Abstract
The potential usage of virgin Low density polyethelyne (LDPE) reinforced with different concentrations (2%, 5% and 6% by weight) of treated rice straw with different lengths (2 mm, 4 mm and 6 mm) is investigated to produce high value products that have technical and environmental demand. The two treatment methods used for rice straw are alkali and acidic treatments of rice straw. The removal of impurities and waxy substances from fiber surface avoid creation of rougher topography after treatment and improves the quality of fiber, also content of hemi cellulose and lignin decrease so increase effectiveness of fiber due to dispersing of fiber in matrix. The reinforcing material is embedded in the matrix material to enhance tensile and flexural behaviors of the synthesized composite. The result of investigating these two mechanical properties, using statistical analysis & design of experiments, showed an enhancement in the mechaniccal properties of the virgin polymer composite compared to the virgin polymer. The flexural stress of the composite increased three times the virgin flexural stress, while the tensile stress increased eight times the original tensile stress.
Highlights
Research interest has been shifting from monolithic materials to fiber reinforced polymeric materials
The objective of this paper is to investigate the potential usage of virgin polymer with rice straw as a reinforcing element to produce high value products that has technical, economical and environmental, using a simple and effective technology
Three samples for each treatment condition were tested in accordance with ASTM D 790-03 to determine the flexural stress of Fiber Reinforced Plastic (FRP) of 2% and 5% rice straw of length 2 mm treated with sodium hydroxide alkali
Summary
Research interest has been shifting from monolithic materials to fiber reinforced polymeric materials. The natural fiber reinforced composite have low maintenance requirements, high stress to weight ratio, high corrosion, impact resistance, non conductive, avoid electrical hazards, reduced cost, easy installation due to light weight and fire retardant. The middle layer consists of a series of helically wound cellular micro fibrils made of long chain cellulose molecules [2]. These rice straw fibers are treated by soaking in an acidic and alkali solution before used in the composite. It has a low static charge so it does not attract dust and dirt
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