Smart Structures via 4D printing of Hydrogel Materials

Nahin Islam Shiblee

Hydrogel actuators with soft-robotic capabilities and biomimetic advanced materials with simple and programmable fabrication processes are still in scarce. We describe a novel method for constructing a shape-memory-hydrogel-based bilayer system via 3D printing, resulting in a soft actuator that responds to methodical application of swelling and heat. Additionally,

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The 4D Printing Society is Content partner of the 4D Printing & Meta Materials Conference

society

The 4D Printing Society is a platform focused on available 4D printing technologies for practical solutions for existing needs and researching future methods and materials for use with these technologies.
To clarify: 4D printing is using computerized printing technologies to 3D print objects using specialist materials that change shape, properties, and functions in time when exposed to a specific stimulus.

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4D printing or not 4D printing? Mechanically actuatable 3D scaffolds for regenerative medicine

Lorenzo Moroni

by Lorenzo Moroni, MERLN, Maastricht University

A key factor in scaffold-based tissue and organ regeneration relies on enhancing (stem) cell-material interactions to obtain the same original functionality. A possible way to build in functionality at the interface between materials and cells can be offered by 4D (bio)printing. Whether we are really witnessing 4D printing, a process which should be defined when the programmed temporal shape change happens during the 3D manufacturing itself, or not is still to be clarified in the field.

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Utilising Parametric Customisation to Translate Auxetic Structure Theory into Additively Manufactured Multimaterial Performative Geometries

Brittany Mark

presentation by Brittany Mark, Victoria University of Wellington at online 4D Printing & Meta Materials Conference, May 26, 2020, 09:00 – 12:00 CET.

Auxetic Structures are a class of Metamaterials uniquely characterised by their Negative Poissons Ratio, that is when a lateral force is applied they expand longitudinally, becoming thicker and stronger, perpendicular to the strain. This counterintuitive behaviour has many enhanced behavioural properties, our research has specifically focused on their response to impact forces for sports protection scenarios.

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The effect of 4D printed internal structure on the shape memory effect of shape memory polymers

Jiwoo Choi

by Jiwoo Choi, Dyson School of Design Engineering, Imperial College London

One way to 4D print is through the use of Shape Memory Polymers (SMP). these are a type of polymer which react to an external stimulus (e.g. temperature) and subsequently change their shape in a programmed manner. Previous 4D printing research has focused on different material properties (chemistry) or geometric shape (size, thickness etc.) to control its morphing behaviour.

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Dynamic Mechanical Metamaterials – Presented by David Dykstra, University of Amsterdam

David Dykstra

Dynamic Mechanical Metamaterials – Presented by David Dykstra, University of Amsterdam, at 4D Printing & Meta Materials Conference, on April 17, during the 3D Printing Event at Brightlands Chemelot Campus in The Netherlands.

In years, mechanical metamaterials has surged as a field of research, with many new concepts developed.

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