Characterization of wood-based molding bonded with citric acid

Abstract

The wood-based moldings were fabricated by using only citric acid as an adhesive. The mechanical properties, water resistances, thermal properties and chemical structure were investigated. Wood powder obtained from Acacia mangium was mixed with citric acid under certain weight ratios (0-40 wt%), and each powder mixture was molded using two types of metal molds at 200°C and 4 MPa for 10 min. The modulus of rupture and the modulus of elasticity values of the wood-based molding containing 20 wt% citric acid were 35.8 MPa and 5.4 GPa, respectively. The maximum impact strength was 0.94 kJ/m 2 with the same citric acid content. The water resistance increased with increasing citric acid content, and the good resistance to boiling water was also recognized. However, some elution of substances derived from citric acid was observed at high levels of citric acid, causing a decrease in the thermal properties. The ester linkages were detected by Fourier transform infrared spectroscopy, indicating that the citric acid reacted with the wood. Our results demonstrated that citric acid brought about good adhesiveness for fabricating the wood-based molding.

Low Density Sugarcane Bagasse Particleboard Bonded with Citric Acid and Sucrose: Effect of board density and additive content

“…The physical properties of the manufactured board with a density of 0.80 g/cm³ at 200 °C satisfied the type 18 requirements of the Japanese industrial standard for particleboard (JISA 5908) (Umemura et al 2012(Umemura et al , 2015.…”

“…The effects of citric acid content on the physical properties of wood-based mouldings were clarified by Umemura et al (2012) under fabricating conditions of 200 °C and 4 MPa for 10 min. The physical properties of the manufactured board with a density of 0.80 g/cm³ at 200 °C satisfied the type 18 requirements of the Japanese industrial standard for particleboard (JISA 5908) (Umemura et al 2012(Umemura et al , 2015.…”

Evaluation of Termite Resistance of Medium Density Fiberboard (MDF) Manufacture from Agricultural Fiber Bonded with Citric Acid

“…Citric acid (2-hydroxy-1,2,3-propane tri carboxylic acid) containing poly carboxylic acid [8] may explain greater durability of the MDF containing high citric acid. High citric acid content of MDF devastates the termites, consequently lower in weight losses.…”

“…Utilization of citric acid for wood composite particleboard manufacturing has been developed by Umemura et al [2]. Citric acid (2-hydroxy-1,2,3-propane tri carboxylic acid) is an organic poly carboxylic acid containing three carboxyl groups [8]. In addition, citric acid has been researched as across-linking agent for wood [9], plant fiber [10], paper [11], starch [12] and bio-based elastomers [13].…”

Sifat Fisika Mekanika dan Ketahanan Papan Partikel Bambu dengan Perekat Asam Sitrat terhadap Serangan Rayap Kayu Kering

“…Salah satu bahan pengaktif alami yang mulai dikembangkan adalah asam sitrat (2-hydroxy-1,2,3-propanetricarboxylic acid) yang mengandung tiga gugus karboksil dan terbukti dapat digunakan sebagai agen pengikat pada produk moulding dari kulit dan kayu akasia (Umemura et al, 2011 (Umemura et al 2011;2012 Gugus C=O ini juga dihasilkan oleh degradasi dari hemiselulosa selama proses pengempaan panas (Widyorini et al, 2005). Perbedaan intensitas gugus C=O pada dua suhu pengempaan pada penelitian ini tidak terlihat jelas pada spektrum FTIR.…”