COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Puyou Jia,Yuxuan Shi,Fei Song,Yu Bei,Caoxing Huang,Meng Zhang,Lihong Hu,Yonghong Zhou
Bio-based polymer materials with multichannel self-healing ability as intelligent sensor have received significant attention. However, to date, study on bio-based vitrimer composites with multichannel self-healing ability as early temperature and fire warning sensors has never been reported. In this study, We prepared bio-based polyschiff vitrimers using vanillin and tung oil as raw materials, which possessed excellent self-healing and reprocessability. The electricity, heat and electromagnetic wave triggered self-healing of bio-based polyschiff vitrimers with graphene were achieved. A practicable strategy for fabricating bio-based via composite graphene oxide were developed as an efficient temperature warning sensor and fire warning sensor. These multifunctional bio-based polyschiff vitrimer composites developed could greatly promote its practical application in fire/high temperature prevention and protection applications in various critical fire risk and related perilous circumstances.
研究领域:
材料科学
·
智能传感技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Wanqin Gong,Jun Cheng,Wu Yan,Hantao Zou,Chao Gao,Xueting Liu,Lin Wang
Microcracks on the surface and inside inevitably occur during processing and use. The use of photo-initiated, self-healing, self-warning microcapsules to repair and monitor these microcracks is of practical importance to prolong the life of coated fabrics. In this work, the microcapsules (EP/FA/SiO 2 ) with SiO 2 as wall material, epoxy resin , fluorescent agent and cationic photoinitiator as core material were prepared using the interfacial in situ polymerization method . The self-healing self-warning PVC coated fabric was obtained by scraper coating method. The self-healing, self-warning and mechanical properties of the coated fabric were characterized. The results show that the microcapsules have an encapsulation efficiency of 79 % and a core-wall structure. The wall thickness is about 200 nm and the particle size is 1.7 μm. The microcapsules have excellent thermal stability below 320 °C. The microcapsules have good dispersion in the PVC coating surface and the repair agent has good wettability in the PVC coating surface . When the cuts expand, the previously embedded microcapsules break open and release the fluorescent active ingredient and the repair agent of the capsule core. Under UV light irradiation, the scratches may show a yellow fluorescence to indicate the location of the damage to the coating. The repair agent (epoxy resin) fills the cuts and then polymerizes with the cationic photoinitiator under UV light. As the exposure time increases, the cut gradually narrows and the strength of the coated fabric increases. After 36 h of UV exposure, the cut disappears and the strength of the coated fabric is 742 N, reaching the strength (768 N) of the fabric before scratching. This indicates that the coated fabric has a good photo-initiated self-healing effect.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yihang Zhang,Jing Guo,Hongye Wang,Fangxin Zou,Xuecui Song,Fucheng Guan,Minghan Li,Jianbin Sun,Zheng Li,Qiang Yao
Fresh trays could not provide efficient protection and detection to the fresh foods during the transportation and sale processes due to its less functions. To address these challenges, one type of multifunctional fresh tray with antibacterial and detection properties was fabricated by the combining of two types of functionalized polylactic acid (PLA) aerogels, PLA/carvacrol (PLA/CA) aerogel and PLA-red cabbage anthocyanin (PLA-RCA) aerogel. The PLA/CA aerogel prepared by in situ encapsulation strategy exhibits a strong antioxidant effect with the free radical clearance rate of 69.57 % at 12 h, and a significant inhibitory effect on Staphylococcus aureus and Escherichia coli due to the existence of CA. The PLA- RCA aerogel prepared via the solute self-assembly strategy demonstrates a detection property due to the existence of RCA. Meanwhile, the microfiber structure of PLA aerogel provided more reaction sites for RCA which results in a fast response to ammonia in 5 s. Therefore, the novel fresh tray could not only extend the shelf life of food but also monitor the status of food in real time. Overall, the preparation of the novel fresh tray by the functionalization of PLA aerogel can provide a feasible solution for the storage and detection of fresh food.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xiao Wang,Ya Zhao,Xin Qi,Tiantian Zhao,Xiupin Wang,Fei Ma,Liangxiao Zhang,Qi Zhang,Peiwu Li
Aflatoxins seriously threaten human health and food safety, and early warning benefits the reasonable use of control measures to reduce aflatoxin contamination. In this study, a novel method for quantifying aflatoxins and their precursors in the aflatoxin biosynthesis pathway was developed by combining ultra-high performance liquid chromatography high-resolution mass spectrometry (UHPLC-HRMS) with quantitative analysis of multi-components by a single marker (QAMS). The stability of the relative correction factor (RCF) of QAMS was then systematically evaluated. The validation results showed that the relative deviation (RD) between QAMS and the external standard method (ESM) was less than 11.7%, indicating that the established QAMS method could replace ESM without the use of reference standards. This method was successfully employed to compare the time-course changes of metabolites in the aflatoxin biosynthesis pathway of Aspergillus flavus and Aspergillus parasitica. As a result, the precursors of (1'S,5′R)−5′-Hydroxyaverantin (HAVN) and Versicolorin B (VerB) could be used as potential markers for the early warning of aflatoxin contamination. This study provided a quantitative method of aflatoxins and their precursors in the biosynthesis pathway, and may serve as a reference for the extension of quantitative studies on other metabolic pathways.
研究领域:
食品安全
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Yunyirui Liu,Changhua Li,Rongkai Wu,Jixin Gong,Bihe Yuan
Enhancing flame retardancy and fire-warning capabilities of thermal insulation materials used in building external walls is crucial for ensuring fire safety as well as guarding people's lives and assets. Herein, we have developed an environmentally friendly nano-coating that possesses flame-retardant and early-warning properties by integrating graphene oxide (GO) and attapulgite (ATP) onto melamine foam (MF) through a layer-by-layer self-assembly method (LBL). The GO-ATP-MF composite demonstrates a rapid response to flame (<1 s) due to GO's thermally induced reduction. Additionally, ATP's synergistic flame-retardant effects on both gas and condensed phases contribute to outstanding flame retardancy, enabling an enduring fire alarm duration (>1330 s). The warning duration time of this composite surpasses the majority of GO-based fire-warning nano-coatings reported to date. Moreover, incorporating a Bluetooth wireless transmission system facilitates real-time fire information sharing among smart devices, thereby optimizing fire signal transmission efficiency. Thus, this study advances GO-based flame-retardant nano-coatings and devices with high sensitivity and prolonged fire-warning capabilities, providing an innovative idea to enhance the fire safety of MF as a thermal insulation material.
研究领域:
材料科学
·
消防安全
·
纳米技术
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Qingtao Zeng,Binglin Wang,Xuejun Lai,Hongqiang Li,Zhonghua Chen,Huali Xie,Xingrong Zeng
Titanium carbide (MXene) nanosheet is one of the most promising early fire-warning materials but limited by its relatively low thermopower. Doping modification is an effective method to improve its thermoelectric efficiency. Herein, a novel enhanced thermopower flame-retardant cotton fabric (HTE@CF) was fabricated by dip-coating of MXene, tannic acid (TA), and calcium chloride (CaCl 2 ) via layer-by-layer assembly. It was found that HTE@CF exhibited high thermopower. When the temperature difference was 120 °C, its maximum thermoelectric voltage was as high as 3.72 mV, and the Seebeck coefficient was more than 39.4 μV/K, which was about 900% higher than those of MXene/TA@CF. HTE@CF displayed accurate temperature response and sensitive fire-warning performance. When being burned, it quickly triggered the fire-warning system within 3 s. More importantly, HTE@CF exhibited outstanding flame retardancy. Its limiting oxygen index (LOI) was as high as 35.3%, and its structure remained stable when exposed to the flame for 60 s. Furthermore, due to the high conductivity of MXene and CaCl 2 , HTE@CF showed good piezoresistive sensing capability. Our work provides new insights for the preparation of multifunctional and smart fire protection cotton fabrics.
研究领域:
材料科学
·
智能纺织品
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 18
·3666
·
IF 5
Tongtong Ma,Qianqian Zhou,Chaozheng Liu,Liping Li,Chuigen Guo,Changtong Mei
Multifunctional biofilms with early fire-warning capabilities are highly necessary for various indoor and outdoor applications, but a rational design of intelligent fire alarm films with strong weather resistance remains a major challenge. Herein, a multiscale hierarchical biofilm based on lignocellulose nanofibrils (LCNFs), carbon nanotubes (CNTs) and TiO2was developed through a vacuum-assisted alternate self-assembly and dipping method. Then, an early fire-warning system that changes from an insulating state to a conductive one was designed, relying on the rapid carbonization of LCNFs together with the unique electronic excitation characteristics of TiO2. Typically, the L-CNT-TiO2film exhibited an ultrasensitive fire-response signal of ~0.30 s and a long-term warning time of ~1238 s when a fire disaster was about to occur, demonstrating a reliable fire-alarm performance and promising flame-resistance ability. More importantly, the L-CNT-TiO2biofilm also possessed a water contact angle (WCA) of 166 ± 1° and an ultraviolet protection factor (UPF) as high as 2000, resulting in excellent superhydrophobicity, antifouling, self-cleaning as well as incredible anti-ultraviolet (UV) capabilities. This work offers an innovative strategy for developing advanced intelligent films for fire safety and prevention applications, which holds great promise for the field of building materials.Keywords:fire-warning;biofilms;fire resistance;superhydrophobicity;anti-ultraviolet
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Guomin Ye,Qiang Wu,Yi Chen,Xueke Wang,Yubo Wang,Yongqiang Tu,Yanfen Wan,Peng Yang
An Electrostatic Induction Pendulum (EIP) has been designed and developed for the first time in the innovative construction and maintenance of earthquake prewarning systems to address the existed issues of massive funding required, incomplete distribution even as well as the lack of coverage in remote or sparsely populated areas. This innovative EIP includes a pendulum and a static-electricity induced sensor which could detect subtle variations in electrical potential during motion. The sensor offers crucial insights into the vibration, damping, and resonance traits of the EIP, with the minimum detectable vibration intensity of 0.17 m/s 2 . Simultaneously, by introducing external vibrations varied with frequencies, the inherent frequency of the EIP can correspondingly be modified subtly leading energy distribution to be weakened, which lay a groundwork for earthquake monitoring and early warning. Furthermore, an earthquake monitoring and early warning system aided by EIP, data acquisition module, and machine learning is engineered for real-time analysis and decision-making. Once an earthquake occurs, the system automatically sends alerts to relevant departments or individuals to take protective measures in advance. This cost-effective, easily portable, and widely distributed earthquake monitoring solution complements existing systems and can be easily deployed even in remote areas.
研究领域:
地震学
·
传感器技术
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Fei Yang,Ying Ran,Qichao Bao,Pengxu Tao,Jianliang Ding,Shengnan Zhang,Jiawei Zhu,Chungui Du
Bamboo and other biomass materials have become essential constituents in architecture and interior decoration owing to their outstanding environmental attributes. Nevertheless, their extensive utilization has given rise to substantial fire safety hazards, with toxic smoke frequently posing a greater lethality than heat. In this research, a fire warning coating with a mud brick structure was fabricated on the bamboo surface (AM@Bamboo) by combining positively charged flame retardant ammonium polyphosphate with the negatively charged groups on the MXene surface through a simple water evaporation-induced self-assembly method. The coating's abundant graded pores effectively suppressed the volatilization of smoke at high temperatures. Specifically, the concentrations of toxic NO 2 , NO, CO, and CO 2 gases released during the combustion of AM@Bamboo decreased notably. Among them, the decreases in peak value of CO and CO 2 were 21.2% and 61.1%, respectively. The limiting oxygen index value of AM@Bamboo rose to 36.06%, and the heat release rate was 166.51 kW/m 2 , which is 45.5% lower than that of bamboo. Simultaneously, MXene generated rutile type TiO 2 with semiconductor properties at high temperatures, endowing bamboo with stable cycling warning capabilities. It can trigger an alarm within 5 s in case of a fire and is capable of cycling warnings for 10 cycles. Consequently, AM@Bamboo can be reused multiple times after a fire, greatly reducing its carbon footprint. This achievement provides novel concepts and methods for enhancing the fire safety of bamboo products, and its potential applications can be extended to emerging fields such as intelligent sensing and monitoring.
研究领域:
材料科学
·
环境科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 18
·3541-3549
·
IF 7.571
Xin Zhang,Cheng Wang,Jiangjie Wu,Ben Zheng,Si Chen,Meng Ma,Yanqin Shi,Huiwen He,Xu Wang
Although more than 2.2 million cranial repair surgical operations are performed every year, orthopedic doctors still dream of excellent artificial repair materials with suitable strength, on-site and on-demand fast-shaping properties, and bone induction properties. However, fast-shaping and high-strength properties seem to contradict each other, and even mineralized hydrogels, which already have excellent strength and bone induction properties, are not ideal candidates, since they lack the plasticity needed for complex craniofacial surface use during the essential mechanism of the process of the cleavage of inorganic ions, nucleation, and growth. Here, we report a novel mineralized hydrogel based on dispersing mineral ions prior to use and then inducing inorganic formation by decreasing the temperature, which endows the hydrogels with the characteristics of precise customization at an appropriate degree of mineralization and simultaneously achieves suitable mechanical properties and sufficient calcium supply for bone regeneration. Additionally, the calcium ion content in the water of the matrix will change with the temperature, and, thus, the conductivity of the mineralized hydrogels will change accordingly. This implements the ability to warn of inflammation in a timely fashion in the form of a temperature sensor. Therefore, this temperature-responsive hydrogel effectively achieves the aim of versatile material design.
研究领域:
生物医学工程
·
材料科学
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zongfu Cai,Bo Wu,Xinxing Zhou,Kerui Li,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
The demand for highly sensitive temperature-response materials is critical for the advancement of intelligent temperature sensing and fire warning systems. Despite notable progress in thermoelectrical (TE) materials and devices, designing TE materials suitable for wide-range temperature monitoring across diverse scenarios remains a challenge. In this study, we introduce a TE temperature sensor for fire warnings and hot object recognition, utilizing an all-inorganic TE film composite of reduced graphene oxide (rGO)/Te nanowires (Te NWs). The resulting all-inorganic TE film, annealed at a high temperature, exhibits distinct response ratios to varying temperature changes, enabling consistently sensitive thermosensation. The robust linear relationship between open circuit voltage and temperature difference establishes it as an effective thermoreceptor for enhanced temperature alerts. Furthermore, we demonstrate that the assembled TE sensor provides rapid high-temperature warnings with adjustable threshold voltages (1–7 mV), achieving an ultrafast response time of approximately 4.8 s at 1 mV threshold voltage. Additionally, this TE sensor can be integrated with the gloves to monitor high-temperature objects in various scenarios, such as the brewed milk in daily life and heating reactors in industrial applications. These results offer perspectives for future innovations in intelligent temperature monitoring.
研究领域:
材料科学
·
智能传感技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhicai Yu,Lele Huang,Mi Zhou,Jie Xu,Jianchao Ma,Yuhang Wan,Qing Jiang,Xueru Qu,Hualing He
Early fire warning represents an effective mean in the face of fire that can remind people in timely manner to adopt effective countermeasures before the occurrence of fire. Despite the encouraging progress of current early fire-warning sensors, a more sensitive monitoring of early fires in multiple aspects remains challenge. Herein, a dual-mode core-sheath structured SnO 2 /MoS 2 @MXene@ANFs (SMA) early fire warning sensor fiber was prepared by coaxial wet spinning technology. The core-layer of SMA fiber comprised the thermoelectric material Ti 3 C 2 T X MXene, whereas the shell-layer comprised the gas-sensitive SnO 2 /MoS 2 and silver nanowires (Ag NWs) along with aramid nanofibers (ANFs). The robust and flame-retardant ANFs served as protective shell, safeguarding the stability and flexibility of the temperature and gas sensing functions within the fiber. Based on the thermoelectric performance of MXene, there is a linear relationship between the output voltage and temperature difference of SMA fiber, which can achieve wide range of temperature sensing from 50 to 300 ℃ and accurately identify abnormal temperature increases in the environment. Simultaneously, The bridging effect between one-dimensional Ag NWs and SnO 2 /MoS 2 enhances the sensing capability of fiber for CO (R 0 /R = 1.43@100 ppm). In addition, an early fire warning system based on SMA fiber has been established, which can sensitively detect the flames (≤4 s). This system can also be used for monitoring CO gas in fire environments, guiding firefighters’ rescue actions, expanding the application scope of early fire warning sensors in the past, and opening up new directions for the development of intelligent early fire sensors in the future.
研究领域:
材料科学
·
传感器技术
✓ 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）