Biorefinery Process Group Department of Chemical and Environmental Engineering University of Basque Country Pza Europa 1 20018 San Sebastian SPAIN Correspondence to jalellabidiehues ID: 569270
Download Presentation The PPT/PDF document "NANOPAPER from almond SHELL" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
NANOPAPER from almond SHELL
Biorefinery
Process Group
Department of Chemical and Environmental Engineering
University of Basque CountryPza. Europa 1, 20018, San Sebastian, SPAINCorrespondence to: jalel.labidi@ehu.es
May
8-9, Coimbra, Portugal
Eduardo Robles,
Iñaki
Urruzola
,
Jalel
LabidiSlide2
COST Action FP1105 May 8-9 Coimbra, Portugal
To obtain cellulose nanofibers from almond shell (
Prunus
dulcis) with two different methods.To manufacture papers from the obtained nanofibers and to compare their mechanical properties.
ObjectivesNanopaper From Almond Shell. Eduardo Robles, Iñaki
Urruzola,
Jalel Labidi. Slide3
COST Action FP1105 May 8-9 Coimbra, Portugal
Procedure
Nanopaper From Almond Shell
. Eduardo Robles, Iñaki Urruzola, Jalel
Labidi. PretreatmentNaOH (1%) v/v alkaline solutionT = 20 ºC t = 24 h
Method 2
NaOH 7.5% v/vT = 60 ºC t = 24 h
Method 1
Ethanol/water 60/40 v/v
T = 130 ºC
t = 90 min
Bleaching
NaOH
+ H
2
O
2
+ DTPA + MgSO4 T = 70 ºCt = 150 min
Acetylation HNO3 (1/3) w/wAcetic Acid (1/20) w/wT= boilingt = 30 min
HydrolysisH2SO4 (8..5 mL /g)T = 45 ºC t = 60 min
Homogenization40 passesP = 800-1200 bar
Hydrogel preparationVacuum filtering0.45 μm nylon filter
Hot pressingT = 100 ºCP = 185 bar t = 25 min Slide4
COST Action FP1105 May 8-9 Coimbra, Portugal
Results
Nanopaper From Almond Shell
. Eduardo Robles, Iñaki Urruzola, Jalel
Labidi. Load (
N)
Tensile Stress (MPa)
Strain
(%)
Modulus
(
GPa
)
Micropaper
-
9.5
1.5
2
Method 1
24.065.14.25.3Method 224.2
62.72.95.6Particular 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 StrainSlide5
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
COST Action FP1105 May 8-9 Coimbra, Portugal
Results
Nanopaper From Almond Shell
. Eduardo Robles, Iñaki Urruzola, Jalel Labidi.
Grammage
(
g/m
2
)
Crystallinity
(%)
Micropaper
a
78
69
Method 1
86
78.2Method 29479.8Slide6
COST Action FP1105 May 8-9 Coimbra, Portugal
Conclusions
Nanopaper From Almond Shell
. Eduardo Robles, Iñaki Urruzola, Jalel
Labidi. 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.Slide7
COST Action FP1105 May 8-9 Coimbra, Portugal
References
Nanopaper From Almond Shell
. Eduardo Robles, Iñaki Urruzola, Jalel
Labidi. Urruzola I, Robles E, Serrano L, Labidi J, Nanopaper from almond (Prunus dulcis
) Shell, Cellulose (2014) (In press)
Henriksson M, 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 (
Prunus
amygdalus
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– 737Slide8
Author would also like to thank to
CONACyT
, Mexico for support provided through Scholarship 216178.
THANK YOU!
COST Action FP1105 May 8-9 Coimbra, PortugalNanopaper From Almond Shell. Eduardo Robles, Iñaki Urruzola, Jalel Labidi
.