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Preparation of Single Pulp Fibres for Dynamic Mechanical Analyses Using a Microrobotic Platform Trabzon, 09.10.2013Steffen Baasner.

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Presentation on theme: "Preparation of Single Pulp Fibres for Dynamic Mechanical Analyses Using a Microrobotic Platform Trabzon, 09.10.2013Steffen Baasner."— Presentation transcript:

1 Preparation of Single Pulp Fibres for Dynamic Mechanical Analyses Using a Microrobotic Platform Trabzon, Steffen Baasner

2 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

3 Purpose of The Short Term Scientific Mission (STSM) Paper Single Fibre Fibre Bonds -Preparation (STSM) -measurement 3

4 Micro Robotic Platform and Preparation of Single Fibres at Technical University Tampere Figure 1: microrobotic platform at TUT platform Side view camera Top view camera 4

5 Micro Robotic Platform and Preparation of Single Fibres at Technical University Tampere Steps 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 Rotary table XY – table Microgrippers XYZ – Micropositioners Figure 2: function unities of the platform Saketi, Pooya et al. (2012), Journal of Microscopy, Vol. 248, page 167 5

6 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 plateFigure 5: on one end glued fibre 6

7 Dynamic Mechanical Analysis at PTS Heidenau Figure 6: Dynamic Mechanical Analyzer (DMA) Applied load - tension or shear (sinusoidal ) - force N - frequency Hz - amplitude 5 nm..1.6 mm Environmental parameters - temperature (-150…500 °C) - relative humidity (10…90 %) at room temperature 7

8 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 Storage modulus Loss modulus Damping Result of Measurement: Calculation 3.Dynamic Mechanical Analysis at PTS Heidenau 2. Static stretching: No ‚Buckling‘/ Sinus-wave / Measurement possible 8

9 Dynamic Mechanical Analysis at PTS Heidenau Moisture chamber RH sensor air streaming module Sample holder Single fibre Tension membran Force and displacement sensor inside Figure 7: moisture chamber with sample holder inside Figure 8: sample holder with single fibre inside 9

10 First Results -result of meassuring five fibres -frequency sweep (2 x Hz) -Constant force 0,1N % RH 50 % RH 80 % RH E´ [Mpa]F [Hz]E´ [Mpa]F [Hz]E´ [Mpa]F [Hz] min max difference

11 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

12 PTS Pulp Symposium 12

13 Thank you for your attention! 13


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