Use of nanocellulose in fibre-based packaging: from barrier to active and intelligent packaging Julien BRAS November 23 th , 2016 University Grenoble Alpes, Grenoble INP - LGP2 Institut Universitaire de France (IUF 2016-2021) [email protected] 1
Use of nanocellulose in fibre-based packaging: from barrier to activeand intelligent packaging
Julien BRAS
November 23th, 2016
University Grenoble Alpes, Grenoble INP - LGP2
Institut Universitaire de France (IUF 2016-2021) [email protected]
1
AT THE CROSSROAD OF LEADING DISCIPLINES
CHEMISTRY, MATERIALS, PROCESSES
Biorefinery: woodchemistry and eco-
process
Multi-scale bio-basedmaterials
Surface functionalization by
printing
www. pagora.grenoble-inp.fr
Laboratory of Paper science & Graphic arts
LGP2 - UMR 5518
10 Permanent researchers, 5 technical staff, 25 PhD & Post-doc
3 research departments
1. Nanocellulose & production
2. From barrier packaging…
3. To active & intelligent packaging
OUTLINE
NanoCellulose
Evolution of annual non-cumulative
number of publications and patents
on nanocellulose(Source: SciFinder, July 2016 –
descriptors : cellulose nanofibrils, cellulose microfibrils, cellulose
nanocrystals, cellulose nanowhiskers, microfibrillated cellulose)
AmorphousCrystalline
fiber
microfibril
Hierarchical Structure
Adapted from Pääkkö, et al. 2007
Multi-level Organization
(Nano)Cellulose
1. Hydrolysis
2. Dialysis /UF
2. Mechanical
Homogenization
1. Defibrillation
D 2-10 nmL 150-1000 nm
D 2-20 nmL ˃ 1000 nm
Cellulose fiber
Mic
ro
fib
ril
Cellulose Nanocrystals (CNC)
Microfibrillated cellulose (MFC)
6
NanoCellulose
World Production by Type
Bacterial Cellulose
1%
Cellulose Nanocrystals
34%
Cellulose Nanofibrils
65%
Future Markets, The global market for nanocellulose to 2020, 2nd ed. Future Markets Inc, 2012
USDA
Global production
estimate: 34 million
tons/year by 2050
FPI market estimate:
$250 million in North
America by 2020
Production cost:
Pulp: $0.75-1.00/kg
Nanocellulose: $4-40/kg
Cranston 2015
Nanocellulose
Slide provided by Robert Moon, USDA FPL
Nanocellulose
=> Nanocellulose = 2nd priority of european Bioeconomy
=> Not only fashionable but also sustainable
NanoCellulose
10
(figure in ktons)
NanoCellulose
1. Nanocellulose & production
2. From barrier packaging…
3. To active & intelligent packaging
OUTLINE
Paper & Nanocellulose: In Bulk
Bardet R.., Bras J., MFC in Paper, 2014, Handbook of Green Materials, K.Oksman,
Several strategies
BUT not with NCC
Adapted from Voith, 2013
Coating Formula &
rheology process Drying PropertiesCoating process
Paper & Nanocellulose : On Surface
Why not coating nanocellulose ?
Bardet R.., Bras J., MFC in Paper, 2014, Handbook of Green Materials, K.Oksman
Paper & Nanocellulose : On Surface
MFC
15
Water Vapor Permeability
(x10-11g/(m.s.Pa)
Oxyge
n p
erm
eab
ility
(cm
3.µ
m)/
(m².
da
y.kP
a)
10000
1000
100
10
1
0.1
0.01
1000010010.010.0001
Lavoine et al. (2012)
=> CNF = The best bio-based barrier
…at low HR
Paper & Nanocellulose : Barrier
Structure properties (SEM, coat weights, thickness)
Mechanical properties (Young modulus, strength, elongation at break, burst index, bending
stiffness)
Barrier properties (Air permeability, grease resistance, water absorption)
MFC
suspension
Base paper
Bar coating process Size press process
ANALYSIS
MFC MFC
&
MFC
COATING
MATERIALS
Lavoine N.,et al (2014), Impact of
different coating processes of
microfibrillated cellulose on the
mechanical and barrier properties of
paper, J. Mater. Sci., 49, 2879-2893.
Paper & Nanocellulose : Barrier
0
1
2
3
4
5
6
7
8
9
10
Base paper x5 x10
Bendin
g s
tiff
ness (
x1
00
mN
.m)
Water treatment_Cross direction
MFC coating_Cross direction
0
1000
2000
3000
4000
5000
6000
7000
8000
5 10
Air
perm
ean
ce (n
m/P
a.s
)
Number of treatments/coatings
Bar coating - H2O Bar coating - MFC
Size press - H2O Size Press - MFC
Base paper
=> Positive impact on air barrier &
stiffness only for bar coating
Paper & Nanocellulose : Barrier
Paper Paper+MFC
GR
EA
SE
BA
RR
IER
0
20
40
60
80
100
0 5 10 15
Pa
per s
urfa
ce c
ov
ered
by
th
e o
il (
%)
Number of layers
Water treatment
MFC coating
Lavoine N.,et al (2014), J. Mater. Sci., 49, 2879-2893.
=> Interesting grease barrier of MFC coating
Paper & Nanocellulose : Barrier
19Bardet, Reverdy, Belgacem, Leirset, Syverud, Bras, J
(2015) Cellulose, 22(2), 1227-1241
Paper & Nanocellulose : Barrier
Adapted from Voith, 2013
0,0
2,0
4,0
6,0
8,0
10,0
12,0
14,0
16,0
50 60 70 80 90 100
Oxy
gen
Pe
rme
abili
ty(c
m3
.µm
/m².
d.k
Pa)
Relative Humidity (%)
CNF
CNF overdried
CNF/CNC-T
CNF/CNC-T overdried30%
Paper & Nanocellulose : Barrier
Guezennec et al, SunPap conference, 2013
Paper & Nanocellulose : Barrier
=> CNF = network controlling-
dispersing drying energy
=> No more BlisteringAdapted from Guezennec et al,
SunPap conference, 2013
Paper & Nanocellulose : Barrier
Adapted from Guezennec et al,
SunPap conference, 2013
Paper & Nanocellulose : Barrier
1. Nanocellulose & production
2. From barrier packaging…
3. To active & intelligent packaging
OUTLINE
25
Release mechanism Antimicrobial agents incorporated in
the packaging. Migrate into food through
diffusioning and partitioning. Very positive impact of MFC for
release monitoring=> prolonged antimicrobial activity
whatever molecules
(i) Incorporation into CNF network
Lavoine, N.; Desloges, I.; Sillard, C.; Bras, J. (2014)
Controlled release and long-term antibacterial activity of chlorhexidine
digluconate through the nanoporous network of microfibrillated cellulose,
Cellulose, 21(6), 4429-4442.
BUT Decreasing effect over time.
Antimicrobial packaging
26
Release mechanism Antimicrobial agents incorporated in
the packaging. Migrate into food through
diffusioning and partitioning. Decreasing effect over time.
Contact mechanism Antimicrobial agents immobilized on the
packaging. Microbial suppression at the contact
surface without diffusion. Prolong effect.
(i) Incorporation into CNF network (ii) Immobilisation onto CNF
- Saini, ; Belgacem, N; Mendes, J; Elegir, G; Bras, J
Contact Antimicrobial Surface Obtained by Chemical Grafting of Microfibrillated Cellulose in Aqueous Solution Limiting Antibiotic Release,
ACS Applied Materials & Interfaces (2015), 7(32), 18076-18085
-Saini, M. N. Belgacem, K. Missoum, J. Bras,
Natural active molecule chemical grafting on the surface of microfibrillated cellulose for fabrication of contact active antimicrobial
surfaces, Industrial Crops and Products (2015), Accepted-in press.
BUT solvent system or bacteria selectivity
Antimicrobial packaging
27
Chitosan - (1, 4)-linked 2-amino-deoxy-b-D glucan units
Sources in the form of chitin : Sea crustaceans
Limited applications due to:
ˣ insolubility in water
ˣ high viscosity
ˣ tendency to coagulate with
proteins
ˣ difficulties to obtain high
specific area nanofibre (cost)
Responsible for antibacterial activity
Antimicrobial packaging
CNF functionnalization
Nechyporchuk, Belgacem, Bras
Production of cellulose nanofibrils: a review of recent advances,
Ind crops (2016), in press
Mechanical Treatment(Homogeniser, Microfluidiser, Grinding) Pretreatment
29
*Pääkkö et al. (2007) Biomacromolecules
Enzymatic Hydrolysis
( Cellulase or endoglucanase)
Tempo oxidation
(Tempo/NaBr/NaClO)
Cationization
(2,3-epoxypropyl
trimethylammonium chloride or
chlorocholine chloride)
*Pei et al. (2013) Soft matter
L>2 µm / D>30 nm
L>2 µm / D>30
nm
L ~2,2 µm / D = 2-5 nm
*Siqueira et al. (2009) Biomacromolecules
*Saito et al. (2006) Biomacromolecules
CNF Pre-treatment
30
2,3-epoxypropyl trimethylammonium chloride (EPTMAC)
NaOH, EPTMAC (65°C)
Step 1: Optimisation of pretreatment for different DS
Degree of substitution
Energy consumption
Cationized nanofibrils
+
++
++
+ +
+
++
++
+ +
Morphology
Qualitative and quantitative
antimicrobial activityActivity against
Gram +ve and Gram
–ve bacteria
Step 2: Antibacterial activity
evaluation of cationic CNF
CNF Pre-treatment
Surface cationized cellulose nanofibrils for the production of contact active antimicrobial surfaces ,
S. Saini, C. Yucel-Falco, M. N. Belgacem, J. Bras Carbohydrate polymers (2015), 135, pp 239-247.
31
• No Zone of inhibtion: No free EPTMAC leaching• Antimicrobial by contact
Bacteria: Bacillus subtilis (Level 1) Gram +ve
CAT-MFC DS= 0.18PENICILLIN: Positive Control ENZY MFC: Negative Control
Antimicrobial packaging
CATMFC DS=0,04: Antimicrobial agents lower than Minimum inhibitory concentration.
CATMFC DS=0,18: 3 log reduction with high SD => samples are heterogenous.
E.coli – need to increase degree of substitution.
32
1,00E+00
1,00E+01
1,00E+02
1,00E+03
1,00E+04
1,00E+05
1,00E+06
1,00E+07
1,00E+08
1,00E+09
0 0,05 0,1 0,15 0,2
CF
U/
ml
Degree of substitution
B. subtilis (Gram +ve) S. aureus (Gram +ve) E.Coli (Gram -ve)
Initial CFU 1,65E+05
S. Saini, C. Yucel-Falco, M. N. Belgacem, J. Bras, « Surface cationized
cellulose nanofibrils for the production of contact active antimicrobial
surfaces », Carbohydrate polymers (2015), 135, pp 239-247.
Antimicrobial packaging
Industrial Pilot trial at Multipackaging Solutions
33
Towards demonstrator
Antimicrobial packaging
0
200
400
600
800
1000
1200
2000 2005 2010 2015
Pa
ten
t +
pu
bli
cati
on
nu
mb
er
Year
Nanocellulose
Nanocellulose+Electronics
- High value added expectations
- Less than 10 years
- Very new field: only few research groups and companies
Hoeng , Denneulin, Bras, Use of Nanocellulose in printed electronics,
Nanoscale, 2016
Nanocellulose & printed electronics
Nanocellulose as dispersing agent for mineral/conductive particles
Carbon nanotubes –CNC (Oliver et al. 2012, Moreau et al. 2016)
TiO2 - CNF(Bardet et al. 2013)
Polypyrrole- CNF(Sasso et al. 2010Wu et al. 2014 )
MoS2 and BN - CNF (Li et al. 2015)
OH OHOH
Carbon nanotubes –CNF(Koga et al. 2013, Tang et al. 2014)
No work with silver nanowires
Nanocellulose for printed electronics
Materials and methods
Conductive ink based on nanocelluloses: process
Cellulose microfibrilsL= 1 µm
d= 20 nm
Silver NW in solvent
PolyBioWire® Ink(Patent protected –
FR1553131)
Easy process
No addition of others chemicals
AdaptedMixing
Stable silvernanowires ink
Stable aqueous silver nanowires ink based on renewable materials
Silver nanowiresL= 50 µm
d= 150-200 nm
Cellulose microfibrils gel
Conductive ink based on nanocelluloses: process
0,4
0,5
0,6
0,7
0,8
0,9
1
1,1
1,2
1,3
0 5 10 15 20 25
Sed
imen
t h
eig
ht
(cm
)
Time (days)
CNF
CNC
HPMC
Neat CNF
Neat CNF Functionnalized
CNF
Funct. CNF
Stable aqueous silver nanowires ink only with Functionnalized CNF
PolyBioWire®: opto-electrical properties
PolyBioWire® film properties on PET PolyBioWire® film
Substrate PET
Rsh (Ω/)* 22 ± 3
T% (%)* 88 ± 0,4
L* 3,1 ± 1,8
a* 0,56 ± 0,08
b* 0,78 ± 0,31
*Best compromise in opto-electrical properties
No color deviation
High transmittance
Low resistance
PolyBioWire® coated film
PolyBioWire® film patent protected FR1553131)
PolyBioWire®: PolyBioWire® film properties
PolyBioWire® flexibility
PolyBioWire® adhesion on substrate
Rsh (Ω/)
Before scotch test After scotch test
Silver nanowires 61 ± 22 /
MFC-Silver nanowires 22 ± 2 23 ± 4
Conductive properties evenunder flexion
PolyBioWire® is flexible
Increase adhesion thanksto MFC
No change in conductiveproperties
PolyBioWire® film flexibility (patent protected FR1553131)
Flexible conductive film with no need of protection layer
Hoeng et al , PE-US, 2015
1. Nanocellulose & production
2. From barrier packaging…
3. To active & intelligent packaging
OUTLINE
Conclusions
Nanocellulose in MatBio
Lab scale trials from CTP
(Dynamic handsheets)
CTP’s curtain coater located above Grenoble INP Pagora’s paper machine
THANK YOU FOR YOUR ATTENTION
Join us in the LinkedIn group « Nanocellulose Materials »
Acknowledgement to my collaborators in this work:
Seema, Charlene, Oleksander, Nathalie, Isabelle, Naceur
2 Post-doc positions
open: Contact me