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<p>In this study, SAMB-Aox, a heat-sensitive shape memory polymer previously developed and characterized, was evaluated as a functional adsorbent in a solid-phase extraction (SPE) system for uranium recovery. The contribution of shape memory functionality was systematically examined by separating thermal and mechanical effects during adsorption and elution. While uranium adsorption efficiencies at 25 and 60&#xa0;min remained comparable regardless of shape recovery, a pronounced enhancement was observed during the elution stage. Activation of shape memory recovery enabled near-quantitative uranium elution, reaching a recovery of 94.7% within 60&#xa0;min, corresponding to an approximately twofold increase compared to non-shape-memory controls. In parallel, the required eluent volume was reduced from 40 to 20&#xa0;mL, and effective elution was achieved at shorter contact times. These improvements resulted in a substantially enhanced enrichment factor and accelerated SPE performance. The findings demonstrate that macroscopic shape recovery plays a decisive role in mechanically assisted desorption, providing a mechanistic insight into the behavior of stimuli-responsive sorbents.</p>

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Enrichment and sensitive determination of uranium (VI) by using a thermosensitive shape memory polymer

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Arslan Karaköse,
  • Orhan Hazer

摘要

In this study, SAMB-Aox, a heat-sensitive shape memory polymer previously developed and characterized, was evaluated as a functional adsorbent in a solid-phase extraction (SPE) system for uranium recovery. The contribution of shape memory functionality was systematically examined by separating thermal and mechanical effects during adsorption and elution. While uranium adsorption efficiencies at 25 and 60 min remained comparable regardless of shape recovery, a pronounced enhancement was observed during the elution stage. Activation of shape memory recovery enabled near-quantitative uranium elution, reaching a recovery of 94.7% within 60 min, corresponding to an approximately twofold increase compared to non-shape-memory controls. In parallel, the required eluent volume was reduced from 40 to 20 mL, and effective elution was achieved at shorter contact times. These improvements resulted in a substantially enhanced enrichment factor and accelerated SPE performance. The findings demonstrate that macroscopic shape recovery plays a decisive role in mechanically assisted desorption, providing a mechanistic insight into the behavior of stimuli-responsive sorbents.