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Phosphorylated Salicylic Acid as Flame Retardant in Epoxy Resins and Composites

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Journal of Renewable Materials 2022年第7期10卷 1931-1950页

作者： Lara Greiner Philipp Kukla sebastian Eibl Manfred Döring Bundeswehr Research Institute for Materials Fuels and LubricantsErding85435Germany Fraunhofer Institute for Structural Durability and System Reliability LBF Darmstadt64289Germany Schill+Seilacher GmbH Böblingen71032Germany

A novel,versatile flame retardant substructure based on phosphorylated salicylic acid(SCP)is described and used in the synthesis of new flame retardants for HexFlowRTM6,a high-performance epoxy resin used in resin transfer molding processes as composite *** starting material salicylic acid can be obtained from natural *** as reactive phosphorus chloride is converted with a novolak,a novolak containing 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide(DOPO)substituents or DOPO-hydroquinone to flame retardants with sufficient thermal stability and high char ***,these flame retardants are soluble in the resin as well as react into the epoxy *** determined thermal stability and glass transition temperatures of flame retarded neat resin samples as well as the interlaminar shear strength of corresponding carbon fiber reinforced composite materials showed the applicability of these flame *** resin samples and composites were tested for their flammability by UL94 and/or flame-retardant performance by cone *** tested flame retardants decrease the peak of heat release rate by up to 54%for neat resin samples.A combination of DOPO and SCP in one flame retardant shows synergistic effects in char formation and the mode of action adapts to neat resin or fiber-reinforced samples,so there is efficient flame retardancy in both ***,a tailoring of SCP based flame retardants is ***,these flame retardants efficiently reduce fiber degradation during combustion of carbon fiber-reinforced epoxy resins as observed by scanning electron microscopy and energy dispersive X-ray spectroscopy.

关键词： Epoxy resin composite fiber protection bio-based flame retardant

Sputtering Deposition of Ultra-thin α-Fe_2O_3 Films for Solar Water Splitting

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Journal of Materials Science & Technology 2015年第6期31卷 655-659页

作者： Lichao Jia Karsten Harbauer Peter Bogdanoff Kluas Ellmer sebastian Fiechter Helmholtz-Zentrum Berlin fr Materialien und Energie Institute for Solar FuelsHahn-Meitner-Platz 114109 BerlinGermany

Ultra-thin α-Fe2O3（hematite） films have been deposited by radio frequency（RF） sputtering technique and photoelectrochemically investigated towards their ability to oxidize *** varying the deposition power and time as well as the sputter gas flow（argon）,the microstructure and morphology of the film were *** was found that the increment in the film thickness resulted in the loss of efficiency for solar water *** film with a thickness of 27 nm exhibited the best result with a maximum photocurrent of 0.25 mA cm-2at 1.23 *** of small amounts of O2to the sputter gas improved the photoactivity significantly.

关键词： Thin film Aematite Sputtering deposition Photoelec

Integration of bio-inspired limb-like structure damping into motor suspension of high-speed trains to enhance bogie hunting stability

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Railway Engineering Science 2024年第3期32卷 324-343页

作者： Heng Zhang Liang Ling sebastian Stichel Wanming Zhai State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China Department of Engineering Mechanics KTH Royal Institute of TechnologyStockholmSweden

Hunting stability is an important performance criterion in railway *** study proposes an incorporation of a bio-inspired limb-like structure(LLS)-based nonlinear damping into the motor suspension system for traction units to improve the nonlinear critical speed and hunting stability of high-speed trains(HSTs).Initially,a vibration transmission analysis is conducted on a HST vehicle and a metro vehicle that suffered from hunting motion to explore the effect of different motor suspension systems from on-track ***,a simplified lateral dynamics model of an HST bogie is established to investigate the influence of the motor suspension on the bogie hunting *** bifurcation analysis is applied to optimize the motor suspension parameters for high critical ***,the nonlinear damping of the bio-inspired LLS,which has a positive correlation with the relative displacement,can further improve the modal damping of hunting motion and nonlinear critical speed compared with the linear motor suspension ***,a comprehensive numerical model of a high-speed train,considering all nonlinearities,is established to investigate the influence of different types of motor *** simulation results are well consistent with the theoretical *** benefits of employing nonlinear damping of the bio-inspired LLS into the motor suspension of HSTs to enhance bogie hunting stability are thoroughly validated.

关键词： High-speed train Hunting stability Bio-inspired limb-like structure Motor suspension Nonlinear damping

Catalytic conversion of glucose to small polyols over a binary catalyst of vanadium modified beta zeolite and Ru/C

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Journal of Energy Chemistry 2019年第7期28卷 88-95页

作者： Joby sebastian Mingyuan Zheng Xinsheng Li Jifeng Pang Chan Wang Tao Zhang Dalian Institute of Chemical Physics Chinese Academy of Sciences

Catalytic conversion of glucose, the most abundant carbohydrate, to chemicals of petroleum origin has great desirability in terms of sustainability and industrial implementation. In this work, we attempted to exploit the vanadium-based catalysts with high retro-aldol condensation(RAC) activity for the synthesis of small polyols from glucose. Vanadium species incorporated or anchored beta zeolites were found to work effectively in synergy with 1 Ru/AC to produce hydroxyacetone(HA) as the major product(34%)in a semi-continuously stirred tank reactor under 5% glucose concentration. Catalyst characterization by UV-vis and Raman spectral analysis revealed vanadium species mainly stayed in the incorporated form(tetrahedral) at 0.5% of loading and in the supported form(octahedral) at higher loadings up to 8%. Pyridine infrared spectra and temperature programmed desorption of NH3 revealed weak Lewis acid sites in dominance. Vanadium species in the catalysts displayed multiple catalytic roles(isomerization and RAC reaction, and synergism with the hydrogenation catalyst) in the synthesis of HA from glucose. Structureactivity correlation pointed out that the catalytic activity of vanadium species is not dependent on it coordination status, nevertheless, the adjacent vanadium atoms could possibly improve the isomerization rate over the RAC rate in favor of high yield of HA. The catalyst system is recyclable to at least five times without any considerable loss in its activity and structural integrity. The results presented here provide a promising route for the sustainable production of HA and polyols from carbohydrates by using a highly selective vanadium catalyst.

关键词： Vanadium Glucose Retro-aldol condensation Polyols Hydroxyacetone

Classification and Analysis of Tube Hydroforming Processes with Respect to Adaptive FEM Simulations

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厦门大学学报（自然科学版） 2002年第S1期41卷 139-140页

作者： sebastian MOTSCH Matteo STRANO MTU Berli n-Brandenburg Aero Engines GmbH Entwicklung Rotormechanik MLE Adolf-Rohrbach-Str.10 D 14974 Ludwigsfelde GermanyUniversita' di Cassino Dipartimento di Ingegneria Industriale via di Biasio 4303043 Cassino (FR) ITALY)

Tube hydroforming process is a relative new process f or production of structural parts of low weight and high rigidity. The successfu lness of the process depends largely on the a proper selection of loading path w hich is axial feeding distance as related to the applied internal pressure. Due to the complicated nature of plastic deformation, a optimum loading path which w ill guarantee good hydroformed parts free of winkle and fracture has often to be determined by finite element analysis. In order to save trials and errors, adap tive FEM simulation method has been developed. To effectively apply the adaptive simulation method, we have to know the applicability of the method. In this pap er, a classification of tube hydroforming (THF) processes based on sensitivity to loading parameters has been suggested. Characteristics of the classification have been analyzed in terms of failure mode, dominant loading parameters and th eir working windows. It was discussed that the so called pressure dominant THF p rocess is the most difficult process for both simulation in FEM analysis and pra ctical operation in real manufacturing situation. To effectively find out the op timum loading path for pressure dominant THF process, adaptive FEM simulation st rategies are mostly needed.

关键词： tube hydroforming process classification loadin g path adaptive simulation

Dynamic MAWQA:Towards Efficient Real-time Optimization of Slow Dynamic Processes 36

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Dynamic MAWQA:Towards Efficient Real-time Optimization of Sl...

Vapor intrusion in buildings: Development of semi-empirical models including lateral separation between the building and the pollution source

第36届中国控制会议

作者： Weihua Gao sebastian Engell Biochemical and Chemical Engineering Department TU Dortmund

ISBN: (纸本)9781538629185

This paper deals with the real-time steady-state optimization of slow dynamic processes under plant-model mismatch.A novel scheme that iteratively adapts the process set-points（or operating parameters） to attain an economic optimum is *** on computing the next steady state from the process transient response to the current set-point change, this scheme can significantly reduce the time to reach the optimum steady state of slow dynamic processes. The key idea here is to integrate the modifier adaptation with quadratic approximation optimization scheme with a steady-state estimation algorithm. Simulation studies with two benchmark processes illustrate the performance of the proposed scheme.

关键词： Real-time optimization modifier adaptation quadratic approximation

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Building Simulation 2022年第12期15卷 2031-2049页

作者： Juan sebastian Rios Mora Thierno Diallo Bernard Collignan Marc Abadie Karim Limam Centre Scientifique et Technique du Batiment Health and Comfort DepartmentSaint-Martin-d'HèresCO 38400France University of La Rochelle Laboratoire des Sciences de I'Ingénieur pour I'Environnement-LaSIE UMR CNRS 7356La RochelleCO 17042France

Future constructions in the context of the industrial wastelands reuse may be exposed to Vapor Intrusion(VI).VI can be evaluated by combining in-situ measures and analytical models to evaluate exposure risk in future indoor ***,the assumptions in the existing models may reduce their accuracy when they do not meet the characteristics of real *** estimations of indoor concentration levels may lead to inappropriate solutions against *** this context,new semi-empirical models(SEM)are proposed in order to better specify pollution scenarios and thus increase the accuracy of VI *** development is based on a parametric study(numerical CFD)and a dimensionless analysis combined to existing VI models that consider a continuous source distribution in the *** expressions allow to better take into account the source position in the soil(*** and lateral source/building separation),soil properties(air permeability,diffusion coefficient of the pollutant,…)and building features(building foundation,indoor pressure,air exchange rate,…)in the estimation of indoor concentration *** obtained results with the proposed SEM were compared with a numerical CFD model and available experimental data,showing good accuracy in the estimation of *** the advantages of these new models,they can provide better precision in the health risk assessments associated with ***,these expressions can be easily integrated into building ventilation codes allowing to consider air exchange rate and indoor pressure variations over time.

关键词： indoor air quality lateral source/building distance polluted soils semi-empirical models vapor intrusion

Generation of Synthetic Transcriptome Data with Defined Statistical Properties for the Development and Testing of New Analysis Methods

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Genomics, Proteomics & Bioinformatics 2007年第1期5卷 45-52页

作者： Guillaume Brysbaert sebastian Noth Arndt Benecke Systems Epigenomics Group Institut des Hautes Etudes Scientifiques/Institut de Recherches InterdisciplinairesCNRS/INSERM 91440 Bures sur Yvette France

We have previously developed a combined signal/variance distribution model that accounts for the particular statistical properties of datasets generated on the Applied Biosystems AB1700 transcriptome system. Here we show that this model can be efficiently used to generate synthetic datasets with statistical properties virtually identical to those of the actual data by aid of the JAVA application *** creator 1.0 that we have developed. The fundamentally different structure of AB1700 transcriptome profiles requires re-evaluation, adaptation, or even redevelopment of many of the standard microarray analysis methods in order to avoid misinterpretation of the data on the one hand, and to draw full benefit from their increased specificity and sensitivity on the other hand. Our composite data model and the *** creator 1.0 application thereby not only present proof of the correctness of our parameter estimation, but also provide a tool for the generation of synthetic test data that will be useful for further development and testing of analysis methods.

关键词： transcriptome microarray analysis signal/variance distribution distribution modeling parameter approximation synthetic data generation

Finite Volume Evolution Galerkin Methods for the Shallow Water Equations with Dry Beds

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Communications in Computational Physics 2011年第7期10卷 371-404页

作者： Andreas Bollermann sebastian Noelle Maria Lukacova-Medvid’ova IGPM RWTH AachenTemplergraben 5552062 AachenGermany Institut fur Mathematik Universitat MainzStaudingerweg 955099 MainzGermany.

We present a new Finite Volume Evolution Galerkin(FVEG)scheme for the solution of the shallow water equations(SWE)with the bottom topography as a source *** new scheme will be based on the FVEG methods presented in(Noelle and Kraft,***.,221(2007)),but adds the possibility to handle dry *** most important aspect is to preserve the positivity of the water *** present a general approach to ensure this for arbitrary finite volume *** main idea is to limit the outgoing fluxes of a cell whenever they would create negative water ***,this corresponds to the absence of fluxes in the presence of *** is then re-established by splitting gravitational and gravity driven parts of the ***,a new entropy fix is introduced that improves the reproduction of sonic rarefaction waves.

关键词： Well-balanced schemes dry boundaries shallow water equations evolution Galerkin schemes source terms