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Author: Jerôme Laurent
Publisher:
ISBN:
Category :
Languages : fr
Pages : 219
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Book Description
AU COURS DE CE TRAVAIL, NOUS AVONS ETUDIE LES MODIFICATIONS SUPERFICIELLES ENGENDREES SUR UN POLYMERE PAR UN RAYONNEMENT LASER. DANS UNE PARTIE BIBLIOGRAPHIQUE, NOUS AVONS MIS EN EVIDENCE LES DIFFERENTS TYPES DE MODIFICATIONS OBTENUS A PARTIR DES TRAITEMENTS DE SURFACE USUELS, ET NOUS AVONS MONTRE QUE LES LASERS A EXCIMERE SONT LES PLUS ADEQUATS POUR TRAITER LES POLYMERES, LES LASERS INFRAROUGE ETANT EN GENERAL RESERVES AUX TRAVAUX DE DECOUPE OU SOUDURE DES MATERIAUX METALLIQUES. CONTRAIREMENT AUX NOMBREUSES ETUDES VISANT A GRAVER DES POLYMERES UTILISES EN MICRO-ELECTRONIQUE, NOUS AVONS ORIENTE NOS TRAVAUX SUR LA FONCTIONNALISATION DE MATERIAUX DE GRANDE CONSOMMATION (POLYETHYLENE ET POLYPROPYLENE) AYANT UN FAIBLE COEFFICIENT D'ABSORPTION DANS L'ULTRAVIOLET. L'IMPORTANT N'EST PLUS D'AVOIR UNE DENSITE D'ENERGIE TRES IMPORTANTE, MAIS DE TRAITER LA SURFACE A L'AIDE D'UN FAISCEAU AYANT UNE TRES BONNE REPARTITION EN ENERGIE. POUR UNE FOURCHETTE DE PARAMETRES DE TRAITEMENT TRES ETROITE, LA MOUILLABILITE DE CES MATERIAUX EST AUGMENTEE ET LE CALCUL DES COMPOSANTES DE L'ENERGIE DE SURFACE INDIQUENT LA FORMATION DE FONCTIONS NON DISPERSIVES. DES MESURES ESCA METTENT EFFECTIVEMENT EN EVIDENCE LA PRESENCE DE FONCTIONS HYDROXYLE, CARBONYLE ET CARBOXYLE. LA SPECTROSCOPIE UV PERMET EGALEMENT DE SUIVRE LES MODIFICATIONS DE SURFACE EN FONCTION DES PARAMETRES DE TRAITEMENT. NOUS AVONS PROPOSE DES MECANISMES DE MODIFICATIONS DU PE ET PP SE PRODUISANT LORS DE L'INTERACTION LASER/MATIERE ET NOUS AVONS MONTRE QUE SUITE AU TRAITEMENT, LES PROPRIETES D'ADHERENCE DES DEUX POLYOLEFINES VIS A VIS D'UN ADHESIF EPOXYDE SONT AMELIOREES. A PARTIR DE CES RESULTATS, NOUS AVONS EGALEMENT MIS EN EVIDENCE L'AMELIORATION DES PROPRIETES D'ADHERENCE D'UN MATERIAU COMPOSITE EPOXY/CARBONE. A FAIBLE FLUENCE, ELLE EST DUE A L'ELIMINATION D'UNE COUCHE DE POLLUTION ET A UN LEGERE OXYDATION DE SURFACE. A PLUS FORTE FLUENCE, L'ABLATION DE LA COUCHE SUPERFICIELLE DE RESINE FAVORISE L'ACCROCHAGE MECANIQUE DE L'ADHESIF SUR LES FIBRES DE CARBONE ET LES CONTRAINTES DE CISAILLEMENT PASSENT DE 5 A 29 MPA.
Author: Jerôme Laurent
Publisher:
ISBN:
Category :
Languages : fr
Pages : 219
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Book Description
AU COURS DE CE TRAVAIL, NOUS AVONS ETUDIE LES MODIFICATIONS SUPERFICIELLES ENGENDREES SUR UN POLYMERE PAR UN RAYONNEMENT LASER. DANS UNE PARTIE BIBLIOGRAPHIQUE, NOUS AVONS MIS EN EVIDENCE LES DIFFERENTS TYPES DE MODIFICATIONS OBTENUS A PARTIR DES TRAITEMENTS DE SURFACE USUELS, ET NOUS AVONS MONTRE QUE LES LASERS A EXCIMERE SONT LES PLUS ADEQUATS POUR TRAITER LES POLYMERES, LES LASERS INFRAROUGE ETANT EN GENERAL RESERVES AUX TRAVAUX DE DECOUPE OU SOUDURE DES MATERIAUX METALLIQUES. CONTRAIREMENT AUX NOMBREUSES ETUDES VISANT A GRAVER DES POLYMERES UTILISES EN MICRO-ELECTRONIQUE, NOUS AVONS ORIENTE NOS TRAVAUX SUR LA FONCTIONNALISATION DE MATERIAUX DE GRANDE CONSOMMATION (POLYETHYLENE ET POLYPROPYLENE) AYANT UN FAIBLE COEFFICIENT D'ABSORPTION DANS L'ULTRAVIOLET. L'IMPORTANT N'EST PLUS D'AVOIR UNE DENSITE D'ENERGIE TRES IMPORTANTE, MAIS DE TRAITER LA SURFACE A L'AIDE D'UN FAISCEAU AYANT UNE TRES BONNE REPARTITION EN ENERGIE. POUR UNE FOURCHETTE DE PARAMETRES DE TRAITEMENT TRES ETROITE, LA MOUILLABILITE DE CES MATERIAUX EST AUGMENTEE ET LE CALCUL DES COMPOSANTES DE L'ENERGIE DE SURFACE INDIQUENT LA FORMATION DE FONCTIONS NON DISPERSIVES. DES MESURES ESCA METTENT EFFECTIVEMENT EN EVIDENCE LA PRESENCE DE FONCTIONS HYDROXYLE, CARBONYLE ET CARBOXYLE. LA SPECTROSCOPIE UV PERMET EGALEMENT DE SUIVRE LES MODIFICATIONS DE SURFACE EN FONCTION DES PARAMETRES DE TRAITEMENT. NOUS AVONS PROPOSE DES MECANISMES DE MODIFICATIONS DU PE ET PP SE PRODUISANT LORS DE L'INTERACTION LASER/MATIERE ET NOUS AVONS MONTRE QUE SUITE AU TRAITEMENT, LES PROPRIETES D'ADHERENCE DES DEUX POLYOLEFINES VIS A VIS D'UN ADHESIF EPOXYDE SONT AMELIOREES. A PARTIR DE CES RESULTATS, NOUS AVONS EGALEMENT MIS EN EVIDENCE L'AMELIORATION DES PROPRIETES D'ADHERENCE D'UN MATERIAU COMPOSITE EPOXY/CARBONE. A FAIBLE FLUENCE, ELLE EST DUE A L'ELIMINATION D'UNE COUCHE DE POLLUTION ET A UN LEGERE OXYDATION DE SURFACE. A PLUS FORTE FLUENCE, L'ABLATION DE LA COUCHE SUPERFICIELLE DE RESINE FAVORISE L'ACCROCHAGE MECANIQUE DE L'ADHESIF SUR LES FIBRES DE CARBONE ET LES CONTRAINTES DE CISAILLEMENT PASSENT DE 5 A 29 MPA.
Author: Vincent Granier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 215
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Book Description
INTERPRETATION DES RESULTATS GRACE A UN MODELE DIT DE "L'INTERFACE MOUVANTE". ETUDE DES MODIFICATIONS DE SURFACE DE POLYMERES OBTENUES PAR IRRADIATION A BASSE INTENSITE (LAMPE) ET HAUTE INTENSITE (LASER)
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: Alexandru Grumezescu
Publisher: Academic Press
ISBN: 0128043784
Category : Science
Languages : en
Pages : 926
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Book Description
Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
Author: Xian Jun Loh
Publisher: Springer
ISBN: 9812871527
Category : Technology & Engineering
Languages : en
Pages : 229
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Book Description
This book presents the research involving in situ gelling polymers and can be used as a guidebook for academics, industrialists and postgraduates interested in this area. This work summaries the academic contributions from the top authorities in the field and explore the fundamental principles of in situ gelling polymeric networks, along with examples of their major applications. This book aims to provide an up-to-date resource of in situ gelling polymer research.
Author: Antonio Pizzi
Publisher: CRC Press
ISBN: 9004190937
Category : Technology & Engineering
Languages : en
Pages : 464
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Book Description
Wood adhesives are of tremendous industrial importance, as more than two-thirds of wood products in the world today are completely or partially bonded together using a variety of adhesives. Adhesive bonding offers many advantages over other joining methods for wood components, and there has been a great deal of R& D activity in devising new wood adhesives or improving the existing ones. The modern mantra in all industrial sectors is: "think green, go green," which has attracted much attention in the wood adhesive industry. Therefore, there is also a lot of research activity in synthesizing environmentally benign and human-friendly wood adhesives. This book is divided into four parts: Part 1: Fundamental Adhesion Aspects in Wood Bonding; Part 2: Synthetic Adhesives; Part 3: Environment-friendly adhesives; and Part 4: Wood Welding and General Paper. It addresses many different types of wood adhesives, as well as bonding (welding) of wood components without adhesives, a more recent development. The information contained in this book is valuable for individuals engaged in all aspects of wood adhesion and adhesives and, hopefully, will inspire new ideas in wood adhesives, a topic of vital industrial importance.
Author: Jean-Marie Basset
Publisher: John Wiley & Sons
ISBN: 3527627103
Category : Science
Languages : en
Pages : 725
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Book Description
Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Author: John Henry Lorentz
Publisher: Historical Dictionaries of Asia, Oceania, and the Middle East
ISBN:
Category : History
Languages : en
Pages : 570
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Book Description
Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Author: Paolo Mele
Publisher:
ISBN: 9781536160864
Category : Zinc oxide thin films
Languages : en
Pages : 0
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Book Description
Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Author:
Publisher:
ISBN: 9780387134833
Category : Membranes (Biology)
Languages : en
Pages : 165
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Book Description
