BBS:      TELESC.NET.BR
Assunto:  3D printing robotic "muscle"
De:       Mike Powell
Data:     Sun, 15 Feb 2026 12:53:15 -0500
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Is this the beginning of the end for humanity? Slightly terrifying 3D printing
breakthrough means we can now print robotic 'muscle'

By Efosa Udinmwen published 5 hours ago

Speed and simplicity raise safety, oversight, and ethical concerns

    Harvard engineers created robotic muscles using rotational multi-material
3D printing techniques
    Hollow polyurethane tubes filled with air or fluid allow pre-programmed
movement
    A spiral actuator unfurls while a gripper curls fingers around objects

A team of engineers at Harvard has developed a 3D printing technique that
allows fully flexible structures to twist, bend, or lift on demand, creating
what researchers describe as robotic "muscle."

The method, called rotational multi-material 3D printing, merges several
printing methods and enables the simultaneous deposition of multiple materials
through a single nozzle that rotates continuously while printing.  This allows
precise control over how materials interact, producing hollow tubes that can be
pressurized to generate movement in a preprogrammed way.

How the printing method works

The technique uses a strong outer layer of polyurethane to protect an interior
gel-like polymer called poloxamer.  Once the print is finished, the interior
gel is removed to leave hollow tubes that act as actuators capable of twisting
or bending when filled with air or fluid.

The researchers demonstrated the process using a spiral, flower-like actuator
that unfurls when inflated and a hand-like gripper capable of curling its
fingers around objects.

The nozzle's design, rotation speed, and material flow are calibrated to
determine exactly how the printed structure will move, allowing motion logic to
be integrated directly during printing.

Traditional soft robotics requires casting individual components and assembling
them layer by layer, a process that is laborious and time-consuming. By
contrast, this 3D printing method can produce a complex, functional structure
in a single print, with movement logic encoded in the material itself.

The approach has potential implications for industrial-scale production,
potentially reducing both time and cost in the creation of malleable robotic
structures.

The researchers suggest it could accelerate innovation across sectors if scaled
successfully, from prosthetics to underwater construction.

But here comes the scary part... these robots could manipulate objects in
crowded or industrial environments, causing accidents if they fail or behave
unpredictably.

Widespread adoption of such highly adaptable robots in workplaces could also
accelerate job losses or even major industrial accidents if not properly
controlled.

These scenarios show why some may view the breakthrough's capabilities as
slightly terrifying.

While the breakthrough is impressive, the speed and simplicity of this method
raise questions about long-term safety and oversight.

There are also concerns about the ethical use of programmable robotic muscles
in human-adjacent environments.

Published in Advanced Materials, this technique is now subject to a filed
patent, but until it is successfully applied at an industrial scale or in
environments where human interaction is involved, its practical impact and
potential risks remain uncertain.



https://www.techradar.com/pro/security/slightly-terrifying-3d-printing-breakthr
ough-means-we-can-now-print-robotic-muscle-so-is-this-the-beginning-of-the-end-
for-humanity

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