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NANOPAPER from almond SHELL

NANOPAPER from almond SHELL. May 8-9, Coimbra , Portugal. Eduardo Robles, Iñaki Urruzola , Jalel Labidi. Biorefinery Process Group Department of Chemical and Environmental Engineering University of Basque Country Pza . Europa 1, 20018, San Sebastian, SPAIN

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NANOPAPER from almond SHELL

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  1. NANOPAPER from almond SHELL May 8-9, Coimbra, Portugal Eduardo Robles, IñakiUrruzola, JalelLabidi Biorefinery Process Group Department of Chemical and Environmental Engineering University of Basque Country Pza. Europa 1, 20018, San Sebastian, SPAIN Correspondence to: jalel.labidi@ehu.es

  2. COST Action FP1105 May 8-9 Coimbra, Portugal Objectives • To obtain cellulose nanofibers from almond shell (Prunusdulcis) with two different methods. • To manufacture papers from the obtained nanofibers and to compare their mechanical properties. Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  3. COST Action FP1105 May 8-9 Coimbra, Portugal Procedure Bleaching NaOH + H2O2 + DTPA + MgSO4 T = 70 ºC t = 150 min Method 1 Ethanol/water 60/40 v/v T = 130 ºC t = 90 min Hot pressing T = 100 ºC P = 185 bar t = 25 min Pretreatment NaOH (1%) v/v alkaline solution T = 20 ºC t = 24 h Hydrogel preparation Vacuum filtering 0.45 μm nylon filter Acetylation HNO3 (1/3) w/w Acetic Acid (1/20) w/w T= boiling t = 30 min Method 2 NaOH 7.5% v/v T = 60 ºC t = 24 h Hydrolysis H2SO4 (8..5 mL /g) T = 45 ºC t = 60 min Homogenization 40 passes P = 800-1200 bar Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  4. COST Action FP1105 May 8-9 Coimbra, Portugal Results Particular characteristics in the deformation of the nanofibers and the interaction between the nanofibers in each kind of nanopaper are involved in the performance of the paper under tensile stress. When compared to data from regular micropaper, it can be seen that nanopapers definitely presented improved properties. Stress vs Strain Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  5. COST Action FP1105 May 8-9 Coimbra, Portugal Results The low porosity is associated with the close-packing properties of materials with high crystallinity; considering that the crystallinity of cellulose nanofibers from almond shells was around 80% for both methods, the small amount of space between fibers prevents pore formation, thus improving mechanical properties Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  6. COST Action FP1105 May 8-9 Coimbra, Portugal Conclusions • Chemical methods for the removal of non-cellulosic components were effective, providing pulps with high α-cellulose content, acid hydrolysis increased the crystallinity. • The nanopapers obtained in this study were flexible and translucent and exhibited improved mechanical properties compared to micropaper, but still not better than nanopaper made from other raw material. NaOH 7.5% represents a very effective delignification process to eliminate non-cellulosic components. The nanopaper obtained by this method presented slightly better mechanical properties than the nanopaper from organosolv. Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  7. COST Action FP1105 May 8-9 Coimbra, Portugal References Urruzola I, Robles E, Serrano L, Labidi J, Nanopaper from almond (Prunusdulcis) Shell, Cellulose (2014) (In press) HenrikssonM, Berglund LA, Isaksson P, Lindström T, Nishino T, Cellulose nanopaper structures of high toughness, Biomacromolecules 9 (2008) 1579–1585. Pirayesh, H., Khazaeian, A. (2012) Using almond (Prunusamygdalus L.) shell as a bio-waste ability in Wood based composite, Composites: Part B 43 1475–1479. Sehaqui H, Liu A, Zhou Q., Berglund L.A, Fast preparation procedure for large, flat cellulose and cellulose/inorganic nanopaper structures, Biomacromolecules 11(2010) 2195–2198. Serrano L, Urruzola I, Nemeth D, Belafi-Bako K, Labidi J, Modified cellulose microfibrils as benzene adsorbent, Desalination 270 (2011) 143-150. Yousefi H, Hejazi S, Mousavi M, Azusa Y, Heidari AH, Comparative study of paper and nanopaper properties prepared from bacterial cellulose nanofibers and fibers/ground cellulose nanofibers of canola straw, Industrial Crops and Products 43 (2013) 732– 737 Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

  8. COST Action FP1105 May 8-9 Coimbra, Portugal THANK YOU! Author would also like to thank to CONACyT, Mexico for support provided through Scholarship 216178. Nanopaper From Almond Shell. Eduardo Robles, IñakiUrruzola, JalelLabidi.

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