Interfaceless Strain and Pressure‐Sensitive Stretchable Capacitor Based on Self‐Bonding and Surface Morphology Control of a Reversibly Crosslinkable Silicone Elastomer,Advanced Materials Technologies

当前位置： X-MOL 学术 › Adv. Mater. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Interfaceless Strain and Pressure‐Sensitive Stretchable Capacitor Based on Self‐Bonding and Surface Morphology Control of a Reversibly Crosslinkable Silicone Elastomer
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-01-13 , DOI: 10.1002/admt.201900757
Su Bin Choi ₁ , Chul Jong Han ₂ , Cheul‐Ro Lee ₁ , Jong‐Woong Kim ₁

Affiliation

A typical capacitive mechanical sensor implemented using a layer of soft dielectric polymer sandwiched between two flexible electrodes, where the capacitance is formed, suffers from unintended buckling instability upon repeated stretch‐and‐release owing to different mechanical characteristics of constituent materials and unstable interfaces. Here, a stretchable, healable, and transparent strain/pressure‐sensitive capacitor is successfully fabricated by hybridizing Ag nanowires (AgNWs) with a polydimethylsiloxane containing maleimide‐derived Diels–Alder (DA) adducts as reversible crosslinkers. AgNWs formed on the surface of the cured polymer sheet are impregnated under the surface of the film by utilizing the vaporized solvent‐assisted retro‐DA reaction. Two identical films with fully impregnated AgNWs under the polymer surface are subjected to lamination with the insulated areas facing each other to implement a sandwich‐structure with a centering dielectric layer. Owing to the retro‐DA and reversible crosslinking during heating, two films in contact are fully integrated as if the architecture is originally made of a single film. The sensitivity to pressure under the stretching condition increases by about 320% compared to that without stretching.

中文翻译：

基于自粘合和可逆交联有机硅弹性体的表面形态控制的无界面应变和压力敏感可拉伸电容器

典型的电容式机械传感器使用的是柔软的介电聚合物层，该层夹在两个形成有电容的柔性电极之间，由于构成材料的不同机械特性和不稳定的界面，在反复拉伸和释放时会出现意外的屈曲不稳定性。在这里，通过将Ag纳米线（AgNWs）与包含马来酰亚胺衍生的Diels-Alder（DA）加合物作为可逆交联剂的聚二甲基硅氧烷杂交，成功地制造了可拉伸，可修复且透明的应变/压敏电容器。利用汽化溶剂辅助的逆向DA反应，将在固化的聚合物片材表面上形成的AgNWs浸渍在薄膜表面下。将两块完全浸有AgNW的相同薄膜在聚合物表面下进行层压，使绝缘区域彼此面对，以实现具有居中介电层的三明治结构。由于retro-DA和加热过程中的可逆交联，两个接触的膜完全融合在一起，就好像该体系结构最初是由单个膜制成的。与没有拉伸的情况相比，在拉伸条件下对压力的敏感性提高了约320％。

更新日期：2020-02-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11