Investigation of a New Natural Particleboard Adhesive Composed of Tannin and Sucrose. 2. Effect of Pressing Temperature and Time on Board Properties, and Characterization of Adhesive

Abstract

In a previous study by the authors, particleboard was manufactured using a new natural adhesive composed of tannin and sucrose. The optimal ratio between tannin and sucrose was 25/75, and the suitable resin content was 30 to 40 wt%. In this study, the effects of hot pressing temperature and hot pressing time on board properties were investigated. The optimal values for the hot pressing temperature and hot pressing time were found to be 220 °C and 10 min, respectively. When the particleboard was made under these optimum conditions, the physical properties of the particleboard bonded with tannin and sucrose met the requirement of the JIS A 5908 type 18 standard (2003). Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), insoluble matter, and Fourier transform infrared spectroscopy (FT-IR) tests were carried out. The results of TGA and DSC measurements showed that the weight loss and endothermic reaction of the adhesive composed of tannin and sucrose at a ratio of 25/75 occurred at 204 and 215 °C, respectively. When the adhesive was heated at 220 °C for longer than 10 min, the level of insoluble matter was higher than 70 wt%. FT-IR analysis showed the existence of a furan ring, a carbonyl group, and dimethylene ether bridges in the cured adhesives before and after the boiling treatment. When the heating time was longer than 10 min, no further change of chemical structure was observed.

Investigation and Characterization of Synthesis Conditions on Sucrose-ammonium Dihydrogen Phosphate (SADP) Adhesive: Bond Performance and Chemical Transformation

“…The potential of this almost ubiquitous, the natural product as a chemical raw material has been extensively explored and widely used in the beverage and food industries [16][17][18]. Hence, we developed a series of sucrose-based wood adhesives, such as sucrose-citric acid [19,20], sucrose-tannin [21,22], and sucrose-acid-tannin adhesives [23], when considering the renewability and reactivity of sucrose. In these researches, sucrose and other soluble compounds were dissolved in the distilled water at room temperature and applied to manufacture the particleboard.…”

Manufacturing and Characterization of Composite Fibreboards with Posidonia oceanica Wastes with an Environmentally-Friendly Binder from Epoxy Resin

“…The current tendency is to avoid formaldehyde as it is considered a great pollutant [ 1 ], so that new formaldehyde-free binders are continuously being investigated. Most of them are derived from tannins [ 9 , 10 ], lignin [ 11 , 12 ], soy protein [ 13 , 14 , 15 ], etc. Although most of the commercial epoxies come from petroleum, in the last years, new environmentally-friendly epoxies from vegetable oils have been proposed as eco-friendly adhesives and composite matrices [ 16 , 17 , 18 ].…”

Mechanical and Physical Properties of Kelempayan (Neolamarckia Cadamba) Particleboard

“…Increase the curing of resin, in general, provided more effective bonding and in turn led to better IB of the board. A study by [32] found that the IB of particleboard was obviously enhanced as the hot press temperature increased. Figure 8 also illustrates the TS values of Kelempayan particleboards manufactured from variation of hot press temperature.…”