Hanyang University announced on April 4 that a 프리미엄 토토 team led by Professor Choi Chang-soon and Professor Kim Seon-jeong from the Department of Biomedical Engineering has developed multifunctional hydro-actuators that effectively control structural instability.

Conventional artificial muscles have improved actuation performance through "coiled structures" created by twisting fibers like springs. However, excessive twisting during the fabrication process has been identified as a chronic problem causing structural instability, including structural collapse or unwinding phenomena. This has required additional external fixation devices or complex designs, limiting practical applications.

In response, the Hanyang University 프리미엄 토토 team developed a novel anchoring technique by injecting PEDOT:PSS, a bipolar polymer material, into carbon nanotube bundles. This creates tight inter-bundle fixation, effectively controlling structural distortion. The hydro-actuators fabricated using this method demonstrated twist retention of 97.5% or more without external fixation devices and maintained stable performance even after up to 1,000 repeated actuations.

Additionally, the 프리미엄 토토 team applied electrothermal moisture removal using Joule heating to improve the operation cycle by approximately 5-fold compared to existing methods. Furthermore, by leveraging the pseudo-capacitance characteristics of the polymer material, they implemented electrical energy storage functionality within the artificial muscle, transforming it into a multifunctional system that goes beyond simple actuation.

Professor Choi stated, "This research has great significance in presenting a new form of artificial muscle that integrates structural stability, precise control, and energy storage functionality, going beyond the simple mechanical movement provided by conventional artificial muscles," adding, "This technology can be practically applied to various fields such as soft robotics, smart clothing, and humidity-responsive sensors in the future."

The research was conducted with support from the Ministry of Science and ICT and the National Research Foundation of Korea, and was published in March 2025 in "Advanced Functional Materials (IF=18.5)," a leading international journal in materials science. The research paper "Leveraging Inter-bundle Anchoring Effect to Induce Static and Dynamic Twist-Stability in Multifunctional Carbon Nanotube Coiled Yarn Hydro-Actuators" includes doctoral candidate Lee Jae-myeong as the first author, and Professor Kim Seon-jeong and Professor Choi Chang-soon as corresponding authors.