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<p>Biodegradable and biocompatible organic polymers play a pivotal role in designing the next generation of wearable smart electronics, reducing electronic waste and carbon emissions while promoting a toxin-free environment. Herein, an electrospun fibrous polyhydroxybutyrate (PHB) organic mat-based, energy-autonomous, skin-adaptable temperature sensor is developed, eliminating the need for additional storage or circuit components. The electrospun PHB mat exhibits an enhanced β-crystalline phase with a <i>β</i>/<i>α</i> phase ratio of 3.96 using 1,1,1,3,3,3-hexafluoro-2-propanol as a solvent. Solvent and film processing techniques were tailored to obtain high-quality PHB films with the desired thickness, flexibility, and phase conversion. The PHB mat-based temperature sensor (PHB–TS) exhibits a negative temperature coefficient of resistance, with a sensitivity of − 2.94%/°C and a thermistor constant of 4676&#xa0;K, outperforming pure metals and carbon-based sensors. A triboelectric nanogenerator (TENG) based on the enhanced β-phase PHB mat was fabricated, delivering an output of 156&#xa0;V, 0.43 µA, and a power density of 1.71 mW/m<sup>2</sup>. The energy-autonomous PHB–TS was attached to the index finger to monitor temperature changes upon contact with hot and cold surfaces, demonstrating good reliability and endurance.</p> Graphical Abstract <p></p>

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Tunable Phase-Engineered Polyhydroxybutyrate Fibrous Mat: An Energy Autonomous, Temperature-Responsive Platform for Wearable Application

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Kusum Sharma,
  • Nagamalleswara Rao Alluri,
  • Asokan Poorani Sathya Prasanna,
  • Muthukumar Perumalsamy,
  • Anandhan Ayyappan Saj,
  • Yeonkyeong Ryu,
  • Ju-Hyuck Lee,
  • Kwi-Il Park,
  • Sang-Jae Kim

摘要

Biodegradable and biocompatible organic polymers play a pivotal role in designing the next generation of wearable smart electronics, reducing electronic waste and carbon emissions while promoting a toxin-free environment. Herein, an electrospun fibrous polyhydroxybutyrate (PHB) organic mat-based, energy-autonomous, skin-adaptable temperature sensor is developed, eliminating the need for additional storage or circuit components. The electrospun PHB mat exhibits an enhanced β-crystalline phase with a β/α phase ratio of 3.96 using 1,1,1,3,3,3-hexafluoro-2-propanol as a solvent. Solvent and film processing techniques were tailored to obtain high-quality PHB films with the desired thickness, flexibility, and phase conversion. The PHB mat-based temperature sensor (PHB–TS) exhibits a negative temperature coefficient of resistance, with a sensitivity of − 2.94%/°C and a thermistor constant of 4676 K, outperforming pure metals and carbon-based sensors. A triboelectric nanogenerator (TENG) based on the enhanced β-phase PHB mat was fabricated, delivering an output of 156 V, 0.43 µA, and a power density of 1.71 mW/m2. The energy-autonomous PHB–TS was attached to the index finger to monitor temperature changes upon contact with hot and cold surfaces, demonstrating good reliability and endurance.

Graphical Abstract