Study On Properties Of Binderless,Particleboard From Oil Palm (Elaeis Guineensis) Biomass

Binderless panels were manufactured from the particles of bark, leaves, fronds, middlepart and core-part of oil palm trunks at two different target densities (0.8 g/cm3 and 1.0g/cm3) using two different pressures (5 MPa and 12 MPa). Binderless panels produced were tested for the physical and mechanical properties. Chemical analysis had also been conducted including determination of extractives, holocellulose, alpha-cellulose, lignin content, starch content, individual sugar, and total sugar content in oil palm fibers

Keterlarutan selulosa, pelarut dan produk selulosa yang dijana semula : suatu ulasan

Selulosa ialah polimer semula jadi yang boleh diperbaharui dan biasanya ditemui di dalam dinding sel tumbuhan. Interaksi hidrofobik yang kompleks serta sifat amfifilik menyebabkan ia sukar dilarutkan dan seterusnya membataskan penggunaannya secara menyeluruh. Pemahaman kepada struktur kimia dan fiziknya membolehkan proses pelarutan berlaku dengan penggunaan jenis pelarut yang bersesuaian. Namun, pelarut sedia ada bukanlah yang terbaik dan efisien terhadap pelarutan selulosa. Sehingga kini, kajian kepada jenis pelarut dan mekanisme pelarutan masih menjadi topik utama penyelidikan. Selulosa yang terlarut pula boleh dijana semula kepada produk fizikal yang lain, contohnya hidrogel, aerogel, kriogel dan xerogel. Produk yang dijana semula daripada selulosa yang terlarut boleh diacukan kepada pelbagai bentuk yang mempunyai struktur tulang yang kuat dan bersifat hidrofilik, bioserasi dan terbiodegradasi. Potensi dalam aplikasi yang pelbagai serta terbukti sebagai alternatif kepada polimer sintetik menjadikan polimer semula jadi ini berpotensi besar dalam bidang sains dan teknologi. Maka, ulasan kajian terhadap selulosa, jenis pelarut serta produk yang dijana semula daripadanya menjadi fokus dalam penulisan makalah ini

Physical and Mechanical Properties of Binderless Particleboard Made from Steam-Pretreated Oil Palm Trunk Particles

Formaldehyde emissions from conventional particleboards raise issues of health and safety. One of the potential solutions is binderless particleboards made without using synthetic adhesives. However, the physical and mechanical properties of untreated binderless particleboards are relatively poor compared to conventional particleboards. This research aims to reveal the potential of using steam pretreatment to improve binderless particleboard properties made from oil palm trunk. The oil palm trunk particles were treated with steam pretreatment for different durations of time (20, 40, 60 min). The chemical constituents of the treated and untreated particles were evaluated. The binderless particleboards were made from treated and untreated particles. In addition, panels using untreated oil palm trunk particles with 10% urea−formaldehyde resin were made and used as a comparison. The boards were evaluated according to European Standards. The results indicated that the hemicellulose and starch content gradually reduced with the progression of steam pretreatment. The physical and mechanical properties were improved by increasing steam pretreatment duration. The steam pretreatment was able to improve the properties of binderless particleboards made from oil palm trunk. However, the performance of steam-pretreated binderless particleboard in this study is not compatible with the particleboards made using 10% urea−formaldehyde

Mechanical properties and dimensional stability of particleboard fabricated from steam pre-treated banana trunk waste particles

This study investigated the mechanical strength and dimensional stability of steam pre-treated banana trunk waste trunck waste binderless (free from synthetic adhesive) particleboards. The dried banana trunk wastes particles were subjected to steam pre-treatment for 15 min at chosen temperatures of 111 °C, 121 °C, and 131 °C, respectively. The targeted density of the particle board was fixed around 0.7 g/cm3, to achieve this density of binderless particleboard the steamed banana particles were hot pressed at a temperature of 180 °C for 40 min. The obtained particleboard was tested for standard mechanical and physicochemical properties. The test results indicated that banana trunk waste particle after steam treated at 121 °C temperature resulting particleboard was having optimum modulus of rupture (MOR, 4.57 MPa) and modulus of elasticity (MOE, 662.33 MPa) compared to without steam treated banana trunk waste binderless particleboard (MOR, 1.54 MPa; MOE, 296.74 MPa) and other temperature steam treated banana trunk waste particleboard. The dimensional stability of steam pre-treated banana trunk waste particleboard was found to be improved due to a reduction in thickness swelling and water absorption properties. The physical and mechanical property of steam pre-treated banana trunk waste particleboard was found to be comparable with the standard particleboard properties issued by the Japanese Industrial Standards (JIS) A 5908:2003. The finding of this study shows that the banana trunk waste has potential to be used as raw material for the manufacture of binderless particleboard, which can be used in green buildings