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All Journal Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Penelitian Hasil Hutan

Kurnia Wiji Prasetyo

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Author-ID : 3653957

Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Materials Science & Nanotechnology

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Sifat Fisik dan Mekanik Batang Gewang (Corypha utan Lamk.) dari Nusa Tenggara Timur Physical and Mechanical Properties of Gewang (Corypha utan Lamk.) Stem from East Nusa Tenggara Kurnia Wiji Prasetyo; Subyakto Subyakto; B. Paul Naiola
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 1 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Gewang (Corypha utan Lamk.) is an important palm grown wild in the savannah of East Nusa Tenggara, Indonesia. The genus Corypha, belong to Arecaceae or Palmae consist of about 8 species distributed from tropical Africa to India, tropical Asia, Indochina, Malaysia, and Quensland. Corypha grows in lowland of very dried climate and savannah. The local people have used this palm traditionally for many purposes to fulfill their daily needs. Trunks are used for producing starch for food, cattle food (putak), building material for housing, furniture and fence.Basic properties of stem from Gewang palm are identified according to the height and depth of samples in the stem. The properties identified are physical properties including density, water absorbtion and shrinkage on thickness and length direction; mechanical properties including modulus of elasticity (MOE), modulus of rupture (MOR) and maximum crushing strength pararel to grain.Almost all properties tested are affected significantly by the height and depth of samples in the Gewang stem, where the influence of depth stem factor is higher than the height stem factor. Gewang stem from the bottom part of the stem produces better properties than middle and top part, indicates by a higher density, lower water absorption and shrinkage values. Similarly, physical properties of the outer part Gewang stem is higher than those in the medium and center parts. The mechanical properties result shown same phenomena that the bottom part of Gewang stem produces better properties than middle and top part, indicates by a higher modulus of elasticity, modulus of rupture and maximum crushing strength pararel to grain values. Similarly, mechanical properties of the outer part Gewang stem is higher than those in the medium and center parts.

Pemanfaatan Kulit Kayu Akasia (Acacia mangium Willd) untuk Papan Partikel dengan Kadar Fenol Formaldehida Rendah Utilization of Acacia (Acacia mangium Willd) Bark for Particleboard with Low Phenol Formaldehyde Content Subyakto Subyakto; Lisman Suryanegara; Mohamad Gopar; Kurnia Wiji Prasetyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Industrial forest plantation is a future for supplying raw material of wood industries. From the wood harvesting, bark wastes are abundantly resulted. As an illustration, a pulp factory in Palembang produces about 500 ton per day of bark waste of Acacia mangium Willd. At present the utilization of bark wastes was not optimally done. The purpose of this experiment was to utilize bark waste for particleboard, it is expected that high tannin content in the bark will reduce amount of adhesive applied.Fresh bark was cut into chips and processed further with a ring flaker machine to produce bark particles. Bark particles were mixed with Phenol Formaldehyde adhesive and water then hot pressed at temperature of 150ºC, pressure of 20 kgf/cm2, for 15 minutes. Amount of adhesive was varied at 4%, 6% and 8% based on dry weight of particles. Water was added for 10% of dry weight of particles. The size of board was 25 cm x 25 cm x 1 cm, with target densities of 0.7 and 0.9 g/cm3, with 2 replications. Boards were tested for their physical and mechanical properties in accordance with JIS A 5908.Results shown that board with density of 0.9 g/cm3 and amount of adhesive of 6% and 8% have internal bond and MOR (modulus of rupture) that met JIS A5908 type 8; while values of MOE (modulus of elasticity) and thickness swelling were not met the standard

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

PEMANFAATAN CAMPURAN BATANG JAGUNG DAN BAMBU SEMBILANG SEBAGAI BAHAN BAKU PAPAN PARTIKEL Dede Hermawan1; Jajang Sutiawan; Nofrisman Jaya Putra Zendrato; Robi’atul Utami Aini; Ismail Budiman; Kurnia Wiji Prasetyo
Jurnal Penelitian Hasil Hutan Vol. 38 No. 1 (2020): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2020.38.1.1-9

Corn stalk (Zea mays L.) can be used as an alternative material in the manufacture of particleboards. However,particleboards made from corn stalks has inferior mechanical properties which could not meet the Japanese standard(JIS A 5908: 2003). Such performance can be improved by adding other material which possesses high strength value,such as bamboo sembilang (Dendrocalamus giganteus Munro). This study examined properties of cornstalkparticleboard which was added into bamboo sembilang fibers in various compositions. Urea formaldehyde and phenolformaldehyde were used as binding agent with 10% adhesive content. Composition of fiber mixtures between corn stalkand sembilang bamboo were set in 100 : 0; 75 : 25; 50 : 50; and 25 : 75. The targetted density of particleboardwas set at 0.80 g/cm3. Mechanical properties of the produced particleboards were evaluated according to JIS A5908:2003 standard. Results showed that particleboard produced using composition of 25% corn stalk and 75%sembilang bamboo bonded with phenol formaldehyde had better mechanical properties than those of the other mixtureraw materials and adhesives. Additional high strength of lignocellulose material such as bamboo is one alternative toenhance mechanical properties of cornstalk particleboard.

Co-Authors B. Paul Naiola Bambang Subiyanto Dede Hermawan1 Ismail Budiman Jajang Sutiawan Lisman Suryanegara Mohamad Gopar Nofrisman Jaya Putra Zendrato Robi’atul Utami Aini SUBYAKTO SUBYAKTO Teguh DARMAWAN Wahyu DWIANTO Yusup AMIN

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