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<p>In this study, microgel beads (µECH: micro electrosprayed sodium alginate CNT-hydrogel) incorporating carbon nanotubes (CNTs) were fabricated via electrospraying, and their desalination performance was evaluated. Miniaturizing hydrogels maximized their surface area-to-volume ratio, enhancing desalination performance, while a uniform CNT distribution improved light absorption efficiency. The resulting µECH demonstrated an approximately 3 times improvement in evaporation efficiency compared with macroscale hydrogel beads. Moreover, hydrogels containing 75-µL CNTs achieved an evaporation rate of 0.187 kgm<sup>−2</sup>h<sup>−1</sup>, representing a 2.1 times improvement over their counterparts without CNTs. These improvements are attributed to the optimization of hydrogel microstructure and efficient light absorption characteristics of the incorporated CNTs.</p>

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Multiscale mechanics of CNT-infused mass-producible micro hydrogels for solar–thermal water evaporation

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Jong-hyeok Bae,
  • Woo-young Jang,
  • Minkyu Song,
  • Minhwan Lee,
  • Seoung Jai Bai

摘要

In this study, microgel beads (µECH: micro electrosprayed sodium alginate CNT-hydrogel) incorporating carbon nanotubes (CNTs) were fabricated via electrospraying, and their desalination performance was evaluated. Miniaturizing hydrogels maximized their surface area-to-volume ratio, enhancing desalination performance, while a uniform CNT distribution improved light absorption efficiency. The resulting µECH demonstrated an approximately 3 times improvement in evaporation efficiency compared with macroscale hydrogel beads. Moreover, hydrogels containing 75-µL CNTs achieved an evaporation rate of 0.187 kgm−2h−1, representing a 2.1 times improvement over their counterparts without CNTs. These improvements are attributed to the optimization of hydrogel microstructure and efficient light absorption characteristics of the incorporated CNTs.