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	1. Pyrolysis of Medium Density Fibreboard: Optimized Search for Kinetics Scheme and Parameters via Genetic Algorithm Driven by Kissinger's Method
	Li K,Huang X,Fleischmann C M,Rein G,Ji J
	Security Science and Technology 29 July 2014
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	Abstract:The pyrolysis kinetics of charring materials plays an important role in understanding material combustions especially for constructions materials with complex degradation chemistry. Thermogravimetric analysis (TGA) is frequently used to study the heterogeneous kinetics of solid fuels, however, there is no agreed method to determine the pyrolysis scheme and kinetic parameters for charring polymers with multiple components and competing reaction pathways. This study develops a new technique to estimate the possible numbers of species and sub-reactions in pyrolysis by analysing the second derivatives of TG (DDTG) curves. The pyrolysis of a medium density fibreboard (MDF) in nitrogen is studied in detail, and the DDTG curves are used to locate the temperature of peak mass-loss rate for each sub-reactions. Then, based on the TG data under multiple heating rates, the Kissinger's method is used to quickly find the possible range of values of the kinetic parameters (A and E). These ranges are used to accelerate the optimization of the inverse problem using genetic algorithm (GA) for the kinetic and stoichiometric parameters. The proposed method and the kinetic scheme found are shown to match the experimental data and are able to predict accurately results at different heating rate better than the Kissinger's method and faster than the regular GA search alone. The compensation effect and interdependence among kinetic parameters has been shown to weaken as the TG data available increases. Moreover, conducting TG experiment under multiple heating rates is crucial to obtain good kinetic parameters.
	TO cite this article:Li K,Huang X,Fleischmann C M, et al. Pyrolysis of Medium Density Fibreboard: Optimized Search for Kinetics Scheme and Parameters via Genetic Algorithm Driven by Kissinger's Method[J].


	2. Numerical Simulation of the Effect of Moving Train on Subway Station Fire
	Zhou Dechuang,Chen Juan,Zhang Yuan
	Security Science and Technology 14 May 2014
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	Abstract:The influence of moving train on subway station fire is simulated by Computational Fluid Dynamics in this paper. The characteristics of piston effect produced by one racing train and two trains racing vis-a-vis are studied respectively. On the basis of simulation, a three dimensional smoke velocity and temperature distribution are investigated. Simulation results show that the air velocity field is disturbed and smoke is stretched to further distance along the platform by a moving train. The smoke layer presents a 'S'-shaped distribution when the piston wind is caused by two trains flashing vis-à-vis, indicating that the smoke layer on the subway platform is diffused and it might be harmful for evacuation.
	TO cite this article:Zhou Dechuang,Chen Juan,Zhang Yuan. Numerical Simulation of the Effect of Moving Train on Subway Station Fire[OL].[14 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4597389


	3. An effective solvothermal reduction method for preparing reduced graphene oxide
	YUAN Bihe,BAO Chenlu,QIAN Xiaodong,WEN Panyue,XING Weiyi,SONG Lei,HU Yuan
	Security Science and Technology 07 January 2014
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	Abstract:In this work, an effective reduction method for graphite oxide (GO) based on solvothermal reaction is developed. The results from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) indicate that most of the oxygen functional groups in the GO are removed during the solvothermal reduction process. The reduction efficiency of this method is compared with previous reports about solvothermal reduction of GO. This work paves a way for the large-scale production of graphene.
	TO cite this article:YUAN Bihe,BAO Chenlu,QIAN Xiaodong, et al. An effective solvothermal reduction method for preparing reduced graphene oxide[J].


	4. In situ polymerization of functionalized graphene oxide /phosphoramide oligomer nanocomposites flame retardant: Preparation and its enhancements on fire safety of polypropylene
	YU Bin,WANG Xin,QIAN Xiaodong,XING Weiyi,SONG Lei,HU Yuan
	Security Science and Technology 02 January 2014
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	Abstract:In this work, Graphene oxide (GO) was modified by 4, 4 - diamino diphenyl methane (DDM) and then in situ incorporated into phosphoramide oligomer, resulting in the nanocomposite flame retardant (FRs-FGO) containing exfoliated graphene. Subsequently, the ?ame retardant (FRs-FGO) was incorporated into polypropylene (PP) and simultaneously compatilized with PP-grafted maleic anhydride. TEM results showed that the FGO was dispersed more uniformly in PP than the bare graphene oxide (GO), which was due to of strong interfacial interaction and the previous exfoliation of FGO in FRs before blending. The addition of FRs-FGO into PP led to a signi?cant improvement of the thermal stability at elevated temperature with higher char yields. Moreover, the crystallization and ?re safety properties of PP composites were also improved by the incorporation of FRs-FGO, including 11.4 C increase in crystallization temperature, 66.9% reduction in peak heat release rate, 24.4% decrease total heat release, and 73.0% decrease in ?re growth rate index. By contrast, simple blending of GO with FRs exhibited less improvement in fire safety properties than FRs-FGO, as suggested by cone results, resulting from the improved dispersion and thermal stability of FGO sheets. The flame retardant mechanism was due to the shielding effect of FGO and char layers, which could reduce the release of combustible gases and inhibit the mass and heat transfer between

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