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All Journal JURNAL SELULOSA EQIEN - JURNAL EKONOMI DAN BISNIS Jurnal Ilmu dan Teknologi Kayu Tropis Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Jurnal Ekonomika dan Bisnis Jurnal Ilmiah Wahana Pendidikan

Bambang Subiyanto

Unknown Affiliation

Author-ID : 2212537

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Social Sciences Other

Published : 21 Documents Claim Missing Document

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Pengembangan Papan Komposit dari Limbah Perkebunan Sagu (Metroxylon sago Rottb.) (Development of Composite Board made from Sago (Metroxylon sago Rottb.) Plantation Waste) Sukma S Kusuma; Ruslan Ruslan; Muhammad Daud; Ika Wahyuni; Teguh Darmawan; Yusup Amin; Muh. Y Massijaya; Bambang Subiyanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 2 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Plantation waste has gained increasing attention as an alternative raw material for use in the manufacture of composite boards, i.e. waste of sago plantation. Medium density composite boards were made from zephyr of sago midrib to evaluate the effects of resin and adhesive content levels. The boards were fabricated using polyurethane (PU) and phenol formaldehyde (PF) resin with three levels of adhesive content i.e. 10%, 12%, and 14%. Physical (moisture content, density, water absorption, and thickness swelling) and mechanical (Modulus of Rupture, Modulus of Elastisity, Screw Holding, and Internal Bonding) properties of composite board were evaluated according to JIS A 5908-2003 standard. Research result showed that properties of composite board made from sago frond with 14% content level of polyurethane adhesive better than other composite board. Based on composite board properties, the board was suitable as building raw material and furniture i.e. partition, cupboard, table, and roof.

Sifat Fisis Mekanis Papan Partikel dari Serat Sisal atau Serat Abaka setelah Perlakuan Uap Physical and Mechanical Properties of Particleboard Made from Steamed Treated Sisal or Abaca Fibers Firda A Syamani; Kurnia W Prasetyo; Ismail Budiman; Subyakto Subyakto; Bambang Subiyanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 2 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Composites made from natural fibers have several weakness, particularly on thickness swelling, due to fiber dimensional changes during swelling of fiber cell wall or changing of lumen dimension by moisture uptaken. Steam treatment on fiber had been expected could reduced fiber water absorbancy by plasticized matrix of fiber cell walls. Fiber of Sisal and Abaca was chopped into 0.5 ~ 2.0 cm of length. Steam treament was conducted in autoclave for 30 minutes on 1.15 atm of pressure and 121ºC of temperature. Chopped fiber was dried in 60ºC oven to obtain 4% of moisture content. Dried fiber was mixed with 10% urea formaldehyde (UF) resin or 8% and 10% melamine urea formaldehyde (MF) resin (based on weight of fiber oven-dried). Glued fiber was formed into 25cm x 25cm x 0.8cm mat, then hot pressed at 20 kgf/cm2 pressure for 10 minutes. Target density was 0.7 g/cm3. Composites conditioning was conducted at room temperature for moisture equilibrium to the enviroment. Physical dan mechanical characteristics testing was carried out based on JIS A 5908 for particle board. Steam treatment could improved physical and mechanical properties of particleboard made from sisal fiber using 8% MF.

Pemanfaatan Limbah Tandan Kosong dari Industri Pengolahan Kelapa Sawit untuk Papan Partikel dengan Perekat Penol Formaldehida Utilization of Empty Fruit Bunch Waste from Oil Palm Industry for Particleboard Using Phenol Formaldehyde Adhesive Bambang Subiyanto; Subyakto Subyakto; Sudijono Sudijono; Mohamad Gopar; Sasa Sofyan Munawar
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 2 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Empty Fruit Bunch (EFB) is waste from oil palm industry that has potential to be used as particleboard material. Production of particleboard might be useful to decrease the waste from oil palm industry. The problem in using waste from oil palm is the high extractive content that can decrease adhesive properties in panel production using thermoplastic adhesive, cement or thermosetting adhesive. The problem can be solved by special treatment to oil palm waste to decrease the extractives content. The objective of this research is to observe the influence of some treatments of EFB, density and adhesive content on the physical and mechanical properties of particleboard using phenol formaldehyde adhesive. Adhesive content used were 8%, 10% and 12% from oven dry weight of particles, while density was varied at 0.6 g/cm3, 0.7 g/cm3, and 0.8 g/cm3. Pre-treatment for EFB particles were cold water soaking for 24 hours, hot water boiling for 2 hours, Ca(OH)2 1 % solvent boiling for 2 hours and NaOH 1 % solvent boiling for 2 hours.The results showed that cold water soaking treatment for 24 hours and hot water boiling for 2 hours was the optimum treatment. The optimum content of adhesive was 10% with minimum density of 0.7 g/cm3. Thickness swelling for all type of EFB particleboards were not met the JIS A-5908, while internal bond, screw withdrawal and modulus of rupture (MOR) were met the type 8 of JIS A-5908 (1994).

Karakteristik LVL Lengkung dengan Proses Kempa Dingin Characteristic of LVL Bent by Cold Press Process Teguh Darmawan; Wahyu Dwianto; Yusup Amin; Kurnia Wiji Prasetyo; Bambang Subiyanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 2 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Bending LVL (Laminated Veneer Lumber) is a more effisien method to manufacture bent wood components compare to other methods in raw materials point of view. The Bending LVL was made from Sengon veneers by cold press process with variation of Water Based Polymer-Isocyanate adhesive of 250, 280, 310 g/m2 and bend radius of 200,300, 400 mm. The results showed that the physical properties of Bending LVL made by using Water Based Polymer-Isocyanate adhesive and cold press process was fit with JAS 1639/1986 standard. The optimum adhesive concentration and bend radius was 250 g/m2 and 20 cm, respectively

Permanent Fixation of Radially Compressed Bamboo in Dry Condition by Heating and Its Mechanism Bambang Subiyanto; Wahyu Dwianto; Takashi Higashihara; Toshiro Morooka; Misato Norimoto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The stress-strain relationship and stress relaxation of oven-dried bamboo in radial compressed by heating were investigated. The effect of heating temperature and time on the weight loss, residual stress and strain recovery were also examined. The results indicated that the apparent of stress-strain curve (SS-curve) of Indonesian bamboo was different with Mousou bamboo and Sugi wood. The apparent SS-curve of Mousou bamboo was same as general SS-curve of wood under heating. The effect of heating temperature on yield stress of oven-dry bamboo had different results with the Sugi wood. The yield stress of bamboo decreased slightly up to heating temperature of 140 °C, then it was significantly decreased with increasing temperature. The decreasing yield stress of bamboo at heating temperature above 140 °C could be due to degradation or decomposition of existing extractive component and hemicelluloses in bamboo by heating. Time to achieve stress relaxation decreased with increasing heating temperature. The stress relaxation of bamboo was attained faster than that of Sugi wood. Tali bamboo had a fastest to attain stress relaxation than others type of bamboo. The residual stress and strain recovery decreased with decreasing weight loss. The most interesting finding was residual stress of Indonesian bamboo (Gombong and Tali bamboos) was attained zero and stress recovery less than 0.2 when the weight loss at about 4%.Key words: bamboo, permanent fixation, stress-strain.

Wood Drying Method by “Teresan” Process on Sengon Wood (Paraserianthes falcataria L. Nielsen) Yoyo Suhaya; Bambang Subiyanto; Yoshinori Kobayashi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This research aims to confirm the effect of conventional teresan process as a natural drying on Sengon (Paraserianthes falcataria L. Nielson) standing trees, and to develop a new teresan process by adding Arboricide.The experiment was done in dry season at Kuningan, West Java. For the conventional teresan process, living trees were nicked into the cambial layer around the trunk at 15 ~ 25 cm in height from the ground. For the new teresan process, 25% percent kerosene solution of Arboricide Garlon 480EC was coated at the nick of the tree.Living Sengon trees in dry season showed high moisture content, i.e. around 60 ~ 100%. By the conventional teresan process, the reduction of moisture was almost the same as control trees. On the other hand, by the new teresan process coating with 25% kerosene solution of Arboricide Garlon 480EC it showed a large reduction of moisture content from over 100% to 30% in 4 months. The new teresan process showed the drying speed of 0.66% per day; higher than that of the conventional process, i.e. 0.24% per day. The new teresan process could be suggested as a high-speed natural drying method in the forest.

PEMANFAATAN SERBUK SABUT KELAPA SEBAGAI BAHAN PENYERAP AIR DAN OLI BERUPA PANEL PAPAN PARTIKEL Bambang Subiyanto; Raskita Saragih; Effendy Husin
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Dalam makalah ini akan dibahas tentang pengaruh kadar perekat dan kerapatan terhadap sifat fisis dan mekanis papan partikel berbahan baku serbuk sabut kelapa sebagai bahan penyerap air dan oli. Jenis perekat yang digunakan adalah perekat komersial urea formaldehida (UF) dengan kadar perekat divariasikan 10%, 15%, 20% berdasarkan berat kering tanur dengan target kerapatan 0,13; 0,15; 0,17; 0,20 g/cm3. Hasil penelitian menunjukkan bahwa kerapatan 0,20g/cm3 dan kadar perekat 20% adalah hasil terbaik, dimana semakin tinggi kerapatan dan kadar perekat maka semakin baik sifat fisis maupun mekanis papan serbuk sabut kelapa. Nilai pengembangan tebalnya menunjukkan hasil yang baik dan memenuhi standar JIS A-5908 1983. Untuk daya serap air dan oli nilainya sangat tinggi yaitu antara 510 % dan 390%. Oleh karena itu papan partikel yang terbuat dari serbuk sabut kelapa ini dapat digunakan sebagai bahan penyerap air atau oli

Pengaruh Lama Perlakuan Uap pada Serat terhadap Sifat Fisis dan Mekanis Papan Semen Serat Sisal Effect of Fiber Steaming Treatment on the Physical and Mechanical Properties of Sisal Fiber Cement Bonded Board Ismail Budiman; Mohamad Gopar; Subyakto Subyakto; Bambang Subiyanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The main problem of making Sisal fiber cement bonded board is how to mix fibers and cement to get excellent performance of board due to the presence of extractives. Steam treatment on fibers is expected to reduce extractives in the fibers; therefore it will improve the bonding between fibers and cement. Beside that, utilization of catalysts, such as calcium chloride (CaCl2) and magnesium chloride (MgCl2), is expected to increase the physical and mechanical properties of Sisal fiber cement bonded board. Fibers of Sisal was chopped into 0.5 ~ 1.0 cm of length. Steam treatment was conducted in autoclave for 30, 60 and 120 minutes at 1.15 atm of pressure and 121ºC of temperature, and untreated Sisal as control. Chopped fiber was dried in an oven at 60ºC to obtain 5% of moisture content. The content of CaCl2 or MgCl2 was 5% of cement weight.The board was produced at a dried fiber : cement ratio of 1 : 3 and water : cement ratio of 1 : 2 based on board weight. The target density of the boards produced was 1.25 g/cm3. Cement bonded Sisal fiber was formed into 25cm x 25cm x 1cm mat, and then cold pressed for 24 hours. Composites were conditioned at room temperature for 28 days. Physical and mechanical characteristics were tested by Universal Testing Machine (UTM). Results shown that combination of steam treatment and catalyst added improved the physical and mechanical properties such as thickness swelling (TS), modulus of elasticity (MOE), modulus of rupture (MOR), screw withdrawal (SW) and internal bond (IB).

Effect of Surface Density on the Fire Performance of Wood and Wood-Based Materials Anita Firmanti; Subyakto Subyakto; Bambang Subiyanto; Shuichi Kawai
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Surface density known as mass per unit area or as a product of density and thickness was analyzed as a key factor in predicting the fire performance of wood and wood based materials. Sawn timber of Mangium (Acacia mangium Willd) and Gmelina Arborea (Gmelina arborea Roxb.) in various thicknesses, manufactured particleboards and cement bonded particleboards of both species in various densities and thicknesses were used as the testing materials. Commercial particleboards, cement bonded particleboards and MDF were also tested. Boards were tested under ISO 5660 using cone calorimeter. Physical and mechanical properties were tested based on ASTM and JIS standards. The physical and mechanical properties of manufactured wood based panels could fulfil the JIS standard. Ignition time is affected by the surface density and effective surface area to the heat exposure of the boards. Boards reacted in different ways to the heat exposure but they needed similar time to the critical temperatures of 260 °C, in the similar surface density regardless of materials type. Surface density could be used as a key parameter in the fire resistant design process. The results of tested boards under ISO 5660 were about two third of those under JIS A 1304.Key words: cone calorimeter, fire resistant performance, surface density, wood, wood based materials.

Pembuatan Papan Partikel Berukuran Komersial dari Limbah Tandan Kosong Kelapa Sawit dengan Perekat Urea Formaldehida Development of Commercial Size Particleboard from Waste of Oil Palm Empty Fruit Bunches Using Urea Formaldehyde Adhesive Bambang Subiyanto; Subyakto Subyakto; Sudijono Sudijono; Mohamad Gopar Mohamad Gopar; Entang Rasyid; Sasa Sofyan Munawar
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 1 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Development of particleboard from waste of Oil Palm empty fruit bunches (EFB) using phenol formaldehyde adhesive has been done at small size (laboratory scale) in the previous study. Further development at commercial size board is conducted in the present study. The objective of this research is to observe the effects of EFB particleboard types and density on the physical and mechanical properties of particleboard using urea formaldehyde adhesive. The types of EFB particleboard were particleboard of entirely EFB particles, board layered with sawdust and board layered with plywood. Adhesive content used was 10% from oven dry weight of particles; wax content used was 12% from weight of adhesive. The board density was varied at 0.5 g/cm3, 0.6 g/cm3, and 0.7 g/cm3. The EFB particles were soaked for 24 hours in cold water before used.The results showed that EFB particleboard that layered with plywood at density of 0.7 g/cm3 gave the optimum result. Thickness swelling for all type of EFB particleboards were not met the JIS A 5908; therefore it need further study to overcome this problem. All mechanical properties such as internal bond, screw withdrawal, modulus of elasticity (MOE) and modulus of rupture (MOR) for EFB particleboard that layered with plywood were met the type 8 of JIS A 5908.

Co-Authors Anisa Putri Kusumaningrum Anita Firmanti Arni Karina Dede Heri Yuli YANTO Dewandaru Agung Pramita Dinda Tri Novianty Divian Dwi Febriyani Effendy Husin Entang Rasyid Euis Hermiati Firda A Syamani Fitria . Gagih Pradini Hasan Basri Heliyu Binti Ika WAHYUNI Ismadi . Ismail Budiman Kumba Digdowiseiso, Kumba Kurnia W Prasetyo Kurnia Wiji Prasetyo Linda Nurmala Sari Misato Norimoto Mohamad Gopar Mohamad Gopar Mohamad Gopar Muh. Y Massijaya Muhammad Daud Nabila Prillia Tasya Nada Virgita Nadya Putri Alvionita Nanang Masruchin Putri Aulia Ardani Raskita Saragih Renaldi Arindi Putra Ria Ria Rizkika Ariestantya Sujana Ruslan Ruslan Sasa Sofyan Munawar Shuichi Kawai Subyakto . SUBYAKTO SUBYAKTO Sudijono Sudijono Sukma S Kusuma Takashi Higashihara Teguh DARMAWAN Tiara Pradani Toshiro Morooka Triastuti Triastuti Wahyu DWIANTO Yetvi Rosalita Yoshinori Kobayashi Yoyo Suhaya Yoyo Suhaya Yusup AMIN

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