Summary
The utilization of lignin from Pinus radiata black liquor, as a copolymer in ligninphenol-formaldehyde resin binders was studied. Methylolation, demethylation and ultrafiltration separation of high molecular-weight fractions were carried out in order to increase lignin reactivity. The different modified lignins were tested in preparation of lignin-phenolformaldehyde resin binders. Mechanical properties and water resistance were evaluated through testing particleboard panels manufactured with the resins obtained. The best resin was composed of 18,8% ultrafiltrated high molecular weight lignin, 22,9% phenol and 58,3% formaldehyde and had comparable properties with typical commercial resins prepared only with phenol and formaldehyde. An economic analysis was made in order to compare possible benefits obtained through the replacement of phenol by lignin products. The ultrafiltrated lignin copolymer was significantly less costly than a phenol-formaldehyde resin and had comparable physical and chemical properties.
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References
Anonymous, 1984: Lignin is coming on age for use in polymeric materials Chemical Week, Sept. 1984
Dolenko, A. J.; Clarke, M. R. 1978: Resin binders from kraft lignin. For. Prod. J. 28 (8): 41–46
Espinoza, J. C. 1985: Lignina de pino radiata. Obtención y elaboración de resinas tipo fenolformaldehido. Tesis de Grado, Depto. Ing. Quimica, P. U. Católica de Chile
Forss, K.; Fuhrmann, A. 1979: Finish plywood, particleboard and fiberboard made with a lignin-base adhesive. For. Prod. J. 29/7: 39–43
Forss, K.; Fuhrmann, A. 1976: Karatex-a lignin based adhesive for plywood particleboard and fiberboard.Pap. Puu 58: 817–824
Glasser, W. 1981: Potential role of lignin in tomorrow's wood utilization technologies. For. Prod. J., 31 (3): 24–29
Hayashi, A.; Namura, Y.; Urkita, T. 1967: Demethylation of lignosulphonate during the gelling reaction with dichromate. Mokuzai Gakkaishi 13: 194–197
Marton, A. 1966: Lignin structure and reactions. Adv. Chem. Ser. 59, Am. Chem. Soc. Washington, D.C.
Natho, A. 1986: Lignina: Formulación y elaboración de resinas tipo lignina-fenolformaldehido. Tesis de Grado, Depto. Ing. Quimica, P. Universidad Católica de Chile.
Narayamusti, D., George, J. 1954: Composite Wood. 1: 51–55
Olivares, M.; Guzman, J. A.; Espinoza, J. C.; Saavedra, A 1985: Caracterización y usos de la lignina ler Taller de Aprovechamiento Recursos Lignocelulósicos, U. Católica de Valparaiso, CONICYT, Chile. Actas, 25 pp.
Olivares, M.; Guzmán, J. A.; Natho, A.; Ibañez, I.; Saavedra, A 1986: Caracterización y usos de la lignina, 2aParte. 2° Taller de Aprovechamiento de Recursos Lignocelulósicos. P. Universidad Católica de Chile, Sede Talca, CONICYT, Chile, Actas, 11 pp.
Olivares, M.; Guzmán, J. A.; Jordan, R. 1985: Characterization of lignin tall-oil soap and analysis of possible uses. For. Prod. Res. Intern. Achievements and the Future. Pretoria, South Africa proceedings. Vol 1: 6–5
Shashi Jolli, S. P.; Singh, S. V.; Gupta, R. C. 1982: Kinetics and mechanisms of lignin formaldehyde resinification reaction. Cellul. Chem. Techn. 16: 511–522
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The authors acknowledge financial support from the Office of Research, Catholic University of Chile (DIUC) and the National Science Foundation of Chile (CONICYT)
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Olivares, M., Guzmán, J.A., Natho, A. et al. Kraft lignin utilization in adhesives. Wood Sci.Technol. 22, 157–165 (1988). https://doi.org/10.1007/BF00355851
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DOI: https://doi.org/10.1007/BF00355851