THE EFFECT OF POWDER VOLUME ON WATER ABSORPTION TIME IN CORN COB (CORN COB) PARTICLE WITH EPOXY MATRIX
DOI:
https://doi.org/10.36761/hexagon.v2i1.877Keywords:
Corn cobs particle composite, Powder volume, Eepoxy, Water absorptionAbstract
Corn cobs powder is natural waste used as reinforcement in particle board composites. Corn cobs waste is very abundant in Sumbawa Besar Regency, NTB. In general, corn cobs contain pure cellulose which can be an alternative filler because of its strong fiber (high modulus) properties. There are strong hydrogen bonds between the chains of cellulose, resulting in a crystalline structure. To determine the physical properties of corn cobs waste in its utilization. Therefore, corn cobs waste is used as a medium for particle board composite. Corn cobs powder uses a particle size of 70 Mesh with a volume variation of 30%, 40%, 50%, 60%, 70%. Composite production is done by hand lay up method with a mixture of epoxy resin and hardener using SNI 03-2105-2006 testing standards. The results obtained from the water absorption test show that the increasing the volume variation used in the composite, the higher the water absorption on the particle board and the longer the immersion time used, the higher the percentage obtained. While the results of the lowest weight percentage were the variation of the particle volume of 30% with a 24 hour duration of 1.4% and the highest percentage was the variation of 70% particle volume with a long soaking time of 72 hours of 14.2%. From the results of the research conducted showed that the composite corncob powder with epoxy resin at 30% volume variation was better than 70% volume variation.
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