INVESTIGADORES
MARTUCCI josefa Fabiana
artículos
Título:
Bonding Quality of Chemically Modified Soybean Protein Concentrate Based Adhesives in Particleboards from Rice Husks
Autor/es:
E.M. CIANNAMEA; J. F. MARTUCCI; P.M. STEFANI; R. A. RUSECKAITE
Revista:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)
Editorial:
SPRINGER
Referencias:
Año: 2012 vol. 89 p. 1733 - 1740
ISSN:
0003-021X
Resumen:
The aim of the present study was to upgrade the bonding quality and water resistance of medium-density particleboards based on rice husk (RH) as wood substitute and soybean protein concentrate (SPC) as binder via chemical modification of SPC. Alkali (A), citric acid (CA) and boric acid (BA) were used to modify proteins and carbohydrate complex in SPC. The effect of chemical treatment performed on SPC was followed by Fourier Transform Infrared (FTIR), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and initial apparent viscosity measurements. Board properties were evaluated in terms of internal bond (IB) and physical properties. Results revealed that boards bonded with SPC treated with boric acid, exhibited the highest IB and the lowest water absorption and thickness swelling at 2h and 24 h, due to crosslinking reactions with exposed OH-groups in the amorphous region of cellulose of RH. Results demonstrate that boric acid ? modified - SPC? bonded boards met the requirements of IB recommended by the US Standard ANSI A208.1 ? 2009 for M1, MS, M2 and M3-grade medium - density particleboards but failed at passing the thickness swelling required. This issue of BSPC-RH boards is compensated with the benefit of being formaldehyde ? free which makes them suitable for indoor application.