Pengaruh Panjang Serat Terhadap Sifat Bending Komposit Poliester Berpenguat Serat Agave Cantula
DOI:
https://doi.org/10.29407/jmn.v3i2.15335Keywords:
Alkali, Agave Cantula, Bending, Komposit Poliester, Panjang SeratAbstract
Penggunaan serat alam sebagai bahan penguat dalam bidang rekayasa material komposit polimer semakin diminati oleh peneliti dan juga oleh praktisi dunia industri. Hal ini disebakan karena serat alam tidak mencemari lingkungan dan mudah didaur ulang, sedangkan limbah serat sintesis sebaliknya mencemari lingkungan. Penelitian ini bertujuan untuk mengetahui pengaruh panjang serat agave cantula terhadap sifat bending komposite polyester. Bahan yang digunakan dalam penelitian ini adalah serat agave cantula, matrik poliester dan NaOH. Serat diperoleh dari batang daun agave cantula yang diserut menggunakan pisau. Sebelum serat digunakan sebagai penguat pada penelitian ini, terlebih dahulu serat diberi perlakuan perendaman dalam larutan alkali dengan konsentrasi larutan sebesar 2% selama 4 jam. Setelah perendaman, serat dicuci dengan air bersih untuk menghilangkan NaOH dari serat. Panjang serat yang digunakan adalah 2cm, 4cm dan 6cm. Komposisi campuran serat dan matrik didasarkan pada aturan Rule of Mixture (RoM), dengan fraksi volume serat sebesar 30%. Komposit dicetak dengan metode hand ly up diikuti penekanan selama 24 jam, sedangkan specimen uji bending dibuat sesuai standar ASTM D790 dan diuji dengan alat uji UTM. Hasil pengujian bending menunjukan bahwa komposit yang diperkuat oleh serat yang diberi perlakuan alkali memiliki kekuatan bending yang lebih tinggi dibandingkan dengan komposit berpenguat serat tanpa perlakuan alkali. Komposit dengan panjang 6 cm memiliki nilai tegangan bending yang lebih tinggi dibandingkan dengan pajang 2 cm dan 4 cm.
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