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bioplasticsMAGAZINE_1402

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bioplasticsMAGAZINE_1402

People Basics By: Hanaa

People Basics By: Hanaa Dahy Staff member and doctoral researcher ITKE- (Institute for Building Structures and Structural Design) University of Stuttgart, Germany Natural fibres as flameretardants? Fibre Crops: e.g. Industrial Hemp, jute,…etc Regeneration: Retting, yarns and textile … Purposely grown to produce fibres Natural Fibres - Renewable Resources Agricultural Residues (Agro-fibres): e.g. Straw, husk,…etc Recycling: Chopping and grinding Minimizing of waste- Cost effectiveness – Environmental Aspects- Society Awareness Natural Fiber Source in Biocomposites and Agro-plastics Fig. 1: Non-wood natural fibre sources applicable in biocomposite manufacturing Fig. 2: Illustration of different architectural options for thermoformed green agroplastic panels Agro-fibres as a main component in biocomposites Throughout the past two decades natural fibres have been applied in many applications and industries including automotives, aircraft, paper industries, textiles as well as building and construction industries replacing, thanks to their lightweight and renewable nature, the non- renewable glass and other artificial fibres in the fibre-reinforced composites’ scope. Until now, the natural reinforced composites field is more than overwhelmed by industrial natural fibres, including wooden fibres above all, as well as jute, flax, cotton,…etc., while on the other hand natural fibres that are the result of the agricultural residues sector are still valued lowly and unfairly despite their huge advantages and potentials. Whereas the use of fibre crops planted specifically as a source of fibre is at least questionable from both social and environmental perspectives, the same cannot be said for agricultural residues. Agro-fibres, (i.e. agricultural plant residue fibres), can be applied as a main component in natural fibre composites, and in this case sometimes referred to as agro-plastics s (Fig. 1), and as seen here, suggested and applied. Cereal cultivation worldwide covers almost 700,000 hectares, according to the World Bank Group in 2013. Concerning production, maize comes in the first rank, then rice, then wheat according to FAO statistics in 2011. Rice and wheat straw represent accordingly the highest agro-fibre amounts worldwide. Green agroplastics from bioplastics and agro-fibres The advantages of applying pure bioplastics applications in the architectural field are clear when considering the freeform design options (Fig. 2), the safe indoor air quality with no VOC (Volatile Organic Compounds) emissions, and the safer end-of-life disposal options. Therefore, it would be a successful option to combine the advantages of the agrofibres generated from agricultural residues, together with the advantages of bioplastics and applying both to produce architectural green biocomposite products. 18 bioplastics MAGAZINE [02/14] Vol. 9

Basics Biocomposites’ Groups Cellulose-Lignin (Reference-1) The initial post-ignition time was >10sec, but less than 30sec. The time after the second ignition was

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