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
·
2022
·
IF 16.744
Changcheng Jiang,Jiayun Chen,Xuejun Lai,Hongqiang Li,Xingrong Zeng,Yinan Zhao,Qingtao Zeng,Jiefeng Gao,Zhengzhong Wu,Yunkun Qiu
Multifunctional smart fire-protection aerogels are urgently needed to meet the requirement of the Internet of Everything era. Herein, we fabricated a mechanically robust and high fire-safe polyimide/MXene composite aerogel (denoted as PI@MXene) with sensitive temperature-sensing and fire-warning capability. Thanks to the unique thermoelectric effect and high electrical conductivity of the 2D transition metal carbide (MXene) nanosheet, PI@MXene exhibited a linear relationship between the thermoelectric voltage and the temperature difference, showing sensitive temperature-sensing capability. When being burned, it could repeatedly trigger the fire-warning system in less than 5 s. More importantly, owing to the lamellar barrier and skeleton supporting effect of the MXene nanosheets, PI@MXene exhibited excellent flame retardancy, which self-extinguished within 1 s after exposing to a flame for 60 s and whose peak heat release rate was significantly decreased by 78% compared with PI aerogel. Besides, PI@MXene showed impressive thermal insulation, outstanding thermostability and durable piezoresistive sensing. This work provides a novel strategy to fabricate next-generation multifunctional fireproof aerogel, showing promising applications in intelligent robots, aerospace, and railway transportation.
研究领域:
材料科学
·
智能材料
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tongtong Ma,Qianqian Zhou,Liping Li,Mingzhu Pan,Chuigen Guo,Changtong Mei
MXene has proved a bright prospect for developing intelligent fire-warning sensors, which is an emerging field but suffers from poor thermal oxidation stability and low flame retardant efficiency. Herein, a nacre-inspired bridging network constructed by MXene and chitin nanocrystals (ChNCs) with early fire-warning and high fire prevention was fabricated through low-temperature evaporation assembly approach. When encountering a fire source, such insulated network can independently construct a conductive path and then trigger the fire-warning signal owing to the char-forming and bridging effect of ChNCs. Typically, the ChMXene network incorporated with 30 wt% of adenosine triphosphate (ATP) (ChMXene-30) exhibits an ultrafast fire alarm signal of only 0.78 s and an ideal response time of 290 s. The thermal oxidation resistance, insulation performance and fire protecting properties of the network were drastically enhanced by the synergistic intumescent flame retardant effect of ChNCs and ATP. The corresponding enhancement mechanism was ascribed to the quenching effect of phosphorus-based radicals and diluting effect of non-combustible gases in the gas phase, the barrier effect of intumescent char layers as well as the effect of blowing-out fire in the condensed phase. This work offers a novel strategy to achieving sensitive fire-warning and reliable thermal oxidation resistance of MXene network for protection applications in disparate major fire potential and related hazardous environments.
研究领域:
材料科学
·
消防安全
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Long Xia,Yunzhi Lin,Mingjin Xue,Rentong Qin,Wenbo Du,Yiting Xu,Conghui Yuan,Birong Zeng,Lizong Dai
Cotton fabrics with intelligent fire warning and protection have promising applications in smart wearables and smart home decoration. In this study, multifunctional nanoparticles (M@A) with heterogeneous structures are constructed through the electrostatic self-assembly of core-shell structured silver nanowires (AgNW@BP) and MXene nanosheets . Subsequently, M@A is blended with bio-based sodium alginate (SA) to prepare multifunctional cotton fabrics that exhibit fire warning, thermal conductivity , high strength , and flame retardancy. For instance, the tensile strength of the multifunctional fabric is 58.5 MPa, surpassing that of some MXene paper/films used for fire warning (~10 MPa). Furthermore, the catalytic charring effect of AgNW@BP and the labyrinth effect of MXene synergistically enhances the flame retardancy of the multifunctional cotton fabric (total heat release rate, total smoke production and peak heat release rate of the multifunctional cotton fabric are 5.7 MJ/m, 0.09 m 2 , and 126.8 kW/m 2 , respectively). Significantly, the multifunctional cotton fabric also demonstrates a fast response time (2 s) and repeatable alarm capability when exposed to flames attack.. Hence, this work provides inspiration for the design and fabrication of multifunctional cotton fabrics with intelligent fire warning and protection.
研究领域:
材料科学
·
纺织工程
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Yushu Wang,Jinru Liu,Yuhang Zhao,Yi Qin,Zhenyu Zhu,Zhicai Yu,Hualing He
The design and exploitation of highly fire-safe aerogel with ultrasensitive fire-warning response and highly efficient thermal management capabilities are urgently needed to protect firefighters from burn injuries during fire operations and rescue. Herein, an ultralight temperature-triggered fire-warning aerogel composited of polyethylene glycol (PEG)@modified wood powder (MW)/amino-functionalized carbon nanotube (A-CNT)/calcium alginate (CA) (abbreviated as P@MW-A-CA) was fabricated. Benefiting the rapid decrease in electrical resistance of A-CNT at high temperatures, P@MW-A-CA achieved an ultrafast fire warning response time of ∼2.03 s when exposed to fire. Meanwhile, PEG was encapsulated into MW and acted as microtubule phase-change material (P@MW) in aerogel to effectively delay the heat penetration into P@MW-A-CA. The stiff MW served as the backbone endowed the fire-warning aerogel a “stiff-soft” structure that increased the mechanical resilience. P@MW-A-CA achieve flyweight density (0.038 g/cm 3 ), low thermal conductivity (0.06233 ± 0.0012 W/m⋅K), and outstanding self-extinguishment (<1.02 s). This work provides an environmental friendliness approach to design an ultralight early fire-warning aerogel in firefighting clothing for enhancing the fire safety of firefighters.
研究领域:
材料科学
·
消防安全
·
纺织工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Zhihao Du,Xiaoqiu Zhong,Jianhui Qiu,Longxiang Zhu
With the rapid development of new electronic technologies, flexible electronic devices based on conductive gels have emerged and are widely used in wearable electronic devices, electronic skins, electronic fabrics and other fields. However, traditional deep eutectic solvent polymer (PDES) gels face many problems in terms of mechanical strength and conductive properties. In this study, hemicellulose-lignin complex (HLC) extracted from straw was used as a physical cross-linker (additive) to prepare polymethacryloxyethyltrimethyl ammonium chloride-Glycerol (PDMC-Gly) gel. With the addition of 2 wt% HLC, the tensile strength and elastic modulus of HLC/PDMC-Gly gel were 846.2 kPa and 290.0 kPa respectively, both of which were significantly higher than pure PDMC-Gly gel. The introduced HLC with lignin benzene ring structure units gave the gel excellent light transmittance and ultraviolet blocking properties. In addition, the incorporation of HLC reconstructed the hydrogen bonding network within the gel, resulting in the release of free Cl − ions. Consequently, the ionic conductivity of gels was significantly enhanced, reaching of 1.61 × 10 3 mS/cm. This gel has excellent sensing sensitivity, humidity responsiveness and thermal stability, and has potential application prospects in the fields of real-time human body detection, environmental detection and fire early warning.
研究领域:
材料科学
·
生物医学工程
·
柔性电子器件
✓ 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）