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首页> 外文期刊>ACS applied materials & interfaces >Nonconductive Noncharging Composites: Tunable and Stretchable Materials for Adaptive Prevention of Charging by Contact Electrification
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Nonconductive Noncharging Composites: Tunable and Stretchable Materials for Adaptive Prevention of Charging by Contact Electrification

机译：非导电非充电复合材料：可调谐和可伸展材料，用于通过接触电气进行自适应预防充电

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摘要

Static charge generated by contact electrification can cause a wide range of undesirable consequences in our lives and in industry (e.g., adhesion of particles on surfaces, damage to electronics, and explosions). It has, however, been challenging to develop methods to prevent charging due to the vast types of materials that charge easily by contact electrification and the frequent changes in process and environmental conditions. The most common method is to use conductive materials for dissipating charge away; however, it is ineffective for many circumstances. Here, we propose a general and effective materials framework that involves a two-level consideration for preparing noncharging materials: (1) the variation of the proportion of a two material composite and (2) the extent of stretching the composite material. This materials strategy is achieved by infusing particles within a stretchable bulk material. Importantly, the preparation of the noncharging surface for (1) is based on a novel fundamental mechanism that involves combining an appropriate amount of a material (e.g., the particles) that tends to charge positively with another material (e.g., the bulk material) that tends to charge negatively. This mechanism does not rely on conductivity; both the contacting materials naturally prevent the generation of static charge even when only nonconductive materials are involved. When the composite material is stretchable, the change in proportion of the surface coverage of the particles allows the charging response to be changed. Therefore, the variation in composition and stretching provide a wide two-dimensional parameter space for achieving noncharging response for the vast range of contacting materials that are used in industry and our lives. In addition, stretchability allows the composite material to flexibly adapt to changes in process and environmental conditions. This stretchable composite material was also demonstrated to be capable of preventing the adhesion of particles and separating particles of different materials.
机译：接触电气化产生的静电电荷可能导致我们的生活和工业中的广泛不良后果（例如，表面上颗粒的粘附，电子产品损坏和爆炸）。然而，它已经具有挑战性地开发防止由于大量材料由于接触电气而容易充电的大型材料和过程和环境条件的频繁变化而导致充电的方法。最常见的方法是使用导电材料来消散充电;但是，对于许多情况来说，它无效。在这里，我们提出了一种综合有效的材料框架，其涉及用于制备非充电材料的两级考虑因素：（1）两种材料复合材料比例的变化和（2）拉伸复合材料的程度。该材料策略是通过在可拉伸的散装材料内输注颗粒来实现的。重要的是，（1）的非充电表面的制备基于一种新的基本机制，所述基本机制涉及组合适量的材料（例如，颗粒），其倾向于与另一种材料（例如，散装材料）带来充电倾向于充电。这种机制不依赖于电导率;即使只有涉及非导电材料，也可以防止静电的产生。当复合材料可伸展时，颗粒的表面覆盖的比例的变化允许改变充电响​​应。因此，组合物和拉伸的变化提供了宽的二维参数空间，用于实现在工业和生活中使用的广泛接触材料的非收点响应。此外，拉伸性允许复合材料灵活地适应过程和环境条件的变化。还证明了这种可拉伸的复合材料能够防止颗粒的粘附和分离不同材料的颗粒。

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