International Seminar Series on Programmable Materials

virtual events in Summer 2021

International Seminar Series on Programmable Materials

International Seminar  /  September 02, 2021

How the stereolithography technique can revolutionize the design of Soft Polymeric Materials for Multiple Purposes

Ph.D. Jean-Marie Raquez, Université de Mons, Belgium

Location

Online via MS Teams

Date

September 02, 2021

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How the stereolithography technique can revolutionize the design of Soft Polymeric Materials for Multiple Purposes Thursday, 2 September 2021, 1 - 2.30 p.m. (CEST)

Ph.D. Jean-Marie Raquez, Université de Mons, Belgium (webpage)

Slowly yet steadily, additive manufacturing technologies have become a major player in the fabrication of polymeric devices with controlled architectures such as personalized prototypes, soft electronics, sensors and actuators as well as tissue and biomedical engineering. Based on a layer by layer fabrication, with resolution in the range of micro- to nanometers per layer, the computer-assisted printing significantly speeds up the development of custom 3D devices without actually inflating the costs. Despite the irrefutable progress made around 3D printing, the technique still suffers from rigid and static properties of the printed parts and lack of fabrication approaches controlling the material anisotropy. In light of these limitations, a breakthrough strategy towards designing anisotropy-encoded structures using commercial stereolithography technology is reported by means of controlling either the specific surface area to volume ratio, the crosslinking density or the chemical composition of discrete layers during fabrication. The key element here is the time, where the actuation, the sensing and the programmability are directly embedded into the material structure and occur in desired time frames. More precisely, we address the challenge of building more complex 3D objects with elevated adaptive properties towards the 3D-printing of e.g. multi-responsive actuators, piezoionic touch sensors and rapid responsive visible indicators. This work represents a flexible platform for designing more advanced 3D-printed polymeric materials beyond the present study that would promote new potential applications.

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International Seminar  /  October 14, 2021

HASEL Artificial Muscles - Versatile High-Performance Actuators for a New Generation of Lifelike Robots

Prof. Dr. Christoph Keplinger, Max Planck Institute for Intelligent Systems, Germnay

Location

Online via MS Teams

Date

October 14, 2021

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HASEL Artificial Muscles - Versatile High-Performance Actuators for a New Generation of Lifelike Robots Thursday, 14 October 2021, 3 - 4.30 p.m. (CEST)

Prof. Dr. Christoph Keplinger, Max Planck Institute for Intelligent Systems, Germnay (webpage)

Robots today rely on rigid components and electric motors based on metal and magnets, making them heavy, unsafe near humans, expensive and ill-suited for unpredictable environments. Nature, in contrast, makes extensive use of soft materials and has produced organisms that drastically outperform robots in terms of agility, dexterity, and adaptability. The Robotic Materials Department at the Max Planck Institute for Intelligent Systems aims to fundamentally challenge current limitations of robotic hardware, using an interdisciplinary approach that synergizes concepts from soft matter physics and chemistry with advanced engineering technologies to introduce robotic materials – material systems that integrate actuation, sensing and even computation – for a new generation of intelligent systems. One major theme of research is the development of new classes of actuators that replicate the astonishing all-around actuation performance of biological muscle, as well as its ability to self-heal after damage, and seamless integration with sensing.

This talk is focused on HASEL artificial muscles, a technology recently introduced by the lab. Hydraulically Amplified Self-healing Electrostatic (HASEL) transducers are a new class of self-sensing, high-performance muscle-mimetic actuators, which are electrically driven and harness a mechanism that couples electrostatic and hydraulic forces to achieve a wide variety of actuation modes. Current designs of HASEL are capable of exceeding actuation stress of 0.3 MPa, linear strain of 100%, specific power of 600W/kg, full-cycle electromechanical efficiency of 30% and bandwidth of over 100Hz; all these metrics match or exceed the capabilities of biological muscle. This presentation gives an overview over the latest developments, including new designs of actuators, fabrication techniques, and untethered soft robotic devices powered by portable electronic systems. Modeling results predict the impact of material parameters and scaling laws of these actuators, laying out a roadmap towards future HASEL actuators with drastically improved performance. These results highlight future opportunities for both fundamental and applied research to further develop HASEL artificial muscles for wide use in next-generation robots that replicate the vast capabilities of biological systems.

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International Seminar  /  February 10, 2022

-Title to be announced-

Prof. Veronika Aumann, Staatliche Akademie der Bildenden Künste, Stuttgart, Germany

Location

Online via MS Teams

Date

February 10, 2022

Programme

DATE sPEAKER tOPIC / Title Join Meeting
Thursday, 20 May 2021, 4 - 5.30 p.m. (CEST) Prof. Dr. Dr.h.c. Peter Fratzl, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany (webpage Local fibre orientations control the behaviour of biological materials The talk has already taken place.
Thursday, 10 June 2021, 3 - 4.30 p.m. (CEST) Prof. Dr. Thomas Speck, University of Freiburg, Germany (webpage) Adaptive pre-programmed, interactive plant material systems and structures as models for novel technical developments The talk has already taken place.
Thursday, 01 July 2021, 3 - 4.30 p.m. (CEST) Prof. Caroline A. Ross, Massachusetts Institute of Technology, USA (webpage) Programmable Nanostructures by Directed Self-assembly of Block Copolymers The talk has already taken place.
Thursday, 2 September 2021, 1 - 2.30 p.m. (CEST) Ph.D. Jean-Marie Raquez, Université de Mons, Belgium (webpage) How the stereolithography technique can revolutionize the design of Soft Polymeric Materials for Multiple Purposes Click here
(Link to MS Teams meeting)
Thursday, 14 October 2021, 3 - 4.30 p.m. (CEST) Prof. Dr. Christoph Keplinger, Max Planck Institute for Intelligent Systems, Germany (webpage)
HASEL Artificial Muscles - Versatile High-Performance Actuators for a New Generation of Lifelike Robots Click here
(Link to MS Teams meeting)
Thursday, 10 February 2022, 3 - 4.30 p.m. (CEST) Prof. Veronika Aumann, Staatliche Akademie der Bildenden Künste, Stuttgart, Germnay (webpage) -Title to be announced- -Coming soon-

Agenda

 

  • Welcome and short introduction by member of Fraunhofer CPM (c. 10 minutes)
  • Talk (c. 45 minutes)
  • Discussion (c. 35 minutes)

You are invited to take actively take part in the discussion. Please note that the talk itself will be recorded and used for internal purposes afterwards.

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Programmable materials are materials or material compositions, which are structured such that their properties can be specifically controlled and reversibly changed. Complex and locally different functions can be programmed into these materials.

Depending on the application and situation, the material then adopts different conditions and material properties initiated by external triggers.

 

Programmed = fixed functionality programmed into material during fabrication

Programmable = adaption of function during application

 

Programmable materials introduce a unique potential for new system solutions because they themselves adopt important system functionalities, thus making additional system components such as sensors or actuators redundant.

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Prof. Dr. Alexander Böker

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Prof. Dr. Chris Eberl

 

Scientific Coordinator of Fraunhofer CPM

Deputy Director of Fraunhofer IWM

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Isabelle Binninger

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