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      Karakteristik Kayu Lapis Berbahan Vinir Kayu Karet (Hevea brasiliensis) Terfurfurilasi Berperekat Poliuretan dan Epoksi

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      Date
      2024
      Author
      Arrasuli, Muhammad Haikal
      Mubarok, Mahdi
      Lubis,, Muhammad Adly Rahandi
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      Abstract
      Penelitian ini menyelidiki karakteristik kayu lapis berbahan vinir kayu karet (Hevea brasiliensis) terfurfurilasi pada berbagai tingkat modifikasi. vinir kayu karet terlebih dahulu diimpregnasi dengan furfuril alkohol (FA) pada konsentrasi yang berbeda, yaitu 40%, 70%, dan 100%, dengan asam sitrat 3% sebagai katalis untuk polimerisasi FA pada suhu 103°C. Persen peningkatan berat (WPG), sifat mekanik dinamis (DMA), dan gugus fungsi vinir terfurfurilasi dianalisis. Vinir terfurfurilasi yang dihasilkan kemudian dibentuk kayu lapis dengan menggunakan poliuretan atau resin epoksi sebagai perekat. Beberapa sifat fisik, mekanik, dan morfologi kayu lapis furfurilasi dikarakterisasi. Furfurilasi sedikit menurunkan kekuatan ikatan kayu lapis berperekat PU pada FA 100%, sedangkan kayu lapis berperekat epoksi tetap tidak berubah untuk semua konsentrasi FA. Furfurilasi meningkatkan ketahanan kayu lapis terhadap delaminasi terutama pada perlakuan menggunakan FA 40% dan 100%. Pembentukan kayu lapis terfurfurilasi pada penelitian ini membuka peluang potensial penggunaan vinir berkualitas rendah dari jenis kayu cepat tumbuh untuk menggantikan vinir berkualitas tinggi dari hutan alam.
       
      This study investigated the properties of plywood made from furfurylated rubberwood (Hevea brasiliensis) veneer at different modification levels. Rubberwood veneers were impregnated with furfuryl alcohol (FA) at different concentrations of 40%, 70% and 100%, using 3% citric acid as a catalyst for FA polymerisation at 103°C. The percentage weight gain (WPG), dynamic mechanical properties (DMA) and functional groups of the furfurylated veneers were analysed. The resulting furfurylated veneer was then used to form three layers of plywood using polyurethane or epoxy resin as an adhesive. Several physical, mechanical and morphological properties of the furfurylated plywood were characterised. Furfurylation slightly decreased the bond strength of PU-bonded plywood at 100% FA, while epoxy-bonded plywood remained unchanged at all FA concentrations. Furfurylation improved the resistance of the plywood to delamination, particularly in the 40% and 100% FA treatments. The formation of furfurylated plywood in this study opens up potential opportunities for the use of low-quality veneers from fast growing wood species to replace high-quality veneers from natural forests.
       
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      http://repository.ipb.ac.id/handle/123456789/153674
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