Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Natural fiber

Effect of Different Fiber Reinforcements on Some Properties of Prosthetic Socket

Noor K. Faheed; Jawad K. Oleiwi; Qahtan A. Hamad

Engineering and Technology Journal, 2021, Volume 39, Issue 11, Pages 1715-1726
DOI: 10.30684/etj.v39i11.2267

In the perspective of environmental advance, significant attentiveness is being displayed in the usage of natural fibers like reinforcement in polymer composites. This paper focuses on building a prosthetic socket arranged from natural fiber-reinforced composite as an effort to substitute material currently accessible in the manufacturing of the socket. The vacuum bagging procedure was adopted to yield a below-knee socket. The laminates encompass woven flax, sisal, cotton, carbon, person, and glass fabric. The impact of diverse fiber layering sequences on some of the physical and mechanical characteristics was assessed. Laminated specimens were characterized by tests such as (hardness, surface roughness, density, water absorption). The results of this study showed that consuming altered forms of reinforcing materials had an abundant influence on the properties of prepared composite and the values of (hardness, surface roughness, and density) properties improved with increasing of the volume fraction of materials and the best composite specimens were three layers of flax with two layers of carbon fiber, were the hardness property ranges 86 MPa and density of (1.276 gm. /cm3) due to their exceptional mechanical properties. The results of the present study advocate that the arrangement of natural and synthetic reinforcements allows the preparation of bio-composites with enhanced performance.

Synthesis and Characteristics of Acetylated Corn Cob Powder/ Unsaturated Polyester Composite

Assala M. Oribe; Kadhum M. Shabbeb; Ayad K. Hassan

Engineering and Technology Journal, 2020, Volume 38, Issue 7, Pages 1084-1095
DOI: 10.30684/etj.v38i7A.704

In this research, the composite material was prepared from untreated and treated corn cob powder by acetylation process and the physical and mechanical properties have been studied. Cellulose is extracted using the Kürchner-Hoffer method and then acetylated. Untreated corn cob powder and Acetylated corn cob powder were mixed with unsaturated polyester resin in different concentrations (0, 1, 2, and 3 wt. %). The Mechanical and the physical test results showed that there is an enhanced in mechanical properties (Tensile, Impact, Hardness, and Bending) with the treatment (Acetylation) by increasing treated corn cob powder mass fraction (1, 2, and 3wt. %) respectively.

Dielectric and Thermal Properties of Carrot Fibers –Epoxy Composites

Wafaa A. Hussain

Engineering and Technology Journal, 2011, Volume 29, Issue 16, Pages 3359-3367

Epoxy composites were prepared with two sizes of carrot fibers in different weight percent (10%, 20%, 30% and 40%) by hand lay-up technique. The dielectric constant and dissipation factor (tanä) of pure epoxy resin and composites were measured in a frequency range of 50 Hz to 5 MHz with increase fibers content, dielectric strength
(breakdown voltage) and thermal conductivity were evaluated as a function of fiber content. The dielectric constant and dissipation factor values were found to be higher for fiber reinforced system than the pure epoxy. The dielectric strength values decreases and the values of thermal conductivity increases with fibers content.