Abstract：
:This study describes the use of lignin as natural adhesive for the production high density fiberboards (HDF) made from wheat straw. In the present work, this agricultural residue was used to produce thermomechanical pulp and the used lignin was obtained from the spent liquors generated in the same process. A hot pressing process was conducted to manufacture these fiberboards and different percentages of this green adhesive were targeted. The wheat straw raw material and its pulp were characterized. Apart from that, the chemical composition and the thermal properties of the lignin sample were evaluated. Physical and mechanical properties were assessed and the results revealed that the panels made only with wheat straw fibers had a flexural strength value (52.79MPa) even above the value corresponding to the commercial HDF (41.70MPa). Also, results showed that the incorporation of soda-lignin lead to lignocellulosic composites that, as lignin content was increased (from 0 to 15%), mechanical properties were enhanced. The highest mechanical performance was reached for fiberboards at 15% of lignin with a flexural strength of 96.81MPa, a flexural modulus of 3.55GPa, and finally an internal bond of 1.46MPa.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Domínguez-Robles J,Tarrés Q,Delgado-Aguilar M,Rodríguez A,Espinach FX,Mutjé Pdoi
10.1016/j.ijbiomac.2017.11.005subject
Has Abstractpub_date
2018-03-01 00:00:00pages
927-935eissn
0141-8130issn
1879-0003pii
S0141-8130(17)33089-1journal_volume
108pub_type
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