Nanomaterials
·
2022
·Vol. 12
·期 7
·1142
·
IF 5.719
Mei Wan,Congling Shi,Xiaodong Qian,Yueping Qin,Jingyun Jing,Honglei Che
In this work, a novel functionalization strategy for ZIF-67-modified layered MXene was proposed, aiming at improving the fire safety of thermoplastic polyurethanes (TPU). The ZIF-67@MXene was verified by microscopic morphology, elemental composition, functional group species and crystal structure, and then the successfully prepared ZIF-67@MXene was introduced into the TPU material. When ZIF-67@MXene content was only 0.5 wt%, the peak heat release rate, total heat release rate, peak smoke release rate, total smoke release rate, and CO yield of the TPU/ZIF-67@MXene composites were reduced by 26%, 9%, 50%, and 22%, respectively, compared with the pure TPU. The thermogravimetric tests showed that the residual char of TPU/ZIF-67@MXene composites was the most in all samples. In short, the high-quality carbon layer of TPU/ZIF-67@MXene composites acts as a physical barrier to the transfer of heat and toxic gases, greatly improving the flame retardant properties of the TPU polymer.Keywords:metal-organic framework ZIF-67;MXene;fire safety;thermoplastic polyurethanes
研究领域:
材料科学
·
高分子科学
·
防火工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Yue Xu,Yong Qiu,Chentao Yan,Lubin Liu,Miaojun Xu,Baoti Xu,Bin Li
In engineering application area, it has always been a challenge to simultaneously improve flame-retardant performance and crystallization rate of polylactic acid (PLA) biomaterials, thus restricting their extensive application. In this work, a multifunctional additive (4,4′-(phenylphosphoryl)bis(piperazine-4,1-diyl))bis(diphenylphosphine oxide) (PDPO) was successfully synthesized and used to fabricate flame retardant PLA biocomposites. The crystallization behavior, fire safety, mechanical properties and flame retardant mechanisms of PLA biocomposites were studied in detail. The results indicated that PDPO notably improved the crystallization rate and crystallinity of PLA biocomposites. When 4 wt% PDPO was incorporated, PLA/PDPO biocomposites successfully passed UL-94V-0 grade and their LOI values were improved from 19.0% of pure PLA to 29.4%. The introduction of PDPO promoted the premature degradation and carbonization of PLA substrate, and inhibited the transesterification of the PLA during thermal pyrolysis process. Besides, PDPO decomposed and produced the Ph and PO , which efficiently exerted the free radical trapping effect in vapor phase. Therefore, the spread of fire for PLA/PDPO was declined and even self-extinguished. Meanwhile, the low addition of PDPO presented little effect on the mechanical properties of PLA composites. This flame retardant PLA biocomposites showed broad application prospects in emerging fields such as electronic devices, automobiles, and 3D printing materials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Hengrui Wang,Yue Jiang,Zhewen Ma,Yongqian Shi,Yanjun Zhu,Ruizhe Huang,Yuezhan Feng,Zubin Wang,Min Hong,Jiefeng Gao,Long-Cheng Tang,Pingan Song
MXene aerogels have shown great potential for many important functional applications, in particular electromagnetic interference (EMI) shielding. However, it has been a grand challenge to create mechanically hyperelastic, air-stable, and durable MXene aerogels for enabling effective EMI protection at low concentrations due to the difficulties in achieving tailorable porous structures, excellent mechanical elasticity, and desired antioxidation capabilities of MXene in air. Here, a facile strategy for fabricating MXene composite aerogels by co-assembling MXene and cellulose nanofibers during freeze-drying followed by surface encapsulation with fire-retardant thermoplastic polyurethane (TPU) is reported. Because of the maximum utilization of pore structures of MXene, and conductive loss enhanced by multiple internal reflections, as-prepared aerogel with 3.14 wt% of MXene exhibits an exceptionally high EMI shielding effectiveness of 93.5 dB, and an ultra-high MXene utilization efficiency of 2977.71 dB g g −1 , tripling the values in previous works. Owing to the presence of multiple hydrogen bonding and the TPU elastomer, the aerogel exhibits a hyperelastic feature with additional strength, excellent stability, superior durability, and high fire safety. This study provides a facile strategy for creating multifunctional aerogels with great potential for applications in EMI protection, wearable devices, thermal management, pressure sensing, and intelligent fire monitoring.
研究领域:
材料科学
·
电子工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2025
·
IF 4.2
Jianjian Luo,Keqing Zhou,Yan Ding,Lian Yin,Yanan Hou
Prior to the practical application of epoxy resins (EP), critical issues regarding the fire safety of flammable and toxic smoke releases must be addressed. Here, novel nanoarchitectonics with dual self-antiaggregating structure were fabricated in which CeO 2 nanoparticles were grown in situ on molybdenum disulfide (CeO 2 -MoS 2 ). CeO 2 alleviated the re-agglomeration of MoS 2 , and then CeO 2 -MoS 2 further mitigated the reunification effect of zeolite imidazolate framework-8 encapsulated ammonium polyphosphate (APP@ZIF-8) in the EP matrix. When CeO 2 -MoS 2 was employed as a synergist to replace 0.5 wt% of APP@ZIF-8 flame retardant, the thermal stability of EP composites was significantly improved, as evidenced by a 41.8% reduction in the maximum mass loss rate compared with pure EP. In addition, the PHRR, PSPR, PCO, and PCO 2 values of EP/0.5C-M/9.5A@Z were decreased by 65.8%, 47.9%, 67.0%, and 67.4%, respectively, while its LOI value improved to 28.2%. Benefit from the barrier and catalytic effect of CeO 2 -MoS 2 nanoarchitectonics, in conjunction with the subsequent formation of multiple metal oxides and phosphorus-containing substances that form an expanding char layer, preventing the heat-mass exchange and smoke diffusion. This research suggests a feasible solution to the problem of high fire hazards in EP.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Wei Cai,Tianyang Cui,Liangyuan Qi,Junling Wang,Wei Wang,Chengfei Cao,Shuo Shi,Xin Hu,Mohammad Ziaur Rahman,Weiyi Xing,De-Yi Wang,Bin Fei
In modern architecture, windows are increasingly employed as curtain wall structures, playing a critical approach in regulating indoor environments to reduce building energy consumption. Meanwhile, the demands for transparency and flame retardancy present significant challenges in guaranteeing people's privacy and safety. In response, a two-layer “smart window” is designed to achieve thermal management, privacy protection, and fire safety, through leveraging the photo-thermal effect of MXene nanosheets, the phase change characteristic of fatty alcohol, and the flame-retardant effect of tetrabromobisphenol A (TBBPA). In the daytime, MXene not only absorbs solar energy to mitigate its heating effect on indoor temperatures and achieve an average decrease of ≈4.2 °C but also facilitates the melting of fatty alcohol to provide optimal daylighting conditions (transmissivity of 65.0%). In the nighttime, the solidified fatty alcohol prevents light transmittance (modulation of 30.6%) and significantly enhances the light deviation to protect personal privacy. Besides, TBBPA dissolved in fatty alcohol effectively enhances the fire safety performance of “smart windows” without sacrificing the transparency. Most importantly, the manufacturing approach is extremely simple to present significant advantages compared to other “smart windows”, promoting its practical application in emerging buildings in terms of energy saving, privacy protection, and fire safety.
研究领域:
材料科学
·
能源工程
·
建筑技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Wenzong Xu,Xiaoling Wang,Xiongjie Wu,Wu Li,Chuanming Cheng
Fire safety is very important in the application of epoxy resin (EP). To study the effect of fire safety, a new kind of double-modified graphene (F-RGO-CuMoO 4 ) was synthesized in this work. Firstly, GO was modified with 3-Triethoxysilylpropylamine (KH550) through the amidation reaction between the amino and carboxyl group to obtain organic functionalized graphene F-RGO. Subsequently, CuMoO 4 was introduced onto the surface of F-RGO by the electrostatic interaction . Then the prepared F-RGO-CuMoO 4 was added into EP to prepare an EP composite. The TEM test results of the EP/F-RGO-CuMoO 4 ultrathin section showed that F-RGO-CuMoO 4 was well dispersed in EP, indicating that the dispersion of graphene in EP was obviously improved after double modification. In addition, F-RGO-CuMoO 4 also effectively improved the fire safety of EP. Specifically, the total heat release (THR), peak heat release rate (PHRR), total smoke production (TSP) and smoke production rate (SPR) values of the EP/F-RGO-CuMoO 4 composite were reduced to 33.4 MJ/m 2 , 504 kW/m 2 , 24.5 m 2 and 0.27 m 2 /s, which were 43.7%, 59.9%, 62.3% and 66.7% lower than those of pure EP, respectively. The main fire safety mechanism of F-RGO-CuMoO 4 was explored according to the char residue analysis.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xiaorong Guo,Xiaobei Li,Yifang Hua,Jun Sun,Hongfei Li,Xiaoyu Gu,Sheng Zhang
The development of high-performance flame-retardant epoxy resins (EP) has attracted increasing attention. This work aims to address the concern for efficient and eco-friendly EP with enhanced fire resistance by synthesizing a novel phosphorus-nitrogen flame retardant, APDP. The flame retardant was synthesized through a one-step, solvent-free reaction between dimethyl methylphosphonate (DMMP) and aminoethylpiperazine (AEP). When only 2 wt.% of APDP was incorporated into EP, it significantly improved fire safety, achieving a limiting oxygen index (LOI) of 33.2% and a V-0 rating in the UL-94 test. Cone calorimetry tests (CCT) showed a 40% reduction in total heat release (THR) and a 26% reduction in total smoke release (TSR) compared to the control EP sample. Additionally, APDP improved the storage modulus and glass transition temperature of the EP composite, and enhanced its mechanical properties, with tensile strength increased by 5.6%, impact strength by 58.5%, and shear strength by 15.5%, while preserving the transparency of the EP samples. This work underscored the potential of APDP as an eco-friendly solution for improving both the flame retardancy and mechanical properties of epoxy resin, aiming to address critical fire safety challenges across various industry areas.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 4
·725
·
IF 4.967
Huali Zhang,Lingzi Jin,Hanjun Wu,Zhenyue Zhang,Junxia Yu,Wenjun Zhang,Yi Pan,Zhiquan Pan
Phosphate tailings (PTs) are solid waste, which is produced by phosphate flotation. In this work, PTs were used as raw materials for the preparation of diethylenetriamine pentamethronic acid (DTPMP) intercalated trimetal (Ca-Mg-Al) layered double hydroxides (TM-DTPMP LDHs) by co-precipitation method. TM-DTPMP LDHs were characterized by X-ray diffraction, fourier-transform infrared spectroscopy, scanning electron microscopy, differential thermal gravimetric analysis, X-ray photoelectron spectroscopy and applied as a flame retardant to improve the fire safety of epoxy resin (EP). The results showed that the composite materials exhibited obvious layered structure. After intercalation, layer spacing increased from 0.783 to 1.78 Å. When the amount of TM-DTPMP LDH in EP was 8%, the limitted oxygen index of the composite material increased from the original 19.2% to 30.2%. In addition, Cone calorimeter (CC) and Raman spectrum results indicated that with the addition of TM-DTPMP LDHs, the value of heat release rate peak (pHRR) and total heat release (THR) were reduced by more than 43% and 60%, while the value of smoke formation rate (pSPR) and the total smoke production (TSP) decreased nearly 64% and 83%, respectively. The significant reduction in the release of combustion heat and harmful smoke during EP combustion may be attributed to the synergistic flame-retardant effect between hydrotalcite and DTPMP. This work exhibited great potential for the green recycling of PTs and the enhancement of the fire safety of EP.Keywords:phosphate tailings;layered double hydroxides;epoxy resin;fire safety
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 4
·e54842
·
IF 3
Junwei Li,Qiuju Ma,Quanyi Liu,Penglun Zheng
To further enhance the fire safety of epoxy resins, a phosphorus–nitrogen synergistic flame retardant (DPVHD) with a flexible chain segment and a nitrile group was synthesized. In addition to the traditional flame retardant elements P and N, the flame retardancy of the epoxy composites is further enhanced by the cross-linking effect of the nitrile groups introduced to form an interpenetrating network with the epoxy matrix. The results showed that the sample with 10 wt% DPVHD-10/EP had a LOI of 32.3% and passed the UL-94 V-0 rating, with PHRR and THR reduced by 15.4% and 47%, respectively, compared to pure EP. It is worth noting that the introduction of flexible chain segments improves the flexural properties of the epoxy resin matrix. Compared with pure epoxy, the flexural properties of epoxy-cured compounds with DPVHD addition show a rising trend with the increase of flame-retardant additive. And the rise of DPVHD-10/EP reaches 33.6%, which greatly reduces the negative effect of flame-retardant additives on the mechanical properties of the epoxy resin matrix. This work therefore provides new ideas for exploiting the advantages of phosphorus-nitrogen synergy and nitrile-based cross-linking for flame retardancy in epoxy resins.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Yue Xu,Chentao Yan,Chunlin Du,Kai Xu,Yixuan Li,Miaojun Xu,Serge Bourbigot,Gaelle Fontaine,Bin Li,Lubin Liu
Petrochemical-based foam materials are extensively used in insulation and energy storage fields. However, their non-degradability and high flammability have caused great pressure on energy, environment and human life and property safety. It is urgent to carry out research on biodegradable and fire safety alternative biomaterials. Herein, inspired by the natural hollow insulation animal hair, the 3D network structure of tubular aerogel was constructed by using the hollow kapok fibers (KF), the binder polyvinyl alcohol (PVA) and the flame retardant crosslinker biguanide phosphonate (BGP). The multifunctional tubular aerogel integrating thermal insulation , high strength and fire safety was successfully prepared by freeze-forming and freeze-drying. Due to the intermolecular hydrogen bonding and the high viscosity of binder, KF maintained a high filling, full component and high value utilization. Compared to pure KF, the thermal conductivity of KF-PVA-BGP aerogel was reduced to 0.0531 W m −1 K −1 and its compressive strength was improved to 1.64 MPa. Meanwhile, the incorporation of flame retardant cross-linker BGP promoted the degradation and charring of KF-PVA aerogel and released lots of inert gases during decomposition process , which effectively exerted the flame retardant effect in condensed and gas phases. Besides, compared with commercial PS insulation boards , KF-PVA-BGP composites are recyclable, sustainable and biodegradable in addition to their excellent thermal insulation and fire safety performance. This KF-PVA-BGP aerogel showed good application prospects for replacing traditional petrochemical-based materials in thermal insulation, energy storage and new energy fields.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 52
·2411029
·
IF 18.5
Qingtao Zeng,Xuejun Lai,Hongqiang Li,Zhonghua Chen,Xingrong Zeng,Liqun Zhang
The preparation of high-performance and fire-safe electrolytes for flexible quasi-solid-state supercapacitors is challenging. In this work, a novel fire-safe and multifunctional deep eutectic solvent gel (DESG) is fabricated using acrylic acid and urea as hydrogen bond donors and choline chloride as a hydrogen bond acceptor. DESG shows a high ionic conductivity (0.552 S m −1 ), good electrochemical performance (specific capacitance: 106.8 F g −1 ), and a wide operating temperature range (−20–90 °C), being a promising candidate for flexible solid-state supercapacitors. Furthermore, it exhibits a good thermoelectric conversion capability (Seebeck coefficient: 1.56 mV K −1 ), being ideal for thermoelectric capacitors and fire-warning sensors. The prepared DESG rapidly self-extinguishes after removal from fire, reaching a limiting oxygen index value of 38.0% and demonstrating its excellent flame retardancy. In addition, DESG has a good self-healing performance (healing efficiency of 84.3%). The work provides new insights into the preparation and application of high fire-safety and multifunctional eutectogels for flexible quasi-solid-state supercapacitors.
研究领域:
材料科学
·
能源存储
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingyi Lu,Bibo Wang,Pengfei Jia,Wenhua Cheng,Can Liao,Zhoumei Xu,Liang Cheng,Yuan Hu
Epoxy resin (EP) is widely used in the package of modern electronic products for thermal management, but the extremely flammability and toxicity release have restricted its further application. In this article, zinc hydroxystannate (ZHS) nanocubes were in-situ fabricated on the surface of titanium carbide (Ti 3 C 2 T x ) MXene nanosheets (ZHS@M) for improving the thermal management capacity of EP. Due to the phonon thermal conductance from ZHS and electron-hole thermal conductance of Ti 3 C 2 T x , the thermal conductivity was improved by 328% compared with the neat EP, which was benefit to dissipate heat for reducing the possibility of thermal disaster chain happening. Furthermore, owing to the 0D-2D hierarchical structure of ZHS@M, the fire safety and smoke suppression of these EP composites were highly strengthened. The peak heat release rate (pHRR) and total heat release (THR) decreased by 54.91% and 58.74%, respectively. Moreover, hazardous gases of EP during the combustion were also efficiently reduced, and the generation of carbon oxide (CO) and carbon dioxide (CO 2 ) were decreased by 44.44% and 39.46% when the additive of ZHS@M was only 2 wt%. As a result, ternary catalytic effect and labyrinth structure improved the safety of EP in the thermal runaway incidents. Besides, EP-2.0 ZHS@M exhibited excellent tensile robustness (64.71 MPa) and modulus (2.39 GPa), which regarded as a reliable supporting material for electronics in thermal management field. Hence, this hierarchical EP-ZHS@M composites provided the help of cleaning the thermal accumulation and increasing fire safety while facing thermal runaway, which was significant to destroy the formation of thermal disaster chain and further applications of the modern electrons and devices.
研究领域:
材料科学
·
热工程学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）