دانلود رایگان مقاله خواص فیزیکی و مکانیکی الیاف لیف درخت کامپوزیت پلیمری

Abstract

In the last two decades, the fibre reinforced composites have attracted substantial importance as a potential structural material for residential housing construction and is largely found in nonstructural housing components. Research and development efforts are being made to use bast fibres (comes under the classification of plant fibres) as reinforcement for the automotive and building industries. Bast fibres, a relatively new group of environmental friendly materials are in considerable demand in recent years by unifying technological, economical and ecological aspects. Bast fibres are receiving increasing attention as reinforcement in polymeric materials in composites due to the shortage and environmental hazardous of non-renewable resources. The use of bast fibres offer a number of advantages, since they are derived from a renewable resource, require low energy inputs in their manufacture, and can be disposed of at the end of their life-cycle by composting. Further the bast fibre reinforced polymer composites is of low density and cost as well as having satisfactory mechanical properties. The aim of this paper is to provide a consolidated report of the researches in the field of different bast fibres (banana, flax, hemp, jute, kenaf and ramie) reinforced polymer composite including the effect of chemical treatment with its physico-mechanical properties and their applications.

6. Conclusion

The present review explored the works related to bast fibre reinforced polymer composites. The physico-mechanical properties of bast fibre reinforced polymer composites such as hardness, tensile, flexural and impact properties and the effects of chemical treatments to improve the interfacial matrix–fibre bonding resulting in the enhancement of physical properties of the fibre polymer composites were also reviewed. In order to replace conventional materials, material scientists have concentrated their attention on using bast fibres that weigh less, durable, efficient and have high mechanical properties. Some of the restrictions of bast fibre reinforced composites are inferior fire resistance, lower durability, problem of storing raw material for extended time due to possibility of degradation, lack of uniformity of properties due to climatic conditions when cultivated, biological attack of fungi and mildew, limited its applications. Also bast fibre contains high hydroxyl content of cellulose that makes it liable to higher water absorption that affects the materials’ mechanical properties. To overcome these problems, suitable chemical treatment can be given into the bast fibre. Hence, it can be concluded that the bast fibres have better physical properties that make it as a suitable material to replace conventional materials as reinforcement in the existing composite world. As a major source of indigenous raw material in polymer industry not only provides a biodegradable resource, but also provides a chance for economic development in rural areas. In general, bast fibre reinforced polymer composites have bright future because of their light in weight, affordable cost and decomposable in nature, and demand in alternatives to glass fibre composites. As there is a continuous rise in the environmental temperature, weather casting becomes a necessary one for the buildings, for which the present usage of materials are not ecofriendly. In this juncture, the preparation and usage of environmental friendly composite materials can make a revolution in the field of Civil Engineering. Thus, the composites stand the most wanted technology in the fast growing current trend.