A Thermal-, Water-, and Near-Infrared Light-Induced Shape Memory Composite Based on Polyvinyl Alcohol and Polyaniline Fibers
A Thermal-, Water-, and Near-Infrared Light-Induced Shape Memory Composite Based on Polyvinyl Alcohol and Polyaniline Fibers
复制标题
基于聚乙烯醇和聚苯胺纤维的热、水和近红外光诱导形状记忆复合材料
DOI：
10.1021/acsami.8b01425
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发表时间：
2018-04-25
影响因子：
9.5
通讯作者：
Chen, Xin
中科院分区：
文献类型：
--
作者：
Bai, Yongkang;Zhang, Jiwen;Chen, Xin
将聚苯胺（PAn）纤维引入聚乙烯醇（PVA）基体中，采用表面活性剂辅助原位聚合法将PAn纤维均匀分散于PVA基体中，制备了多响应形状记忆复合材料。PAn纤维不仅增加了体系中的物理交联点，而且作为光热转化剂，使复合材料具有优异的水、热和近红外光（NIR）光致形状记忆性能，其中PAn负载量和光功率密度的增加可提高复合材料的光致形状恢复率和速度。复合材料具有较高的力学性能，拉伸强度超过83 MPa。在此基础上，复合材料的回复应力可达6.0MPa以上，且随温度和PAn含量的增加而增大。这种复合材料可以作为各种应用的致动器元件的一个很好的候选人。
A multiresponsive shape memory composite was prepared by incorporating polyaniline (PAn) fibers into polyvinyl alcohol (PVA), where in situ polymerization assisted by surfactant was used to homogeneously disperse PAn fibers in a PVA matrix. The PAn fibers not only increased physical cross-linking points in the system but also served as photothermal conversion reagents, resulting in excellent water-, thermal-, and near-infrared (NIR) light-induced shape memory properties of the composites, where their light-induced shape recovery ratio and speed could be enhanced via the increase of PAn loading percentage and light power density. Moreover, the composites possessed high mechanical properties with tensile strength over 83 MPa. On the basis of these dramatic mechanical properties and shape memory properties, the composites could show high recovery stress over 6.0 MPa, which increased with the increase of temperature and PAn loading percentage. This presented composite could be a great candidate as actuator element for various applications.