Mr. Chi Zhang Profile

Chi Zhang

at Xi'an Jiaotong Univ

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Proceedings Article | 8 March 2014 Paper

Comparison of plasma treatment and sandblast preprocessing for IPMC actuator

Chi Zhang, Hualing Chen, Yanjie Wang, Yongquan Wang, Shuhai Jia

Proceedings Volume 9056, 905635 (2014) https://doi.org/10.1117/12.2044911

KEYWORDS: Resistance, Electrodes, Plasma etching, Plasma treatment, Actuators, Metals, Polymers, Smart materials, Composites, Manufacturing

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As a new kind of ionic-driven smart materials, ionic polymer metal composite (IPMC ) is normally fabricated by depositing noble metal (gold, platinum, palladium etc.) on both sides of base membrane (Nafion, Flemion etc.) and shows large bending deflection under low voltage. In the process of fabricating IPMC, surface roughening of base membrane has a significant effect on the performance of IPMC. At present, there are many ways to roughen the base membrane, including physical and chemical ways. In this paper, we analyze the effects of different surface treatment time by plasma etching on surface resistance and mechanical properties of IPMCs fabricated by the treated base membranes. Experimental results show that the base membrane treated by plasma etching displays uniform surface roughness, consequently reducing IPMC’s surface resistance effectively and forming more uniform and homogeneous external and penetrative electrodes. However, due to the use of reactive gas, the plasma treatment leads to complex chemical reaction on Nafion surface, changing element composition and material properties and resulting in the performance degradation of IPMC. And sandblast way should be adopted and improved without any changes on element and material structure.

Proceedings Article | 8 March 2014 Paper

Design and fabrication of an IPMC-embedded tube for minimally invasive surgery applications

Jiayu Liu, Yanjie Wang, Dongxu Zhao, Chi Zhang, Hualing Chen, Dichen Li

Proceedings Volume 9056, 90563K (2014) https://doi.org/10.1117/12.2050562

KEYWORDS: Actuators, Silicon, Electrodes, Palladium, Surgery, 3D printing, Polymers, Robotics, Data acquisition, Control systems

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Minimally Invasive Surgery (MIS) is receiving much attention for a number of reasons, including less trauma, faster recovery and enhanced precision. The traditional robotic actuators do not have the capabilities required to fulfill the demand for new applications in MIS. Ionic Polymer-Metal Composite (IPMC), one of the most promising smart materials, has extensive desirable characteristics such as low actuation voltage, large bending deformation and high functionality. Compared with traditional actuators, IPMCs can mimic biological muscle and are highly promising for actuation in robotic surgery. In this paper, a new approach which involves molding and integrating IPMC actuators into a soft silicone tube to create an active actuating tube capable of multi-degree-of-freedom motion is presented. First, according to the structure and performance requirements of the actuating tube, the biaxial bending IPMC actuators fabricated by using solution casting method have been implemented. The silicone was cured at a suitable temperature to form a flexible tube using molds fabricated by 3D Printing technology. Then an assembly based fabrication process was used to mold or integrate biaxial bending IPMC actuators into the soft silicone material to create an active control tube. The IPMC-embedded tube can generate multi-degree-of-freedom motions by controlling each IPMC actuator. Furthermore, the basic performance of the actuators was analyzed, including the displacement and the response speed. Experimental results indicate that IPMC-embedded tubes are promising for applications in MIS.

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