An instant responsive polymer driven by anisotropy of crystal phases†,Materials Horizons

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An instant responsive polymer driven by anisotropy of crystal phases†
Materials Horizons ( IF 12.2 ) Pub Date : 2017-11-22 00:00:00 , DOI: 10.1039/c7mh00854f
Heng Deng _{1,

2,

3,

4} , Yuan Dong _{1,

2,

3,

4} , Cheng Zhang _{1,

2,

3,

4} , Yunchao Xie _{1,

2,

3,

4} , Chi Zhang _{1,

2,

3,

4} , Jian Lin _{1,

2,

3,

4}

Affiliation

We report a new type of responsive polymer film which is composed of pure poly(vinylidene fluoride) (PVDF) and is prepared using a simple solution-casting method. This responsive PVDF film possesses an anisotropic spatial distribution of the α phase and β phase, resulting in a fast response rate, high sensitivity, and robust responsiveness to organic vapors. Experimental and computational studies illustrate that α-phase PVDF exhibits a much stronger swelling ability in acetone vapor than β-phase PVDF. Anisotropic swelling induces internal stresses, offering a driving force for macroscopic shape transformation. This newly unveiled mechanism endows the material with new functionalities for fabricating devices such as a magnetically controlled soft tumbler and a chemi-mechanical sensor. Furthermore, crystal phase anisotropy in the PVDF film can be easily programmed into origami patterns by direct laser writing (DLW) for driving reversible three-dimensional (3D) shape transformation of the film.

中文翻译：

晶相各向异性驱动的即时响应聚合物†

我们报告了一种新型的反应型聚合物薄膜，该薄膜由纯聚偏二氟乙烯（PVDF）组成，并使用简单的溶液浇铸方法制备。该响应性PVDF膜具有α相和β相的各向异性空间分布，从而导致响应速度快，灵敏度高以及对有机蒸气的响应性强。实验和计算研究表明，α相PVDF在丙酮蒸汽中的溶胀能力比β相PVDF大。各向异性膨胀会引起内部应力，从而为宏观形状转换提供驱动力。这种新近揭示的机制赋予了材料以新的功能，可用于制造诸如磁控软杯和化学机械传感器之类的设备。此外，

更新日期：2017-11-22

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