Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Jurnal Ilmu dan Teknologi Kayu Tropis

JITKT
Website

Published by Masyarakat Peneliti Kayu Indonesia

ISSN : - EISSN : 16933834 DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Jurnal ini mempublikasikan artikel asli baik penelitian dasar maupun terapan di bidang ilmu pengetahuan dan teknologi kayu, bahan berlignoselulosa bukan kayu, hasil hutan lainnya dan industri hasil hutan.

Arjuna Subject : -

Articles 316 Documents

20 21 22 23 24

Synthesis of Aqueous Polymer Isocyanate for Plywood Adhesive Euis Hermiati; Dede Heri Yuli Yanto; Faizatul Falah
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this research was to produce natural rubber-based Aqueous Polymer Isocyanate (API) adhesives that could meet standard for exterior grade plywood adhesive. Base polymers used were Natural Rubber Latex (NRL), Natural Rubber Latex - Styrene (NRL-St), and polyvinyl alcohol (PVOH).There were two kinds of adhesives produced; one was using NRL and PVOH as base polymers, and the other one was using NRL-St and PVOH as base polymers. Isocyanate crosslinking agent was added to each kind of adhesives at 2.5; 5; 10; 15 and 20% of the weight of the base polymers. They were measured for their total solid content (gravimetric method), pH (using pH meter), specific gravity (using picnometer) and viscosity (using Brookfield viscometer). Thermal analyses using TG/DTA was conducted at the addition of 0, 5 and 15% cross-linking agent. The adhesives were spread on the surface of Red Meranti (Shorea sp.) veneers (250 x 250 x 2.1 mm core; 250 x 250 x 1.5 mm face and back) at the glue spread rate 400 g/m2 DGL (double glue line). The veneers with adhesives were cold pressed at 10 kg/cm2 for 10 minutes and then hot pressed at 10 kg/cm2, 110ºC for 5 minutes. The plywood produced was conditioned for 2 weeks, then they were measured for their bond strength, delamintaion ratio, water absorption, and thickness swelling. Results of this study showed that either NRL or NRL-St could be used as one of base polymers in preparing API adhesive. Bond strength of plywood adhered with API adhesives made of NRL-St at all levels of isocyanate crosslinking agent addition were higher than those made from NRL. The addition of 10% or more isocyanate croslinkers to NRL/PVOH (50:50) or to NRL-St/PVOH (50:50) could produce plywood having bond strength that could meet interior grade standard. Plywood having bond strength of exterior grade standard were produced when 15% or more isocyanate crosslinkers were added to NRL-St/PVOH (50:50) or when 20% or more isocyanate crosslinkers were added NRL/PVOH (50:50).

Properties of Oriented Strand Board Prepared from Steam Treated Bamboo Strands under Various Adhesive Combinations Adrin Adrin; Fauzi Febrianto; Sucahyo Sadiyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objectives of this research were to analyze the physical and mechanical properties of Oriented Strand Board (OSB) prepared from steam treated betung bamboo (Dendrocalamus asper) strands under various adhesive combinations. The strands were steamed at 126 °C for 1 h with the pressure of 1.4 kg cm-2 prior to be blended with adhesive. Three-layered OSBs with the core layer orientation perpendicular to the face layers were prepared by bonding using 5% methylene diphenyl diisocyanate (ISO), 7% phenol formaldehyde (PF), combination of ISO:PF:ISO and PF:ISO:PF adhesives. Paraffin in amount of 1% was added as an additive. The strand ratio for face, core, and back layers was 1:1:1, respectively.The results indicated that the physical properties i.e., water absorption and thickness swelling, and mechanical properties i.e., modulus of rupture and modulus of elasticity both parallel and perpendicular to the grain direction and internal bond of OSB bonded ISO and combination of ISO:PF:ISO adhesives were much better than that of bonded with combination PF:ISO:PF and PF adhesives. Almost all parameters of OSB tested in this experiment were higher than the minimum criteria requirement of CSA 0437.0 (Grade 0-2) standard, except the value of MOE perpendicular to the grain direction of OSB bonded with PF adhesive.Key words: betung bamboo, isocyanate, oriented strand board, phenol formaldehyde, steam

Penampilan Kayu Kelapa (Cocos nucifera Linn) Bagian Dalam yang Dimampatkan Performance of Densified Inner-Part of Coconut Wood (Cocos nucifera Linn) Isna Yuniar Wardhani; Surjono Surjokusumo; Yusuf Sudo Hadi; Naresworo Nugroho
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 2 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The inner-part of coconut wood has low to medium density, which have not been utilized yet optimally as construction material. The purpose of this study was to improve the properties of inner-part of coconut wood by densification, such as it can be considered as a substitute of wood. Pre-treatments were steaming (a1) and boiling (a2) at 120°C for 15 minutes, and pressing temperature were 150°C (b1) and 175°C (b2). Deformation targets were 10% (c1), 20% (c2) and 30% (c3) from the initial thickness. The results indicated that the treatments did not affect to some of the densified wood properties. The appearance of panel surface was smooth and shine, but darker than that of solid. The increasing of density was 4.43 ~ 27.21% with strain recovery of 0.17 ~ 0.52 after soaking in water for 24 hours at room temperature.

Characterization of Gutta Percha and Its Application as Plywood Adhesive Tati Karliati; Fauzi Febrianto; Wasrin Syafii; Imam Wahyudi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Gutta percha resin is a biodegradable and renewable elastomer trans-1,4- isoprene rubber and obtained from Palaquium tree through extraction of leaf or tapping of stem. The purposes of this research were to characterize the gutta percha and its application for wood (plywood) adhesive. Characteristics of gutta percha evaluated in this experiment were moisture content (MC), density, ash content, melting and decomposition temperatures. Plywood performance were evaluated under SNI 01-50019.10-2001 standard. Four different glue spread i.e.,175, 200, 225 and 250 g m-2 were introduced in this experiment. Five percent of maleic anhydride (MAH) and 1% of benzoyl peroxide (BPO) were used as a modifier and an initiator, respectively. The result showed that gutta percha has white to creamy color. The density, MC and ash content of gutta percha were 1.01 g cm-3, 6.09%, and 0.074% respectively. The melting and decomposition temperatures of gutta percha were noted 72.6°C and 482.2°C, respectively. Modification of gutta percha with 5% MAH enhanced the shear strength of resulted plywood. Modified gutta percha with 5% MAH in absence of BPO with glue spread of 250 g.cm-2 can be used for interior and exterior plywood adhesive. Their shear strength value fulfilled the requirement of SNI 01-5008.2-1999 standard.Key words : benzoil peroxide, glue spread gutta percha, maleic anhydride, plywood, wood adhesive

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.

Perubahan Kadar Komponen Kimia pada Tiga Jenis Bambu Akibat Proses Steam dan Pembilasan (Chemical Components Changed in Three Bamboo Species Treated by Steaming and Washing Processes) Murda, Rio A; Nawawi, Deded S; Maulana, Sena; Maulana, Muhammad I; Park, Se-Hwi; Febrianto, Fauzi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (38.454 KB)

Bamboo has good prospects for composite raw materials such as for Oriented Strand Board (OSB) product. Previous research has shown that steam and rinsing with water and 1% NaOH solution treatments of strand improved the properties of OSB, which might be caused by changing in the chemical components content of bamboo. This study aimed to determine the chemical components content change of sembilang bamboo (Dendrocalamus giganteus Munro), black bamboo (Gigantochloa nigrocillata Kurz.), and tali bamboo (G. apus (Bl.ex Schult.f.)) due to steam and rinsing treatment. The chemical components of bamboo were analyzed referring to the Technical Association of the Pulp and Paper Industry standards (TAPPI). The results showed that the most significant changes in the chemical components content of bamboo occured for holocellulose, hemicellulose, extractive contents, and pH values. The decreasing of hemicellulose, extractive contents, and increasing pH values due to the steam and 1% NaOH rinsing treatment may improve the adhesion quality of OSB.Keywords: bamboo, chemical components, steam modification, strand,

The Characteristics of Beaten and Unbeaten Mixed Tropical Hardwood Kraft Pulp Nyoman J Wistara; Hotman Effendi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

In the present works, pulp fibers were fractionated with Bauer McNet fiber fractionators and were classified into long fiber (R30), short fiber (P30/R100) and fines (P100/R200). Water retention value (WRV), dimensions measurements and pulp viscosity of fibers were determined based on of the modified method of Thode et al. (1960), the standard method of SII 1883-1986 and TAPPI 230 om-94, respectively. The measurement of fiber dimensions were done on 200 individual fibers. The increase of short fiber fraction clearly indicated fiber shortening effect of beating process. Beating processes increased WRV of fines above that of long fiber fraction. Beating of pulp did not significantly change the derivative value of fibers, but significantly decreased pulp viscosity.Key words: fiber classification, fines, pulp beating, water retention value (WRV).

The Effect of Jabon Veneer Quality on Laminated Veneer Lumber Glue Bond and Bending Strength Istie Rahayu; Wayan Darmawan; Naresworo Nugroho; Remy Marchal
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 2 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Jabon (Anthocephalus cadamba) is a fast growing wood species widely planted by community in Indonesia. Jabon has large percentage of juvenile wood which affect its veneer quality. This research objective were to determine the effects of wood juvenility and pretreatment on lathe checks, surface roughness and contact angle of the 3.00 mm rotary-cut jabon veneer and to analyze the impact of lathe checks frequency on the LVL glue bond and bending strength. Jabon logs were subjected to boiling in 75 °C water for4 h. Then they were peeled to produce 3.00 mm veneers in thickness. Frequency, length and depth of lathe checks were measured per 10 cm veneer length by using optical microscope. Laminated veneer lumber (20x20x500) mm3 were made from 7-ply of jabon veneers by using Poly Vinyl Acetate (PVAc) as adhesive. Glue bond strength and bending strength were measured by UTM Instron. The results showed lathe check (frequency, length and depth), surface roughness and contact angle were influenced by juvenility. Glue bond strength, Modulus of Elasticity (MOE) and Modulus of Rupture (MOR) of jabon LVL decreased as frequency of lathe check increased.

Pengaruh Lama dan Suhu Aktivasi Terhadap Kualitas dan Struktur Kimia Arang Aktif Bagasse Effect of Time and Temperature Activation on Quality and Chemical Structure of Bagasse Activated Charcoal Wawan Sujarwo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 2 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this research was to determine the effect of time and temperature activation on the quality and chemical structure of bagasse activated charcoal. The study was designed in a completely random design with 3 x 3 factorial, each treatment was 5 times repeated. Bagasse was carbonized in an electrical retort at 400oC for 3.5 hours, then activated at 800oC, 900oC and 1000oC for 30, 60 and 90 minutes at each temperature. The quality of bagasse activated charcoal showed that the yield was 72.57 ~ 91.78%, 5.90 ~ 9.58% moisture content, 39.70 ~ 52.70% volatile matter, 18.40 ~ 25.30% ash content, 26.30 ~ 36.70% fixed carbon, 8.44 ~ 13.40% benzena adsorption, 1036.18 ~ 1474.33 (mg/g) iodium adsorption, 121.91 ~ 124.80 (mg/g) methylene blue adsorption. The surface area of bagasse activated charcoal was 250.45 m2/g. The FTIR analysis indicated that surface of bagasse activated charcoal contained bonding of C-X, S═O, C-N, N-H and C═C. The SEM analysis showed that there were wide pore diameter and plenty of pores. The application of bagasse activated charcoal at two villages reduced the colour, turbidity and iron contents until 65%, 30% manganese contents while hardness of water and pH did not change

An Experimental Study on the Flexural Behavior of Glulam Beam of Pinus Wood (Pinus merkusii) Fengky S Yoresta
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aimed of this research was to determine the flexural behavior of glulam beam made from pine wood (Pinus merkusii) under various laminate thicknesses and then compared to its solid beam. The material used was pine wood with moisture content of 10% and and polyurethane adhesive (Water based polymer isocyanate, WBPI). Four types of glulam beams (namely, Glulam A, B, C, and D) produced with laminate thickness of 25, 16.67, 12.5, and 10 mm, respectively. Solid beam was also prepared as control. All beams have a cross sectional dimension of (50x50) mm2. Bending test is conducted using a 5 ton capacity of Universal Testing Machine, Instron 330. The results indicated that incerasing in number of laminate to a point tend to increase the values of stiffness and modulus of rupture (MOR) of glulam beams. However, the higher of laminate thickness tends to decrease the stiffness and MOR values. Energy absorption of solid beam was noted twice compared to glulam beams.Key words: flexural behavior, glulam beam, modulus of rupture, Pinus merkusii, stiffness

Page 22 of 32 | Total Record : 316

20 21 22 23 24

Filter by Year

2003 2022

Filter By Issues

All Issue Vol 20, No 1 (2022): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 18, No 1 (2020): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 2 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 1 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 2 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 1 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 2 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 1 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 2 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 2 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 2 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 1 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 2 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 2 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 2 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 2 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 2 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 2 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 2 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 1 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 1 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 5, No 2 (2007): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 5, No 1 (2007): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 2 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 1 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 1 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 2 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 1 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 1 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Unknown,

Unknown

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Unknown, Unknown INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Unknown,

Unknown

INDONESIA