Composite Panels from Underutilized Wood and Agricultural Fiber Resources

2013 ◽  
Vol 747 ◽  
pp. 391-394
Author(s):  
Salim Hiziroglu
Keyword(s):  
Rice Straw ◽  
Medium Density Fiberboard ◽  
Value Added ◽  
Raw Material ◽  
Composite Panels ◽  
Medium Density ◽  
Eastern Redcedar ◽  
Agricultural Resources ◽  
Fiber Oil ◽  
The Usa

Rice straw, jute, coconut fiber, oil palm, bagasse and bamboo are some of agricultural resources that can be used to produce different types of value-added composite panels including particleboard and medium density fiberboard (MDF). Invasive species such as Eastern redcedar in South Western states in the USA would also be considered as viable raw material to manufacture above products. The main objective of this study was to review basic properties of both structural and non-structural panels manufactured from underutilized and agricultural species. Eastern redcedar, bamboo and rice straw were used to manufacture experimental panels. Properties of such samples including bending, internal bond strength, thickness swelling, and surface roughness were evaluated. Panels made 100% bamboo had the best properties among the other samples. Having rice straw in particleboard and medium density fiberboard panels reduced overall properties of the samples. Based on the findings of this work such species could have potential to be used as raw material to manufacture value-added panels with accepted properties.

Research about the Crackle-Simulated Coating Technology Applied in the Rice-Straw Board Furniture Surface Decorating

2011 ◽  
Vol 295-297 ◽  
pp. 1693-1698
Author(s):  
Xian Qing Xiong ◽  
Zhi Hui Wu
Keyword(s):  
Reference Frame ◽  
Rice Straw ◽  
Medium Density Fiberboard ◽  
Economic Cost ◽  
Medium Density ◽  
Coating Technology ◽  
Environmental Friendliness ◽  
Coating Surface

Under certain conditions, a test about the crackle-simulated coating technology of rice-straw board after sanding its surface, which aims to determinate several indexes include the glossiness of the coating surface, the hardness and adhesion of the film, the ability to resist of denaturing, and the feel of the surface, etc. The result shows that: the technology of rice-straw board crackle-simulated coating is available to the medium density fiberboard furniture. Though the indexes of the hardness and adhesion of the film are slightly low, they are all up to the standard of the nation and the enterprise. Moreover, we have also analyzed the decorating effect of the crackle-simulated coating of the surface, the economic cost, the environmental friendliness and other elements, in order to provide a reference frame to the special coating which is conducted on the furniture surfaces.

scholarly journals UTILIZATION OF PINUS RESINATED Oversize FIBERS IN PRODUCTION OF PARTICLEBOARDS

2019 ◽  
Vol 43 (5) ◽  
Author(s):  
Morgana Cristina França ◽  
Alexsandro Bayestorff da Cunha ◽  
Caio Cesar Faedo de Almeida ◽  
Bruna Laís Longo ◽  
Willian Grubert
Keyword(s):  
Dimensional Stability ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Raw Material ◽  
Formaldehyde Resin ◽  
Medium Density ◽  
Technical Feasibility ◽  
Pressing Cycle ◽  
Nominal Density ◽  
Pinus Spp

ABSTRACT The objective of this study was to evaluate the technical feasibility of producing particleboard from oversize resin fibers in a reduced proportion of adhesive. It was used as raw material, oversize resin fibers discarded from the MDF (Medium Density Fiberboard) production process, flake particles of Pinus spp. derived from an MDP (Medium Density Particleboard) company’s chipper and adhesive formed by the urea-formaldehyde resin and paraffin emulsion. The experiment consisted of five treatments, mixing particles and fibers in different proportions (100: 0%; 75: 25%; 50: 50%; 25: 75%; 0: 100%). Three panels were produced per treatment, with nominal density of 650 kg.m-3, 8% resin and pressing cycle of 160ºC, 40 kgf.cm-2 for 8 minutes. The properties of the panels were evaluated by the procedures described in ASTM D-1047 (1993), DIN 53362 (1982) and ABNT / NBR 14810 (2013). The results showed that oversize resin fibers have potential for use in the sector, especially in quantities above 75%, a fact that was evidenced by the values found for dimensional stability and strength/stiffness. For internal adhesion, the increase in the number of fibers above 25% was not significant.

scholarly journals The Removal of Cured Urea-Formaldehyde Adhesive towards Sustainable Medium Density Fiberboard Production: A Review

2021 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Muhammad Adly Rahandi Lubis ◽  
Sumit Yaday Manohar ◽  
Raden Permana Budi Laksana ◽  
Widya Fatriasari ◽  
Maya Ismayati ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Hydrolytic Stability ◽  
Solid Wood ◽  
Wood Products ◽  
Raw Material ◽  
Medium Density ◽  
Engineered Wood ◽  
Recycled Fibers

Medium density fiberboard (MDF) is an engineered wood product that has density and specific gravity similar to solid wood, ranging from 600 to 800 kg/m3 of density and 0.6 to 0.8 of specific gravity. This makes MDF suitable to partially replace solid wood, particularly for interior application. Approximately over than 100 million m3 of MDF are produced in 2020, resulting in a large amount of waste MDF will be generated in the next 20 years. MDF is produced using urea-formaldehyde (UF) resins adhesive. UF resins adhesive is a poly-condensation product of urea and formaldehyde via an alkaline acid two-step reaction. Sustainable MDF production is required as the world is facing climate change and deforestation. Recycling is a way to support sustainable production in the engineered wood products manufacturing. Many attempts have been done to find ways to recycle waste MDF. The main problem is UF resins, which bond the MDF panel fibers. In order to re-manufacture the waste MDF into new recycled MDF, UF resins should be eliminated from the waste MDF before being used. The presence of UF resins in MDF can interfere with the utilization of the recycled fibers, whether it will be used as a raw material for new MDF or other composite products. This paper reviews the process of removal of cured UF resins from waste MDF panel by considering the hydrolytic stability of cured UF resins for MDF recycling, providing a comprehensive review of how cured UF resins can be removed from waste MDF and characterization of recycled fibers obtained from recycling prior to re-manufacturing of recycled MDF panel.Keywords: hydrolysis, medium density fiberboard, resin, recycling, resin removal, urea-formaldehyde

Oxalic acid pretreatment of rice straw particles and loblolly pine chips: Release of hemicellulosic carbohydrates

TAPPI Journal ◽  
2011 ◽  
Vol 10 (5) ◽  
pp. 41-45 ◽  
Author(s):  
XIANJUN LI ◽  
ZHIYONG CAI ◽  
ERIC HORN ◽  
JERROLD E. WINANDY
Keyword(s):  
Oxalic Acid ◽  
Mechanical Strength ◽  
Rice Straw ◽  
Loblolly Pine ◽  
Medium Density Fiberboard ◽  
Treatment Temperature ◽  
Wood Chips ◽  
Medium Density ◽  
Acid Pretreatment ◽  
Biobased Chemicals

This study was conducted to evaluate the effect of oxalic acid (OA) pretreatment on carbohydrates released from rice straw particles and wood chips. The results showed that OA treatment accelerated carbohydrates extraction from rice straw particles and wood chips. OA pretreatment dramatically increased the amount of carbohydrates extracted, up to 24 times for wood chips and 2.3 times for rice straw particles. Sugars released from the OA-treated rice straw particles and wood chips increased with increasing treatment temperature and duration. OA treatment also improved the primary physical properties of rice straw particleboard and wooden medium density fiberboard (MDF), except for the mechanical strength of MDF. Carbohydrates extracted from rice straw particles and wood chips could be a potential sustainable resource for biofuel or biobased chemicals.

The Effect of Thickness of Medium Density Fiberboard Produced of Hardwood Tree Species on their Selected Physical and Mechanical Properties

2016 ◽  
Vol 688 ◽  
pp. 115-121
Author(s):  
Liliana Valcheva ◽  
Viktor Savov
Keyword(s):  
Tree Species ◽  
Medium Density Fiberboard ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Medium Density ◽  
Scientific Experiments ◽  
Fagus Silvatica ◽  
Turkey Oak ◽  
Hardwood Tree ◽  
Characteristic Features

In Bulgaria, there is sufficient raw material as well as established technologies for fiberboard production of hardwood tree species. In general, MDF production from such raw-material is characterized by a number of technological difficulties mainly related to low compression ratio and smaller slenderness of fiber elements. The presented scientific experiments cover characteristic features and the effect of different thicknesses on the production of MDF from hardwood tree species – beech (Fagus silvatica L) and Turkey oak (Quercus cerris L). The experimental matrix and regime factors of hot-pressing are in correlation with thicknesses of boards. The regression models describing the effect of thicknesses on main properties of medium-density fiberboard are deduced and analyzed from the output data and the proper conclusions are made.

scholarly journals β-Galactosidases from a Sequence-Based Metagenome: Cloning, Expression, Purification and Characterization

2020 ◽  
Vol 9 (1) ◽  
pp. 55
Author(s):  
María Florencia Eberhardt ◽  
José Matías Irazoqui ◽  
Ariel Fernando Amadio
Keyword(s):  
Bacterial Species ◽  
Value Added ◽  
Raw Material ◽  
Activity Levels ◽  
Treatment Technology ◽  
Catalytic Domains ◽  
Stabilization Ponds ◽  
Cazy Database ◽  
Genes Encoding ◽  
Value Added Products

Stabilization ponds are a common treatment technology for wastewater generated by dairy industries. Large proportions of cheese whey are thrown into these ponds, creating an environmental problem because of the large volume produced and the high biological and chemical oxygen demands. Due to its composition, mainly lactose and proteins, it can be considered as a raw material for value-added products, through physicochemical or enzymatic treatments. β-Galactosidases (EC 3.2.1.23) are lactose modifying enzymes that can transform lactose in free monomers, glucose and galactose, or galactooligosacharides. Here, the identification of novel genes encoding β-galactosidases, identified via whole-genome shotgun sequencing of the metagenome of dairy industries stabilization ponds is reported. The genes were selected based on the conservation of catalytic domains, comparing against the CAZy database, and focusing on families with β-galactosidases activity (GH1, GH2 and GH42). A total of 394 candidate genes were found, all belonging to bacterial species. From these candidates, 12 were selected to be cloned and expressed. A total of six enzymes were expressed, and five cleaved efficiently ortho-nitrophenyl-β-galactoside and lactose. The activity levels of one of these novel β-galactosidase was higher than other enzymes reported from functional metagenomics screening and higher than the only enzyme reported from sequence-based metagenomics. A group of novel mesophilic β-galactosidases from diary stabilization ponds’ metagenomes was successfully identified, cloned and expressed. These novel enzymes provide alternatives for the production of value-added products from dairy industries’ by-products.

scholarly journals Calcium carbonate modified urea–formaldehyde resin adhesive for strength enhanced medium density fiberboard production

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 25010-25017
Author(s):  
Li Lu ◽  
Yan Wang ◽  
Tianhua Li ◽  
Supeng Wang ◽  
Shoulu Yang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Medium Density ◽  
Ionic Bond ◽  
Resin Adhesive ◽  
Uf Resin ◽  
Modified Urea

Reactions between CaCO3 and CH2O2 during polycondensation of UF resin produce Ca2+. Ionic bond complexation binds Ca2+ with UF resin. The UF resin crystalline percentage decreases from 26.86% to 22.71%. IB strength of resin bonded fiberboard increases from 0.75 to 0.94 MPa.

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