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<p>Shape memory polylactic acid (PLA)/polyethylene glycol (PEG) films with controllable thermal response temperature and dual-responsive function were developed. The developed PLA/PEG film exhibits excellent shape memory performance and can recover to its initial shape within 6 s. The shape memory PLA/PEG films achieved controllable thermal response temperature by physically modifying PLA with PEG. Compared with P-P0 (pure PLA), the thermal response temperature of P-P10 (PLA/PEG film with a mass ratio of 10/1 of PLA to PEG) was reduced by 20&#xa0;°C. Based on the differences in thermal response temperature of PLA/PEG films with different PEG contents, PLA/PEG bilayer films have achieved dual-responsive shape memory function. Moderate PEG improved the mechanical properties of PLA/PEG films. Compared with P-P0, Young's modulus, breaking stress, and breaking strain of P-P10 increased by 113 MPa, 7.8 MPa, and 15.2 MPa, respectively. The thermal performance of PLA/PEG films can be controlled by PEG content. Compared with P-P0, the glass transition temperature, cold crystallization temperature, melting temperature, and thermal decomposition temperature of P-P10 are reduced by 9.8&#xa0;°C, 13.8&#xa0;°C, 0.6&#xa0;°C, and 7.5&#xa0;°C, respectively. In summary, the developed shape memory PLA/PEG films have controllable response temperature, dual-responsive function, and improved mechanical properties, showing promising application prospects in the field of flexible intelligent biomaterials.</p> Graphical Abstract <p></p>

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Development of shape memory PLA with controllable stimulation temperature and dual-responsive properties by adding PEG

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Baoji Hu,
  • Yirui Chen,
  • Manman Zhai,
  • Mengying Li,
  • Yike Peng,
  • Feiyang Xu,
  • Yifan Zhang,
  • Jianhong Liu,
  • Weili Shao,
  • Qiaoling Zhang

摘要

Shape memory polylactic acid (PLA)/polyethylene glycol (PEG) films with controllable thermal response temperature and dual-responsive function were developed. The developed PLA/PEG film exhibits excellent shape memory performance and can recover to its initial shape within 6 s. The shape memory PLA/PEG films achieved controllable thermal response temperature by physically modifying PLA with PEG. Compared with P-P0 (pure PLA), the thermal response temperature of P-P10 (PLA/PEG film with a mass ratio of 10/1 of PLA to PEG) was reduced by 20 °C. Based on the differences in thermal response temperature of PLA/PEG films with different PEG contents, PLA/PEG bilayer films have achieved dual-responsive shape memory function. Moderate PEG improved the mechanical properties of PLA/PEG films. Compared with P-P0, Young's modulus, breaking stress, and breaking strain of P-P10 increased by 113 MPa, 7.8 MPa, and 15.2 MPa, respectively. The thermal performance of PLA/PEG films can be controlled by PEG content. Compared with P-P0, the glass transition temperature, cold crystallization temperature, melting temperature, and thermal decomposition temperature of P-P10 are reduced by 9.8 °C, 13.8 °C, 0.6 °C, and 7.5 °C, respectively. In summary, the developed shape memory PLA/PEG films have controllable response temperature, dual-responsive function, and improved mechanical properties, showing promising application prospects in the field of flexible intelligent biomaterials.

Graphical Abstract