Mechanical evaluation of laminates based on phenolic resins using lignins as partial substitutes for pheno

TAVERNA, M. E.; OLLEARO, R.; MORÁN, J; NICOLAU, V.; ESTENOZ, D.; FRONTINI, PATRICIA

BIORESOURCES

NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI

Lugar: Raleigh; Año: 2015 vol. 10 p. 8325 - 8338

1930-2126

The reduction of phenol and/or formaldehyde consumption during phenolic resin synthesis is of great technological and scientific interest because of its economic and environmental implications. In this work, the use of hydroxymethylated commercial lignins as partial replacement of phenol in the resol phenol-formaldehyde base resins for decorative laminates production was experimentally studied. The work involved: i) the industrial synthesis of traditional and modified resols with 10 %w/w of sodium lignosulfonate and Kraft-type lignin, ii) the industrial impregnation of Kraft-type papers with the produced resins, iii) the production of laminates at laboratory and industrial scale, and, iv) the measurement of their final properties. Mechanical performance of laminates was evaluated via the determination of Young Modulus, bending strength, biaxial impact strength and Mode- I interlaminar fracture toughness. Also, an important routine test for industrial laminates, the boiling water resistance, was carried out according to IRAM 13367. Modified laminates exhibited mechanical properties in general statistically comparable with those of traditional laminates showing that the partial replacement has no detrimental effects on the overall performance of the decorative laminates. Industrial tests were carried out at Centro S.A, San Francisco, Córdoba, Argentina.