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Degradation Characteristics of SPF/SPS Biocomposites

Sahari J, Sapuan S. M., Zainudin E S, Maleque M. A.

Fibres & Textiles in Eastern Europe

2014

Vol. 22, no. 5 (107)

96—98

In this work, sugar palm fibres (SPF) were used as a biodegradable reinforcement. SPF were incorporated into sugar palm starch (SPS) plasticised with glycerol using the compression molding process. Then the SPS and SPF/SPS biocomposites were submitted to biodegradation by means of soil burial experiments. The environmental effect on the SPS and SPF/SPS biocomposites were a loss in tensile strength of 78.09% and 53.67%, respectively, at the end of 72 hrs of the weathering testing period. The biodegradation test shows that SPS degrades very quickly and loses 63.58% of its weight at the end of 72 hrs compared to the SPF/SPS biocomposites.

Dla otrzymania biokompozytów zastosowano włókna z palmy cukrowej jako biodegradowalne wzmocnienie oraz matrycę ze skrobi tejże palmy. Plastyfikację przeprowadzono wykorzystując glicerynę w procesie wytłaczania. Gotowe biokompozyty były poddane biodegradacji przez umieszczenie w odpowiedniej glebie. Po 72 godzinach stwierdzono ubytek masy rzędu 78% podczas gdy w warunkach atmosferycznych stwierdzono ubytek masy około 54%. Stwierdzono również, że sama skrobia degraduje bardzo szybko i traci około 63% masy pod koniec 72- godzinnego okresu starzenia w warunkach atmosferycznych.

Dufour and soret effects on steady free convection and mass transfer flow past a semi-infinite vertical porous plate in a porous medium

Alam M. S., Ferdows M., Ota M., Maleque M. A.

International Journal of Applied Mechanics and Engineering

2006

Vol. 11, no 3

535-545

Steady two-dimensional free convection and mass transfer flow past a continuously moving semi-infinite vertical porous plate in a porous medium is studied theoretically, by taking into account the Dufour and Soret effects. The similarity equations of the problem considered are obtained by using usual similarity technique. The resulting equations are then solved numerically by shooting method using Runge-Kutta sixth-order integration scheme. The non-dimensional velocity, temperature and concentration profiles are displayed graphically for different values of the parameters entering into the problem. In addition, the skin-friction coefficient, the Nusselt number and Sherwood number are shown in tabular form.