Abstract Shape memory hybrids (SMH) have drawn significant attention because they allow an easy alternative for the design of shape memory materials with tailored properties or features. In this work, a shape memory hybrid was made, based on polyvinyl alcohol (PVA) as the elastic domain and 0D silver nanoparticles (Agnps) as the transition domain, a dissolution method of mixing both components, and evaporation of water afterward allowed the formation of films of the hybrid material. Two different size distributions of silver nanoparticles were used (13.7 ± 2.6 and 67.9 ± 14.1 nm), in order to study the effect of the size on the shape memory effect (SME) of the final SMH, under temperature stimuli. The materials obtained were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy, infrared spectroscopy (IR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. The crystallinity of PVA was slightly altered with the addition of Agnps. Finally, the shape memory effect was tested on both hybrid materials, resulting in a better response to temperature for the SMH prepared with Agnps of 68 nm, also the shape recovery time can be tuned varying both the increase of temperature and the size distribution of Agnps used.

中文翻译：

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基于聚乙烯醇和 0D 银纳米粒子的形状记忆混合物

摘要 形状记忆混合材料 (SMH) 引起了极大的关注，因为它们为设计具有定制特性或特征的形状记忆材料提供了一种简单的替代方案。在这项工作中，基于聚乙烯醇 (PVA) 作为弹性域和 0D 银纳米粒子 (Agnps) 作为过渡域，制备了一种形状记忆混合体，将两种成分混合的溶解方法，然后蒸发水允许形成混合材料的薄膜。使用两种不同尺寸分布的银纳米颗粒（13.7 ± 2.6 和 67.9 ± 14.1 nm），以研究尺寸对温度刺激下最终 SMH 的形状记忆效应 (SME) 的影响。获得的材料使用扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、能量色散 X 射线光谱 (EDS)、X 射线光电子能谱、红外光谱 (IR)、差示扫描量热法 (DSC) 和热重分析 (TGA) 技术。随着 Agnps 的加入，PVA 的结晶度略有改变。最后，在两种混合材料上测试了形状记忆效应，导致用 68 nm 的 Agnps 制备的 SMH 对温度的响应更好，而且形状恢复时间可以随着温度的增加和 Agnps 的尺寸分布而调整用过的。