Graphene-coated polymer foams as tuneable impact sensors†,Nanoscale

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Graphene-coated polymer foams as tuneable impact sensors†
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-28 00:00:00 , DOI: 10.1039/c7nr09247d
Conor S. Boland _{1,

2,

3,

4,

5} , Umar Khan _{5,

6,

7} , Mathew Binions _{1,

2,

3,

4,

5} , Sebastian Barwich _{1,

2,

3,

4,

5} , John B. Boland _{1,

2,

3,

4,

5} , Denis Weaire _{1,

2,

3,

4,

5} , Jonathan N. Coleman _{1,

2,

3,

4,

5}

Affiliation

The use of graphene-based nanocomposites as electromechanical sensors has been broadly explored in recent times with a number of papers describing porous, foam-like composites. However, there are no reported foam-based materials that are capable of large dynamic compressive load measurements and very few studies on composite impact sensing. In this work, we describe a simple method of infusing commercially-available foams with pristine graphene to form conductive composites, which we refer to as G-foam. Displaying a strain-dependent electrical response, G-foam was found to be a reasonably effective pressure sensing material. More interestingly, G-foam is a sensitive impact-sensing material. Through the addition of various amounts of polymer filler, the mechanical properties of the composites can be tuned leading to the controllable variation of the impact sensing range. We have developed a simple model which quantitatively explains all our impact sensing data.

中文翻译：

石墨烯涂层的聚合物泡沫作为可调节的冲击传感器†

近年来，基于石墨烯的纳米复合材料作为机电传感器的应用已得到广泛探索，许多论文描述了多孔的泡沫状复合材料。但是，没有报道的泡沫材料能够进行大的动态压缩载荷测量，并且很少有关于复合冲击感测的研究。在这项工作中，我们描述了一种将市售泡沫与原始石墨烯注入以形成导电复合材料（称为G泡沫）的简单方法。显示出应变相关的电响应，发现G泡沫是一种相当有效的压力传感材料。更有趣的是，G型泡沫是一种敏感的撞击感测材料。通过添加各种数量的聚合物填料，可以调节复合材料的机械性能，从而导致冲击感测范围的可控变化。我们已经开发了一个简单的模型，可以量化地解释我们所有的冲击感应数据。

更新日期：2018-02-28

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