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Jasni
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KUALITAS PAPAN LAMINA DENGAN PEREKAT RESORSINOL DARI EKSTRAK LIMBAH KAYU MERBAU Adi Santoso; Gustan Pari; Jasni
Jurnal Penelitian Hasil Hutan Vol. 33 No. 3 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.3.253-260

Abstract

Polyphenol chemical components extracted from merbau (Intsia spp.) wood exhibit a strong affinity for resorcinol and formaldehyde in alkaline conditions, forming a copolymer that could serve as an adhesive. This paper studies the use of resorcinol adhesives from merbau wood extracts containing poly phenolics which copolymerize with formaldehyde bonding wood laminates. Results show that copolymer of merbau extracts with formaldehyde could produce resin with molecular weight 49,658. The resin can be used as adhesive for laminated board manufacturing of a 3 ply-1 strip flooring parquet constructed with 7 wood species, i.e: sungkai, karet, kempas, merbau, mangium, mahoni and sengon. Bonding quality and physical-mechanical properties of the products laminated meet the same product that glued using imported adhesive and included exterior quality with E₀ or F**** types of low emission formaldehyde.
PENGKLASIFIKASIAN KETAHANAN JENIS BAMBU 20 TERHADAP RAYAP KAYU KERING Jasni; Ratih Damayanti; I.M. Sulastiningsih
Jurnal Penelitian Hasil Hutan Vol. 35 No. 3 (2017): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.3.171-183

Abstract

The resistance of twenty bamboo species from different regions of Indonesia were tested against drywood termites (Cryptotermes cynocephalus Light.). Each bamboo species was cut into dimension of 5 cm × 2.5 cm × 1 cm. The test was conducted according to SNI 7207-2014. Parameters mass loss percentage of bamboo, survival rate of the termites, and degree of attack (subjectively) were observed as the basic to classify the resistance of bamboo against drywood termites. According to the mass loss percentage, the bamboo species were assigned into five groups: two bamboo species as resistance class I, six bamboo species as class II, five bamboo species as class III, four bamboo species as class IV, and three bamboo species as class V. Based on the survival rate of the termites, the natural resistance of bamboo could be assigned into five groups: two bamboo species as resistance class I, one species as class II, ten bamboo species as class III, five bamboo species as class IV, and two bamboo species as class V. The classification according to the degree of attack showed that two bamboo species experienced severely attack (38 - 40.5% / score 90), while the rest eighteen bamboo species had medium attack (18.4 - 34.9% / score 70).
SIFAT BALOK KOMPOSIT KOMBINASI BAMBU DAN KAYU Abdurachman; Nurwati Hadjib; Jasni; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.115-124

Abstract

Combination of bamboo and wood composite beam is one possible laminated product to be developed. Generally, the composite product of solid wood meet the strength requirement for construction. However, composite beam combination of bamboo and wood has not been studied intensively. This paper observes the properties of composite combination of three bamboo species: andong, petung and ori with jabon wood species using isocyanate glue and merbau extracts. In order to improve composite’s durability, bamboo and jabon wood were preserved using 7% of boric acid and borax. Result shows composite beam combination of bamboo and jabon wood bonded with isocyanate is found to be the best composition in term of physical and mechanical properties. The density of the composite beam is 0.64 g/cm³ in 9.70% moisture content. Modulus of Elasticity (MOE) 78,168 kg/cm², Modulus of Rupture (MOR) 384 kg/cm² and compression parallel to the glue line is 378 kg/cm².
KETAHANAN 20 JENIS KAYU TERHADAP SERANGAN RAYAP TANAH (Coptotermes curvignathus Holmgren) dan RAYAP KAYU KERING (Cryptotermes cynocephalus Light) Jasni; Sri Rulliaty
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.125-133

Abstract

This study aims to determine the resistance of 20 wood species against subterranean termites (Coptotermes curvignathus Holmgren) and dry wood termites (Cryptotermes cynocephalus Light). The test method of subterranean and dry wood termites refers to the SNI 01-7207-2006. Parameters observed for determining resistance class to subterranean and dry wood termites are the percentage of wood weight loss and the survival percentage of termites. Besides that, a subjective observation an severity of subterranean and dry wood termites attacks were also conducted. Results show that the resistance of 20 wood species against subterranean termites are as follow: class II (3 wood species), class III (2 wood species), class IV (13 wood species) and class V (2 wood species). The resistance to dry wood termites of the 20 wood studied species can be grouped as follow: class I (4 wood species), class II (5 wood species), class III (8 wood species) and classIV (3 wood species).
PENGGOLONGAN 23 JENIS ROTAN INDONESIA BERDASARKAN KERAPATAN DAN KUAT TARIK SEJAJAR SERAT Abdurachman; Jasni; Rohmah Pari; Esti Rini Satiti
Jurnal Penelitian Hasil Hutan Vol. 35 No. 1 (2017): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.1.43-52

Abstract

Rattan utilization is mainly determined by its physical and mechanical characteristics of density and tensile strength, where the higher the physical and mechanical properties, the better quality of the cane. In South East Asia region including Indonesia, two of eight genera, Calamus and Daemonorops are classified into high economic value, however the physical and mechanical characteristic of lesser known rattan species has not been studied intensively. This paper classifies 23 of lesser known rattan species into four classes based on its density and tensile strength parallel to grain. Density was measured based on gravimetric method and tensile strength parallel to grain was tested using Universal Testing Machine (UTM). Results show that in term of physical and mechanical properties, one species belongs to class I (very good), twelve species are classified into class II(good) and III (moderate). Ten rattan species are grouped into class IV (poor). Among 23 rattan species, highly recommended commercial rattan species are Calamus holttumii Furt., Calamus nematospadix Becc., and Korthalsia celebica Becc. While, Calamus sp., Korthalsia rostrata Blume and Daemonorops sabut Becc are less recommended.
KOMPOSISI KIMIA DAN ALAMI 20 KEAWETAN JENIS KAYU INDONESIA DENGAN PENGUJIAN DI BAWAH NAUNGAN Jasni; Gustan Pari; Esti Rini Satiti
Jurnal Penelitian Hasil Hutan Vol. 34 No. 4 (2016): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2016.34.4.323-333

Abstract

Wood utilization for various products such as building construction, furniture and handycrafts deserves through attention to the properties such as chemical composition and durability, as those are interrelated. This paper investigates chemical composition and natural durability of 20 wood species originated from several Indonesian regions. Celluloses content was analyzed according to Norman and Jenkin methods; lignins content was tested according to SNI 14-0492 1989; and extractives content was analysed based on SNI 14-1032-1989. Testing of wood durability was conducted under the shade at Cikampek, experiment station, West Java. Durability observation was conducted in one year afterwards by assessing the percentage damage of wood samples caused by wood-destroying organisms. Results show that jaha wood (Terminalia arborea K.et.V.) exhibited the highest cellulose content (61.35%), while the lowest (43.30%) at bambang lanang wood (Michelia champaca L.var.pubinervia). Mahang putih wood (Macaranga hypoleuca Muell. Arg.) contain the highest lignin (35.80%), conversely cempaka wood (Elmerrillia papuana Dandy) contain the lowest lignin (23.67%). The highest extractive content (7.87%) was found at bawang wood (Azadirachta exelsa (Jack) M. Jacobs), while the lowest content found at kandis wood (Pentaphalangium pachycarcum A.C. Smith.) with extractive content of 1.52%. Assessment on natural durability indicated that four species were categorized as durable (class II), six species as rather durable (class III), three species as not-durable (class IV), and seven species as perishable (class V).
Co-Authors Abdurachman ADI SANTOSO Esti Rini Satiti Gunawan Pasaribu Gustan Pari Heru S. Wibisono Heru Wibisono I.M. Sulastiningsih Jamal Balfas Karnita Yuniarti Krisdianto Nurwati Hadjib Ratih Damayanti Rohmah Pari Santiyo Wibowo Sri Rulliaty Titi Kalima Wa Ode Muliastuty Arsyad