Transcript Development of electrically-conducting wood

University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Development of electrically-conducting
wood-plastics composites
STSM : Pauline Rivière, BOKU Vienna, Austria
at Heriot Watt University of Edinburgh, Scotland
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
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Introduction
 Design and production of short fibres reinforced plastics:
 Efficient mixing
 Interaction polymer/ filler for a suitable load transfer!
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Compounding Extruder (Source: Alain Celzard, ENSTIB)
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
2
Introduction
 Importance of biocomposites:
Bioplastics: 2 types
09.04.2015
Institute for Natural Materials Technology
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
I
Pauline Rivière
3
Introduction
 Importance of biocomposites :Poly Lactic Acid
PE 3251D
Reference Bioplastics as PLA and BIO PLA
Producer natural fibers reinforced plastics
Origin
Chemical nature
BIO PolyEthylen
PE SHA 7260
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Starch or sugar fermentation to acid
lactic
Sugar fermentation to
ethanol
polyester
polyalcane
Polar
apolar
100% (Compostable)
0%
Building block
Polarity of the surface functions
Biodegradability (%)
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
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Introduction
 Importance of biocomposites:
Bioplastics
Natural fibres reinforced plastics
09.04.2015
Institute for Natural Materials Technology
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
I
Pauline Rivière
5
Interest of natural fibers reinforcement
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Benefits
Disadvantages
Light weighted
Water sorption
Cheaper raw material
Possible odor
Environmental friendly
Pelletizing : Natural fibers (bagasse,
hemp, flax) requested
Mechanical reinforcement
Homogeneity and seasonality
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
6
Introduction
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
WPC compound (Source: Norbert Mundigler IFA Tulln)
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
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The project BIOFUNK
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Main Goal:
Electrically conducting Wood- Bioplastics Composites through CNT
 First: Multi walled CNT (diameter up to 20nm, length up to 10µm) reinforced
Biopolymers: PLA and BIO PE
 Second: Insertion of wood particles and surface modification
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
8
CNT simulation at Heriot Watt University
 Specialized on Carbon Nanotube simulation:
 Importance of the connection between CNT
 Stabilization of the contact area between
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
two CNTs with amphiphilic molecules.
 Dispersion of CNT in aqueous surfactants
solution
from Müter D 2012. Angular Dependence of Surfractant- Mediated Forces
Between Carbon Nanotubes. J. Phys. Chem. B 116: 14869-14875
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
9
CNT simulation at Heriot Watt University
 Specialized on Carbon Nanotube simulation
 Importance of the connection inter CNTs
 Stabilization of the contact area between
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
two CNTs with amphiphilic molecules.
 Dispersion of CNT in aqueous surfactant
solution
 STSM for one week
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
10
Mechanical Characterization
 Tensile (ISO 527)
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
11
STSM Discussions
Conclusions:
 Proper distribution of the fillers,
 Poor adhesion and/or bad dispersion of CNTs
 Better electron mobility in the Polymer itself (PLA)
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Next steps:
 Development of the electrical measurement
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
12
Electrical Conductivity
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Multimeter
Keithley 2601 A
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
13
STSM Discussions
Conclusions:
 Proper distribution of the filler,
 Poor adhesion and/or bad dispersion of CNTs
 Better electron mobility in the polymer itself (PLA)
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Next steps:
 Development of the electrical measurement
 Complete the Atomic Force Microscopy with Scanning Electron
Microscopy
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
14
ESEM observation of fractured surfaces
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
1 μm
500 nm
Bio PE-CNT-10 %
09.04.2015
Institute for Natural Materials Technology
PLA-CNT-7,5%
I
Pauline Rivière
15
AFM observation of fractured surface
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
1 μm
1 μm
Topography
09.04.2015
Phase
Bio PE-CNT-7,5 %
Institute for Natural Materials Technology
I
Pauline Rivière
16
University of Natural Resources
and Life Sciences, Vienna
Department for Agrobiotechnology
Thank you for your attention
09.04.2015
Institute for Natural Materials Technology
I
Pauline Rivière
17