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Author: Amel Terras
Publisher:
ISBN:
Category :
Languages : fr
Pages : 186
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Book Description
Cette thèse porte sur la compréhension et la caractérisation de l'interface fibre-matrice au sein d'un composite auto-renforcé à matrice et fibre polypropylène. Ce travail a été réalisé dans le cadre du projet FUI « Composite2020 » qui vise à développer des composites par imprégnation en voie sèche et mise en forme par thermoformage. Dans un premier temps, l'étude a porté sur les phénomènes mis en jeu dans la création de l'interface/interphase : i) la mouillabilité de la fibre par la matrice, ii) la mobilité des chaînes macromoléculaires et iii) l'aptitude des chaînes à la cristallisation. Un bon mouillage entraînant un contact intime entre fibre et matrice, la mesure de l'énergie de surface permet d'évaluer les interactions mises en jeu et de déterminer le travail d'adhésion thermodynamique de l'interface résultante. La mobilité des chaînes macromoléculaires présentes à l'interface entre la surface de la matrice et celle des renforts, dépendante de la température et du temps appliqués, induit une interdiffusion des chaînes dont les enchevêtrements vont générer l'interphase et assurer l'autoadhésion du composite. Enfin, la capacité de cristalliser de la matrice au contact des fibres peut créer une morphologie cristalline locale à l'interface différente de celle au coeur de la matrice. Dans un second temps, l'interface est caractérisée mécaniquement aux échelles microscopique et macroscopique, au moyen des essais de pull-out et de traction hors-axes respectivement. Les phénomènes mis en jeu dans la création de l'interface/interphase dépendant des conditions (temps- températures) appliqués lors de l'élaboration des échantillons, permettent l'obtention d'interfaces aux propriétés différentes. Dans un dernier temps, la recyclabilité du composite auto-renforcé est étudiée : la miscibilité des phases en présence est analysée, et les propriétés mécaniques des pièces recyclées (non renforcées) sont testées en comparaison avec celles de la matrice initiale vierge, afin d'attester de la capacité de ce composite à une seconde vie.
Author: Amel Terras
Publisher:
ISBN:
Category :
Languages : fr
Pages : 186
Get Book Here
Book Description
Cette thèse porte sur la compréhension et la caractérisation de l'interface fibre-matrice au sein d'un composite auto-renforcé à matrice et fibre polypropylène. Ce travail a été réalisé dans le cadre du projet FUI « Composite2020 » qui vise à développer des composites par imprégnation en voie sèche et mise en forme par thermoformage. Dans un premier temps, l'étude a porté sur les phénomènes mis en jeu dans la création de l'interface/interphase : i) la mouillabilité de la fibre par la matrice, ii) la mobilité des chaînes macromoléculaires et iii) l'aptitude des chaînes à la cristallisation. Un bon mouillage entraînant un contact intime entre fibre et matrice, la mesure de l'énergie de surface permet d'évaluer les interactions mises en jeu et de déterminer le travail d'adhésion thermodynamique de l'interface résultante. La mobilité des chaînes macromoléculaires présentes à l'interface entre la surface de la matrice et celle des renforts, dépendante de la température et du temps appliqués, induit une interdiffusion des chaînes dont les enchevêtrements vont générer l'interphase et assurer l'autoadhésion du composite. Enfin, la capacité de cristalliser de la matrice au contact des fibres peut créer une morphologie cristalline locale à l'interface différente de celle au coeur de la matrice. Dans un second temps, l'interface est caractérisée mécaniquement aux échelles microscopique et macroscopique, au moyen des essais de pull-out et de traction hors-axes respectivement. Les phénomènes mis en jeu dans la création de l'interface/interphase dépendant des conditions (temps- températures) appliqués lors de l'élaboration des échantillons, permettent l'obtention d'interfaces aux propriétés différentes. Dans un dernier temps, la recyclabilité du composite auto-renforcé est étudiée : la miscibilité des phases en présence est analysée, et les propriétés mécaniques des pièces recyclées (non renforcées) sont testées en comparaison avec celles de la matrice initiale vierge, afin d'attester de la capacité de ce composite à une seconde vie.
Author: Jörg Müssig
Publisher: John Wiley & Sons
ISBN: 9780470660348
Category : Science
Languages : en
Pages : 560
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Book Description
Natural fibres are becoming increasingly popular for use in industrial applications, providing sustainable solutions to support technical innovation. These versatile, natural based materials have applications in a wide range of industries, from textiles and consumer products to the automotive and construction industries. Industrial Applications of Natural Fibres examines the different steps of processing, from natural generation, fibre separation and fibre processing, to the manufacturing of the final product. Each step is linked to fibre properties and characterization, highlighting how different fibres influence the product properties through a discussion of their chemical and structural qualities. Considering the value-added chain from natural generation to final product, with emphasis on quality management, this book reviews the current research and technical applications of natural fibres. Topics covered include: Introduction to the Chemistry and Biology of Natural Fibres Economic Aspects of Natural Fibres Vegetable Fibres Animal Fibres Testing and Quality Management Applications: Current and Potential Industrial Application of Natural Fibres will be a valuable resource for scientists in industry and academia interested in the development of natural based materials and products. It is particularly relevant for those working in chemical engineering, sustainable chemistry, agricultural sciences, biology and materials sciences.
Author: Sanjay Mavinkere Rangappa
Publisher: John Wiley & Sons
ISBN: 3527349308
Category : Technology & Engineering
Languages : en
Pages : 372
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Book Description
Natural and Synthetic Fiber Reinforced Composites Discover a comprehensive exploration of fiber reinforced polymers by an expert team of editors Fiber reinforced polymer (FRP) composites offer several unique properties that make them ideal for use in a wide range of industries, from automotive and aerospace to marine, construction, and co-industrial. In Natural and Synthetic Fiber Reinforced Composites: Synthesis, Properties and Applications, a distinguished team of mechanical engineers delivers a comprehensive overview of fiber reinforced composites. This edited volume includes thorough discussions of glass-, cotton-, and carbon-fiber reinforced materials, as well as the tribological properties and non-structural applications of synthetic fiber composites. Readers will also find practical explorations of the structural evolution, mechanical features, and future possibilities of fiber, textile, and nano-cementitious materials. The physical and chemical properties of cotton fiber-based composites are explored at length, as are the extraordinary mechanical, thermal, electrical, electronic, and field emission properties of carbon nanotubes. This singular book also includes: A thorough discussion of recent advancements in natural fiber reinforced polymer composites, their implications, and the opportunities that arise as a result A comprehensive exploration of the thermal behavior of natural fiber-based composites An insightful review of the literature on sisal fiber with polymer matrices A response to the growing research gap in the existing literature regarding natural fiber-based polymer composites and solutions to address it Perfect for scientists, engineers, professors, and students working in areas involving natural and synthetic reinforced polymers and composites, Natural and Synthetic Fiber Reinforced Composites: Synthesis, Properties and Applications offers a one-of-a-kind resource to help readers understand a critical and rapidly evolving technology.
Author: Ramesh C. Chandan
Publisher: John Wiley & Sons
ISBN: 0470276533
Category : Technology & Engineering
Languages : en
Pages : 376
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Book Description
Melding the hands-on experience of producing yogurt and fermented milks over four decades with the latest in scientific research in the dairy industry, editor Chandan and his associate editors have assembled experts worldwide to write Manufacturing Yogurt and Fermented Milks. This one-of-a-kind resource gives a complete description of the manufacturing stages of yogurt and fermented milks from the receipt of raw materials to the packaging of the products. Information is conveniently grouped under four categories: · Basic background—History and consumption trends, milk composition characteristics, dairy processing principles, regulatory requirements, laboratory analysis, starter cultures, packaging, and more · Yogurt manufacture—Fruit preparations and flavoring materials, ingredients, processing principles, manufacture of various yogurt types, plant cleaning and sanitizing, quality assurance, and sensory analysis · Manufacture of fermented milks—Procedure, packaging and other details for more than ten different types of products · Health benefits—Functional foods, probiotics, disease prevention, and the health attributes of yogurt and fermented milks All manufacturing processes are supported by sound scientific, technological, and engineering principles. Manufacturing Yogurt and Fermented Milks is designed for professionals in the dairy and food industry as well as for upper level undergraduate and graduate students majoring in Food Science, Dairy Technology and related fields. Industry professionals, professors, and students engaged in research in dairy/ food science will find the book’s contemporary information and experience-based applications invaluable.
Author: Swati Sharma
Publisher: Springer
ISBN: 3030029018
Category : Technology & Engineering
Languages : en
Pages : 235
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Book Description
This book provides information about the sources, structure, and properties of keratin as well as its applications. The extraction from different biomass sources (e.g. feathers, hairs, nails, horn, hoof, and claws) as well as the characterization methods of these extracted materials are explained. The development of bioproducts from keratins is challenging and limited since they are neither soluble in polar solvents nor in non-polar solvents. Therefore, the utilization of different microorganisms for the degradation of keratin is also discussed. The main aim of this book is to highlight the unique features of keratin and to update readers with the possible prospects to develop various value-added products from keratins. The book is highly interesting to researchers working in industry and academia on bioproducts, tissue engineering, biocomposites, biofilm, and biofibers.
Author: Alma THULE
Publisher: Woodhead Publishing
ISBN: 0857099221
Category : Technology & Engineering
Languages : en
Pages : 409
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Book Description
The use of natural fibres as reinforcements in composites has grown in importance in recent years. Natural Fibre Composites summarises the wealth of significant recent research in this area. Chapters in part one introduce and explore the structure, properties, processing, and applications of natural fibre reinforcements, including those made from wood and cellulosic fibres. Part two describes and illustrates the processing of natural fibre composites. Chapters discuss ethical practices in the processing of green composites, manufacturing methods and compression and injection molding techniques for natural fibre composites, and thermoset matrix natural fibre-reinforced composites. Part three highlights and interprets the testing and properties of natural fibre composites including, non-destructive and high strain rate testing. The performance of natural fibre composites is examined under dynamic loading, the response of natural fibre composites to impact damage is appraised, and the response of natural fibre composites in a marine environment is assessed. Natural Fibre Composites is a technical guide for professionals requiring an understanding of natural fibre composite materials. It offers reviews, applications and evaluations of the subject for researchers and engineers. - Introduces and explores the structure, properties, processing, and applications of natural fibre reinforcements, including those made from wood and cellulosic fibres - Highlights and interprets the testing and properties of natural fibre composites, including non-destructive and high strain rate testing - Examines performance of natural fibre composites under dynamic loading, the response of natural fibre composites to impact damage, and the response of natural fibre composites in a marine environment
Author: Günther Schuh
Publisher: Springer Science & Business Media
ISBN: 3642244912
Category : Technology & Engineering
Languages : en
Pages : 393
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Book Description
To meet and adapt to the current and future trends and issues in technology and society, the science committee of The German Academic Society for Production Engineering (WGP) continues to define future topics for production technology. These themes represent not only the key focus for the scientific work of the WGP, but also the central themes of the first annual conference in June 2011, whose paper is publically available in this volume. Such themes, including electric mobility, medical technology, lightweight construction, and resource efficiency, as well as mass production ability have all been identified as future, large-scale, and long-term drivers of change. Future trends influence changes sustainably and fundamentally; they permeate society, technology, economics, and value systems and have an effect in virtually all areas of life. The WGP has, as part of its research, established for itself the goal of not only observing these emerging changes, but also of supervising and influencing their development in order to ensure steady progress, secure sustainability, and shape the future.
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: Mohammad Hossein Davood Abadi Farahani
Publisher: BoD – Books on Demand
ISBN: 1789847389
Category : Technology & Engineering
Languages : en
Pages : 132
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Book Description
Undoubtedly, drinking water of an acceptable quality has become a scarce commodity. Water shortage is becoming a major concern all around the world due to limited freshwater resources as well as the high cost of freshwater transportation from freshwater-rich areas to arid areas. As a result, solutions such as water recycling and desalination of saline or brackish water are being introduced and emerging worldwide as alternative ways of supplying water. Desalination of seawater is known to be one of mankind’s earliest forms of water treatment, and it has become one of the most sustainable alternative solutions to provide freshwater for many communities and industrial sectors. This book aims to cover the challenges and opportunities in desalination processes.
Author: Ramy Harik
Publisher: Springer
ISBN: 3319546600
Category : Business & Economics
Languages : en
Pages : 652
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Book Description
This book constitutes the refereed proceedings of the 13th IFIP WG 5.1 International Conference on Product Lifecycle Management, PLM 2016, held in Columbia, SC, USA, in July 2016. The 57 revised full papers presented were carefully reviewed and selected from 77 submissions. The papers are organized in the following topical sections: knowledge sharing, re-use and preservation; collaborative development architectures; interoperability and systems integration; lean product development and the role of PLM; PLM and innovation; PLM tools; cloud computing and PLM tools; traceability and performance; building information modeling; big data analytics and business intelligence; information lifecycle management; industry 4.0; metrics, standards and regulation; and product, service and systems.
