Development of damper used new energy dissipation principal colloidal damper

本研究系利用微孔洞内之表面延伸原理，发展一种新型阻尼器。由硅胶制成的孔被疏水性材料涂覆。然后，如果水流入和流出孔隙，两个表面延伸力是不同的。这种差异导致能量耗散，因为由流入和流出的力的轨迹形成的面积成为耗散能。本研究的目的是选择合适的涂层材料、孔径、水和液体的压力，通过实验的方式设计合适的阻尼器系统和应用模型，并利用分子动力学分析水在孔隙中的运动。实验中，采用气缸/活塞系统和疏水硅胶与水组成的胶体液体制成阻尼器。首先进行了胶体阻尼器的静态试验，获得了胶体阻尼器的基本特性，为阻尼器的设计提供了材料。其次，通过使用激振机和阻尼器的频率响应，即，由于频率变化和缸中的预压力的滞后特性进行了动态测试。最后得出以下结论：（1）SMB 70 -20-MT-C8是最好的涂层材料;（2）孔径约为7- 10 nm;（3）水的预压力为6-8 Mpa，最大压力为60 Mpa;（4）在寒冷的环境中，水通常是好的，防冻剂可用;（5）单缸预压力简单，效率高，（6）当将该阻尼器应用于汽车悬架时，由于胶体阻尼器具有刚度和阻尼特性，因此滞后特性不同于油阻尼器。（7）在使用分子动力学的分析中，对于单个孔和水簇测量孔中的水的运动和接触角。

This research is development of a new damper which is used a principle of surface extension in a very small pore. The pore made of silica gel is coated by hydrophobic material. Then if water flows in and out to the pore, both surface extension forces are different. This difference induces energy dissipation, because the area made by tracks of the forces of flow in and out becomes dissipation energy. The object of this research is to select adequate coating material, pore diameter, pressure of water and liquid to design a proper damper system and application model by using experimental manner and to analyze movement of water in a pore by using molecular dynamics. In the experiment a damper is made by cylinder / piston system and colloidal liquid composed by hydrophobic silica gel and water. First, static test is performed to obtain basic characteristics of the colloidal damper and material for design of the damper is obtained. Second, dynamic test is performed by using an exciting machine and frequency response of the damper, that is, hysteresis characteristics due to frequency change and pre-pressure in the cylinder are investigated. Then the followings are concluded; (1) SMB70-20-MT-C8 is best as a coating material, (2) The pore diameter is about 7-10nm, (3) Pre-pressure of water is 6-8 Mpa and max-pressure is 60Mpa, (4) Water is usually good and antifreeze is available in cold circumference, (5) Single cylinder with pre-pressure is simple and high efficiency, (6) When the damper is applied to a car suspension, characteristics of hysteresis is different from a oil damper because the colloidal damper has stiffness and damping property and (7) In the analysis using molecular dynamics, movement of water and contact angle in the pore are measured for a single pore and water cluster.