contact angle

简明释义

啮合角

英英释义

例句

1.The measurement of the contact angle 接触角 helps determine the wettability of a surface.

对接触角 接触角的测量有助于确定表面的润湿性。

2.A lower contact angle 接触角 indicates a more hydrophilic surface.

较低的接触角 接触角表明表面更亲水。

3.The contact angle 接触角 can be affected by surface roughness and chemical composition.

表面粗糙度和化学成分会影响接触角 接触角。

4.In coating applications, optimizing the contact angle 接触角 is crucial for adhesion.

在涂层应用中，优化接触角 接触角对于粘附性至关重要。

5.Scientists use a goniometer to measure the contact angle 接触角 of liquids on various materials.

科学家使用测角仪来测量液体在各种材料上的接触角 接触角。

作文

The study of liquid behavior on solid surfaces is a critical aspect of material science and engineering. One of the key parameters that describe this interaction is the contact angle. The contact angle is defined as the angle formed between a liquid droplet and the solid surface it rests upon. This angle provides valuable insights into the wettability of the surface, which can influence various applications such as coatings, adhesives, and even biological interactions. When a droplet of liquid is placed on a solid surface, it does not spread uniformly. Instead, it forms a shape that is determined by the balance of cohesive forces within the liquid and adhesive forces between the liquid and the solid. If the adhesive forces are stronger than the cohesive forces, the droplet will spread out, resulting in a low contact angle. Conversely, if the cohesive forces dominate, the droplet will remain more spherical, leading to a high contact angle. Understanding the contact angle is essential for designing surfaces with specific properties. For example, in the case of self-cleaning surfaces, a high contact angle is desired to ensure that water droplets bead up and roll off, carrying dirt and contaminants with them. This phenomenon is often inspired by nature, such as the lotus leaf effect, where the micro- and nano-structured surface leads to superior water repellency. On the other hand, in applications like painting or coating, a low contact angle is preferred to enhance the spreading of the liquid, ensuring an even layer without defects. In these scenarios, surface treatments or modifications may be employed to alter the contact angle and improve adhesion. The measurement of the contact angle can be accomplished using several techniques, including the sessile drop method and the Wilhelmy plate method. These methods provide quantitative data that can help researchers and engineers understand how different materials interact with liquids. In conclusion, the contact angle is a fundamental parameter that plays a significant role in many scientific and industrial processes. By manipulating the contact angle, we can tailor the properties of surfaces to meet specific needs, ranging from enhanced cleanliness to better adhesion. As research continues to advance in this field, the implications for technology and everyday life are vast, making the study of the contact angle both fascinating and essential.

液体在固体表面上的行为研究是材料科学和工程的重要方面。描述这种相互作用的关键参数之一是接触角。接触角被定义为液滴与其所处固体表面之间形成的角度。这个角度提供了对表面润湿性的重要见解，这可能影响涂层、粘合剂甚至生物相互作用等各种应用。当一滴液体被放置在固体表面上时，它不会均匀地扩散。相反，它形成的形状由液体内部的内聚力和液体与固体之间的粘附力之间的平衡决定。如果粘附力强于内聚力，液滴将扩散，从而导致低接触角。相反，如果内聚力占主导地位，液滴将保持更球形，导致高接触角。理解接触角对于设计具有特定属性的表面至关重要。例如，在自清洁表面的情况下，希望获得高接触角，以确保水滴成珠并滚落，带走污垢和污染物。这种现象通常受到自然界的启发，例如莲花叶效应，其中微米和纳米结构的表面导致优异的防水性。另一方面，在涂漆或涂层等应用中，低接触角是首选，以增强液体的扩散，确保均匀的涂层而没有缺陷。在这些情况下，可以采用表面处理或改性来改变接触角并改善粘附性。接触角的测量可以通过几种技术实现，包括静态液滴法和Wilhelmy板法。这些方法提供的定量数据可以帮助研究人员和工程师理解不同材料与液体之间的相互作用。总之，接触角是一个基本参数，在许多科学和工业过程中发挥着重要作用。通过操控接触角，我们可以定制表面的特性以满足特定需求，从增强清洁能力到更好的粘附性。随着这一领域研究的不断推进，对技术和日常生活的影响是巨大的，使得对接触角的研究既迷人又必不可少。