- Self-Healing of Poly(vinyl Alcohol)/Poly(acrylic Acid)−Polytetrahydrofuran−Poly(acrylic Acid) Blend Boosted via Shape Memory
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- 所属单位：化学工程学院
- 发表刊物：Langmuir
- 项目来源：省、市、自治区科技项目
- 关键字：shape memory polymer
- 摘要：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.
- 合写作者：任亚君,宋晓峰
- 第一作者：宋晓峰
- 论文类型：期刊论文
- 卷号：39
- 页面范围：1
- 是否译文：否
- 发表时间：2023-10-04
