Water absorption, tensile, flexural and impact properties of aged bamboo fibre/nano CaCO3-modified unsaturated polyester composites

Sugiman Sugiman; Paryanto Dwi Setyawan; Maryudi  Maryudi; Sutikno  Madnasri

doi:10.6180/jase.202104_24(2).0013

Water absorption, tensile, flexural and impact properties of aged bamboo fibre/nano CaCO3-modified unsaturated polyester composites

Sugiman Sugiman This email address is being protected from spambots. You need JavaScript enabled to view it.¹ , Paryanto Dwi Setyawan¹ , Maryudi Maryudi² , and Sutikno Madnasri³

¹Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Mataram, Nusa Tenggara Barat, Indonesia.
²Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Ahmad Dahlan, Yogyakarta, Indonesia.
³Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Semarang, Indonesia.

Received: August 26, 2020
Accepted: November 19, 2020
Publication Date: April 1, 2021

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202104_24(2).0013

ABSTRACT

This paper presents the investigation on the effects of nano CaCO₃ on the durability of bamboo fibres/unsaturated polyester composites aged in distilled water up to 112 days. The nano CaCO₃ contents in the unsaturated polyester matrix were 0, 1, 3 and 5 wt%, while the bamboo fibre content in the bamboo fibre/nano CaCO₃-modified unsaturated polyester composites was fixed by 25 vol%. It was found that the equilibrium water uptake and diffusion rate decreased up to 16.2 and 15.6 %, respectively, by adding nano CaCO₃ up to 3 wt%; however, at the content of 5 wt%, they were higher than those of the unfilled composites. For the unaged composites, the tensile and flexural strengths were improved by adding nano CaCO₃ up to 1 and 3 wt%, respectively, whereas adding 5 wt% could not give positive effects. On the other hand, the increase of nano CaCO₃ up to 5 wt% increased the elastic modulus almost linearly for both loadings. For the aged composites, adding 1-5 wt% nano CaCO₃ reduced the degradation of composites both in tensile and flexural loadings, but the best enhancement was obtained at the content range of 1-3 wt%. Under impact loading, adding 1-5 wt% nano CaCO₃ enhanced the impact strength of composites, regardless of the ageing condition.

Keywords: bamboo fibre, unsaturated polyester, nano CaCO3, durability, composites

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