Etude des propriétés hydrodynamiques de polymères flexibles adsorbés à l'interface solide/liquide PDF Download
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Author: Philippe Déjardin
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Philippe Déjardin
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Abdelaziz Omari
Publisher:
ISBN:
Category :
Languages : fr
Pages : 171
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Book Description
02ETUDE DU PHENOMENE DE DEPLETION PRES DE LA PAROI POUR DES SOLUTIONS DE POLYMERES (POLYACRYLAMIDE, XANTHANE) EBN ECOULEMENT DANS DES MILIEUX POREUX DE TAILLE COMPARABLE A CELLE DES MACROMOLECULES. L'ETUDE MONTRE QUE L'EPAISSEUR DE LA COUCHE DE DEPLETION EST UNE CARACTERISTIQUE INTRASEQUE DU POLYMERE
Author: Abdelhamid Elaissari
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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LA STABILITE DE SUSPENSIONS COLLOIDALES EN PRESENCE DE POLYMERE DEPEND NON SEULEMENT DU DOSAGE EN POLYMERE MAIS AUSSI DE LA STRUCTURE DE LA COUCHE FORMEE PAR LE POLYMERE ADSORBE A L'INTERFACE. L'ETUDE DE LA CINETIQUE D'ADSORPTION DES POLYELECTROLYTES A MONTRE QUE LES STRUCTURES INTERFACIALES OBTENUS DEPENDENT DE LA VITESSE DE MISE EN CONTACT DES MACROMOLECULES AVEC L'ADSORBANT. LE CHANGEMENT DE CONFORMATION A ETE MIS EN EVIDENCE EN CONTROLANT LA VITESSE DE RECOUVREMENT. NOUS AVONS PU EXPLIQUER ET QUANTIFIER CE PHENOMENE GRACE A DES SIMULATIONS NUMERIQUES. IL A ETE MODELISE PAR UN PROCESSUS D'ADSORPTION ALEATOIRE DANS LEQUEL NOUS AVONS INTRODUIT LE PROCESSUS DE RELAXATION AFIN D'ETUDIER LA VARIATION TEMPORELLE DE L'AIRE MOYENNE D'UNE MACROMOLECULAIRE ADSORBEE. L'ETUDE DU MECANISME D'AGREGATION DE COLLOIDES INDUIT PAR LES POLYELECTROLYTES A MIS EN EVIDENCE L'INFLUENCE DE LA RECONFORMATION INTERFACIALE SUR LE MODE D'AGREGATION. LES CHANGEMENTS DE VARIATION DES CARACTERISTIQUES MOYENNES DES AGREGATS EN FONCTION DU TEMPS ONT PU ETRE CORRELES A LA CINETIQUE DE RECONFORMATION DU POLYMERE ADSORBE. EN ETABLISSANT UNE CORRELATION ENTRE LA VITESSE DE SEDIMENTATION ET LA MASSE DES AGREGATS, NOUS AVONS PU DETERMINER LA DIMENSION FRACTALE DES AGREGATS STABILISES PAR ADSORPTION DE POLYMERE. NOUS AVONS MIS EN EVIDENCE QUE LORSQUE LE PONTAGE EST FORME PAR DES MACROMOLECULES FLEXIBLES, LE PROCESSUS EST TOUJOURS DE TYPE CHIMIQUE (RLA). MAIS LORS DE NOTRE ETUDE DE L'AGREGATION EN PRESENCE DE POLYELECTROLYTES NON FLEXIBLES OU L'INSTABILITE EST INDUITE PAR PONTAGE INTERPARTICULAIRE, NOUS AVONS DEMONTRE L'EXISTENCE D'UN PROCESSUS DE TYPE DIFFUSIONNEL (DLA) POUR UN TAUX DE RECOUVREMENT TRES FAIBLE
Author: Jean-Louis Barrat
Publisher: Cambridge University Press
ISBN: 9780521789530
Category : Science
Languages : en
Pages : 410
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Book Description
Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: J. D. Van Der Waals
Publisher: Courier Corporation
ISBN: 9780486495934
Category : Science
Languages : en
Pages : 336
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Book Description
This much-cited thesis by J. D. van der Waals, the recipient of the 1910 Nobel Prize in physics, is accompanied by an introductory essay by J. S. Rowlinson and another work by van der Waals on the theory of liquid mixtures. 1988 edition.
Author: H. Baharvand
Publisher: John Wiley & Sons
ISBN: 1118540611
Category : Science
Languages : en
Pages : 438
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Book Description
Stem Cell Nanoengineering reviews the applications of nanotechnology in the fields of stem cells, tissue engineering, and regenerative medicine. Topics addressed include various types of stem cells, underlying principles of nanobiotechnology, the making of nano-scaffolds, nano tissue engineering, applications of nanotechnology in stem cell tracking and molecular imaging, nano-devices, as well as stem cell nano-engineering from bench to bedside. Written by renowned experts in their respective fields, chapters describe and explore a wide variety of topics in stem cell nanoengineering, making the book a valuable resource for both researchers and clinicians in biomedical and bioengineering fields.
Author: International Atomic Energy Agency
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 68
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Author: Yan Shao
Publisher: BoD – Books on Demand
ISBN: 9535100327
Category : Science
Languages : en
Pages : 254
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Book Description
Currently the research field of electrochemical cells is a hotspot for scientists and engineers working in advanced frontlines of micro-, nano- and bio-technologies, especially for improving our systems of energy generation and conversation, health care, and environmental protection. With the efforts from the authors and readers, the theoretical and practical development will continue to be advanced and expanded.
Author: Petros Antonis
Publisher:
ISBN: 9781681173085
Category :
Languages : en
Pages : 294
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Book Description
Heat is the kinetic energy of particles as they vibrate. If we heat the particles at one end of a material the particles at that end vibrate more (have more kinetic energy) and bump into the neighboring particles which causes them to vibrate more. They collide with their neighbors and so the energy passes from one particle to another through the material. Evaporation and condensation are two processes through which matter changes from one state to another. Matter can exist in three different states: solid, liquid, or gas. In evaporation, matter changes from a liquid to a gas. In condensation, matter changes from a gas to a liquid. All matter is made of tiny moving particles called molecules. Evaporation and condensation happen when these molecules gain or lose energy in the form of heat. Evaporation happens when a liquid is heated. The heat gives the liquid's molecules more energy. This energy causes the molecules to move faster. If they gain enough energy, the molecules near the surface break away. These molecules escape the liquid and enter the air as gas. Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy. As a result they slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid. The theoretical analysis and modeling of heat and mass transfer rates produced in evaporation and condensation processes are noteworthy concerns in a design of extensive range of industrial processes and devices. The book Evaporation, Condensation and Heat transfer emphasizes on the current issues of modeling on evaporation, water vapor condensation, heat transfer and exchanger, and on fluid flow in different aspects. The approaches would be applicable in various industrial purposes as well. The advanced idea and information described here will be fruitful for the readers to find a sustainable solution in an industrialized society..
