Quanyi Liu

Quanyi Liu
Civil Aviation Flight University of China · College of Civil Aviation Safety Egnieering

PHD

About

72
Publications
5,545
Reads
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625
Citations
Citations since 2016
63 Research Items
594 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Introduction
Quanyi Liu currently works at the College of Civil Aviation Safety Egnieering, Civil Aviation Flight University of China. Quanyi does research in Aviation Safety Engineering and Fire Safety Engineering. The most recent publication is 'Factors affecting the burning rate of pool fire in a depressurization aircraft cargo compartment'.
Additional affiliations
July 2014 - July 2016
Tsinghua University
Position
  • PostDoc Position

Publications

Publications (72)
Article
There is a poor blocking effect of the paper diaphragm used in the transportation package of lithium-ion batteries. Hence, researches on barrier materials are necessary. In this study, the thermal runaway (TR) was triggered by a heating rod and propagated horizontally between battery packs, and the tests were conducted in a self-designed chamber to...
Article
Full-text available
Epoxy resins (EPs) have been widely used due to their great physical and chemical properties, but their poor flame retardancy limits their further application. In this work, we synthesized a flame retardant containing nitrile groups and a double bond to improve the flame retardancy of EPs. In this way, multiple cross-linking reactions can occur in...
Article
Sulfonated polyaryl ether nitrile (SPEN) is some of the most viable novel materials to replace the Nafion membrane. To resolve the issue of proton conductivity in fuel cells with poor sulfonation degree polyaryl ether nitrile cell membranes. A metal-organic structure (MOF-801) was added as a filler, and imidazole was loaded by the MOF-801 structura...
Article
Ti(OH)4/graphene was synthesized by hydrolysis of titanium tetrachloride into titanium hydroxide and precipitation on the surface of graphene nanosheets, and was incorporated into phenolic resin to prepare phenolic composites using hexamethylenetetramine as a curing agent. After that, the effects of Ti(OH)4/graphene on the thermal stability, flame...
Article
Full-text available
With the improvement of lithium-ion batteries in civil aviation transportation, the thermal safety of lithium-ion batteries can not be ignored. Especially in a battery pack, the thermal runaway of batteries can spread from cell to cell, resulting in catastrophic hazards. This work focuses on the experimental setup and analysis of the experimental p...
Article
Full-text available
To better understand the thermal runaway characteristics of lithium-ion batteries in civil aviation transportation environments, an experimental platform for the fire and explosion of lithium-ion batteries was designed and built. The 18650 NCM lithium-ion battery was selected as the test sample to study the influence of different initial pressures...
Article
The development of solid‐state batteries has become one of the most promising directions in rechargeable secondary batteries due to their considerable energy densities and favorable safety. However, solid‐state batteries with higher energy density and more durable and stable cycle life should be developed for large‐scale energy storage and adaption...
Article
Epoxy resins are widely used in many fields because of their excellent physical and chemical properties. Unfortunately, epoxy resins are inherently combustible materials and have great fire hazard. Three methods are employed to endow epoxy resins with good flame-retardant properties, and they are intrinsic flame-retardant, additive flame-retardant...
Article
Epoxy resin (EPs) has been widely used in many fields in recent years, such as electronics, adhesives, coatings, and so on, which mainly benefiting from its excellent mechanical and chemical properties, low price and easy preparation. However, conventional EPs tend to be flammable, which significantly prevents their applications especially in high...
Article
The effect of microalloyed Ca on the microstructure, mechanical properties and aging precipitation of Mg-6Zn-1Mn-4Sn (wt.%, ZMT614) alloy were investigated. The as-cast ZMT614 alloy was mainly composed of α-Mg, Mg-Zn and Mg2Sn phase, and a new CaMgSn phase with high melting point was formed with Ca addition. The CaMgSn phase was easier to form than...
Article
With the rapid consumption of traditional fossil energy and the aggravation of environmental pollution, it has become a trend for new energy to replace fossil energy as the main power source. Under this trend, lithium-ion batteries have attracted more and more attention as a new energy storage device, and it has been widely used because of its many...
Article
The lithium-ion battery has the advantages of high energy density, long cycle life, small occupied volume, and high discharge voltage, which significantly promotes the development of portable electronic devices and electric vehicles. However, the accompanying safety issues have also aroused great concern. Solid-state lithium-ion batteries using sol...
Article
Epoxy resins (EPs) are a kind of widely used engineering materials, because of their excellent mechanical, chemical and physical properties, but a severe problem they faced is their poor flame retardancy. Single molecule flame retardants have met the bottleneck after the massive researches of the past decade, so, with the development of the polymer...
Article
Full-text available
A hyperbranched phosphorus-containing copper phthalocyanine compound (DOPO-CuPc) was successfully synthesized and used as the flame-retardant additive to prepare flame-retarded epoxy thermosets. The addition of DOPO-CuPc led to a significant enhancement of the flame retardant properties of the epoxy resin. The 15DOPO-CuPc/EP composite obtained a LO...
Article
The nanoscale crack propagation behavior in the presence of nonlinear disturbance strains is studied by using the phase‐field‐crystal method. The influences of amplitude A and frequency ω on fracture mode and crack growth are discussed. The simulation results suggest that the disturbance strains can make fracture mode change between brittle fractur...
Article
Full-text available
Flexible polyurethane foam (FPUF) has many advantages such as lightweight, low density and high specific strength and is widely used in furniture, automobile industry, construction and transportation. However, FPUF is extremely flammable in the air, and a large amount of toxic gas will be generated when it is burned. The fire protection technology...
Article
Present polymer inhibitors depend on a major inhibitory group to restrain bentonite hydration, and monomer design is concerned to improve the inhibition and stability through complex copolymerization. Conveniently, a homopolymer (PIL‐NH2) that contained primary amine and cationic imidazolium as bi‐functional groups was proposed, aiming to provide t...
Article
Epoxy resin has been widely used in aerospace, automotive construction and other fields due to its excellent mechanical performance, dielectric and corrosion resistance properties. However, epoxy resin can burn easily in the air and create the massive hazardous smoke and toxic gases during combustion, which may bring casualties and property losses,...
Article
Metal-organic frameworks (MOFs) have been widely investigated for their porosity and functional diversity. Inspired by the flexible designability of MOFs, UiO-66-NH 2 /CNT with moniliform nanostructure was designed and synthesized successfully. SPEN@UiO-66-NH 2 /CNT composite proton exchange membranes were prepared by loaded UiO-66-NH 2 /CNT into s...
Article
With great chemical and physical properties, epoxy resins (EPs) are used almost everywhere in life and engineering, but poor flame-retardant performance hinders them for a wider use. Traditional flame retardants (the most commonly used and researched) usually have dispersion and migration problems (additive ones) or are difficult to synthesize (rea...
Article
A phosphorus/nitrogen-containing compound (named DOPO-BAPh) was synthesized via the graft reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and bisphenol A bis(phthalonitrile) containing benzoxazine. The flame retardancy of DOPO-BAPh was investigated on epoxy resin (EP). The results showed that DOPO-BAPh catalyzed the curin...
Article
Full-text available
A new method for studying the two-dimensional spreading properties and sealing characteristics of surfactant solution on oil surface was provided. The actual spreading situation of the C4-Br/oil systems in axisymmetric geometry was observed directly using HD camera for the first time and the results showed that the aqueous film expanded outwards in...
Article
The objective of this work is to study the fire behavior characteristics under low pressures. Cardboard box fire experiments of two kinds of fire load, 1‐box and 2‐box fires, were conducted separately at 101 kPa, 75 kPa, 64 kPa, and 59.5 kPa in an altitude chamber. The heat release rate, mass burning rate, residual ash mass and radiative heat flux...
Article
Shear-induced coupled evolution behavior of intragranular crack and grain boundary (GB) in nanoscale bicrystal system is studied by using phase-field-crystal method. Evolution process of system with different crack sizes and grain boundary misorientations (GBMs) is analyzed. Instead of normally extending under applied strain, intragranular crack ca...
Article
Recently, metal phosphides have been extensively investigated as promising anode materials for rechargeable batteries ascribing to their good electrical conductivities and favorable electrochemical performances. These materials usually exhibit conversion-type (and alloying-type) lithium, sodium, or potassium storage mechanisms, thus delivering larg...
Article
It is important for regenerative fuel cells, rechargeable metal–air batteries and water splitting to find reasonable designed nonprecious metal catalysts, which have efficient and durable electrocatalytic activities for oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, through a si...
Article
Full-text available
Proton exchange membrane fuel cells (PEMFCs) have received considerable interest due to their low operating temperature and high energy conversion rate. However, their practical implement suffers from significant performance challenge. In particular, proton exchange membrane (PEM) as the core component of PEMFCs, have shown a strong correlation bet...
Article
Full-text available
With the increasing emphasis on environmental protection, the development of flame retardants for epoxy resin (EP) has tended to be non-toxic, efficient, multifunctional and systematic. Currently reported flame retardants have been capable of providing flame retardancy, heat resistance and thermal stability to EP. However, many aspects still need t...
Article
In order to investigate the thermal runaway mechanism of 18650 lithium ion batteries and the related hazards, an experimental platform for lithium ion battery fire and explosion is designed and built. The effects of different arrangements, including vertical 2 × 2 and vertical 4 × 1, and initial pressure (96 kPa and 61 kPa) on lithium ion battery t...
Article
Full-text available
Metal-organic frameworks (MOFs), as newly emerging filler materials for polyelectrolytes, show many compelling intrinsic features, such as variable structural designability and modifiability of proton conductivity. In this manuscript, UiO-66-NH2, a stable MOF with -NH2 functional groups in its ligands, was selected to achieve a high-performance sul...
Article
Full-text available
A novel MoS2–DOPO hybrid has been successfully synthesized through the grafting of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on the surface of MoS2 nanosheets using allyl mercaptan as an intermediate. MoS2–DOPO was used as a flame retardant additive to prepare flame-retardant flexible polyurethane foam (FPUF). The influence of MoS2–...
Article
Aqueous film-forming foam (AFFF) is a very important extinguishing agent for hydrocarbon fuel fires. The spreading performance of AFFF is one of the key factors to decide its extinguishing efficiency. There are many parameters that affect the spreading performance of AFFF, but few studies have been done on its spreading mechanism. A method for stud...
Article
Full-text available
The existing equipment of civil aircraft cargo fire detection mainly uses photoelectric smoke detectors, which has a high false alarm rate. According to Federal Aviation Agency’s (FAA) statistics, the false alarm rate is as high as 99%.¹ In the cargo of civil aircraft, the traditional photoelectric detection technology cannot effectively distinguis...
Article
Full-text available
The slope of ground has a significant impact on the spread and burning process for spill fires on land. In this paper, a series of continuous spill fire experiments were conducted on a fireproof glass sheet with different slope angles (0.5°, 1°, 3°) to study the effects of slope on fuel spread and burning behaviors. The results show that the spread...
Article
Ethanol-Gasoline has been used as vehicles fuel in areas widely in world, especially in China with areas from plain to high altitude. The addition of ethanol in gasoline will change the physicochemical properties of pure fuels, and then affect the burning behaviors. In this study, the burning rates of blending fuels were mainly investigated in a fu...
Article
A series of pool fires were carried out in an airplane cargo compartment to investigate the effect of the pressure on the heat radiation flux (HRF) of the inclined ceiling jet fire. During the tests, different static chamber pressures ranging from 50 to 101 kPa were controlled by the air flow in and out; both free fire and inclined ceiling jet fire...
Article
Full-text available
Phosphorus- and silicon-modified graphene oxide was prepared to improve the thermal stability and flame retardancy properties of epoxy resin. 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and vinyltriethoxysilane (VTES) were successfully grafted onto the surface of graphene oxide (GO) through solvothermal synthesis and hydrolysis–conden...
Article
Full-text available
In order to investigate the effect of crosslinking degree on the water uptake, swelling ratio, and methanol permeability of sulfonated poly(aryl ether nitrile)s (SPENs), the molar content of sulfonated group in bisphenol monomer is fixed at 60% in this work. The properties of sulfonated poly (aryl ether nitrile) with different crosslinking degrees...
Article
Full-text available
This work reports an efficient and green reduction method of graphene oxide (GO) by a one-step hydrothermal process. GO was prepared by the oxidation of graphite using a modified Hummers method. The reduced graphene oxide (rGO) were characterised and studied by means of UV-vis absorption spectra, Raman spectroscopy and transmission electron microsc...
Article
The phase-field-crystal method is implemented to study shear-induced nanograin deformation process. The influence of temperature and grain boundary misorientation (GBM) on the evolutionary behavior is analyzed. Temperature has a marked impact on dislocation migration and emission. Dislocation migration in all systems and dislocation emission in lar...
Article
Poly(vinyl alcohol) grafted reduced graphene oxide (PVA-rGO) nanohybrid has been synthesized by a facile hydrothermal method. Transmission electron microscopy, ultraviolet-visible spectroscopy, fourier transform infrared spectroscopy and ¹H NMR spectroscopy confirmed that the PVA chains were successfully grafted onto the surface of graphene oxide s...
Article
A full-scale below-floor cargo compartment with the size of 8.11 m × 4.16 m × 1.67 m was used to simulate a depressurized environment for an aircraft fire during flight. Pool fire experiments with 20 cm n-heptane at four depressurization rates of 6 kPa/min, 12 kPa/min, 17 kPa/min, and 20 kPa/min were carried out. The fuel mass, compartment pressure...
Conference Paper
During the storage and transportation of aviation kerosene, spill fire and explosion caused by the corrosion of pipeline or faulty operation when released and ignited, will pose a huge threat to tanks or facilities nearby. It is critical to investigate the interaction mechanism between spreading and burning of aviation kerosene spill fires to effec...
Conference Paper
Tests are conducted in a low-pressure combustion chamber of 3 × 2 × 4.65m3 in volume to investigate the effect of low pressure on the drainage and expansion characteristics of AFFF (Aqueous Film-Forming Foam). A manipulator equipment with the frequency of 4 Hz and the amplitude of 32cm is designed for the foaming of AFFF in the chamber. The paramet...
Article
The thin-layer burning platform was constructed to study the thin-layer burning behaviors. The thermal radiative penetration and the temperature distribution of heptane for different layer depths were tested. Pool size and initial fuel thickness were changed in the experiment. The experimental results indicate that the thickness of the isothermal l...
Article
The spread of burning fuel spilled from tanks or pipes during oil storage and transportation industries may threat other facilities nearby and trigger further accidents. In this paper, the effect of substrate slope on the continuously released liquid fuel spill fire was experimentally investigated, in a one-dimensional channel with different discha...
Article
Full-text available
A series of large-scale spill fire experiments with continuous discharge on a rectangular fireproof glass sheet were conducted, to better understand spill fire spread behaviors on land. JP-5 and heptane were selected as the fuels, with discharge rates varying from 0.93 to 6.82 L/min. Results show that the spread process can be divided into five pha...
Article
The objective of this work is to examine the effect of dynamic pressure on the behavior of a horizontally burning flame based on experimental approach. The experiments were conducted in a large-scale altitude chamber of size 2 m × 3 m × 4.65 m under three different dynamic pressures with various depressurization rates. Two round steel fuel pans of...
Conference Paper
This research aims to investigate the effect of ambient pressure on the burning rate and heat release rate (HRR) of n-heptane pool fire. The experiments were performed in a large-scale altitude chamber of size 2 m×3 m×4.65 m under series of pressure, 24kpa, 38 kPa, 64 kPa and 75 kPa to 90 kPa. A round steel fuel pans of 34 cm in diameter and 15 cm...
Article
Fire safety is critical for safety of airplane operation. During an emergency landing, airplane goes through dramatic external pressure change from cruise altitude to sea level. The objective of this work is to examine the effect of dynamic pressure on the behavior of a horizontally burning flame over a pool fuel surface based on experimental appro...
Conference Paper
Fire safety is critical for safety of airplane operation. During an emergency landing, airplane goes through dramatic external pressure change from cruise altitude to sea level, considering the impact caused by low pressure atmosphere. The objective of this work is to examine the effect of dynamic pressure on the behavior of a horizontally burning...
Conference Paper
Fires recently at low ambient pressure such as cruising airplane and high altitude airport have attracted great attention. Understanding fire behavior under low pressure is one of important fundamental problems for fire safety engineering design in forementioned environment. Observation of cardboard fires under dynamic pressure is of significant me...
Conference Paper
To comprehensively reveal the difference of solid fuel fire characteristics at different altitudes, fire experiments of cardboard boxes at multiple static pressures with two configurations filled with shredded office paper were conducted in a low-pressure chamber. The measured parameters are mass burning rate, radiative heat flux, oxygen concentrat...
Conference Paper
Full-text available
Fires at high altitude airports have attracted a lot of attention. Such fires show some special characteristics because of the coupling impact of low pressure and low oxygen levels. Some experiments, which were conducted recently at high altitude locations, such as Lhasa and in some low pressure chambers, were usually extinguished due to the limite...