Garuda - Garba Rujukan Digital

KETEGUHAN REKAT DAN EMISI FORMALDEHIDA PAPAN LAMINA ROTAN MENGGUNAKAN PEREKAT TANIN FORMALDEHIDA Rohmah Pari; Abdurachman; Adi Santoso
Jurnal Penelitian Hasil Hutan Vol. 37 No. 1 (2019): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2019.37.1.33-41

Composite products made of rattan have a decorative value and potentially can be developed for current market demand. Rattan laminated board is expected to perform effective as a substitution material for wooden furniture. The aim of this research is to determine technology of making laminated rattan board from large rattan species which having diameter of more than 30 mm using phenol based adhesive from organic resources, i.e. bark (mangium, mahoni) and merbau sawdust. The laminated rattan board sizing of 1.5 cm x 7.5 cm x 90 cm were made of five layers which spreaded on one side of the surface and hot pressed with 10 kg/cm2 specific pressure for three hours. Testing of rattan laminated board products includes bonding strength and formaldehyde emissions, and also the bonding strength value of samples from the National Rattan Innovation Center (PIRNas) as a comparison. Results show that bonding strength and formaldehyde emissions of the rattan laminated board was influenced by interaction type of tannin-formaldehyde, pressing temperature, and glue spread. The best quality adhesive performance of rattan boards was obtained on the use of tannin-formaldehyde mangium resin with formaldehyde emissions with a glue spread of 200 g/m2 surfaces and 100oC pressing temperature, with formaldehyde emmision within the safe limits. Approximately 28% of the experimental rattan laminated boards possessed bonding strength which exceeds bonding strength value of the PIRNas board, which used synthetic resin based on the imported phenolic adhesive.

PENENTUAN DAN APLIKASI FORMULA PEREKAT NABATI DARI EKSTRAK KULIT KAYU MAHONI PADA LAMINASI KAYU JABON Abdurachman; Adi Santoso; Rohmah Pari
Jurnal Penelitian Hasil Hutan Vol. 39 No. 2 (2021): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2021.39.2.99-105

The domestic need for phenolic-based wood adhesives is high, but the material is currently imported, then altenative adhesivesare needed. This paper studies the characteristics of mahogany tannins and effective formulation of alternative adhesives made frommahogany bark extracts of mixture tapioca flour and industrial flour as extender applied to composite or glued products. The barkof mahogany was cut to the size of 2 cm x 1 cm x 0.1 cm, extracted with hot water (70–80°C) with a ratio of 1:3 (w/w,material/water) for 3 hours with two repetitions. After extraction product was filtered, and the filtrate was copolymerized usingresorcinol and formaldehyde under alkaline and room temperature conditions to produce resin tannin resorcinol formaldehyde(TRF). The blend of tapioca flour and industrial flour (1:1, w/w) as an extender was used in the TRF application to manufacturecomposite products. The results showed that this mahogany bark liquid extract could be copolymerized to form a resin which thenapplied as a wood adhesive in a cold pressing process. The optimum adhesive formula was a mixture of 0.25 mol of resorcinol and1-mol formaldehyde, with a 15% extender, and a catalyst (NaOH 40%) of 4% of the total weight of the adhesive formulation.The characteristics of mahogany tannin adhesives resemble those of the exterior type phenolic group.

KLASIFIKASI MUTU 11 JENIS ROTAN INDONESIA BERDASARKAN KERAPATAN DAN KETEGUHAN LENTUR Rohmah Pari; Abdurachman; Jasni; Titi Kalima
Jurnal Penelitian Hasil Hutan Vol. 36 No. 1 (2018): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2018.36.1.13-22

Rattan is a lignocellulose plant that can be used for furmiture and other handicraft product. Quality and characteristics of the rattan species should be identified to comply with their utilization purposes. This research aimed to study the quality classification of 11 less used rattan species from Kalimantan, Sulawesi and Sumatera based on their physical properties (density) and mechanical properties (bending strength). The testing method applied was modified from ASTM D143-94. This modification was carried out because the formula used in ASTM is for square cross-section while rattan has cylindrical cross-section. The study of 11 species of rattan, based on the physical and mechanical properties, showed that three species of rattan from Kalimantan were classified in to class II – I (Calamus lobbianus), class III (Daemonorops fissa) and class IV – III (C. marginatus), while the three species of rattan from Sulawesi were grouped in to class I (C. robinsonianus), class II (C. scleracanthus) and class II – III (C. mindorensis). The remaining five species of rattan from Sumatera were categorized in class I – II (C. rugosus), class II – I (C. spectatissimus), class I – III (D. longipes), class II – III (D. verticillaris), and class III (D. sepal). These results could be used as a consideration for utilization of high quality rattan for furniture material that hold heavy load while low quality rattan may be used for holding light load only.

KETAHANAN ALAMI JENIS-JENIS BAMBU YANG TUMBUH DI INDONESIA TERHADAP RAYAP TANAH (Coptotermes curvignathus Holmgren) Jasni; Ratih Damayanti; Rohmah Pari
Jurnal Penelitian Hasil Hutan Vol. 35 No. 4 (2017): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.4.289-301

Natural durability of each bamboo species is different, thus information on natural durability of bamboo species is important for its utilization. This paper investigates the natural resistance of bamboo species against subterranean termites as a basis for species classification. Twenty species of bamboo from various regions in Indonesia (West Java, Banten, the Central of Java, Lampung and Bogor Botanical Garden) were tested against subterranean termites Coptotermes curvignathus Holmgren according to SNI 7204-2014. Parameters observed were weight loss percentage of bamboo, survival rate of the termites and degree of attack (subjectively). Results showed that based on the weight loss, three bamboo species could be grouped into resistance class I, five species into class II, three species into class III, seven species as class IV and two species as class V. Based on the survival rate of the termites, one of the bamboo species was classified in class I, four species in class II, one species in class III, 11 species in class IV, and three species in class V. Furthermore, according to the degree of attack, four species were heavily damaged, while 16 species showed moderately damage. From the result, it can be concluded that one species of bamboo namely apus (Gigantochloa apus) has the highest resistance class (class I), and four other species of bamboo namely hitam (G. atroviolacea), kuring (G. kuring), india/tulda (Bambusa tulda) and lemang (Schizostachyum brachycladum), were classified in resistance class II. In the utlization, the five species of bamboo can be used without preservation, while the remaining 15 species of bamboo in resistance class III V should be preserved before using.

SIFAT FISIS DAN PENGERINGAN LIMA JENIS BAMBU Efrida Basri; Rohmah Pari
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.2017.35.1.1-13

Information regarding physical properties of bamboo is essential for interpreting its dimensional stability, while drying properties are needed as a basis in determining the optimum drying temperature. This research was aimed to investigate the effect of bamboo species and position at the culm on physical properties, as well as drying properties of five bamboo species i.e. temen bamboo (Gigantochloa verticillata Munro), ori (Bambusa blumeana Bl. ex Schult.f.), ater (Gigantochloa atter (Hassk.) Kurz ex Munro), ampel (Bambusa vulgaris Schrad.), and peting (Gigantochloa levis (Blanco) Merr.). Physical properties were tested by measuring diameter and thickness of bamboo culms. Determination of drying temperature was carried out in accordance with wood drying method and followed by observing visual defects, i.e. deformation (concave & wrinkle) and end/node split. Assessment results revealed that there were close relationships between green moisture content of bamboo and their density as well as their culm shrinkage. Based on bamboo drying properties (bottom-middle portions), the optimum drying temperatures (initial and final temperature) for temen and ori were occurred at 45 – 70°C, ampel and ater were occurred at 40 – 60°C, while the optimum drying temperature for peting were at 33 – 50°C

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

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.

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