AI Article Synopsis

  • This study explores a new type of polymeric microwave actuator that combines softness with the ability to deform under microwave stimulation, making it suitable for use in advanced devices like soft robots.
  • The researchers created a hybrid material using liquid crystal polymer and TiCT (MXene), which dramatically improved the material's sensitivity and energy efficiency, leading to a 230% increase in dielectric loss factor and a 830% boost in energy harvesting efficiency.
  • The new actuator demonstrates a rapid response time of nearly 10 seconds and includes a self-powered sensing prototype that provides real-time feedback, offering innovative pathways for efficient electromagnetic applications in smart technologies.

Article Abstract

Polymeric microwave actuators combining tissue-like softness with programmable microwave-responsive deformation hold great promise for mobile intelligent devices and bionic soft robots. However, their application is challenged by restricted electromagnetic sensitivity and intricate sensing coupling. In this study, a sensitized polymeric microwave actuator is fabricated by hybridizing a liquid crystal polymer with TiCT (MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique space-charge polarization and interfacial polarization, resulting in significant improvements of 230% in the dielectric loss factor and 830% in the apparent efficiency of electromagnetic energy harvest. The sensitized microwave actuation demonstrates as the shortened response time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (up to 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combines driving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) during actuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approach for developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11573944PMC
http://dx.doi.org/10.1007/s40820-024-01578-zDOI Listing

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