Self-Healing of Poly(vinyl Alcohol)/Poly(acrylic Acid)−Polytetrahydrofuran−Poly(acrylic Acid) Blend Boosted via Shape Memory

Release time:2023-12-18  Hits:

• Affiliation of Author(s):化学工程学院
• Journal:Langmuir
• Funded by:省、市、自治区科技项目
• Key Words:shape memory polymer
• Abstract:The self-healable polymers that can repair physical damage autonomously to extend their lifetime and reduce maintenance costs are promising intelligent materials. However,utilizing shape memory to facilitate self-repair is unusual at present. In this work, a series of poly(acrylic acid)−polytetrahydrofuran−poly(acrylic acid) polymers (PAA−PTMG−PAA, diPAA−PTMG) are synthesized as a switching phase and healing accelerator to blend into poly(vinyl alcohol) (PVA). The water swelling rate of the blend is up to 400.0% at 1/1 molecular weight ratio of PTMG/PAA and 20.0 wt % blend ratio of diPAA−PTMG to PVA, and its crystallization is changed significantly under wet conditions. The blend membrane exhibits not only a good hydrothermal-response shape memory effect but also a favorable self-healing behavior. The tensile strength and elongation at break are 12.4 MPa and 320.0% after healing at 25 °C, respectively. In particular, the wound membrane can achieve a better self-healing effect with the assistance of shape memory at 37 °C, and the elongation at the break increased to 515.9% after healing. The membrane is not cytotoxic, so it will be a promising biomedical material.
• Co-author:任亚君,宋晓峰
• First Author:songxiaofeng
• Indexed by:Journal paper
• Volume:39
• Page Number:1
• Translation or Not:no
• Date of Publication:2023-10-04