3D Printing Pneumatic Channels with Dual Materials for Soft Robots: A Revolutionary Approach
Soft robotics has been a game-changer in the field of automation, offering a more flexible and adaptable approach to creating robotic systems. One of the key challenges in this field is adding motion to soft robotic actuators, which is where pneumatics come into play. However, incorporating pneumatics into soft robots can be a complex and time-consuming process.
A groundbreaking method demonstrated by Jackson K. Wilt and their team (https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202510141) showcases a novel approach to 3D printing that revolutionizes the creation of pneumatic channels in soft robots. This innovative technique involves extruding two materials: an elastomeric material and a fugitive ink, which is then used to create pneumatic channels. The unique aspect of this process is that the fugitive ink is dissolved after printing, leaving behind empty channels that can be filled with air.
The use of a rational, multi-material (RM-3DP) custom nozzle allows for the creation of various channel patterns, enabling precise control over the effect of compressed air on the elastomeric material. This level of customization opens up a world of possibilities for designing structures like hinges and muscles, which can be combined to create more complex and sophisticated robotic systems.
In the demonstration, the elastomeric material is a photopolymerizable polyurethane-acrylate resin, while the fugitive ink consists of 30 wt% Pluronic F-127 in water (https://www.thermofisher.com/order/catalog/product/P3000MP). The team first determines the desired pattern using simulations, followed by the printing and UV curing of the elastomeric resin. This meticulous process ensures that the final product meets the intended design specifications.
The resulting robots, while not designed for heavy lifting, offer a gentle and adaptable touch, making them ideal for applications that require a soft and customizable approach. The high level of customization in the printing process also makes these robots excellent candidates for artificial muscle designs, where the ability to fine-tune the material properties is crucial.
This innovative 3D printing technique not only simplifies the process of adding pneumatics to soft robots but also opens up new avenues for creating more sophisticated and adaptable robotic systems. With further research and development, we can expect to see even more remarkable advancements in the field of soft robotics, pushing the boundaries of what these robots can achieve.
