L IGNIN UTILISATION AS BONDING MATERIAL FOR PLYWOOD PANELS 8 October 2013, Trabzon, Turkey E. Papadopoulou, S. Kountouras, T. Sevastiadis Z. Nikolaidou, E. Roumeli, K. Chrissafis

BICORE: Biocommodities refinery Use of chemistry and biotechnology to produce various materials and products (2 nd generation fuels, resins, polymers, surfactants, food ingredients).

CIMV Biolignin™: Chemical structure CIMV lignin composed of linear polymers

Condensation reaction of PFL polymer Polymerization reaction takes place within some hours at a temperature of about °C. The polymerisation is stopped by cooling when the target viscosity is reached.

FTIR of lignin based resins PF std. Lignin PFL resin 1640 cm cm cm -1 = phenolic OH groups 1640cm -1 = vibration of aromatic compounds. It signifies the reaction between aldehyde and phenol/lignin adduct.

Plywood panels testing & evaluation Wood failure test Shear strength test Requirements of the EN314.2 standard Free formaldehyde emissions: CARB II rule = 0.05ppm According to CARB rule: 0.04ppm (ASTM E1333) corresponds to 0.3mg/L (F**** as per JIS A1460)

Testing results of PW with PFGL resins (CIMV Glyoxalated lignin) Sub. Level, % Phenol-Form. PF std Pre-treatment 5.1.1: Immersion in water of 20°C for 24h Shear strength, N/mm Wood failure, % Pre-treatment 5.1.3: 4h boiling - 16h drying at 60°C- 4h in boiling water - 1h in cool water Shear strength, N/mm Wood failure, % Pre-treatment 5.1.4: 72h in boiling water- cooling in water for 1h Shear strength, N/mm Wood failure, % FF, Desiccator, mg/L

Conclusions The BIOCORE lignin samples can give resins with adhesion performance comparable to that of a standard PF. Phenol substitution levels up to 70% can be achieved with good results. Plywood panels produced with PFGL resin having up to sub. Level of Ph.- F, can be classified as of class 3 panels (non covered - exterior use). All plywood panels produced fulfill CARB II rule for free formaldehyde emissions. The new resins are less harmful for the environment and the people, while offer a solution for more sustainable products.

24 people, 35 years expertise, technology applied in more than 70 industrial plants located in more than 37 countries. CHIMAR HELLAS is a Greek SME, provider of:  innovative industrial technology for the resin and wood-based panel industries in all continents.  customer focused R&D, technical support, advanced training, testing and evaluation services  plants for producing formaldehyde, UFC, resins, impregnation syrups and additives  value-added services (quality management systems, industrial property rights protection, accredited lab testing)

Contact Details Electra Papadopoulou Senior Researcher, R&D Department Sofouli 88, Thessaloniki, GREECE Tel: Fax: Acknowledgements To the EU FP7 because this work has been carried out with the European Commission economic support (contract no FP ).