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DAYA TAHAN GARIS REKAT LRF PADA KAYU LAMINA MANII TERHADAP SERANGAN RAYAP KAYU KERING The LRF Glue Line Durability of Manii Laminated Wood Against Dry wood Termite Adi Santoso; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Lignin is one of the principal components constituting wood bulk, besides cellulose and hemi cellulose. It consists of poly-phenolic molecules, serving as a binding agent, which holds the wood cells together. Lignin is also credited with imparting rigidity or stiffness to the wood, rendering its body effectively resistant to the mechanical forces imposed on it. Considering and evaluating the specific attributes of lignin, an idea has come-up to utilize it as a binder or glue in the manufacture of particleboard, plywood, or other wood products.The lignin in the sulphate’s black liquor (known as Kraft lignin) has a strong affinity when being reacted with formaldehyde to form lignin formaldehyde adhesives; and to increase the bonding strength quality, the lignin is further co-polymerization with resorcinol to form lignin resorcinol formaldehyde (LRF) resins. The resin can be employed in the manufacture of particular glued wood products such as finger-jointed wood assembly and glue laminated lumber (glulam). The research was aimed to determine the optimum composition of mole ratio in LRF glue and its pressing duration in laminated wood manufacture for construction qualities with high durability on against dry wood termite. The adhesive was prepared by mixing the isolated lignin, resorcinol and formaldehyde at various mole ratios L : R : F ( 1 : 0.5 : 2; 1 : 0,7 : 2; 1: 0,9 : 2 and control) respectively, and the pressing duration was employed by 3, 6, 12 and 24 hours at room temperature. The research results showed that the higher the resorcinol content, the longer pressing time, the higher the mortality and the lower weight loss. The mortality reaches 91.67 % and weight loss 2.17 %.

The Resistance of Laminated Bamboo Boards to Subterranean Termite (Coptotermes curvignathus Holmgren) Ignasia M Sulastiningsih; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This study investigated the resistance of three-layer laminated bamboo boards (LBB’s) to subterranean termites (Coptotermes curvignathus Holmgren) according to the Indonesian standard (SNI 01.7207-2006). Bamboo strips for LBB fabrication were prepared from Gigantochloa pseudoarundinacea and assigned into 4 groups by pre-treatment methods namely: untreated, cold soaking in 5% boron solution for 2 hours, bleached by 17.5% and 20% hydrogen peroxide solutions. The LBB was formed by tannin resorcinol formaldehyde (TRF). Wheat flour was used as extender with two different concentrations (i.e., 2.5% and 5%) based on TRF weight. The results indicated that the resistances of LBB’s were much affected by pre-treatment methods. Applying different concentration of extender in TRF resin resulted in similar termite resistance of LBB’s against C. curvignathus Holmgren. Pre-treated of bamboo strips with 5% boron solution and bleached by 17.5% and 20% hydrogen peroxide solutions prior to be LBB manufactured improved the termite reistance of LBB’s against C. curvignathus Holmgren one level compared to untreated LBB. The termite-resistance of LBB made from untreated bamboo strips was categorized as class IV (poor) whereas those from boron- or hydrogen peroxide-treated bamboo strips belonged to class III (moderate).Key words: boron solution, hydrogen peroxide, laminated bamboo board, subterranean termite, tannin resorcinol formaldehyde

Pencegahan Serangan Bubuk Dinoderus minutus Farb. pada Bambu Lapis dan Kayu Lapis The Prevention of the Powder Post Beetle Dinoderus Minutus Farb. Infestation on Plybamboo and Plywood Jasni Jasni; I M Sulastiningsih
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Bamboo and wood are essential natural resources in Indonesia. Both natural resources can be made for plybamboo and plywood respectively. However, bamboo and wood are very susceptible to powder post beetle infestation. To cope with the infestation, a preservative treatment is applied. The permethrin preservative with active ingredient of 36.8 % was mixed in the urea formaldehyde glue, and the concentrations used were 0%; 0.5%; 1.0% and 1.5% based on urea formaldehyde weight (or 0 g/m3, 450 g/m3, 900 g/m3 and 1,350 g/m3 based on plybamboo or plywood volume). The bamboo species, Gigantochloa apus Kurz. and the wood species, Anthocephalus cadamba Miq. were used respectively. The durability of plybamboo and plywood were tested to the powder post beetle Dinoderus minutus Farb.The results revealed that the higher the preservative concentration the higher the mortality of powder post beetle, the lower the rate of beetle infestation for both on plybamboo and plywood. The addition of permethrin in the urea formaldehyde glue at the minimum level of 0.5% (450 g/m3) was effective to prevent the infestation of powder post beetle Dinoderus minutus Farb on plybamboo and plywood

Keterawetan dan Ketahanan Enam Jenis Kayu yang Diawetkan dengan CKB terhadap Rayap Tanah dan Bubuk Kayu Kering Treatability and Durability of Six Wood Species Treated by CKB Against Subterranean Termite and Powder Post Beetle Mohammad Muslich; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 1 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This paper discusses a study on the treatability and durability of six wood species treated by CKB preservative by full cell process against subterranean termite and powder post beetle. Six wood species measuring 5 cm by 5 cm by 60 cm were treated with 7% CKB preservative by full cell process for 1 hour, 2 hours and 4 hours in 150 psi. The treated and untreated wood samples were tested against subterranean termite and powder posts beetle for 8 months. The results of the study indicated that full cell process with CKB were able to prevent insect attack. Untreated woods specimens were susceptible to subterranean termite and powder post beetle attack. The results, after taking both retention and penetration showed that sengon (Paraserianthes falcataria (L.) Nielsen) were permeable; while cempaka (Elmerillia ovalis Dandy), surian (Toona sureni Merr.) and durian (Durio zibethinus Merr.) were moderately resistant. While mersawa (Anisoptera costata Korth.) and Palado (Aglaia sp.) were extremely resistant

Struktur Anatomi Tiga Jenis Batang Rotan Anatomical Properties of Three Rattans Culm Krisdianto Krisdianto; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Rattan is one of the monocotyl species, which is economically important. Rattan culm is used for furniture, souvenir and housewares. Indonesian rattan varies accordingly, but only about 30% of them have been developed. This paper describes anatomical structure of three rattan species to get information about its utilization. Three rattan species namely Balubuk (Calamus burchianus Becc.), Lilin (Calamus javensis Bl.) and Tretes (Calamus heteroideus Bl.) were used as samples. Macroscopically, anatomical structure was observed on massive rattan culm, while microscopically was observed from microtome-sectioned samples. Fibre dimension was observed from macerated samples. All anatomical quantities were compared to those of Manau rattan, since its utilization has been known. The metaxylem diameter of those three rattans was bigger than that of Manau rattan, so that those rattans were less durable than Manau. Fibre of rattan studied was shorter and thinner than that of Manau, as a result their strength were lower than that of Manau rattan. As their strength were less than Manau, the utilization of these three species was not recommended to work on direct forces

Pengaruh Pengukusan dan Perendaman dengan NaOH terhadap Pelengkungan Kayu Rasamala (Altingia excelsa Noronha), Asam Jawa (Tamarindus indica L.) dan Marasi (Hymeneae courbaril L.) The Influence of Steaming and Soaking in NaOH to Bending of Rasamala (Altingia excelsa Noronha), Java Tamarind (Tamarindus indica L.) and Marasi (Hymeneae courbaril L.)Wood Jamaludin Malik; K. Yuniart; Jasni Jasni; O. Rachman
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 2 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Wood bent has been observed on three wood species from forest people plantation, i.e. Rasamala (Altingia excelsa Noronha), Java Tamarind (Tamarindus indica L.) and Marasi (Hymenaea courbaril L.), through steaming and soaking in 3% NaOH pre-treatment.The results showed that pre-treatment by soaking in 3% NaOH for 7 days continued by steaming for 30 minutes at temperature of 105 + 3ºC, could increase bent ability of each wood as follows: Rasamala 124%, Marasi 41% and Java Tamarind wood 13%, compared to bent ability of these woods with steaming treatment only. The Rasamala wood has bigger bent-radius or more difficult to be bent than the two others. Bending radius and increasing of wood bending of wood with high specific gravity is lower than wood with low the specific gravity

Aplikasi Panas sebagai Alternatif untuk Mengawetkan Kayu Heat Treatment as an Alternative for Wood Preservation Jasni Jasni; Pipin Permadi; Didik A. Sudika; Rusti Rushelia
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 1 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Most of Indonesian wood species are classified as less durable, so preservation is needed. Wood preservation inIndonesiamainly depends on imported preservatives. The preservatives are not only toxic to wood destroying organism but also to humans and the environments. Therefore alternative to treat wood should be sought and developed in term of the preservatives used as well as the methods. One that can be proposed is treating wood at high temperature combine with environmentally friendly preservatives, as tried in this experiment.The wood species used in this experiment were rubber wood (Hevea brasilliensis) and pine (Pinus merkusii). Both woods were treated with borax at two concentrations (3% and 5%) by cold-soaking method for 24 hours. The treated woods were subsequently air dried. Then those woods were treated at three levels of high temperature (180ºC, 200ºC, and 220ºC) in an oven for one hour. Finally, the treated wood samples were laboratory-tested by assessing their resistance to dry wood termites (Cryptotermes synocephalus Light.) and powder-post beetles (Heterobostrychus aequalis Wat).The results revealed that increases of heating temperature and concentration of preservatives resulted in more durable woods. In this regard their resistance to dry wood termite and powder-post beetles was increased as shown by smaller weight loss. Treating wood at temperature of 180ºC combined with borax at concentration of 3% resulted in 100% termite mortality on rubber wood and pine.

PENGARUH PRAPERLAKUAN BAHAN BAKU TERHADAP KUALITAS PAPAN LAMINA ROTAN Adi Santoso; Gustan Pari; Krisdianto Krisdianto; Karnita Yuniarti; Jasni Jasni; Heru Wibisono
Jurnal Penelitian Hasil Hutan Vol 40, No 2 (2022): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2022.40.2.105–114

Rotan berpotensi dikembangkan menjadi produk komposit dengan teknologi perekatan menjadi rotan lamina. Namun sebagai bahan baku, rotan memiliki kelemahan, yakni mengandung komponen kimia yang bersifat menghambat ikatan perekat dengan molekul-molekul kimia rotan. Upaya mengatasi hal tersebut, dilakukan teknik penyempurnaan pembuatan rotan komposit guna memperoleh data efek perlakuan pendahuluan pada rotan sebagai bahan baku. Rotan sebagai bahan baku terlebih dahulu dikeringkan dengan gelombang mikro, penguapan hidrothermal dan cara konvensional guna menurunkan kadar komponen kimia penghambat perekatan yang terkandung dalam rotan. Tulisan ini menyajikan hasil penelitian tentang teknologi pembuatan rotan lamina dari jenis Batang (Calamus zolingerii) berdiameter besar (>20 mm) dengan perekat tanin mangium. Hasil penelitian menunjukkan perlakuan pendahuluan pada rotan sebagai bahan baku berupa pengeringan dengan cara oven, steam, penggorengan, hidrothermal, dan gelombang mikro, masing-masing menghasilkan efek yang berbeda terhadap komponen kimia yang terkandung dan derajat kristalinitasnya. Papan lamina rotan terbaik diperoleh dari rotan yang diberi perlakuan pendahuluan menggunakan gelombang mikro oven 1 kW (input) dengan kekuatan energi maksimum 50%.

PENGARUH PRAPERLAKUAN BAHAN BAKU TERHADAP KUALITAS PAPAN LAMINA ROTAN Adi Santoso; Gustan Pari; Krisdianto Krisdianto; Karnita Yuniarti; Jasni Jasni; Heru Wibisono
Jurnal Penelitian Hasil Hutan Vol 40, No 2 (2022): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2022.40.2.105–114

Rotan berpotensi dikembangkan menjadi produk komposit dengan teknologi perekatan menjadi rotan lamina. Namun sebagai bahan baku, rotan memiliki kelemahan, yakni mengandung komponen kimia yang bersifat menghambat ikatan perekat dengan molekul-molekul kimia rotan. Upaya mengatasi hal tersebut, dilakukan teknik penyempurnaan pembuatan rotan komposit guna memperoleh data efek perlakuan pendahuluan pada rotan sebagai bahan baku. Rotan sebagai bahan baku terlebih dahulu dikeringkan dengan gelombang mikro, penguapan hidrothermal dan cara konvensional guna menurunkan kadar komponen kimia penghambat perekatan yang terkandung dalam rotan. Tulisan ini menyajikan hasil penelitian tentang teknologi pembuatan rotan lamina dari jenis Batang (Calamus zolingerii) berdiameter besar (>20 mm) dengan perekat tanin mangium. Hasil penelitian menunjukkan perlakuan pendahuluan pada rotan sebagai bahan baku berupa pengeringan dengan cara oven, steam, penggorengan, hidrothermal, dan gelombang mikro, masing-masing menghasilkan efek yang berbeda terhadap komponen kimia yang terkandung dan derajat kristalinitasnya. Papan lamina rotan terbaik diperoleh dari rotan yang diberi perlakuan pendahuluan menggunakan gelombang mikro oven 1 kW (input) dengan kekuatan energi maksimum 50%.

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