What is 4D-printing?

The production of many companies increasingly requires flexible and localized production in order to respond to the market as quickly as possible, and 4D printing could be a major transformation in this. Mass production can be flexible and customized, costs and complexity of products can be reduced by allowing the products to take different forms during transport, storage and production. The adaptability of the products will provide new services and the overall developments of 4D printing will provide new approaches to business models and process strategy. In short, the arrival of 4D printing could help the entire industrial strategy to a higher level. An evolution in new production technology would also bring about a new way of thinking within companies, especially the way we perceive objects.

The use of 4D printing will change the way we view fundamental transformation functions. In particular, how it looks at bending, folding, twisting, expansion/contraction, property and change of state. This is done by using Nano composites and adding dimensions such as memory and time. The figure below shows the transformations that can take place with 4D printing.

Figure 1: Transformation functions enabled by 4D-printing

These transformations can materialize a one-way or two-way behavior of the object's state. This means that materials can now use shape memory (also called SMs) and return to their original shape in different states. In order for these reactions to take place, a stimulus in the form of energy must be provided as a trigger. This can take place using light, magnetic and electric fields, moisture, acidity, temperature, solvent and mechanical energy. There are therefore many different possibilities for the reaction of 4D printing to take place and this makes it a promising technique that is receiving a lot of attention from researchers worldwide.

Sources used in this post

The status, barriers, challenges, and future in design for 4D printing

More information about Technology 4D-printing:

Difficulties for 4D-printing

Expected future developments - Short term

Expected future developments - Long term