Journal of Applied Science and Engineering

Published by Tamkang University Press

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Sugiman Sugiman This email address is being protected from spambots. You need JavaScript enabled to view it.1, Paryanto Dwi Setyawan1, Buan Anshari2 

1 Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Mataram 83125, Indonesia
2 Department of Civil Engineering, Faculty of Engineering, University of Mataram, Mataram 83125, Indonesia


 

Received: September 27, 2019
Accepted: November 6, 2019
Download Citation: ||https://doi.org/10.6180/jase.202003_23(1).0002  


ABSTRACT


The paper presents the water absorption, swelling strain and the impact strength of alkali-treated bamboo fiber/polystyrene-modified unsaturated polyester (MUP) composites. The bamboo fibers were treated using alkali (sodium hydroxide) solution at the concentrations of 4, 8 and 12wt.% with the treatment times of 0.5, 1 and 2 hours under room (28oC) and elevated temperatures (50oC). The impact strength was investigated under dry and wet conditions. Under room temperature treatment, the equilibrium water uptake tended to decrease with the increase of alkali concentration; however, the diffusion rate did not indicate a clear trend. Meanwhile, the swelling strain tended to increase with the increase of alkali concentration. Under elevated temperature treatment, the water absorption of bamboo fiber/MUP composites further reduced, compared to that of under room temperature treatment at the same concentration. In dry condition, under both temperature treatments, the impact strength of the treated bamboo fiber/MUP composites was lower than that of the untreated bamboo fiber/MUP composites; however, the treatment under elevated temperature improved the impact strength, compared to that of under room temperature treatment. In wet condition, under both temperature treatments, the impact strength of the treated bamboo fiber/MUP composites improved and again the treatment under elevated temperature had the better improvement than the treatment under room temperature.


Keywords: Bamboo fiber, Alkali treatment, Elevated temperature, Water absorption, Impact strength



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