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All Journal Jurnal Ilmu dan Teknologi Kayu Tropis

Muhammad Y Massijaya

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Author-ID : 3654033

Agriculture, Biological Sciences & Forestry

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Articles

Characteristics of Sengon Rotary-Cut Veneer Abigael Kabe; Wayan Darmawan; Muhammad Y Massijaya
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 2 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Fast growing sengon is largely rotary-cut to produce veneer for plywood, com-ply and LVL. In order to provide better information on veneer production and utilization, in this study the effects of wood juvenility and veneer thickness on lathe checks of sengon rotary-cut veneer were evaluated. Before veneer manufacturing, the sengon log was boiled at 50 and 75 oC for 4 and 8 h, respectively. The boiled logs were peeled to produce veneer of 1 and 2 mm in thickness. Lathe checks of veneers were measured under an optical video microscope. The rotary-cut veneer was grouped and evaluated separately at every segmented ring of 2 cm from pith to bark. The results showed that wood juvenility and veneer thickness had an important effect on lathe checks for the rotary-cut veneer. In general, the number of lathe check of the veneer increases with increasing veneer thickness and increase from pith to bark. Boiling of logs before rotary-cutting could decrease the value of lathe check. The results indicated that boiling of logs at 50 oC for 8 h, and at 75 oC for 4 and 8 h could minimize the number of lathe checks in manufacturing of 1 and 2 mm rotary-cut veneer from juvenile wood sengon.Key words: juvenility, lathe check, Paraserianthes falcataria, rotary-cut veneer, veneer thickness

Bond Ability of Oil Palm Xylem with Isocyanate Adhesive Atmawi Darwis; Muhammad Y Massijaya; Naresworo Nugroho; Eka M Alamsyah; Dodik R Nurrochmat
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Oil palm xylem composed of vascular bundles and parenchyma tissue and directly related to its properties. Utilization of oil palm xylem into the wood laminate products requires information on its bond ability to adhesive used. Isocyanate adhesive is a prospective adhesive due to its various advantages compared to other adhesives. This study aimed to obtain information about the bond ability of the oil palm xylem with isocyanate adhesive. The results showed that isocyanate adhesive has good wettability on oil palm xylem indicated by its contact angle of below 90°. Isocyanate adhesive also showed good performance by looking at the value of wood failure and delamination. However, the shear strength of laminated oil palm xylem was low. Wood failure occurred in the parenchymal tissues region.Key words: bond ability, isocyanates, laminated board, oil palm xylem

Fundamental Properties of Ply Bamboo Jajang Suryana; Muhammad Y Massijaya; Yusuf Sudo Hadi; Dede Hermawan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 2 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Physical and mechanical properties of ply bamboo made from various bamboo species and adhesive type were studied. Bamboo species used in this study were tali (Gigantochoa apus), andong (Gigantochloa verticillata), and betung (Dendrocalamus asper). Five types of adhesives were used for the experiment, namely methylene diphenyl isocyanate (MDI), phenol formaldehyde (PF), melamine formaldehyde (MF), urea formaldehyde (UF), and poly vinyl acetate (PVAC). Three layer of ply bamboo with (40x40x0,4) cm3 in size was made by weight spread of adhesive 200 g m-2, compression temperature at 140 ºC for MDI and PF, 110 ºC for MF and UF, and room temperature for PVAc adhesives, with specific pressure of 15 kg cm-2 for five minutes. Especially for PVAc, cold compression was carried out using a clamp for 24 h. Fundamental properties of ply bamboo was tested according to SNI 01-5008.7-1999. The results showed that the development dimension of the ply bamboo from the largest to the smallest was in the side of thick, wide, and long, while for timber and plywood were in the side orientation of tangential (width), radial (thick), and longitudinal (long). The best physical and mechanical properties of ply bamboo were obtained from betung bamboo using MDI adhesive.Key words: melamine formaldehyde, methylene diphenyl isocyanate, phenol formaldehyde, ply bamboo, poly vinyl acetate

The Quality of Zephyr Board Made from Oil Palm Brunch (Eleais guenensis Jacq.) Lusita Wardani; Muhammad Y Massijaya; Yusuf Sudo Hadi; Wayan Darmawan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this research was to evaluate the physical, mechanical and durability properties of zephyr board made from oil palm petiole. Urea formaldehyde (UF), phenol formaldehyde (PF) and isocyanate (IC) resins were used to bind zephyrs. Board size produced was (300x300x12) mm3, and target density of zephyr board was set at 0.80 g cm-3. The temperature and pressure of hot pressing were set at 120 °C and 25 kg cm-2 for 20 min. The result showed that physical and mechanical properties of zephyr board fulfilled JIS A 5908-2003. All board density in this experiment did not reach the density target. The moisture content of zephyr board bonded with IC resin was the lowest compared to zephyr board bonded with UF and PF resins. Over all the mechanical properties of zephyr board bonded with UF resin showed the best result in term of modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), and screw resistant (SR) parameters compared with zephyr board bonded with PF and Isocyanate resins. Zephyr board was classified into I-II class for strength class and I-IV class for resistance against dry and subterranean termites, attack respectively.Key words: durability, mechanical properties, physical properties, resin type, zephyr board

Response of Andong Bamboo (Gigantochloa pseudoarundinacea) to Isocyanate Adhesive Ignasia M Sulastiningsih; Surdiding Ruhendi; Muhammad Y Massijaya; Wayan Darnawan; Adi Santoso
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The response of Gigantochloa pseudoarundinacea to isocyanate adhesive was investigated by evaluating its bonding quality. The bamboo strips were categorized based on the position at the bamboo culm viz bottom,midle, and top. One part of the bamboo strips were immersed in 7% boron solution for 2 hours.The treated and untreated bamboo strips were glued parallel to each other using the isocyanate adhesive at the glue spread of 250 g m-2 to produce two-ply laminates. The bonding surfaces of two-ply laminates were designed into 3 different combinations viz between inner and outer surfaces, both between inner surfaces, and both between outer surfaces. The bonding strength and bamboo failure were evaluated in dry and wet conditions. Results showed that the response of G. pseudoarundinacea to isocyanate adhesive was significantly affected by the posision at the bamboo culm, bamboo strips treatment and combination of bonding surfaces. In comparasion with the middle and the top part, the bottom part of bamboo culm had the highest bonding strength (dry test). However, the wet test results showed that the bonding strength of laminates made from bottom part did not significantly different with that of middle part. The preservation treatment on bamboo strips reduced the bonding strength.Key words: bamboo, bonding strength, isocyanate, laminates, preservation

Utilization of Oil Palm Wastes and Recycled Plastic as Raw Materials for Wood-Plastic Composites Lusita Wardani; Muhammad Y Massijaya; Muhammad F Machdie
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This study examined the physical and mechanical properties of wood plastic composites made from recycled propypropylene (RPP) and oil palm biomass wastes under various particle sizes and pressing temperatures. Oil-palm biomass wastes (ie., oil palm trunk(OPT) was used as filler. The OPT was produced in 3groups (i.e., passed from 20, 40,and 60 meshes filtered). The RPP and OPT or EFB ratio were 7:3. Maleic anhydride (MAH) and benzoil peroxyde (BPO) were used as a modifier and an inisiator in amount of 5% based on RPP and MAH weight, respectively. The hand-mixtures of RPP and OPT or EFB with or without MAH and BPO were subjected to hot-press at 180 ⁰C and 190 ⁰C for 10 min at 15 kgf cm-2 pressure. The results indicated particle sizes, MAH and BPO and pressure of temperature were influences of physical and mechanical properties of WPC from OPT. Samples WPC with MAH and BPO have a highest value than samples without MAH and BPO. Testing was done according to standard JIS A 5908-2003. Preliminary research results shown that particle from palm oil trunk with additive content shown the best physical and mechanical properties compared to the others.Key words: benzoil peroxide, empty fruit bunches, maleic anhydride, oil palm trunk, particle size, recycle polypropylene

Characteristics of Plybamboo made from woven mat of Andong Bamboo (Gigantochloa pseudoarundinaceae) Ega P Yoga; Sukma S Kusuma; Jajang Suryana; Muhammad Y Massijaya
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this research was to analyze the influence adhesive types, composition of width and thickness of bamboo strips to the physical and mechanical properties of plybamboo. Keywords: andong bamboo, epoxy, plybamboo. PVAc

Co-Authors Abigael Kabe ADI SANTOSO Atmawi DARWIS Dede Hermawan Dodik R Nurrochmat Ega P Yoga Eka M Alamsyah I Wayan Darmawan Ignasia Maria Sulastiningsih Jajang Suryana Lusita WARDANI Muhammad F Machdie Naresworo Nugroho Sukma S Kusuma Surdiding Ruhendi Wayan Darnawan Yusuf Sudo Hadi

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