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All Journal Jurnal Fisika FLUX EnviroScienteae
Suryajaya Suryajaya
Program Studi fisika FMIPA Universitas Lambung Mangkurat
Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Physics

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STUDI AWAL PEMILIHAN BAHAN KOMPOSIT BERBAHAN PENGUAT SERAT DAUN NANAS (PINEAPPLE–LEAF FIBRES) DENGAN ADMIXTURE KAOLIN DAN SILIKA Tetti Novalina Manik; Suryajaya Suryajaya; Eka Suarso
Jurnal Fisika FLUX Vol 11, No 2 (2014): Jurnal Fisika FLUX Edisi Agustus 2014
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (73.592 KB) | DOI: 10.20527/flux.v11i2.2726

Abstract

Abstrak: Penelitian studi awal pemilihan bahan komposit berbahan penguat serat daun nanas (pineapple-leaf fibres) dengan admixture Kaolin dan Silika telah dilakukan. Penelitian ini bertujuan untuk mengetahui komposisi matriks, serat dan bahan tambahan (admiture) yang paling baik yang digunakan sebagai papan komposit ditinjau dari sifat mekanik dan mikroskopiknya. Sifat mekanik dan mikroskopik ini juga dilihat dari orientasi susunan serat, yakni serat arah vertikal, vertikal horizontal, serat pendek dan disusun acak dan variasi jumlah massa serat. Berdasarkan hasil uji MOR dan MOE, komposisi matriks dan penguat yaitu resin epoxy dan serat nanas adalah 2,6 gr : 55 gr dengan susunan vertikal yaitu dengan nilai uji tekan (MOR) sebesar 569,49 kg/cm2 dan uji tarik (MOE) sebesar 43.407,91 kg/cm2. Penambahan bahan admixture silika dan kaolin pada bahan komposit tidak mempengaruhi atau memperbaiki sifat mekanik dari papan komposit serat nanas, bahkan melemahkan, demikian juga dengan ukuran serat pendek dan jika disusun acak. Berdasarkan uji mikroskopik, papan komposit yang dibuat telah menujukkan homogenitas antara serat, resin dan bahan admixture yaitu kaolin dan silikaKata Kunci : serat daun nanas, komposit, admixture, MOR, MOE
Sintesis Dan Karakterisasi Urea-Hidroksiapatit Dengan Variasi Ca(OH)2 Sebagai Kandidat Pupuk Lepas Lambat Syahiful Hadi; Suryajaya Suryajaya; Abdullah Abdullah; Kissinger Kissinger
EnviroScienteae Vol 15, No 1 (2019): EnviroScienteae Volume 15 Nomor 1, April 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1031.172 KB) | DOI: 10.20527/es.v15i1.6331

Abstract

Urea-hydroxyapatite can be used as fertilizer which was efficient and environmentally friendly. The variation of Ca(OH)2 in the urea-hydroxyapatite’s synthesis and its characterization would provide information for manufacturing slow release fertilizer. The material used were urea (99.5 %); Ca(OH)2; H3PO4 0.67 M and distilled water. The synthesis technique used in this study is bottom-up with Ca(OH)2 variation of 6, 8, 10 and 12 grams. The results of the synthesis with 6 grams of Ca(OH)2  was not able to produce sediment powder. The results of the Scanning Electron Microscopy (SEM) showed that the urea packaging with hydroxyapatite was better for variations of Ca(OH)2  8 grams and 10 grams. The results of the Energy Dispersive X-Ray Spectrometry (EDX) showed more elemental composition in the variation of Ca(OH)2  8 grams and 10 grams which were 35.7 Wt% and 40.4 Wt%. The results of the Fourier Transform Infrared Spectrometer (FTIR) showed that the variation of Ca(OH)2  8 gram has a good bonding of urea and hydroxyapatite. The Particle Size Analyzer (PSA) measurement for all samples of urea-hydroxyapatite yielded the particle size of about 0.5–2.5 mm and 10–15 mm for urea and hydroxyapatite, respectively. As a conclusion, the variation of Ca(OH)2  8 grams could be recommended as a reference in the composition of urea-hydroxyapatite fabrication for slow release fertilizer.
Co-Authors Abdullah Abdullah Kissinger Kissinger Suarso, Eka Syahiful Hadi Tetti Novalina Manik