Papers by Keyword: Coconut

Abstract: Vietnam is one of the agricultural coconut exporting countries in the world. Therefore, by-products from coconut were discharged into the environment a lot. Using coconut as activated carbon is one of the ways to increase the value of coconut products. In addition, activated carbon from coconut can handle pollutants from the environment. In this study, activated carbon from coconut was synthesized by microwave-assisted method to treat the antibiotic Ciprofloxacin. The physicochemical properties of activated carbon were analyzed using FTIR, XRD, and BET methods. The semi-morphic structure and functional groups have shown structural characteristics. The factors affecting the adsorption process, such as pH, concentration, and dosage, were also evaluated. Fixed parameters include time 20 min and temperature 30 °C. The adsorption process was also evaluated with kinetic and isothermal models of adsorption. The kinetic and isothermal models suitable for the material were Pseudo-first-order and Langmuir. The influencing parameters would be optimized by the RSM model. Optimal parameters are pH 3.97, concentration 85.67 mg.L^-1, content 0.51 g.L^-1. From the optimal parameters, the adsorption capacity and treatment efficiency were also predicted to be 73.75 mg.g^-1 and 42.6%. This helps the process of treatment and adsorption of pollutants to achieve the highest efficiency.

Abstract: This study explored coconut shells in developing Al-Cu-Mg based nanocomposites for fabricating mould parts. The aim is to engineer alternate way through which income can be generated from agricultural wastes and recycling of industrial waste like aluminium cans. Al-Cu-Mg based nanocomposites were produced and characterised. Effects of carbonised and uncarbonised coconut shell nanoparticle (UCSNP) additions on properties of Al-Cu-Mg nanocomposites were compared. Maximum tensile strength was obtained at 10%vol uncarbonised coconut shell nanoparticle additions to Al-Cu-Mg. Increase in tensile strength and elastic modulus were noted with carbonised coconut shell reinforced Al-Cu-Mg nanocomposites against the decrease in the elastic (Young’s) modulus of the UCSNP/Al-Cu-Mg nanocomposites. Despite highest tensile strength of 10%volUCSNP/Al-Cu-Mg, 10%volCCSNP/Al-Cu-Mg nanocomposite is ranked as the best material in this study due to its optimum combination of properties including tensile strength, elastic modulus, tensile strain, impact energy and hardness values. Hence, it has been selected for fabricating open die mould parts to be used in compression sheet forming process for fabricating polymeric standard samples for tensile flexural analyses. Keywords: Al-Cu-Mg, Coconut, Shell, Nanoparticles, Mould fabrication

Abstract: The automotive brake disc is a device for slowing or stopping the motion of a wheel while it runs at a certain speed. The widely used brake disc material is cast iron which consumes much fuel due to its high specific gravity. To reduce automobile weight and improve fuel efficiency, the automotive industry has increased the use of aluminium in light vehicles in recent years. The aim of this paper is to develop new natural fibre reinforced aluminium composite for automotive brake disc.Different laboratory formulations were prepared with varying coconut fibre, friction modifiers, abrasive material and solid lubrificant using powder mettallurgy techique for the developement of new natural fibre reinforce aluminiu composites. The analysis led that natural coconut fibre is a potential candidate fiber or filler material for the automotive brake disc.

Abstract: Abstract: The coconut is a one of the main economic crops in the tropical region of China, and is also a selling one in summer in Hainan.But the way to punch or suck the coconut juice is still a manual work and has more than one process at present. Therefore, we studied and designed a machinery which is based on hydraulic control system, and can finish the work of clamping coconut, punching sucking juice together. It has simple structure,costs low, easy to assemble and efficiency as well.

Abstract: In order to understand the basic definition of the natural material, references of recently published articles were studied. From these articles, the definition of different terms like renewable material, recyclable material, biodegradable material, sustainable material and finally natural material were collected. Furthermore, a classification of natural fibre was drawn. One of these natural fibres - the coconut was chosen for a more detail analysis in mechanical point of view. An integrated method to analyse the sustainability of the coconut fibre as one of the blend components in building construction will be suggested. Finally, several uses of the fibre are reviewed.

Abstract: Known as “coir”, the fibrous husk of the coconut fruit has potential for integration as a constituent in impact-resisting aerospace materials. As a preliminary study, kinetic energy absorption of this natural fiber is studied prior to further testing, for instance; a non-ballistic surface impacted at high velocity by a small mass is the equivalent mock-up to runway debris. The purpose of this study is to find the relationship between the thickness of the fiber with the kinetic energy absorption. Fabricated fiber panels measuring 10×10×t cm with various thickness are subjected to mild steel projectiles launched by a light gas gun at a constant pressure. The velocity of the projectiles is set to be consistent with the velocity range of typical transport-category aircraft. The impact response of the panels aids in predicting the required amendments where plies of coir sheets are increased to which perforation is impossible. The relationship established from the experimental results is then used to predict the amount of layers required for total translational kinetic energy absorption.