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Ionic Polymer-Metal Composites (IPMCs) with Various Ion Exchange Membranes and Their Potential Use in IPMC Applications.

机译：具有各种离子交换膜的离子聚合物金属复合材料（IPMC）及其在IPMC应用中的潜在用途。

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摘要

Ionic polymer metal composites (IPMCs) have been widely studied and drawn great attention for the last several years in robotics and medical fields due to their great potential as actuators, artificial muscles, and more. Each part of an IPMC is important, but the role of ionic exchange membrane should be emphasized because, after all, it is where ions migrate when voltage is applied to produce motion. So far, most researches have been done on IPMCs made with commercially available ionic exchange membranes such as Nafion or Flemion. In this thesis, the research is mainly focused on fabricating IPMCs with several other ionic exchange membranes that are commercially available and characterization of optical, physical, and electromechanical properties of those IPMCs. Five different ion exchange membranes of DuPont (N115), Golden Energy Fuel Cells Inc (GEFC-700)., fuMA Tech (F-14100), Membranes International Inc. (CMI-7000S) and University of Nevada Las Vegas (19-PSU-S1) are the chosen membranes. N115, GEFC-700, and F-14100 have the same structure. CMI-7000S is a reinforced membrane by mixing fibers with the ion exchange membrane. 19-PSU-S1 is a membrane that was made at UNLV for fuel cell application. The physical properties of the ionic exchange membranes were studied by examining water uptake. The thermal analysis also was carried out with Differential Scanning Calorimetry (DSC). Water uptake and ion exchange capacities were measured to confirm the physical properties of IPMCs. The structure of the IPMCs was observed under Scanning Electron Microscopy (SEM). The structures of fabricated IPMCs were observed by SEM and DSC. Capacitance was also measured by drawing impedance curves. Young's modulus (E) was measured to determine the stiffness of each IPMC. Lastly, bending actuation test was carried out to observe the actual performance of each IPMC in water.;The water uptake of all IPMCs is less than 40%. 19-PSU-S1 absorbed the most water (35.2 %) and CMI-7000S absorbed the least amount of water (17.1 %). For ion exchange capacity (IEC), 19-PSU-S1 had the largest value of 1.18 meq/g while F-14100 has the smallest as 0.7 meq/g. The glass transition temperatures of all IPMCs were around 100 °C while it was 87 °C for 19-PSU-S1. The young's modulus was the smallest for IPMC with GEFC-700, 169.72 MPa and the largest for one with 19-PSU-S1, 1749.88 MPa. The largest capacitance was observed at the lowest frequency, just above 0 Hz. IPMCs with GEFC-700 and CMI-7000S had the lowest capacitance, 0.06 mF/cm2 and N115 had the largest capacitance, 0.5 mF/cm2. Lastly, the deflection at the tip measured was the largest for the IPMC with N115 and F-14100 while it was the smallest for the IPMC made with GEFC-700. However, deflection at the tip is affected by the thickness. Therefore, bending stain was calculated. GEFC-700S and N117 had very close bending strain value as the largest while CMI-7000S had the smallest. The blocking force is measured and it increased as the stiffness of the IPMCs increase. GEFC-700S had the largest power at 4 V while 19-PSU-S1 had the least power. For all IPMCs, the power was the largest at 1 Hz.
机译：离子聚合物金属复合材料（IPMC）由于在执行器，人造肌肉等方面的巨大潜力，在机器人技术和医学领域已受到近几年的广泛研究和广泛关注。 IPMC的每个部分都很重要，但是应强调离子交换膜的作用，因为毕竟在施加电压以产生运动时，离子交换膜就是离子迁移的地方。迄今为止，大多数研究是对使用市售离子交换膜（如Nafion或Flemion）制成的IPMC进行的。在这篇论文中，研究主要集中在用市场上可买到的几种其他离子交换膜制造IPMC以及表征这些IPMC的光学，物理和机电性能。杜邦（N115），Golden Energy燃料电池公司（GEFC-700），富马科技（F-14100），膜国际公司（CMI-7000S）和内华达大学拉斯维加斯（19-PSU）的五种不同的离子交换膜-S1）是所选的膜。 N115，GEFC-700和F-14100具有相同的结构。 CMI-7000S是通过将纤维与离子交换膜混合而制成的增强膜。 19-PSU-S1是在UNLV上制造的用于燃料电池的膜。通过检查水吸收来研究离子交换膜的物理性质。还使用差示扫描量热法（DSC）进行了热分析。测量吸水率和离子交换容量以确认IPMC的物理特性。在扫描电子显微镜（SEM）下观察到IPMC的结构。通过SEM和DSC观察制备的IPMC的结构。还通过绘制阻抗曲线来测量电容。测量杨氏模量（E）以确定每个IPMC的刚度。最后，进行弯曲致动试验，观察各IPMC在水中的实际性能。所有IPMC的吸水率均低于40％。 19-PSU-S1吸收的水最多（35.2％），而CMI-7000S吸收的水最少（17.1％）。对于离子交换容量（IEC），19-PSU-S1的最大值为1.18 meq / g，而F-14100的最小值为0.7 meq / g。所有IPMC的玻璃化转变温度约为100°C，而19-PSU-S1的玻璃化转变温度为87°C。杨氏模量对于使用GEFC-700的IPMC最小，为169.72 MPa，对于使用19-PSU-S1的IPMC，最大，为1749.88 MPa。在最低频率（刚好高于0 Hz）观察到最大电容。具有GEFC-700和CMI-7000S的IPMC的电容最低，为0.06 mF / cm2，而N115的电容最大，为0.5 mF / cm2。最后，对于N115和F-14100的IPMC，测得的尖端挠度最大，而对于GEFC-700制成的IPMC，其挠度最小。但是，尖端的挠度会受到厚度的影响。因此，计算出弯曲污点。 GEFC-700S和N117具有非常接近的最大弯曲应变值，而CMI-7000S具有最小的弯曲应变值。测量阻挡力，并随着IPMC刚度的增加而增加。 GEFC-700S在4 V时具有最大功率，而19-PSU-S1则具有最小功率。对于所有IPMC，功率为1 Hz时最大。

著录项

  • 作者

    Park, Jiyeon.;

  • 作者单位

    University of Nevada, Reno.;

  • 授予单位 University of Nevada, Reno.;
  • 学科 Engineering Mechanical.;Engineering Materials Science.
  • 学位 M.S.
  • 年度 2012
  • 页码 80 p.
  • 总页数 80
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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