The presented work is a part of the ongoing effort on the development of high performance bio-based composites with enhanced durability, under static and dynamic mechanical loading including the exposure to elevated humidity. The impact of relative humidity on the performance of cellulosic fibers (natural and regenerated), bio-based resins and their composites was studied. The material performance was rated against the data for glass fiber epoxy, as the reference. The comparison of water absorption results for unreinforced resins and for composites showed that the cellulosic reinforcement is primarily responsible for the transport and uptake of moisture in the composites. The effect of chemical treatment on the cellulosic fibers, as a protection against moisture, was evaluated. However, the treatment did not improve the moisture resistance in composites significantly. Quasi-static tensile tests revealed that some of the bio-based resins and their composites performed very well and comparable to the composites of synthetic epoxy, even at high humidity. However, any structural material is supposed to hold mechanical loads over a long service time and most often in harsh environmental conditions. Hence, tension-tension fatigue tests were performed on the fiber bundles as well as on the composites. The fibers of choice as the reinforcement for further mechanical testing were regenerated cellulose fibers (RCF), mainly owing to the stable geometry and properties. Due to the high nonlinearity of RCF, the fatigue tests were limited in number and the focus was on analyzing the mechanisms underlying the fatigue behavior rather than on constructing S-N curves. Strain evolution of the bio-based composites during the dynamic fatigue was very similar to that observed in the static fatigue (creep). It confirmed the strong influence of viscoelastic and viscoplastic phenomena on the overall performance of the material under the rapid loading conditions in fatigue. Since the durability of composites greatly depends on the material¿s ability to stand the internal damages (e.g. debonding, microcracking, delaminations), the interfacial properties in the bio-based composites were addressed. To investigate the fracture toughness of bio-based composites, the double cantilever beam (DCB) tests were carried out, under static and dynamic loading. Moreover, the DCB results were utilized as a measure of the fiber chemical treatment¿s efficiency to improve the adhesion between RCF and the resin. The nonlinearity of RCF strongly influenced the results obtained from DCB tests, which complicated the analysis regarding the effectiveness of the fiber surface treatment. Nevertheless, this study brings forward the issues that have to be dealt with, in order to characterize and predict the performance of these composite materials with highly nonlinear reinforcing fibers. Overall, the results presented in this thesis give an insight into the behavior of bio-based composites, at various environments and under different types of mechanical loading. Based on these findings, the potential use of these materials in structural applications can be assessed.

Since synthetic plastics derived from fossil resources are mostly non-biodegradable, many academic and industrial researchers have shifted their attention toward bio-based materials, which are more eco-friendly. Bio-Based Composites for High-Performance Materials: From Strategy to Industrial Application provides an overview of the state-of-art in bio-based composites. The book integrates knowledge from various disciplines including plant science, materials science, polymer chemistry, chemical engineering, and nanotechnology. It discusses the raw materials used in bio-based composites, basic design principles, properties, applications, and life cycle assessments. The book also presents a strategic and policy-oriented view of these composites and considers the costs of retrofitting existing chemical production plants for bio-based composite manufacture. It is a definitive resource on bio-composites for academics, regulatory agencies, research and development communities, and industries worldwide.

Biocomposites – Bio-based Fibres and Polymers from Renewable Resources: Processing, Performance, Durability and Applications provides a systematic and comprehensive review of recent developments in this important area of research. Chapters discuss novel techniques for processing and the characterization of biocomposites derived from renewable resources, focusing on durability, strength prediction, aging methods and performance evaluation. Future trends, directions and opportunities are also addressed. Readers will find an up-to-date summary of recent research findings that have been conducted on biocomposites, making this an essential reference resource for academic and industrial researchers and anyone working in the development of innovative materials from renewable resources. - Provides wide coverage of processing methods, mechanical performance and industrial applications - Emphasizes durability assessment of natural fiber composites in different environments

Explore the world of biocomposites with this one-stop resource edited by four international leaders in the field Bio-based Composites: Characterization, Properties, and Applications delivers a comprehensive treatment of all known characterization methods, properties, and industry applications of bio-based composites materials. This unique, one-stop resource covers all major developments in the field from the last decade of research into this environmentally beneficial area. The internationally recognized editors have selected resources that represent advances in the mechanical, thermal, tribological, and water sorption properties of bio-based composites, and cover new areas of research in physico-chemical analysis, flame retardancy, failure mechanisms, lifecycle assessment, and modeling of bio-based composites. The low weight, low cost, excellent thermal recyclability, and biodegradability of bio-based composites make them ideal candidates to replace engineered plastic products derived from fossil fuel. This book provides its readers with the knowledge they’ll require to understand a new class of materials increasingly being used in the automotive and packaging industries, aerospace, the military, and construction. It also includes: An extended discussion of the environmental impact of bio-based composites using a lice cycle methodology A review of forecasts of natural fiber reinforced polymeric composites and its degradability concerns An analysis of the physical and mechanical properties of a bio-based composite with sisal powder A comprehensive treatment of the mechanical, thermal, tribological, and dielectric properties of bio-based composites A review of processing methods for the manufacture of bio-based composites Perfect for materials scientists in private industry, government laboratories, or engaged in academic research, Bio-Based Composites will also earn a place in the libraries of industrial and manufacturing engineers who seek a better understanding of the beneficial industrial applications of biocomposites in industries ranging from automobiles to packaging.

Explore the world of biocomposites with this one-stop resource edited by four international leaders in the field Biobased Composites: Processing, Characterization, Properties, and Applications delivers a comprehensive treatment of all known characterization methods, properties, and industry applications of biobased composites materials. This unique, one-stop resource covers all major developments in the field from the last decade of research into this environmentally beneficial area. The internationally recognized editors have selected resources that represent advances in the mechanical, thermal, tribological, and water sorption properties of biobased composites, and cover new areas of research in physico-chemical analysis, flame retardancy, failure mechanisms, lifecycle assessment, and modeling of biobased composites. The low weight, low cost, excellent thermal recyclability, and biodegradability of biobased composites make them ideal candidates to replace engineered plastic products derived from fossil fuel. This book provides its readers with the knowledge they'll require to understand a new class of materials increasingly being used in the automotive and packaging industries, aerospace, the military, and construction. It also includes: An extended discussion of the environmental impact of biobased composites using a life cycle methodology A review of forecasts of natural fiber reinforced polymeric composites and its degradability concerns An analysis of the physical and mechanical properties of a biobased composite with sisal powder A comprehensive treatment of the mechanical, thermal, tribological, and dielectric properties of biobased composites A review of processing methods for the manufacture of biobased composites Perfect for materials scientists in private industry, government laboratories, or engaged in academic research, Biobased Composites will also earn a place in the libraries of industrial and manufacturing engineers who seek a better understanding of the beneficial industrial applications of biocomposites in industries ranging from automobiles to packaging.

The development of environmentally sustainable materials and practices that are less harmful to the environment is of great necessity. Wood polymer composites (WPCs) derived from bio-based polymers offer a much-needed alternative to conventional petroleum-based WPCs (derived from petroleum-based thermoplastics). Bio-based WPCs are a class of composites offering a wide range of potential application as a building material. These bio-based WPCs can exhibit comparable mechanical performance to their petroleum-based counterparts, while being able to be made from industry byproducts. Compared to conventional WPCs, the biodegradable aspect of these bio-based composites is perceived as a significant environmental benefit because of reduced burdens associated with waste generation. Assessing aspects of environmental sustainability in relation to these materials is of great importance, as we aim to shift current design practices to reduce environmental impacts and provide the necessary insight to promote and encourage smarter, greener design. Further, these composites may be exposed to environmental conditions during use that may affect their durability. Models that incorporate deterioration of the materials are needed and an active are of research. This work examines the durability of bio-based WPC composites subjected to deteriorative environmental aging and accesses the environmental impacts associated with their production. It was found that their durability can greatly influence design decisions, when accounting for total member service life. Additionally, although bio-based WPCs have a potential to offer a wide range of ecological advantages, environmental impacts can still be high for these materials depending on how they are produced and manufactured. Having a better understanding of their durability and environmental impacts will shift traditional design practices and decisions to encourage a broader consideration of these materials, and ultimately further promote "green" engineering.

Comprehensive introduction to composites from natural and recycled biomaterialsCovers fabrication, mechanical analysis and modeling of green compositesNew ideas for cost-effective alternative matrices, fibers and additivesApplications to construction, automotive, and civil engineering An important contribution to the evolution of composites technology, this book is a systematic investigation of how natural biomaterials are used to create cost-effective and environmentally sound composites for commercial use. The book shows how a wide range of plant- and animal-based materials are integrated into the design and fabrication of matrices and reinforcements for polymeric and other types of composites. In addition, a focus is placed on modeling and mechanical analyses of biobased composites, providing valuable data on their performance. Sustainable composites are shown to be viable alternatives for manufactured components in automotive, civil engineering and construction applications.

Advances in Bio-Based Fibres: Moving Towards a Green Society describes many novel natural fibers, their specific synthesis and characterization methods, their environmental sustainability values, their compatibility with polymer composites, and a wide range of innovative commercial engineering applications. As bio-based fiber polymer composites possess excellent mechanical, electrical and thermal properties, along with highly sustainable properties, they are an important technology for manufacturers and materials scientists seeking to improve the sustainability of their industries. This cutting-edge book draws on the latest industry practice and academic research to provide advice on technologies with applications in industries, including packaging, automotive, aerospace, biomedical and structural engineering. Provides technical data on advanced material properties, including electrical and rheological Gives a comprehensive guide to appraising and applying this technology to improve sustainability, including lifecycle assessment and recyclability Includes advice on the latest modeling techniques for designing with these materials

Advanced High Strength Natural Fibre Composites in Construction provides the basic framework and knowledge required for the efficient and sustainable use of natural fiber composites as a structural and building material, along with information on the ongoing efforts to improve the efficiency of use and competitiveness of these composites. Areas of particular interest include understanding the nature and behavior of raw materials and their functional contributions to the advanced architectures of high strength composites (Part 1), discussing both traditional and novel manufacturing technologies for various advanced natural fiber construction materials (Part 2), examining the parameters and performance of the composites (Part 3), and finally commenting on the associated codes, standards, and sustainable development of advanced high strength natural fiber composites for construction. This exposition will be based on well understood environmental science as it applies to construction (Part 4). The book is aimed at academics, research scholars, and engineers, and will serve as a most valuable text or reference book that challenges undergraduate and postgraduate students to think beyond standard practices when designing and creating novel construction materials. - Presents the first comprehensive review on the efficient and sustainable use of natural fiber composites in construction and building materials - Contains detailed information on the structure, chemical composition, and physical and mechanical properties of natural fibers - Covers both traditional and novel manufacturing technologies for high strength natural fiber composites - Includes material parameters and performance in use, as well as associated codes, standards, and applied case studies - Presents contributions from leading international experts in the field