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Metallic-Ion Controlled Dynamic Bonds to Co-Harvest Isomerization Energy and Bond Enthalpy for High-Energy Output of Flexible Self-Heated Textile. | LitMetric

AI Article Synopsis

  • Molecular light-harvesting and low-temperature heat production are crucial for creating self-heated textiles that are flexible and efficient.
  • This study investigates sulfonic-grafted azobenzene-based polymers with various metal ions to enhance energy storage and optimize isomerization kinetics.
  • The polymer PAzo-Mg demonstrates the highest energy storage density and can significantly increase temperature in low environments, paving the way for innovative wearable thermal management devices.*

Article Abstract

Molecular light-harvesting capabilities and the production of low-temperature heat output are essential for flexible self-heated textiles. An effective strategy to achieve these characteristics is to introduce photoresponsive molecular interactions (photodynamic bonds) to increase the energy storage capacity and optimize the low-temperature photochromic kinetics. In this study, a series of sulfonic-grafted azobenzene-based polymers interacted with different metal ions (PAzo-M, M = Mg, Ca, Ni, Zn, Cu, and Fe) to optimize the energy level and isomerization kinetics of these polymers is designed and prepared. Photoinduced formation and dissociation of MO dynamic bonds enlarge the energy gap (∆E) between trans and cis isomers for high-energy storage and favor a high rate of isomerization for low-temperature heat release. The suitable binding energy and high ∆E enable PAzo-M to store and release isomerization energy and bond enthalpy even in a low-temperature (-5 °C) environment. PAzo-Mg possesses the highest energy storage density of 408.6 J g (113.5 Wh kg ). A flexible textile coated with PAzo-Mg can provide a high rise in temperature of 7.7-12.5 °C in a low-temperature (-5.0 to 5.0 °C) environment by selectively self-releasing heat indoors and outdoors. The flexible textile provides a new pathway for wearable thermal management devices.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9284279PMC
http://dx.doi.org/10.1002/advs.202201657DOI Listing

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