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All Journal Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)

Sudijono Sudijono

Unknown Affiliation

Author-ID : 3653980

Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Energy

Published : 6 Documents Claim Missing Document

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Pengaruh Persentase Katalis pada Pembuatan Perekat Kayu Cair terhadap Daya Rekatnya sebagai Bahan Perekat Substitusi Fenol Formaldehida pada Pembuatan Kayu Lapis The Effects of Catalyst Percentage Used in Producing Wood Liquid on Its Bond Strength as Phenol Formaldehyde Substitute Adhesive in Plywood Production Bambang Prasetya; Euis Hermiati; Sudijono Sudijono
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 2 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this research was to study the effects of percentage of catalyst used in producing wood liquid (WL) on its bond strength as Phenol Formaldehyde (PF) substitute adhesive in plywood production. Albizia (Paraserianthes falcataria) wood flour passed 60 mesh sieves having around 5% moisture content was liquefied in phenol solution. Catalyst used, sulfuric acid 98%, was added at the level of 1%, 2% and 3% of the total phenol solution. The wood liquid obtained was observed and measured for its physico-chemical properties, including color, total solid, pH, specific gravity and viscosity. The degrees of PF substitution tried were 100/0, 80/20, 60/40, 40/60 and 20/80 (PF/WL). Those adhesive mixtures were used in the preparation of plywood made of Meranti (Shorea sp.) and Keruing (Dipterocarpus spp.). Bond strength of the plywood samples were determined based on the Indonesian National Standard (SNI 01 – 2704 – 1992). Results of the research showed that Albizia wood flour could be completely liquefied by phenol and sulfuric acid. Bond strength testing of exterior grade plywood samples of Meranti showed that a quite high percentage of catalyst (3%) decreased bond strength, while that of Keruing showed that the higher the percentage of catalyst, the higher the bond strength. In general, adhesive composition of 80/20, 60/40 and some 40/60 (PF/WL) can be used as plywood adhesive and meet the SNI for plywood.

Modifikasi Alat Pelengkung Kayu Skala Pilot dengan Menggunakan Pemanas Modification of Pilot-scale Wood Bending by Heating Elements Teguh Darmawan; Jayadi Jayadi; Sudijono Sudijono; Ika Wahyuni; Yusuf Amin; Wahyu Dwianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 1 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This paper deals with manufacturing and modification of pilot-scale wood bending machine by heating elements. The machine has specifications as follows: 1000 mm width; 1305 mm height; 430 mm and 470 mm radius of upper part and bottom part of bent plates, respectively; and a manual stick pressure with 870 mm length. The upper part and bottom part of bent plates are equipped with heating elements, which the maximum of temperature is arranged to 200°C by the electric force of 220V/2000 watt. Left and right sides of bent plates are covered by 1150 mm x 950 mm insulation board to maintain the heat. From the temperature measurement, the heating plates were reached 50°C in 2.5 minutes, 100°C in 9.5 minutes, and 180°C in 28 minutes. The modified machine has successfuly bent Acacia solid wood with dimensions of 1100 mm(L) x 50 mm(T) and 10 mm, 20 mm, and 30 mm in thickness (R).

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).

Pemanfaatan Lumpur Minyak untuk Pembuatan Komposit Berserat Lignoselulosa Utilization of Oil Sludge as a Lignocellulosic Fiber Reinforced Composite Material Bambang Prasetya; Sudijono Sudijono; Purwadi Kasinoputro
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 1 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Utilization of Oil Sludge (OS) is facing until now many problems due to heavy metal content. This experiment tried to find out an alternative how to use of OS as a lignocellulosic fiber reinforced composite material. One important reason for this purpose is the wide utilization of composite material for building material. Two problems have to be solved are how to catch the heavy metal and how to increase the bonding ability of OS. In this experiment additive PTA08 was used for catching the heavy metal. The OS with additive PTA were mixed at temperature of 80ºC and fiber in varying composition (40, 50 and 60 % based oven dry weight of raw material). After mat forming, the material was pressed at temperature of 120ºC for 20 minutes. The density of composite was arranged from 0.5, 0.6 and 0.7 g/cm3. Two percent of phenol formaldehyde resin was used to increase the bonding ability of composite material. The experiment results showed that in general the OS could be used as raw material for production of composite material with medium strength. Modulus of rupture (MOR) could reach 75~120 kg/cm2, while modulus of elasticity (MOE) 5000~7000 kg/cm2. Water absorption of the product was excellent namely below 20 %, and the thickness swelling varied from 8 to 18 %. The leaching test results showed that the leaching of heavy metal was fulfilled the standard

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.

The Age And Paleoenvironment of The Pakaurangi Formation, Waitakere Group, Northland, New Zealand, Based on Ostracoda Fauzie Hasibuan; A.R Hasibuan; Sudijono Sudijono
Jurnal Geologi dan Sumberdaya Mineral Vol. 16 No. 5 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v16i5.373

The Early Miocene Pakaurangi Formation, Waitakere Group, have a high diversity of Ostracoda. Key species include Loxoconcha propunctata, Bradleya semiarata, Bradleya lactea pakaurangia, Hemycythere tarakohensis and Bairdia canterburyensis, and indicate an Altonian age, completely in agreement with foraminiferal ages from this area by other workers.The species Trachyleberis zeacristata Hornibrook is transferred to Henryhowella. Paijenborchella iocosa Kingma, and many generic level taxa were also found in a borehole in Bojonegoro, East Jawa, Indonesia. The previously recorded Clifdenian to Waitotaran range of Henryhowella probesioides Hornibrook is extended downwards into the Altonian. The Ostracoda also show the paleoenvironment of the Pakaurangi Formation to be littoral to neritic, which is also in agreement with the evidence of foraminifera and molluscs as reported by previous workers.Â Keywords: Ostracoda, Pakaurangi Formation, Waitakere Group, Altonian, New Zealand

Co-Authors A.R Hasibuan Bambang Prasetya Bambang Subiyanto Entang Rasyid Euis Hermiati Fauzie Hasibuan Ika WAHYUNI Jayadi Jayadi Mohamad Gopar Mohamad Gopar Mohamad Gopar Purwadi Kasinoputro Sasa Sofyan Munawar SUBYAKTO SUBYAKTO Teguh DARMAWAN Wahyu DWIANTO Yusuf Amin

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