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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu dan Teknologi Hasil Hutan Sains Natural: Journal of Biology and Chemistry Jurnal Pengelolaan Laboratorium Pendidikan Jurnal Ilmu dan Teknologi Kayu Tropis Journal of Sylva Indonesiana ULIN: Jurnal Hutan Tropis International Journal of Recent Technology and Applied Science (IJORTAS) Journal of Engineering, Technology, and Applied Science (JETAS) Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society Indonesian Journal of Laboratory Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari Jurnal Ilmu Kehutanan Jurnal Ilmu Kehutanan
Istie Rahayu
Department Of Forest Products, Faculty Of Forestry, Bogor Agricultural University (IPB), Bogor (16680)
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences

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The Effect of Synthetic and Commercial Nano-Magnetite on the Electromagnetic Absorbance Behavior of Magnetic Wood Rahayu, Istie Sekartining; Sabarna, Aqila Alya Nabila; Wahyuningtyas, Irma; Ismail, Rohmat; Prihatini, Esti; Darmawan, Wayan; Laksono, Gilang Dwi; Alipraja, Irsan
Jurnal Sylva Lestari Vol. 12 No. 2 (2024): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i2.889

Abstract

Magnetic wood with good electromagnetic wave absorption properties was prepared by comparing synthetic and commercial nano-magnetite (Fe3O4-NP) as sengon (Falcataria moluccana) wood impregnation solution. The co-precipitation method produced a synthetic nano-magnetite with NH4OH as a weak base precursor. Meanwhile, the commercial one was purchased from a supplier. Three levels of nano-magnetite concentration (1%, 2.5%, and 5%) were dispersed in deionized water. The impregnation process was done by applying a vacuum of 0.5 bar for 120 minutes, followed by a pressure of 1 bar for 120 minutes. The results showed that the commercial nano-magnetite caused more improvements in weight percent gain, density, and hardness than the synthetic nano-magnetic, although they were insignificantly different. There was also a reduction in brightness with the overall color change being categorized into other colors because the color became darker with increasing nano-magnetite concentration in both woods. The absorbance capacity of the synthetic nano-magnetite-treated wood was larger than the commercial nano-magnetite-treated wood. This synthetic nano-magnetite-treated wood had been optimally treated at a 5% concentration, making it suitable for use as electromagnetic wave shielding material because it can absorb almost 100% electromagnetic waves. Keywords: Fe3O4, impregnation, nano-magnetite, sengon wood, shielding materials
Enhancing Dimensional Stability of Sengon Wood through Synergistic Citric Acid-Glycerol Cross-Linking and SiO2/TiO2 Nanocomposite Impregnation Sartika; Istie Sekartining Rahayu; Wayan Darmawan; Andi Detti Yunianti; Esti Prihatini; Gilang Dwi Laksono; Rohmat Ismail
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1372

Abstract

Sengon wood (Falcataria moluccana) is a fast-growing, low-quality species. In this research, nanoparticle-based impregnation was used to improve the quality and characteristics of sengon wood. SiO2 nanoparticles derived from bamboo leaves were synthesized using the sol-gel method, while TiO2 nanoparticles and SiO2/TiO2 nanocomposites were synthesized using the hydrothermal method. A mixture of citric acid, glycerol, and nanoparticles (SiO2, TiO2, and SiO2/TiO2 composite) was formulated as an impregnation solution at 1% concentration. Sengon wood impregnation was conducted using a vacuum-pressure method. The physical properties tested included weight percent gain (WPG), bulking effect (BE), anti-swelling efficiency (ASE), water uptake (WU), and density. The size of the synthesized nanoparticles was analyzed using a particle size analyzer (PSA). The impregnated sengon wood was characterized using Fourier transform infrared spectroscopy (FTIR) to identify functional groups and X-ray diffraction (XRD) to determine the degree of crystallinity. PSA analysis showed that the material used in the impregnation process is nanoscale (< 100 nm) and exhibits the best dispersion stability in the SiO2/TiO2 nanocomposite. Nanoparticle-impregnated sengon wood exhibited reduced WU and improved dimensional stability compared to untreated samples, especially in citric acid-glycerol and composite nanoparticle treatments. FTIR analysis identified the formation of ester bonds and the reduction of hydroxyl groups, and XRD analysis showed a decrease in crystallinity upon impregnation with nanoparticles and a citric acid-glycerol mixture. Overall, the use of citric acid-glycerol with the nanocomposite showed effectiveness in improving the dimensional stability and physical properties of sengon wood. Keywords: citric acid-glycerol, dimensional stability, sengon, SiO2/TiO2 nanocomposite, wood modification
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Salam Min Rohmatillah Akhrudin Maddu Alifah Fidela Alifah Syahfitri Andi Detti Yunianti Arinana Arinana Deded Sarip Nawawi Dodi Nandika Dwi Laksono, Gilang Esti Prihatin Esti Prihatini Esti Prihatini Esti Prihatini Esti Prihatini Gilang Dwi Laksono Gilang Dwi Laksono I Ketut Nuridja Pandit I Nyoman Jaya Wistara I Wayan Darmawan Ina RITA Irma Wahyuningtyas Irsan ALIPRAJA Ismail, Rohmat Khairunissa, Dhiya Khoerudin, Riki Laksono, Gilang Dwi Lina Karlinasari Mersi Kurniati Muflihati Muflihati Muslimatul Rahmi Naresworo Nugroho Pipin Supinah Prihatini, Esti Remy Marchal Riadhi, Mohamad Rizki Rita Kartika Sari Rizky Ramdhani Rohmat Ismail Rohmat Ismail Rynaldo Davinsy Sabarna, Aqila Alya Nabila Saputri, Egy Dia Saputri, Egydia Sartika Satriyo H Wicaksono Saviska Luqyana Fadia Trisna PRIADI Vera Junita Sitanggang Wahyuningtyas, Irma Wasrin Syafii Wayan Darmawan Widyana LUZA Yoki Putra YOLANDA Zahrial COTO