Skin adhesives are used to attach medical devices to the body and are required to adhere to the skin also during challenging conditions such as exposure to moisture and sweat. In order to maintain good skin–adhesive contact in these situations, the adhesives should be able to absorb water and remove fluids from the skin–adhesive interface. Consequently, the water absorption properties and distribution of water in the adhesives influence the overall adhesive properties. Understanding how the material composition impacts the absorption and distribution of water in these adhesives is required for rational formulation of skin adhesives. Here, we probe the dynamic water absorption in different skin adhesives using time-resolved impedance measurements and gravimetric analysis. Skin adhesive formulations consisting of soft, hydrophobic polymers providing stickiness, rigid block copolymers enhancing the structure, and hydrogel particles allowing for water uptake were designed. The hydrogel particle content and polymer matrix rigidity were varied, and the adhesives were systematically investigated to link the material composition and water absorption functionality.

中文翻译：

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聚合物皮肤粘合剂的吸水动力学

皮肤粘合剂用于将医疗设备连接到身体上，并且在暴露于湿气和汗水等具有挑战性的条件下也需要粘附到皮肤上。为了在这些情况下保持良好的皮肤-粘合剂接触，粘合剂应该能够吸收水分并从皮肤-粘合剂界面去除液体。因此，粘合剂中的吸水性能和水的分布影响整体粘合性能。对于皮肤粘合剂的合理配方，需要了解材料成分如何影响这些粘合剂中水的吸收和分布。在这里，我们使用时间分辨阻抗测量和重量分析来探测不同皮肤粘合剂中的动态吸水率。皮肤粘合剂配方组成的软，设计了提供粘性的疏水聚合物、增强结构的刚性嵌段共聚物和允许吸水的水凝胶颗粒。水凝胶颗粒含量和聚合物基质刚度发生变化，并且系统地研究了粘合剂以将材料组成和吸水功能联系起来。