标题： PDMS弹性体粘附行为的表面粗糙度调制研究 显示英文标题

标题： Study of surface roughness modulation on the adhesion behavior of PDMS elastomer

摘要： 界面处的粘附控制在各种应用中至关重要，包括微机电和纳米设备的设计，如微流体装置、摩擦纳米发电机、生物芯片和电子传感器。 影响粘附的几个因素包括样品制备、表面能、机械性能如弹性模量以及表面纹理或粗糙度。 本研究特别研究了表面粗糙度对聚二甲基硅氧烷（PDMS）弹性体粘附行为的影响，重点研究了具有相同粗糙度的互补界面。 为了创建表面粗糙度，在铸造过程中使用了粒度范围从N = 120到N = 2000的砂纸。 然后使用触针式轮廓仪对PDMS弹性体的表面粗糙度进行了表征。 通过楔形测试实验评估了界面粘附性，这使得能够分析表面粗糙度、粘附功和平衡裂纹长度之间的关系。 此外，该研究还探讨了实际接触面积与粘附功之间的相关性。 显示英文摘要

摘要： Adhesion control at the interface of two surfaces is crucial in various applications, including the design of micro- and nanodevices such as microfluidic devices, triboelectric nanogenerators, biochips, and electronic sensors. Several factors influence adhesion, including sample preparation, surface energy, mechanical properties such as modulus of elasticity, and surface texture or roughness. This study specifically investigates the effect of surface roughness on the adhesion behavior of the elastomer polydimethylsiloxane (PDMS), focusing on a complementary interface with identical roughness. To create surface roughness, sandpapers with grit sizes ranging from N = 120 to N = 2000 were used during the molding process. The surface roughness of the PDMS elastomer was then characterized using a stylus profilometer. Interfacial adhesion was evaluated through wedge test experiments, which enabled the analysis of the relationship between surface roughness, work of adhesion, and equilibrium crack length. Furthermore, the study also explores the correlation between the real area of contact and the work of adhesion.