scholarly journals Density and Ultrasonic Characterization of Oil Palm Trunk Infected by Ganoderma Boninense Disease

2011 ◽  
Vol 11 (5) ◽  
Author(s):  
M. Najmie ◽  
K. Khalid ◽  
A. Sidek ◽  
M. Jusoh
Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1007 ◽  
Author(s):  
Arif Nuryawan ◽  
C. Abdullah ◽  
Che Hazwan ◽  
N. Olaiya ◽  
Esam Yahya ◽  
...  

Using oil palm trunk (OPT) layered with empty fruit bunch (EFB), so-called hybrid plywood enhanced with palm oil ash nanoparticles, with phenol-formaldehyde (PF) resin as a binder, was produced in this study. The phenol-formaldehyde (PF) resins filled with different loading of oil palm ash (OPA) nanoparticles were prepared and used as glue for layers of the oil palm trunk (OPT) veneer and empty fruit bunch fibre mat. The resulting hybrid plywood produced was characterised. The physical, mechanical, thermal, and morphological properties of the hybrid plywood panels were investigated. The results obtained showed that the presence of OPA nanoparticles significantly affected the physical, mechanical, and thermal properties of the plywood panels. Significant improvements in dimension from water absorption and thickness swelling experiments were obtained for the plywood panels with the highest OPA nanoparticles loading in PF resin. The mechanical properties indicated that plywood composites showed improvement in flexural, shear, and impact properties until a certain loading of OPA nanoparticles in PF resin. Fracture surface morphology also showed the effectiveness of OPA nanoparticles in the reduction of layer breakage due to force and stress distribution. The thermal stability performance showed that PF filled OPA nanoparticles contributed to the thermal stability of the plywood panels. Therefore, the results obtained in this study showed that OPA nanoparticles certainly improved the characteristic of the hybrid plywood.


2020 ◽  
Vol 12 (6) ◽  
pp. 2468
Author(s):  
Sunday Yusuf Kpalo ◽  
Mohamad Faiz Zainuddin ◽  
Latifah Abd Manaf ◽  
Ahmad Muhaimin Roslan

The objective of this research was to investigate the quality of hybrid briquettes developed from corncobs (CC) and oil palm trunk bark (OPTB) under a low-pressure densification technique. The materials were combined in varying ratios of CC to OPTB (100:0, 75:25, 50:50, 25:75, 0:100) and wastepaper pulp (10% by weight) was added to each mixture as a binder. The briquettes were produced using a manually operated 20-tonne hydraulic piston press at 28 °C temperature and ≤7 MPa compaction pressure. The mechanical strength of the briquettes was determined by the drop test and compression test methods, while a bomb calorimeter was used to determine the calorific values. The results showed that the physical properties of hybrid briquettes ranged from 9.24–10.00% moisture content, 0.38–0.40 g/cm3 density, and 87.60%–92.00% water resistance. Mechanical strength showed a 98.28%–99.08% shatter index and 18.47–21.75 MPa compressive strength, while calorific values ranged from 16.54–16.91 MJ/kg. The hybrid briquettes fared better than the CC briquettes. The significance of this study lies in the production of briquettes with suitable physical, mechanical and thermal properties by utilizing OPTB which have hitherto not been used, mixed with corncobs. This could bring substantial environmental and socio-economic benefits to rural communities of the developing countries.


2009 ◽  
Vol 55 (6) ◽  
pp. 346-355 ◽  
Author(s):  
Kosuke Murai ◽  
Ryuichiro Uchida ◽  
Atsushi Okubo ◽  
Ryuichiro Kondo

2021 ◽  
Author(s):  
Fahmi Fathurrahman Miranda ◽  
Aristawati Sekar Putri ◽  
Mega Mustikaningrum ◽  
Ahmad Tawfiequrrahman Yuliansyah

2019 ◽  
Vol 10 (1) ◽  
pp. 45-55
Author(s):  
Nadly Aizat Nudri ◽  
Robert Thomas Bachmann ◽  
Wan Azlina Wan Abdul Karim Ghani ◽  
Denny Ng Kok Sum ◽  
Atiyyah Ameenah Azni
Keyword(s):  
Oil Palm ◽  

2016 ◽  
Vol 37 (12) ◽  
pp. 1550-1558 ◽  
Author(s):  
Kok Chang Lee ◽  
Takamitsu Arai ◽  
Darah Ibrahim ◽  
Lan Deng ◽  
Yoshinori Murata ◽  
...  
Keyword(s):  
Oil Palm ◽  

Holzforschung ◽  
1999 ◽  
Vol 53 (3) ◽  
pp. 253-260 ◽  
Author(s):  
R. Sun ◽  
J.M. Fang ◽  
L. Mott ◽  
J. Bolton

Summary The polysaccharides in oil palm trunk fibre and empty fruit bunch (EFB) fibre were fractionated into cold water solubles, hot water solubles, 1% NaOH solubles, and 17.5% NaOH soluble fractions. Cellulose (approximately 42%) and hemicelluloses (approximately 33%) were the major polysaccharides in the palm trunk fibre and EFB fibre. Extractions of the lignified fibres with cold water, hot water, and 1% NaOH produced the hemicellulosic fractions, which were enriched in xylose and glucose and to a lesser extent, arabinose-, galactose-, mannose-, rhamnose-, and ribose-containing polysaccharides, together with noticeable amounts of associated lignin (4.5–31.2%). Further extraction of the delignified fibre residues with aqueous 17.5% NaOH removed the hemicellulosic fractions, which were strongly enriched in xylose-containing polysaccharides and relatively free of associated lignin (0.3–0.7%). Eight phenolic acids and aldehydes, including p-hydroxybenzoic acid, p-hydroxybenzaldehyde, vanillic acid, syringic acid, vanillin, syringaldehyde, p-coumaric acid, and ferulic acid, were detected in the mixtures of alkaline nitrobenzene oxidation of associated lignin in all the sixteen polysaccharide fractions. The results obtained showed that hemicelluloses in the cell walls of oil palm trunk and EFB fibres, are mainly bonded with lignin by syringyl units.


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