Polydopamine coated shape memory polymer: enabling light triggered shape recovery, light controlled shape reprogramming and surface functionalization.

Polydopamine coated shape memory polymer: enabling light triggered shape recovery, light controlled shape reprogramming and surface functionalization.
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DOI:
10.1039/c6sc00584e
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发表时间:
2016-07-01
期刊:
影响因子:
8.4
通讯作者:
Ji Y
Ji Y
中科院分区:
化学1区
文献类型:
--
作者:
Li Z;Zhang X;Wang S;Yang Y;Qin B;Wang K;Xie T;Wei Y;Ji Y

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简单的浸涂将热响应形状记忆聚合物转化为光响应材料,并允许形状工程和表面功能化。光敏形状记忆聚合物(SMPs)被认为是一种很有前途的候选人,将光转换为机械能。然而,大多数已知的SMP仅是热响应的。为了实现光活性,通常必须从材料合成的一开始就引入光响应性生色团或填料。在这里,我们介绍了一种新的合成后的方法,赋予正常的SMPs与光活性的性质,使用贻贝启发的表面化学。在不改变原有性质的情况下,所得聚多巴胺(PDA)涂层的SMPs显示出有效的光活性性能。涂层可以容易地图案化和擦除,这允许平面SMP片材的柔性光触发3-D形状变形。此外,由于高化学活性,PDA涂层还提供了一个平台,通过二次表面改性来优化光响应SMPs的表面性质。
Simple dip-coating transforms thermally responsive shape memory polymers into photo-responsive materials and allows for shape engineering and surface functionalization. Photo-active shape memory polymers (SMPs) are considered as a promising candidate for converting light into mechanical energy. However, most known SMPs are only thermo-responsive. To achieve photo-activity, photo-responsive choromophores or fillers usually have to be incorporated from the very beginning of the material synthesis. Here, we introduce a novel post-synthesis approach to endow normal SMPs with photo-active properties using mussel-inspired surface chemistry. Without changing the original properties, the resultant polydopamine (PDA) coated SMPs show an efficient photo-active performance. The coating can be easily patterned and erased, which allows flexible light-triggered 3-D shape deformation of a planar SMP sheet. Moreover, owing to the high chemical activity, the PDA coating also provides a platform to optimize the surface properties of the photo-responsive SMPs through secondary surface modification.
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