Structured Composite Materials with Variable Adhesion Properties

建议1435745具有可变粘附性能的结构化复合材料对于在某些情况下能够牢固地粘附到表面上而在其他情况下表现出弱粘附力的材料有许多应用。 具有可变粘附力的材料需要用于诸如集成电路制造、太阳能电池制造、医用胶带和攀爬机器人等应用。虽然界面处的粘附力可以通过外力（如温度或磁场）改变，但更简单的设计是设计具有可变粘附力的材料，该可变粘附力可以根据施加的力的方向而改变。该奖项支持基础研究，这将使结构化复合材料的设计和制造，提供通过改变施加到粘附界面的负载方向显着改变粘附力的能力。 这些具有可变粘附力的复合材料可用于制造业，医疗保健和消费品，因此这项研究将有利于美国工业和经济。 该奖项还将导致学生在几个学科的培训，包括机械工程，微细加工，聚合物加工和材料科学。在关键工程领域的培训将有助于提高技术劳动力和提高美国的竞争力。所提出的复合材料提供了通过改变加载方向来显著改变界面的有效粘附的能力。虽然这些材料的基本原理已经通过初步实验和建模得到了证明，但还需要进行基础研究，以了解结构化复合材料的加工、结构和粘合性能之间的关系。本研究将使用分析和计算力学模型来研究复合材料的结构和界面的破坏行为之间的关系。 将进行实验，以表征复合材料的组成材料的粘合剂和本构特性作为模型的输入。微加工和聚合物成型技术的组合将用于制造结构化的复合材料，然后将在各种载荷条件下进行广泛的表征。在这项研究中，建模和实验的结合将导致结构复合材料的新的基本理解，并将使可变粘附力的材料的合理设计。

Proposal 1435745Structured Composite Materials with Variable Adhesion PropertiesThere are a number of applications for materials that have the ability to adhere strongly to a surface under certain circumstances, and to exhibit weak adhesion in other circumstances. Materials with variable adhesion are needed for applications such as integrated circuit fabrication, solar cell manufacturing, medical tapes, and climbing robots. While adhesion at an interface can be altered through external forces such as temperature or magnetic field, a much simpler design is to design materials with variable adhesion that can be altered depending on the direction of the applied force. This award supports fundamental research that will enable the design and fabrication of structured composite materials that offer the ability to significantly vary adhesion by changing the direction of loading applied to the adhered interface. These composite materials with variable adhesion have uses in manufacturing, healthcare, and consumer products, thus this research will benefit U.S. industry and the economy. This award will also result in the training of students in several disciplines, including mechanical engineering, microfabrication, polymer processing, and materials science. This training in key engineering areas will help to enhance the technical workforce and improve U.S. competiveness. The proposed composite materials provide the ability to significantly alter the effective adhesion of an interface by changing the loading direction. While the basic principles of these materials have been demonstrated through preliminary experiments and modeling, fundamental research is needed to establish an understanding of the relationship between the processing, structure, and adhesion properties of structured composite materials. This research will use analytical and computational mechanics models to investigate the relationship between the structure of the composite and the failure behavior of the interface. Experiments will be performed to characterize the adhesive and constitutive properties of the constituent materials of the composites as input for the models. A combination of microfabrication and polymer molding techniques will be used to fabricate structured composite materials that will then be extensively characterized under various loading conditions. The combination of modeling and experiments in this research will lead to new fundamental understanding of structured composite materials and will enable the rational design of materials with variable adhesion.