintaining excellent thermal stability, a low dielectric constant, and minimal dielectric loss. The synergistic effects of phosphorus, nitrogen, and silicon elements contributed to the significant improvement in the overall performance of EP. This study presents a viable strategy for broadening the application of epoxy resin in encapsulation materials for electrical equipment.
研究领域:
材料科学
·
聚合物复合材料
·
火灾安全工程
·
电气绝缘
·
阻燃材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）