Preparation of Single Pulp Fibres for Dynamic Mechanical
Analyses Using a Microrobotic Platform
Trabzon, 09.10.2013 Steffen Baasner
21.04.23
Structure
1. Purpose of the STSM
2. Micro Robotic Platform and Preparation of Single Pulp Fibres at Technical University Tampere
3. Dynamic Mechanical Analyses at PTS Heidenau
4. First Results
2
21.04.23
1. Purpose of The Short Term Scientific Mission (STSM)
Paper Paper
Single FibreSingle Fibre Fibre BondsFibre Bonds
- Preparation (STSM)
- measurement
http://www.schrader-loos.de/t3/uploads/pics/europakarte_01.gif
3
21.04.23
2. Micro Robotic Platform and Preparation of Single Fibres at Technical University Tampere
Figure 1: microrobotic platform at TUT
platformplatformSide view cameraSide view camera
Top view cameraTop view camera
4
21.04.23
2. Micro Robotic Platform and Preparation of Single Fibres at Technical University TampereSteps
1.Disintegration of the fibres in an excess of water
2.Dropping the solution into a shuck of metal which is located on a rotary table (point 1, Figure 3)
3.Pulling the single fibre (point 3, Figure 3) out of solution with microgrippers (point 2, Figure 3)
Figure 3: Pulling the single fibre out of solutionwith microgrippers
1
2
3
Rotary tableRotary table
XY – tableXY – table
MicrogrippersMicrogrippers
XYZ – MicropositionersXYZ – Micropositioners
Figure 2: function unities of the platform
Saketi, Pooya et al. (2012), Journal of Microscopy, Vol. 248, page 167
5
21.04.23
2. Micro Robotic Platform and Preparation of Single Fibres at Technical University Tampere
4. Depositing the single fibre on a plate (Figure 4).
5. Glueing it on the device (UV curing resin) on one end (Figure 5).
Overall 119 single fibres were prepared during the STSM.
Figure 4: spring metal plate Figure 5: on one end glued fibre
6
21.04.23
3. Dynamic Mechanical Analysis at PTS Heidenau
Figure 6: Dynamic Mechanical Analyzer (DMA)
• Applied load- tension or shear (sinusoidal )- force 0.001..18 N- frequency 0.001..200 Hz- amplitude 5 nm..1.6 mm
• Environmental parameters- temperature (-150…500 °C)- relative humidity (10…90 %)
at room temperature
7
21.04.23
Offset during DMA measurement (tensile load)
Specimen 1. No offset ‚Buckling‘ / only half sinus wave/no DMA measurement possbile
„Auto-Offset“
static stretching = dynamic stretching · offset - factor
gL
FE
t
cos' EEStorage modulus
sin" EELoss modulus
tanDamping
Result of Measurement:
Calculation
3. Dynamic Mechanical Analysis at PTS Heidenau
2. Static stretching:No ‚Buckling‘/
Sinus-wave / Measurement possible
"²'²² EEE
8
21.04.23
3. Dynamic Mechanical Analysis at PTS Heidenau
Moisture chamber Moisture chamber
RH sensorRH sensorair streaming moduleair streaming module
Sample holderSample holderSingle fibreSingle fibre
Tension membranTension membran
Force and displacement sensor insideForce and displacement sensor inside
Figure 7: moisture chamber with sample holder inside
Figure 8: sample holder with single fibre inside
9
21.04.23
4. First Results
- result of meassuring five fibres- frequency sweep (2 x 1-200-1 Hz)- Constant force 0,1N
10
20 % RH 50 % RH 80 % RH
E´ [Mpa] F [Hz] E´ [Mpa] F [Hz] E´ [Mpa] F [Hz]
min 9578.07 1.78 7145.07 1.78 5424.53 2.24
max 14117.3 44.7 12082.6 70.79 10976.2 70.79
difference 4539.23 4937.53 5551.67
21.04.23
Acknowledgement
- Prof. Pasi Kallio and the Micro- and Nanosystems Research Group of the TU Tampere
o Koroush Latifi
o Pooya Saketi
o Mathias von Essen
- Advisers at PTS Heidenau
o Dr. Stephan Daus
o Jens Kretzschmar
- COST FP 1105 action of the European Union
11
21.04.23
PTS Pulp Symposium
12
21.04.23
Thank you for your attention!
13
Top Related