Tag: Soft Robotics

  • Researchers Create Fully Biodegradable Robotic Finger

    Researchers Create Fully Biodegradable Robotic Finger

    Key Takeaways

    1. The global electronic waste problem reached 62 million metric tons in 2022, exacerbated by the rise of soft robotics in healthcare and farming.
    2. Researchers have developed a fully biodegradable soft robotic system, including a robotic finger that meets industrial standards and decomposes naturally.
    3. The robot is made from polyglycerol sebacate, a biodegradable material, and includes electronic parts from naturally decomposing elements like magnesium and silicon.
    4. The compostable robotic fingers demonstrated high durability, maintaining strength and efficiency after over a million bends and force applications.
    5. The entire robotic system broke down in industrial composting conditions within months, and the compost was confirmed non-toxic by successfully growing oats.

    With the world facing a massive electronic waste problem of 62 million metric tons in 2022, the swiftly growing field of soft robotics in areas like healthcare and farming risks making this situation even worse. Conventional soft robots are made from complicated layers of permanent plastics, metal alloys, and semiconductors, which makes them nearly impossible to recycle or naturally break down.

    Innovative Approach to Design

    To tackle this unsustainable design challenge, a global team of researchers has developed a fully biodegradable soft robotic system. According to a study in the journal Nature Sustainability, the scientists created a robotic finger that not only meets rigorous industrial standards but also completely returns to nature after its life cycle ends.

    New Materials, New Possibilities

    Rather than using typical plastics, the team constructed the robot’s body using polyglycerol sebacate, a super elastic, water-free, and biodegradable material resembling rubber. They embedded twenty-one specialized electronic parts made from naturally decomposing elements like magnesium, molybdenum, and silicon directly within the finger.

    Historically, parts designed for sustainability have struggled with reliability. However, these new compostable fingers showed impressive durability, bending and applying force over a million times without losing their structural strength or mechanical efficiency.

    Eco-Friendly Confirmation

    When the robot’s operational life came to an end, the researchers placed the entire setup in standard industrial composting conditions. Within a few months, the flexible body and internal electronics had completely broken down. To ensure the system was genuinely eco-friendly, the team planted oats in the compost produced. The seeds sprouted and thrived, indicating that the dissolved robotic materials were entirely non-toxic.

    By combining high-performance engineering with complete ecological safety, this groundbreaking technology sets a new benchmark for sustainable machinery.

    Nature Sustainability via TechXplore

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  • Artificial Muscle Supports 4,000x Weight and Stretches 12x Length

    Artificial Muscle Supports 4,000x Weight and Stretches 12x Length

    Key Takeaways

    1. Researchers at UNIST created a new soft artificial muscle that can switch between being soft and strong.
    2. The muscle can hold up to 4,000 times its weight when rigid and stretch up to 12 times its original length when flexible.
    3. The innovation addresses a key challenge in soft robotics, combining flexibility with strength using a “dual cross-linked” polymer network.
    4. Magnetic microparticles are incorporated for precise movement control through an external magnetic field, allowing a wide range of stiffness.
    5. The muscle shows high performance with an actuation strain of over 86.4% and a work density 30 times greater than human muscle tissue.

    A team of researchers, headed by Professor Hoon Eui Jeong at UNIST, has created a new kind of soft artificial muscle. This innovative muscle can change from being soft and bendable to being tough and strong. This breakthrough addresses a significant challenge that has hindered advancements in soft robotics. The findings have been published in the journal Advanced Functional Materials. Remarkably, a sample weighing 1.25 grams can hold up to 4,000 times its weight when rigid and can stretch up to 12 times its original length when flexible.

    Solving a Major Challenge

    The newly developed actuator aims to tackle a core issue in soft robotics: artificial muscles are often either very flexible but weak or strong yet stiff. The team at UNIST managed to create a solution by designing a “dual cross-linked” polymer network. This innovative structure utilizes strong, permanent covalent bonds to maintain mechanical strength, while also incorporating dynamic physical interactions that can be changed with heat, allowing for flexibility.

    Advanced Control Mechanisms

    Additionally, the researchers mixed in magnetic microparticles within the polymer, which allows for precise manipulation of the muscle’s movements using an external magnetic field. This design enables the material to have a broad range of stiffness, varying from 0.213 MPa to 292 MPa.

    When the muscle contracts, it achieves an actuation strain of more than 86.4% and a work density of 1,150 kJ/m3. This is an exceptionally high value for a soft artificial muscle and is about 30 times more than that of human muscle tissue. If this new polymer is successfully developed and implemented, we might eventually see much more powerful and flexible humanoid robots.

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  • 3D-Printed Robots Walk Off Production Line: A New Era in Tech

    3D-Printed Robots Walk Off Production Line: A New Era in Tech

    Key Takeaways

    1. Robotics encompasses more than just traditional mechanical machines; it includes soft robots made from flexible and organic materials.
    2. Soft robots can be designed with internal fluidics for movement and can start operating immediately after 3D printing.
    3. The University of Edinburgh’s team claims to offer the most cost-effective soft robot production method, using a low-cost Flex printer.
    4. The Flex printer is user-friendly, compact, and designed for open-source production, making it accessible for various users.
    5. The soft robots created through this approach are expected to be versatile and beneficial in industries like healthcare and manufacturing.

    Robotics is seen as a field that holds great promise for the future, though it might not always involve the mechanical walking machines we typically imagine in discussions.

    A Different Approach

    In reality, various research groups within this field propose a different vision: robots constructed entirely from flexible, organic, or even biomimetic materials. These robots are designed with geometric shapes that utilize internal fluidics to drive their movements. This fluidic system can be integrated into the robots during manufacturing, ensuring they move as their creators planned.

    Advancements in Soft Robotics

    Often referred to as “soft robots,” these innovative creations can be produced using 3D printing techniques. Remarkably, they can begin their movements almost immediately after the printing process is completed. The concept of creating soft robots that can move in this way isn’t particularly new, as evidenced by research from teams like Zhai et al., published in Advanced Systems Intelligence in 2023.

    Cost-Effective Solutions

    However, the group led by Maks Gepner from the University of Edinburgh’s School of Engineering claims that their approach is the most affordable available so far. They utilize the open-source Flex platform for 3D printing, which can necessitate an investment of as low as $500. This Flex printer is also recognized for being the most accessible form of soft robot production, designed to fit on a desk while being user-friendly.

    Gepner, along with his teammates Jonah Mack and Adam A. Stokes, plans to share their robots through an open-source model, creating a Github repository with CAD files available for everyone.

    The soft robots produced by this new method are expected to be adaptable, sturdy, and advantageous across various sectors, including industry and healthcare, positively impacting the world as a whole.

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