Ihak Sumardi
School Of Life Sciences And Technology, Institut Teknologi Bandung

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Effect of Board Type on Some Properties of Bamboo Strandboard Ihak Sumardi; Shigehiko Suzuki; Noor Rahmawati
Journal of Mathematical and Fundamental Sciences Vol. 47 No. 1 (2015)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2015.47.1.4

Abstract

The objective of this study was to evaluate the properties of bamboo strandboard (OSB) by comparing different board types and strand-lengths. Bamboo  strandboards with nominal dimensions of 37 mm by 37 mm by 12 mm and target density 0.65 g/cm3 were manufactured using moso bamboo (Pyllostachys pubescent Mezel) and MDI resin to produce two types of strandlength. Two types of strand length and MDI resin were used to produce three types of strandboard. The bending properties and dimensional stability of the strandboards were evaluated according to the Japanese Industrial Standard (JIS) for particleboard. The results of this experiment indicate that the bending properties and internal bond strength were affected by both board type and strand-length. The distribution of resin inside the 80 mm strandboard was less homogenous than in the 50 mm strandboard, which affects the internal bond strength. Thickness swelling of the RAND board was the highest and linear stability was affected substantially by strand alignment. The RAND board and cross-oriented 3LAY board effectively restrained linear expansion in the direction perpendicular to the strand alignment. A cross-oriented core may be the most effective way to reduce dimensional change and bending property values in perpendicular directions.
Ketahanan Oriented Strand Board Bambu Betung dengan Perlakuan Steam pada Strand terhadap Cuaca (Durability of Oriented Strand Board Prepared from Steam -treated Betung Bamboo to Natural Weathering) Sena Maulana; Muhammad QA Damanik; Marwanto Marwanto; Muhammad I Maulana; Adesna Fatrawana; Ihak Sumardi; Nyoman J Wistara; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (311.296 KB) | DOI: 10.51850/jitkt.v17i1.459

Abstract

Penelitian ini bertujuan untuk mengevaluasi ketahanan oriented strand board (OSB) dari bambu betung (Dendrocalamus asper) (BOSB) dengan perlakuan steam pada strand terhadap cuaca. Strand diberi perlakuan steam pada suhu 126 ºC di bawah tekanan 0,14 MPa selama 1 jam. Tiga lapis BOSB dibuat dengan kerapatan target 0,7 g cm-3 yang direkat dengan perekat fenol formaldehida (PF) dengan konsentrasi 8%. Parafin ditambahkan sebanyak 1% dari berat kering oven strand. Bamboo oriented strand board dipaparkan pada cuaca terbuka di Dramaga, Kabupaten Bogor Jawa Barat (6°34’15.72’’Selatan 106°44’17.30’’Timur). Evaluasi sifat fisis dan mekanis BOSB sebelum dan sesudah dipaparkan di udara selama 2 dan 3 bulan dilakukan berdasarkan standar JIS A 5908:2003. Penentuan nilai nisbah retensi MOE dan MOR dilakukan dengan membandingkan nilai MOE dan MOR sebelum dan sesudah pemaparan. Hasil penelitian menunjukkan bahwa perlakuan steam pada strand dapat meningkatkan stabilitas dimensi dan sifat mekanis BOSB. Pemaparan BOSB pada cuaca terbuka dapat menurunkan stabilitas dimensi dan kekuatan BOSB. Ketahanan BOSB dengan perlakuan steam pada strand terhadap pemaparan alami lebih tinggi dibandingkan dengan tanpa perlakuan steam.
Karakterisasi Asap Cair Distilasi dan Terdistilasi Vakum dari Limbah Serasah Pinus Wafa Karimatul Azmi; Ihak Sumardi; Yoyo Suhaya
JURNAL SELULOSA Vol 11, No 02 (2021): JURNAL SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25269/jsel.v11i02.334

Abstract

Characterization of Distilled and Vacuum Distilled Liquid Smoke from Pine Litter WasteAbstractThe solid waste of pine litter in the form of leaves, strobilus, and pine sawdust in the gondorukem and turpentine factories is still minimally utilized and causes environmental problems. However, the presence of cellulose, hemicellulose, and lignin content makes pine litter potential to be used as liquid smoke through the pyrolysis process. Liquid smoke has many benefits, including as an antiseptic and food preservative, but the characteristics of liquid smoke from pine litter are not yet known, so it requires further study. This research aims to determine the characteristics of smoke from pine litter waste, especially the composition of its chemical components, so the possibility for wider utilization can be known. The manufacture of liquid smoke is carried out through pyrolysis on pine litter waste, then given vacuum distillation treatment as a purification attempt. Tests on both samples using yield parameters, pH, total acid value, color organoleptic properties, specific gravity, and analysis of chemical components using gas chromatography-mass spectrometry. The results showed that the yield of liquid smoke and charcoal from waste pine litter is low, but the yield of vacuum distilled liquid smoke is huge. The distilled liquid smoke had a darker color, lower pH, higher total acid, and higher specific gravity than vacuum distilled liquid smoke. In general, the chemical components identified in both groups are divided into carbonyl, aryl alkyl ether, alkane, organic acids, and phenolic compounds. The content of phenolic compounds and furfural as the dominant compounds opens opportunities for use as wood preservatives, food preservatives, topical analgesics, antiseptics, fungicides, and nematocides.Keywords: liquid smoke, pine litter waste, vacuum distillation, chemical compound, characterizationAbstrakLimbah padat serasah pinus berupa daun, strobilus, dan serbuk kayu pinus di pabrik gondorukem dan terpentin masih minim pemanfaatannya dan menimbulkan masalah lingkungan. Serasah pinus memiliki kandungan selulosa, hemiselulosa, dan lignin yang berpotensi untuk dimanfaatkan sebagai asap cair melalui proses pirolisis. Asap cair memiliki banyak manfaat, di antaranya sebagai bahan antiseptik dan pengawet makanan. Namun asap cair dari limbah serasah pinus masih belum diketahui karakteristiknya, sehingga membutuhkan pengkajian lebih lanjut. Penelitian ini dilakukan untuk mengetahui karakteristik asap cair dari limbah serasah pinus berdasarkan sifat fisik dan susunan komponen kimianya, sehingga dapat diketahui peluang pemanfaatannya secara lebih luas. Pembuatan asap cair dilakukan melalui proses pirolisis pada limbah serasah pinus, lalu diberikan variasi perlakuan distilasi vakum sebagai upaya purifikasi. Pengujian pada asap cair distilasi dan asap cair terdistilasi vakum menggunakan parameter rendemen, pH, nilai total asam, sifat organoleptik warna, bobot jenis, dan analisis komponen kimia menggunakan gas chromatography-mass spectrometry. Hasil penelitian menunjukkan bahwa asap cair dari limbah serasah pinus distilasi memiliki warna yang lebih gelap, pH yang lebih rendah, total asam yang lebih banyak, dan bobot jenis yang lebih tinggi daripada asap cair terdistilasi vakum. Secara umum, komponen kimia yang teridentifikasi pada keduanya terbagi dalam kelompok karbonil, alkana, aril alkil eter, senyawa asam, dan senyawa fenolik. Asap cair distilasi mengandung beberapa senyawa dari kelompok terpena dan terpenoid, sedangkan asap cair distilasi vakum mengandung senyawa dari kelompok alkaloid. Kandungan senyawa fenolik dan furfural sebagai senyawa dominan membuka peluang pemanfaatan sebagai pengawet kayu, pengawet makanan, analgesik topikal, antiseptik, fungisida, dan nematosida.Kata Kunci: asap cair, limbah serasah pinus, distilasi vakum, komponen kimia, karakterisasi