Nanocellulose enhanced lightweight particleboards Workshop title: Cellulosic material properties and industrial potential 13th – 14th April 2016, SP Technical Research Institute of Sweden, Borås, Sweden Electra Papadopoulou, Sotiris Kountouras, Maria Ntaliari, Costas Stathopoulos, Alexis Kotsis, Kyriakos-Vasileios Adam, Zoi Terzopoulou, Konstantinos Chrissafis, Konstantinos Triantafyllides, Dimitrios Bikiaris COST FP1205: Innovative applications of regenerated wood cellulose fibres

Ministry of Education and Religious Affairs, Culture & Sports Binding Innovation EU project title: New Lightweight and Nanotechnology Enhanced Bio-composites from Lignocellulosic Materials Project: FIBRACOM – Cooperation Greece - China Greek partners: CHIMAR, CRES, AUTH Chinese partners: Institute of Bast Fiber Crops (Chinese Academy of Agricultural Sciences), Dalian Polytechnic University, Liaoyang Yimeng Carpet Manufac-turing Co. Web site: http://fibracom.physics.auth.gr/ Duration: 32 months Start date – End date: 1 April 2013 – 30 November 2015 O.P. Competitiveness and Entrepreneurship (EPAN ΙΙ), ROP Macedonia - Thrace, ROP Crete and Aegean Islands, ROP Thessaly - Mainland Greece - Epirus, ROP Attica Ministry of Education and Religious Affairs, Culture & Sports GSRT - Management and Implementation Agency for RTD and Innovation Activities

Binding Innovation Nanocellulose NFC was produced using mechanical refining to reduce the size of the fibers to nanoscale

Surface modification of nanocellulose Binding Innovation Surface modification of nanocellulose Cellulose has surface hydroxyl groups Cellulose/nanocellulose OH Cellulose/nanocellulose OCO-(CH2)2-NH2 Addition of active surface groups 4-aminobutanoic acid H2SO4 140 °C, 5 hours

Verification of surface modification of nanocellulose Binding Innovation Verification of surface modification of nanocellulose C=O absorbtion at 1750 cm-1 NH2 amino group absorption not visible due to overlap with –OH peals

Addition level on the gluing system, s/l Binding Innovation Gluing system Nano-additive in tannin-based glue Addition level on the gluing system, s/l Nano Fibrillated Cellulose (NFC) 1% NFC-OCΟCΗ2CH2NH2 0.56% The additives were well dispersed via mechanical stirring

Preparation of lightweight Particleboards from Hemp Binding Innovation Preparation of lightweight Particleboards from Hemp The panels were from hemp and had density 400kg/m3

Testing results of lightweight hemp PBs Binding Innovation Testing results of lightweight hemp PBs Density 400kg/m3 Formula   1 2 3 Additive Tannin/Blank Tannin/NFC Tannin/NFC-OCΟCΗ2CH2NH2 short press time, s/mm Unit Value IB N/mm2 Ave 0.30 0.29 0.26 TS 24h, 20oC % 52.64 56.88 56.33 MOR 6.08 5.67 4.96 MOE 1217 1185 1051 Formaldehyde content 6.5% MC mg/100g 0.75 0.81 0.69 Long press time, s/mm 0.35 0.33 0.28 45.82 50.74 53.22 9.09 5.38 5.72 1820 1180 1248

Binding Innovation Conclusions The addition of NCF as such, rendered no improvement to the resin The surface modification of NCF reduces somewhat the mechanical and wet properties of the panels but improves the formaldehyde content values.

Thank you for your attention http://www.chimarhellas.com Contact details Electra Papadopoulou Chemist, Senior Researcher CHIMAR HELLAS S.A. Sofouli 88, kalamaria GR55131, Thessaloniki, Greece papadopoulou@ari.gr & office@ari.gr