Fire hazard potential of non-metallic powder layers induced by deposit surfaces

Cai, Jianqi; Chang, Li; Amyotte, Paul; Yuan, Yixiao; Pang, Lei; Li, Gang; Wang, Qingsong; Yuan, Chunmiao

doi:10.1016/j.firesaf.2021.103365

Cited by 17 publications

(2 citation statements)

References 22 publications

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“…If an accident occurs during the use of fire, causing the flame to become uncontrollable, it will evolve into an accident. Fire accidents damage the achievements of human history and civilization, affect social health and stability, and hinder the rapid development of the social economy [ 1 , 2 ]. With the continuous development of society, there are more ways in which humans use fire, leading to an increasing number of fire accidents.…”

Section: Introductionmentioning

confidence: 99%

A Novel Inorganic Aluminum Phosphate-Based Flame Retardant and Thermal Insulation Coating and Performance Analysis

Cai

Guo

et al. 2023

Materials

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Currently, most thin-layer expandable coatings are polymer-based, with very few inorganic expandable coatings. Due to the high environmental friendliness of inorganic coatings, studying new types of inorganic coatings is of great significance. A novel amorphous aluminum phosphate-based flame-retardant coating was prepared by modifying it with nano-silica, hollow silica beads, hollow glass microspheres, and boron carbide. A comprehensive study was conducted on the flame retardancy and thermal insulation performance, composition and structural evolution under flame and physical and chemical properties, and the mechanisms of flame retardancy and thermal insulation were elucidated. Large-plate combustion testing, bonding strength testing, XRD, IR, TG-DSC, and SEM testing were all applied in this work. The synergistic effect of the four fillers was very obvious, and a series of AP22XY (nano-silica/silica beads/hollow glass microspheres/boron carbide = 2:2:0:4, 2:2:1:3, 2:2:2:2, 2:2:3:1, 2:2:4:0) coatings were prepared. The change in the ratio of glass microspheres to boron carbide had a significant impact on the composition and structural evolution of the coating, thus reflecting its effectiveness as a flame retardant and thermal insulation. Although decreasing the ratio would promote the formation of borosilicate glass and Al18B4O33 and improve the thermal stability of coatings, the structure inside of the coating, especially the skeleton, would be dense, which is not conducive to thermal insulation. When the ratio of glass microspheres to boron carbide is 3:1, AP2231 shows the best fire resistance. Under the combustion of butane flame at about 1200–1300 °C, the backside temperature reaches a maximum of 226 °C at 10 min, and then the temperature gradually decreases to 175 °C at 60 min. This excellent performance is mainly attributed to three aspects: (1) the foaming and expandability of coatings when exposed to fire, (2) the multiple endothermic reactions the coating undergoes, and (3) the improvement effect of boron carbide. Additionally, AP2231 shows the best bonding performance with a strength of close to 4.5 MPa after combustion, because of the appropriate content matching between borosilicate glass, Al18B4O33, and hollow glass microspheres. The coating has potential application prospects in the construction and transportation fields, such as the protection of structural steel, fire prevention in subways and tunnels, and the prevention of lithium battery fires.

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Section: Introductionmentioning

confidence: 99%

A Novel Inorganic Aluminum Phosphate-Based Flame Retardant and Thermal Insulation Coating and Performance Analysis

Cai

Guo

et al. 2023

Materials

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“…The dust formed by plant fiber particles not only affects the health of operators [4] but also increases the risk of fire and explosions [5,6]. In addition, the particles deposited in the internal gaps of the equipment may result in mechanical failures [7]. Therefore, the production of biomass energy must include a focus on the control of indoor airborne particles.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ambient Temperature and Humidity on Natural Deposition Characteristics of Airborne Biomass Particles

Yuan

Chen

et al. 2023

IJERPH

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In the production process of biomass energy with crop straw as the raw material, the indoor dust environment created by smashed plant fiber can affect the health of workers and lead to the risk of fire and explosions. The physical properties of biomass vary with the ambient air conditions, resulting in different deposition processes for airborne biomass particles. In this study, the deposition of biomass particles in different environments in an experimental chamber was examined by independently controlling the internal temperature and relative humidity. The results show that in the ambient temperature range of 20~40 °C and at a relative humidity of 25~65%, the water absorption rates of the biomass particles were 15.4~24.7%. The deposition rates of the airborne biomass particles with different sizes were 0.9~2.9 h−1, which positively correlated with the particle sizes in the same ambient conditions. The increase in ambient temperature and relative humidity promoted the deposition of biomass particles with diameters over 0.5 μm. For the particles with diameters below 0.5 μm, the deposition rates were nonlinearly related to the ambient temperature and relative humidity and were greater at lower temperatures. The significance levels of the factors influencing the particle deposition were particle size > ambient temperature > ambient relative humidity. For the biomass particles below 0.5 μm, the influence of the relative humidity on the deposition was much weaker than that of the temperature.

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Effect of voidage on the smoldering of the mixed dust layer of wood dust and shavings on a hot plate

Du,

Zhang,

Wang

et al. 2024

Advanced Powder Technology

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Fire hazard potential of non-metallic powder layers induced by deposit surfaces

Cited by 17 publications

References 22 publications

A Novel Inorganic Aluminum Phosphate-Based Flame Retardant and Thermal Insulation Coating and Performance Analysis

A Novel Inorganic Aluminum Phosphate-Based Flame Retardant and Thermal Insulation Coating and Performance Analysis

Effects of Ambient Temperature and Humidity on Natural Deposition Characteristics of Airborne Biomass Particles

Effect of voidage on the smoldering of the mixed dust layer of wood dust and shavings on a hot plate

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