TY  - EJOU
AU  - Attallah, Marwah Subhi 
AU  - Mohammed, Reem Alaa 
AU  - Abdel-Rahim, Ruaa Haitham 

TI  - Characterization of Unsaturated Polyester Filled with Waste Coconut Shells, Walnut Shells, and Carbon Fibers
T2  - Fluid Dynamics \& Materials Processing

PY  - 2023
VL  - 19
IS  - 10
SN  - 1555-2578

AB  - This study aims to evaluate the erosion behavior and the hardness of hybrid composites made of varying amounts of coconut shells, walnut shells, and carbon fibers dispersed in a polyester matrix. MINITAB (L16) Taguchi experiments were used to determine the optimal combination of parameters. In particular, an erosion device consisting of a motor with a constant flow rate of 45 L/min, a pump with a diameter of 40 mm, a nozzle with a diameter of 5 mm, and a tank made of “perspex glass” 55 cm long, 30 cm tall, and 25 cm wide was used. The tests were conducted by varying the sample-to-nozzle distance, the pattern angle, and the sand particle size. The results have revealed that the presence of 7.5% by weight of waste coconut shell, for conditions corresponding to 90° angle, sand size 425 μm, stand distance 30 cm, gives the best wear resistance (3.04 × 10<sup>−5</sup> g/g). The filler content and sand particle size affect the erosive rate, with the angle playing a secondary role. The distance between the sample and the nozzle has a weaker effect on erosive wear. The hardness results show that the models (UP-5% carbon fiber-2.5-3.5-4.5-5.5-6.5-7.5 wt.% waste coconut shell) give the best values for prayer compared to the samples (UP-5 wt.% carbon fiber-2.5-3.5-4.5-5.5-6.5-7.5 wt.% waste walnut shell).
KW  - Unsaturated polyester resin; carbon fiber; waste coconut shell; walnut shell; erosive behavior; Taguchi’s method L16

DO  - 10.32604/fdmp.2023.027750