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Monolithic metal-based/porous carbon nanocomposites made from dissolved cellulose for use in electrochemical capacitor

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Green Carbon 2024年第1期2卷 109-117页

作者： Madhav P.Chavhan Arjeta Kryeziu Somenath Ganguly Julien Parmentier University of Ostrava Faculty of Science30.dubna 22Ostrava 70103Czech Republic Universitéde Strasbourg Universitéde Haute-AlsaceInstitut de Science des Matériaux de Mulhouse(IS2M)UMR 7361 CNRS-UHA15 rue Jean StarckyBP 248868057 Mulhouse CedexFrance Indian Institute of Technology Kharagpur Department of Chemical EngineeringKharagpurIndia

Porous metal-based carbon nanocomposites,with a monolithic shape,were prepared by a one-pot synthesis from dissolved cellulose and metallic salts using a simple,cheap,and environmentally friendly *** potential performances as electrochemical capacitors were tested with three metal precursors(M=Cu,Mn,and Fe)with two loadings and in an asymmetric cell for the Fe-based carbon ***,here soluble metal precursors were not deposited on a hard cellulose template but mixed in a precooled concentrated NaOH solution where cellulose was previously dissolved,allowing for a good dispersion of the metallic *** a freezing step where concomitant cellulose regeneration and pore ice-templating phenomena took place,followed by a carbonization step,the mixture led to a porous carbon monolith embedding well-dispersed metal-based nanoparticles having a diameter below 20 nm and present as metallic,oxide,or carbide phase(s)according to the element *** materials were characterized by different physicochemical techniques and electrochemical *** performances as supercapacitors are discussed in light of the specific behaviour of the metal-based phase and its influence on the carbon matrix properties such as mesopore formation and carbon *** asymmetric energy storage cell assembled with a Fe-based carbon electrode against a carbon xerogel electrode derived from a phenolic resin shows specific energy and power of 18.3 Wh kg^(−1)at 5 mA cm^(−2)and 1.6 kW kg^(−1)at 25 mA cm^(−2),respectively.

关键词： Cellulose Metal-based carbon nanocomposite Nanoparticles Monolith Supercapacitor

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Multiobjective car relocation problem in one-way carsharingsystem

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Journal of Modern Transportation 2018年第4期26卷 297-314页

作者： Rabih Zakaria Mohammad Dib Laurent Moalic Université de Technologie et de Sciences Appliquées Libano-Francaise TripoliLebanon ENGIE 92930 Paris France uha Mulhouse France

In this paper, we present a multiobjective approach for solving the one-way car relocation *** fix three objectives that include the number of remaining rejected demands, the number of jockeys used for the relocation operations, and the total time used by these jockeys. For this sake, we propose to apply two algorithms namely NSGA-Ⅱ and an adapted memetic algorithm(MA) that we call MARPOCS which stands for memetic algorithm for the one-way carsharing system. The NSGA-Ⅱ is used as a reference to compare the performance of MARPOCS. The comparison of the approximation sets obtained by both algorithms shows that the hybrid algorithm outperforms the classical NSGA-Ⅱ and so solutions generated by the MARPOCS are much better than the solutions generated by NSGA-Ⅱ. This observation is proved by the comparison of different quality indicators’ values that are used to compare the performance of each algorithm. Results show that the MARPOCS is promising to generate very good solutions for the multiobjective car relocation problem in one-way carsharing system. It shows a good performance in exploring the search space and in finding solution with very good fitness values.

关键词： Carsharing Car relocation Integer linear programming(ILP) Multiobjective optimization Memetic algorithm NSGA-Ⅱ

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The combinatorics of Green＇s functions in planar field theories

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Frontiers of physics 2016年第6期11卷 1-23页

作者： Kurusch Ebrahimi-Fard Frederic Patras ICMAT C/Nicolds Cabrera no. 13-15 28049 Madrid Spain. On leave from UHA Mulhouse France Univ. de Nice Labo. J-A. Dieudonnd UMR 7351 CNRS Parc Valrose 06108 Nice Cedex 02 France

The aim of this exposition is to provide a detailed description of the use of combinatorial algebra in quantum field theory in the planar setting. Particular emphasis is placed on the relations between different types of planar Green’s functions. The primary object is a Hopf algebra that is naturally defined on variables representing non-commuting sources, and whose coproduct splits into two half-coproducts. The latter give rise to the notion of an unshuffle bialgebra. This setting allows a description of the relation between full and connected planar Green’s functions to be given by solving a simple linear fixed point equation. We also include a brief outline of the consequences of our approach in the framework of ordinary quantum field theory.

关键词： planar field theory Green’s functions free probability Hopf algebra shuffle algebra partitions

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Surface Modification of Barium Sulfate Particles

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Materials Sciences and Applications 2021年第1期12卷 1-14页

作者： Jérémy Longlade Christelle Delaite Anne-Sophie Schuller Laboratoire de Photochimie et d’Ingénierie Macromoléculaires Université de Haute Alsace (UHA) Mulhouse Cedex France

In this study, surface modification of barium sulfate was investigated using several model molecules for chemical treatment: ethanesulfonic acid, butyric acid, trimethoxy(propyl) silane and phosphoric acid 2-hydroxyethyl methacrylate. Samples were characterized by FT-IR and TGA to check the capability of these model molecules to interact with BaSO4 surface. The results pointed out the presence of an organic layer around the surface after the chemical treatment even after several washings to remove all species in excess. Model molecules were grafted onto BaSO4 surface and grafted density was determined. It reveals that phosphoric acid and carboxylic acid are the best candidates for the modification of BaSO4 surface. Both can be used as anchoring groups to modify the hydrophilic balance of barium sulfate surface in order to avoid the formation of aggregates and to improve the compatibility of this filler within hydrophobic polymer matrix.

关键词： Barium Sulfate Surface Modification Grafted Density

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Removal from Water and Adsorption onto Natural Quartz Sand of Hydroquinone

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Journal of Encapsulation and Adsorption Sciences 2015年第3期5卷 131-143页

作者： Hassan Ouachtak Rachid Ait Akbour Jamaa Douch Amane Jada Mohamed Hamdani Laboratoire de Chimie Physique Faculté des Sciences Agadir Université Ibn Zohr Agadir Morocco IS2M CNRS-UHA Mulhouse France

Hydroquinone (HQ) is the most important hydroxy aromatic compound which is produced on a large scale. Understanding its fate in the environment is therefore of primary importance to prevent its migration in the soil and/or the contamination of the aquatic ecosystems. Here we present a column based method to investigate the physicochemical processes controlling the removal from the aqueous phase and the adsorption onto natural quartz sand (NQS), of organic pollutant such as HQ molecules. We will focus on the interactions that occur between the organic pollutant and the NQS substrate. Thus, column reactors filled with NQS were used to investigate the influence of physicochemical parameters such as the ionic strength, the pH, the flow rate, and the nature of the electrolyte cation, on the HQ adsorption from water onto NQS substrate. The data indicate that, when divalent instead of monovalent cations, are present in the effluent water injection phase, and/or when the ionic strength of the effluent increases, the adsorbed HQ amount decreases. Similar decrease of the adsorbed HQ amount was also observed, at constant ionic strength, by increasing either, the pH from 3 to 9, the flow rate Q from 1 to 3 ml·mn-1, or by decreasing the HQ initial concentration, C0 from 30 to 6 mg·L-1. Further, large amount of the organic pollutant (up to 93 wt% of HQ molecules) was removed from the effluent water phase by using NQS column. The overall data seem to indicate that the adsorption of HQ molecules on the NQS surface is mainly controlled by electrostatic interaction forces occurring between the organic molecule polar groups and the inorganic matrix silanol groups.

关键词： Adsorption Hydroquinone Natural Quartz Sand Migration Porous Medium Surface Charge

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四川峨眉安吉儿国际幼稚园

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建筑学报 2013年第8期 58-63页

作者： Kamaljot Singh Panesar 胡晓陈旭成都尔本海柏建筑设计有限公司(uha) 成都指领名见建筑设计与咨询有限公司

项目坐落于四川峨眉山市胜利村甘河镇的一个新兴居住区内,周边只有小路为界,并无毗邻建筑。建筑的东、南、西边界都是6～10层的住宅北边可连接到一个新的水果蔬菜市场。学校通常会设置一个中心广场,所有与儿童有关的设施围绕中心广场布置,

关键词：峨眉山市四川国际毗邻建筑中心广场蔬菜市场居住区住宅

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Elaboration and Characterization of a Composite Material Based on <i>Canarium schweinfurthii</i>Engl Cores with a Polyester Matrix

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Materials Sciences and Applications 2020年第3期11卷 204-215页

作者： Dieunedort Ndapeu Francis Tamwo Morino Bernard Nganou Koungang Ghislain Tchuen Nicodème R. Sikame Tagne Sophie Bistac Ebénezer Njeugna Research Unit of Industrial Systems and Environmental Engineering (URISIE) UIT-FV Bandjoun University of Dschang Bandjoun Cameroon Research Unit of Mechanics and Physical Systems Modelling (UR2MSP) Department of Physics University of Dschang Dschang Cameroon Mechanics and Adapted Materials Laboratory (LAMMA) ENSET Douala Cameroon Physics and Macromolecular Engineering Laboratory (LPIM) UHA Mulhouse France

The aim of this work was to develop and characterize a polyester matrix composite material based on Canarium schweinfurthii Engl core granule. The particle size and the mass fractions of these cores used as fillers in this composite were the two optimization parameters. The experimentation of the twelve sample areas was based on the following optimization parameters: Three particles sizes of 80 1 2 3 ·m-3, which allows us to admit that this composite belongs to the family of light materials. The maximum compressive stress at break was obtained for the formulation 40% filler of size T3. This compressive stress at maximum rupture is in the range of 199.14 MPa. From 0% to 45% of filler, the flexural Young’s modulus of the composite increases whatever the particle size. The highest value is obtained for T2 particle size, i.e. 13.11 GPa. The static friction coefficient of the composite on wood increases as the filler content varies from 0.30 to 0.42. Thus, in view of the properties obtained, this composite can be used as alternative solutions in industrial applications, for the manufacturing of shoe heel, house ceiling, floors for housing and table support.

关键词： Canarium schweinfurthii Engl Characterization Composite Polyester Filler

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Ionic Liquids Mediated Ionothermal Process for the One-Step Synthesis of High Surface Area Alumina Supported Noble Metals

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Modern Research in Catalysis 2013年第2期2卷 28-35页

作者： Magali Bonne Pierrick Gaudin Yanlong Gu Francois Jerome Yannick Pouilloux Daniel Duprez Sebastien Royer Universite de Haute Alsace(uha) CNRSEquipe Materiaux a Porosite Controlee(MPC)Institut de Science des Materiaux de Mulhouse(IS2M)MulhouseFrance Universite de Poitiers Institut de Chimie des Milieux et Materiaux de Poitiers(IC2MP)PoitiersFrance Institute of Physical Chemistry and Industrial Catalysis Department of Chemistry and Chemical EngineeringUniversity of Science and TechnologyWuhanChina

Aluminas supported noble metal nanoparticles have been synthesized by a new ionothermal process. The method used is easy to implement and allows obtaining catalysts in one step with high specific surface area. In addi... 详细信息

关键词： Mesostructuration Alumina Noble Metals Ionothermal Process EISA

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Thermal Activation of Asymetrical Composites for Vibration Control

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Modern Mechanical Engineering 2013年第3期3卷 1-8页

作者： Axel Imbert Gildas L’Hostis David Rigel Rigel Fabrice Laurent Bernard Durand Centre Technique des Industrie Mécanique Centre Recherche Matériaux Textiles Mulhouse France fabrice.laurent@uha.fr Laboratoire de Physiques et Mécanique Ecole Nationale d’Ingénieur de Sud Alsace Mulhouse France Laboratoire de Physiques et Mécanique Ecole Nationale d’Ingénieur de Sud Alsace Mulhouse France Laboratoire de Physiques et Mécanique Ecole Nationale d’Ingénieur de Sud Alsace Mulhouse France Centre Technique des Industrie Mécanique Centre Recherche Matériaux Textiles Mulhouse France

The CBCM (Controlled Behaviour Composite Material) is a thermal active composite, which has been developed for morphing applications. The thermal activation is made by a source of heating generated within the composite structure. The coupling between the induced thermal field and the thermomechanical properties of the various components of the composite structure leads to the change of the structure shape. The heat source is generated by Joule effect, Carbon yarns inserted in the composite, are connected to a power supply. The application field of CBCM technology is the domain of shape modification and active assembly. The objective of this work is to illustrate the capabilities of CBCM in the domain of vibration control. We will study several reference plates with different constitution. The influences of these different constitutions, of the CBCM effect and the loss of stiffness for the matrix will be highlighted, for two boundary conditions, free/free and embedded/embedded.

关键词： Composite Material Vibration Control Smart Materials Active Structure

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薄膜中高分子结晶的亚稳态研究

薄膜中高分子结晶的亚稳态研究

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2009年全国高分子学术论文报告会

作者：马禹胡文兵 Günter Reite 南京大学化学化工学院高分子科学与工程系 Institut de Chimie des Surfaces et Interfaces ICSI-UHA-CNRS15rue Jean StarckyB.P.248868057 Mulhouse CedexFrance

＜正＞高分子在结晶时无法形成伸展链晶体,而是通过链折叠形成不同厚度,即具有不同稳定程度的片晶。在本文中,我们通过对PFS高分子在薄膜中复现自晶种技术,将绝大部分片晶融化掉,而最厚的即最稳定的区域则会幸存下来,做为晶种重结晶时... 详细信息

＜正＞高分子在结晶时无法形成伸展链晶体,而是通过链折叠形成不同厚度,即具有不同稳定程度的片晶。在本文中,我们通过对PFS高分子在薄膜中复现自晶种技术,将绝大部分片晶融化掉,而最厚的即最稳定的区域则会幸存下来,做为晶种重结晶时诱导大量籽晶体生长。

关键词：薄膜高分子结晶亚稳态现象自晶种技术

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