Performance Analysis of Ammonium Lignosulfonate/Urea Formaldehyde-Free Fiberboards
The tests on physical and mechanical properties of fiberboards made of wood fiber with ammonium lignosulphonate/urea as filling material are performed according to requirement of EU standards EN 622-2-2004 "Fibreboard-Specifications Part 2: Requirements for hardboard" reveal the reaction mechanism of formaldehyde-free fiberboards with ammonium lignosulfonate /urea as filling material through analysis of characteristics of chemical reactions on ammonium lignosulfonate and urea by FTIR and the chemical reaction analysis of C atom by ESCA. The results show that physical and mechanical properties of fiberboards with ammonium lignosulphonate/urea as filling material have reached the requirement of EU standards EN 622-2-2004, the forming of furan resin, the results of reaction between urea and furfural substances is main reason for the better physical and mechanical properties of lignin-based formaldehyde-free fiberboard.
Zhenyu Du and X.B Sun
M. H. Guo et al., "Performance Analysis of Ammonium Lignosulfonate/Urea Formaldehyde-Free Fiberboards", Advanced Materials Research, Vols. 113-116, pp. 1774-1778, 2010