Pengaruh Fraksi Volume Serat Kulit Jagung terhadap Kekuatan Tarik dan Penyerapan Air Komposit Polyurethane
DOI:
https://doi.org/10.22441/jtm.v7i1.2268Keywords:
Composite, Corn Skin, Fibre Fraction, Tensile Strength, Water Absorption.Abstract
Sejumlah peneliti telah meneliti sifat mekanik komposit yang diperkuat serat kulit jagung. Namun kombinasi kekuatan tarik dan sifat penyerapan air komposit berpenguat serat kulit jagung masih memerlukan penelitan lebih lanjut berkaitan penggunaan komposit pada lingkungan basah. Tujuan dari penelitian ini adalah menentukan pengaruh fraksi volume serat kulit jagung terhadap kekuatan tarik dan sifat serapan airnya. Material utama yang dipakai adalah polyurethane sebagai martik dan kuli jagung sebagai serat. Pengujian dilakukan dengan mencampurkan matriks dan serat menjadi sepsimen komposit. kekuatan tarik sepsimen diuji dan daya serap air spesimen duji, untuk kekuatan tarik menggunakan menggunakan alat tensilon dengan standar ASTM D 3039. Hasilnya semakin besar fraksi volume serat sepesimen semakin besar pula kekuatan tariknya. Seangkan untuk sifat penyerapan airnya, persentase penyerapan air dari komposit dipengaruhi oleh pengembangan polyurethane saat dibentuk jadi specimen.
Abstract -- Some researchers have observed the mechanical characteristics of composite with strengthening by corn skin fibre reinforcement. However the combination of strength stress and water absorption of composite with corn skin fibres needs more exploration due to wide of its application particularly in the wet environment. The objective of this study is to determine the effect of fraction of the composite fibre to the tensile strength and moisture absorption. The main materials of this research are polyurethane as matrix and corn skin fibre as reinforcement. The research was done by mixing matrix and fibre at the certain volume fraction to produce the composite specimens. Specimens were tested by tensile test with ASTM D 3039 and water absorption test. The results shown that the higher fraction of the fibre, the increase the tensile strength. While for the water absorption, the absorption behaviour is affected by the expansion of polyurethane during producing the specimens.
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