Lignocellulosic fibres from enzyme-treated tomato plants: Characterisation and application in paperboard manufacturing.

Lignocellulosic raw materials are being utilised in many industrial sectors as a natural source of interesting biopolymers. In the present research, tomato plant agri-waste, were subjected to an enzymatic treatment (pectinase, hemicellulase, xylanase and laccase) with the aim of recovering polymeric matrices contained therein and obtain a good quality fibre. The cellulose content in the enzyme-treated fibres was enriched of 25% compared to the untreated, and a fair reduction in hemicellulose and lignin was registered. Morphological analyses at SEM demonstrated the cleanliness and fibrillation of fibres. Moreover, the thermal profile, water absorption and pulp viscosity of fibres was strongly affected by the composition changes. The paperboard manufactured from an enzymatically treated sample showed increased stiffness when subjected to tensile testing respect to the control. Therefore, the use of enzyme in fibre pulping has a potential application in the design of sustainable materials.