JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yan Zhang,Jin Yu,Jiayu Lu,Chenjie Zhu,Dongming Qi
Rapid growing of electronics has not only caused severe electromagnetic wave pollution, but also created a risk of fire and explosion. Therefore, developing ultralight, fire-resistant, high-performance electromagnetic interference (EMI) shielding materials are imperative but also challenging. Considering the outstanding metallic conductivity and high aspect ratio, 2D Ti 3 C 2 T x has been reported to be one of the most promising candidates for exhibiting excellent EMI shielding performance. Herein, we demonstrate a facile method to fabricate cellulose nanofiber (CNF)/ammonium polyphosphate (APP)/Ti 3 C 2 T x composite aerogels via a simple freeze-drying method. The resultant CNF/APP/Ti 3 C 2 T x composite aerogels exhibited excellent fire-resistance without obvious shrinkage when placed over the flame of an alcohol burner. Besides, the 8-mm-thick composite aerogel with 60% of Ti 3 C 2 T x showed an average EMI shielding effectiveness of 55 dB (specific EMI shielding effectiveness/thickness could be ~5729 dB cm 2 g −1 ) with an absorption-dominant mechanism. This performance is owing to the relative high electrical conductivity (12 S/m) and multiple reflections from the porous structure. These characteristics make the composite aerogel a much more competitive product for a high-performance EMI shielding material.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kaili Gong,Lian Yin,Congling Shi,Xiaodong Qian,Keqing Zhou
It is challenging that the functionalized MXene-based nanofillers are designed to modify the inherent flammability and poor toughness of epoxy polymeric materials and further to facilitate the application of EP composites. Herein, silicon-reinforced Ti 3 C 2 T x MXene-based nanoarchitectures (MXene@SiO 2 ) are synthesized by simple self-growth method, and its enhancement effects on epoxy resin (EP) are investigated. The as-prepared nanoarchitectures realize homogeneous dispersion in EP matrix, indicating well performance-enhancing potential. The incorporation of MXene@SiO 2 achieves improved thermal stability for EP composites with higher T -5% and lower R max values. Moreover, EP/2 wt% MXene@SiO 2 composites obtain a 30.2% and 34.0% reduction in peak heat release rate (PHRR) and peak smoke production rate (PSPR) compared to those of pure EP, respectively, also achieving a 52.5% fall in smoke factor (SF) values and increased yield and stability of chars. The dual char-forming effects of MXene@SiO 2 nanoarchitectures, including the catalytic charring of MXene and the migration of SiO 2 to induce charring, are accounted for the results, as well as lamellar barrier effects. Additionally, EP/MXene@SiO 2 composites achieve an enhanced storage modulus of 51.5%, along with improved tensile strength and elongation at break, compared to those of pure EP.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2022
·
IF 4.132
Hongni Wang,Xiaoqian Li,Fangfang Su,Jinliang Xie,Yangyang Xin,Weirui Zhang,Chen Liu,Dongdong Yao,Yaping Zheng
Despite many important industrial applications, epoxy resin (EP) suffers from high flammability and toxicity emission, extremely hampering their applications. To circumvent the problem, core–shell structured ZIF67@ZIF8 is successfully synthesized and further functionalized with phytic acid (PA) to obtain PA-ZIF67@ZIF8 hybrids. Then, it is used as an efficient flame retardant to reduce the fire risk of EP. The fire test results show a significant reduction in heat and smoke production. Compared with EP, incorporating 5.0 wt % PA-ZIF67@ZIF8 into EP, the peak heat release rate, total heat release, and peak carbon monoxide production are dramatically reduced by 42.2, 33.0, and 41.5%, respectively. Moreover, the EP/PA-ZIF67@ZIF8 composites achieve the UL-94 V-0 rating and the limiting oxygen index increases by 29.3%. These superior fire safety properties are mainly attributed to the excellent dispersion and the catalytic effect of metal oxide and phosphorus-containing compounds. This work provides an efficient strategy for preparing a promising ZIF-based flame retardant for enhancing flame retardancy and smoke toxicity suppression of EP.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2023
·Vol. 57
·期 6
·1467-1483
·
IF 3.4
Ba Zhichen,Liang Daxin,Xiao Zefang,Wang Yonggui,Wang Haigang,Xie Yanjun
In living spaces where wood is commonly used for both construction and decoration, it is crucial to minimize electromagnetic pollution and the risk of fire. In this study, we applied aniline treatment to wood in situ and examined its impact on electromagnetic shielding and fire resistance. By enabling in situ polymerization and the deposition of polyaniline particles within the wood, we enhanced the wood’s conductivity while maintaining its porous structure, thereby improving its ability to absorb microwaves. The results indicated that wood species with low density exhibited higher electromagnetic shielding efficiency after treatment due to their greater polyaniline loading. Specifically, an specific electromagnetic shielding efficiency up to 65.8 dB cm −3 g −1 was achieved on the cross sections of treated wood. Furthermore, the total heat release and smoke production decreased by 43.9% and 66.7%, respectively, while the wood char mass increased by 66.3%. The results demonstrated that polyaniline-treated wood with bifunctional features could serve as a promising candidate in this field.
研究领域:
材料科学
·
林学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 21
·12183-12197
·
IF 4.22
Wang Haitao,Zhang Yunpeng,Xue Fengxin,Bai Wenxia,Shi Xueting,Liu Yanhua,Feng Libang
Nowadays, it has become an imminent challenge of developing a robust and efficient oil/organic solvent absorbing/releasing along with oil–water separating material. Herein, a simple and environment-friendly one-step immersion method is developed for fabricating superhydrophobic carbon felts with extraordinary properties. The as-prepared superhydrophobic carbon felts reveal outstanding durability and stability even exposed to various harsh environments, such as acid, base, salt, organic solvent, and UV light for quite long time. The superhydrophobic carbon felts exhibit excellent fire resistance, and the materials can stand at least 5 times of ethanol-soaking and burning without marked influencing on the superhydrophobicity. Meanwhile, the resultant materials reveal outstanding oil adsorption and oil–water separation performance. The superhydrophobic carbon felt can still absorb 7 times its own mass of cooking oil even after 10 extrusion cycles. Moreover, the oil–water separation efficiency can still reach 98.85% after 10 times of separation. Consequently, the materials can be used in oil/organic solvent collection and oil–water separation successfully. Therefore, the simple, environment-friendly, cost-effective fabrication method together with the extraordinary durability and stability, excellent and efficient performance will find its potential applications in industrial production and environmental remediation. Graphical abstract A simple and environment-friendly one-step immersion method for fabricating superhydrophobic carbon felts is developed. The as-prepared superhydrophobic carbon felts reveal excellent fire resistance along with extraordinary durability and stability upon various harsh environments. Furthermore, the superhydrophobic carbon felts exhibit outstanding oil/organic solvent adsorption/releasing and oil–water separation performance.
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
Polymers
·
2018
·Vol. 10
·期 4
·441
·
IF 2.935
Weiqiu Wen,Jianwei Guo,Xi Zhao,Xiong Li,Hongmei Yang,Jem-Kun Chen
Considering the poor compatibility and water-resistance of sulfonate flame retardants for polycarbonate (PC), an efficient S/N-based flame retardant named 1,3,5,7-tetrakis(phenyl-4-sulfonyl-melamine)adamantane (ASN) has been developed. Fire properties studies of PC/ASN blends indicate that the addition of 0.10 wt % ASN imparts a V-0 rating and a limited oxygen index (LOI) value of 30.1% to PC specimens, and ASN can suppress the heat and toxic gas release of PC composites. Additionally, PC/ASN blends are believed to be exceptional materials for outdoor PC applications due to their superior water-resistance properties. Moreover, mechanical properties were further systematically investigated, and the correlative results indicate that the tensile strength and rigidity of specimens are improved with the addition of ASN.Keywords:flame retardant;adamantane;polycarbonate;fire properties;water-resistance
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Xinyu Cui,Jinxuan Chen,Weiwen Gu,Jian Liu,Hongfei Li,Xiaoyu Gu,Jun Sun,Sheng Zhang
Flame-retardant properties are crucial for polylactic acid (PLA) used in packaging, electrical, and agricultural applications. However, PLA is susceptible to degradation from ultraviolet (UV) light, limiting its longevity. This necessitates the development of PLA composites with improved flame-retardant and UV-resistant properties. Here, we synthesized a multifunctional core–shell spherical flame-retardant TA@HPDT, employing tannic acid (TA) for its effective free radical trapping capability. TA@HPDT was incorporated into PLA to enhance fire safety and UV resistance. The PLA-2 % TA@HPDT composite exhibited exceptional flame-retardant efficiency, achieving a UL-94 V-0 rating and a limiting oxygen index of 25.6. Furthermore, the addition of TA@HPDT reduced the peak heat release rate and total heat release by 16.8 % and 16.7 %, respectively. After 100 h of UV aging, the PLA composite retained 93.3 % of its mass, indicating significantly improved UV resistance. This study demonstrates a strategic approach to developing PLA composites that enhance fire performance and extend service life.
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
·
2022
·
IF 11.322
Lei Zhang,Zhi Li,Qing-Qing Bi,Lin-Yun Jiang,Xiao-Die Zhang,En Tang,Xue-Meng Cao,Hong-Fang Li,Jose Hobson,De-Yi Wang
The synchronized improvement of strength , toughness and fire suppression poses to be a critical trade-off issue towards high-performance epoxy resin. Aiming to impart epoxy with balanced multifunctional improvement, the Schiff base-derived bio-based phosphaphenanthrene small-molecule reinforcer towards in-situ constructed Diels-Alder network within existing 3D network was proposed. The incorporation of 3.5 wt% reinforcer (CQ-DOPO) concurrently enhanced the tensile and impact strength of epoxy by 26.6% and 48.4% without visible deterioration of transparency. The increment of glass transition temperature by 14 °C via dynamic mechanical analysis was observed. The underpinning experimental and simulation investigation verified the proof of concept of in-situ formed Diels-Alder sacrificing network towards higher crosslinking density and strong-weak dual network. Raman spectra witnessed the breaking of sacrificing bond during fracture. Moreover, 3.5 wt% CQ-DOPO with an ultralow phosphorous loading of 0.245 wt% enabled to impart epoxy with UL-94 V-0 rating as well as limiting oxygen index of 32.0%. The multi-scale dual-phase analysis unveiled the synchronized suppression of fire reactions in vapor phase via PO· quenching as well as in condensed phase via char microstructure optimization. Hence, the rational strategy via in-situ construction of Diels-Alder sacrificing bond toward dual network exploits a novel roadmap for high-performance epoxy.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shanshan Jia,Songlin Deng,Yao Lu,Yiqiang Wu,Yan Qing
As a new star of low carbon footprint material, wood with both superhydrophobic robustness and flame retardancy highly boosts its applications in various fields. However, these individual functionalities have conflicting requirements on the interfacial or bulky properties of its surface coating, especially in flammable organic adhesives (such as epoxy resin (EP) and polydimethylsiloxane (PDMS)) and nanoparticle systems. Therefore, breaking the conflicting requirement on adhesives is a crucial and challenging issue for achieving superhydrophobic robustness without impairing flame retardancy. In this work, a structure of three-dimensional (3D) flower-like hydrotalcite (HT) clusters isolated by hierarchical pores was proposed to resolve the conflicting demand. Such kind of structure was fabricated through a one-step thermally-driven method using HT, EP and perfluorooctyl triethoxysilane (PFOES). Benefitting from the release of gaseous ethanol from the inside of wood and its circulation flow among EP and HT during thermally driven process, the HT particles were bonded with small amount of EP and assembled as robust 3D flower-like HT clusters isolated by micro/nano sized pores, rather than embedded in a thick EP coating. This structure significantly reduced the use of flammable EP and increased the loading of flame retardant HT. Therefore, wood with boosting flame retardancy without compromising its own superhydrophobic robustness was achieved (herein named as HT/EP/PFOES wood). Cone calorimetry test showed that the HT/EP/PFOES wood had a 49.33% reduction in the peak of heat release rate (HRR) and a 34.51% reduction of total heat release (THR), which outperformed most of the existing flame retardants and superhydrophobic lignin-cellulosic materials. Meanwhile, its superhydrophobic robustness was not impaired. Together with a facile one-step thermally driven fabrication process, this structure of 3D flower-like HT clusters provided a new insight into fire retardant and robust superhydrophobic wood.
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
Advanced Sustainable Systems
·
2022
·Vol. 6
·期 12
·2200346
·
IF 6.737
Xiaohan Sun,Qianqian Yu,Zhaolin Yang,Senwei Hu,Haiyue Yang,Xin Wang,Jiazuo Zhou,Yuan Yu,Chengyu Wang,Yudong Li
The demand for improved indoor air quality has grown with improvements in the standards of living worldwide. While wood is widely used to construct furniture since it is a renewable resource and aesthetically pleasing, it is also flammable, which limits its applications. Although there have been extensive research efforts in reducing the flammability of wood products, current approaches often have adverse effects on the environment. In this work, a novel organo-inorganic coordination system is proposed to prepare a fire-retardant and smoke suppression wooden “air purifier” using a vacuum impregnation method. The “air purifier” is composed of tourmaline particles/KH550 (TPs/KH550) and delignified wood. The added TPs give the final composites capable to purify air (1000 psc cm −3 negative oxygen ions [NOIs]). Compared with pristine wood (PW), total heat release (THR), peak heat release rate (HRR), and smoke production rate (SPR) of the wooden “air purifier” are reduced by 47.88%, 11.73%, and 82.81%, respectively, highlighting that the composites have good fire-retardancy and smoke suppression performances. Life cycle assessment (LCA) results indicate the composites have minimal environmental impact (EI) in 15 categories. This green, eco-friendly wooden “air purifier” with fire-retardant and smoke suppression properties has a great potential application in furniture and buildings.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Li Chun-Bo,Wang Fang,Wang Yi-Yang,Guo Mei-Lin,Li Jin-Le,Deng Cong,Song Fei,Yang Wei,Wang Yu-Zhong
Superamphiphobic and flame-retardant fabrics offer effective protection for firefighters and industrial workers operating under hazardous conditions. However, limitations in deformation resistance, wear comfort, and environmental adaptability hinder their practical applications. Here, a monolithic hierarchical macro-/micro-/nanostructure is constructed to achieve durable repellency against water and oils, even under significant deformations. This coating integrates fluorinated nanoparticles, flame retardant microparticles, and a cross-linking adhesive. Hydrogen bonding and the adhesive define the coating’s morphology, robustness, and adaptability. The coated surface exhibits an ultralow water adhesion force (0.002 mN) and excellent anti-fouling performance against extreme temperatures (100 °C, −196 °C) and corrosive liquids, including aqua regia and concentrated H 2 SO 4 . Upon fire exposure, the coating enables self-extinguishing behavior on cotton fabrics. The coated fabrics also demonstrate remarkable mechanical and UV resistance while preserving wear comfort. Overall, we achieve a balance between desirable properties and wear comfort in superamphiphobic, flame-retardant fabrics, enabling protective clothing applications previously unattainable.
研究领域:
材料科学
·
表面工程
·
纺织科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junjiao Li,Chao Sui,Chenxi Zhao,Gong Cheng,Zifu Zang,Lei Wen,Yuna Sang,Yichen Zhou,Yushun Zhao,Xin Yan,Xiaodong He,Chao Wang
In recent years, there has been a growing interest in fireproof nanomaterials due to their broad applications in fire-safety and environmental preservation. In this study, one kind of lightweight fireproof hybrid aerogel with low thermal conductivity (0.039 W/m•K) was prepared through a facile ice template method, where the graphene nanosheets and hydroxyethyl cellulose (HEC) are combined with borax crosslinkers. It was found that this aerogel can be not only recyclable and repairable, but also possesses excellent compressive strength and stiffness, owing to the interfacial van der Waals adsorption, ionic crosslinking and hydrogen bonding interactions. Remarkably, it has excellent flame retardancy performance (an extremely low peak heat release rate (PHRR) was measured to be 37.44 kW/m 2 , reduced by 88.6 % comparing to that of graphene/HEC aerogel). To further explore the fire resistance mechanism of this aerogel, the molecular dynamics simulation was performed. It reveals that the borax can effectively wrap and hinder the graphene and HEC molecules from decomposition. Besides, the borax can compact graphene and HEC closer, thereby further isolating heat and oxygen, realizing the fireproof property. This study offers valuable insights for designing advanced fireproof nanomaterials and applications in shipbuilding or construction.
研究领域:
材料科学
·
纳米技术
·
火灾安全工程
✓ 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）