Preparation and characterization of water-soluble carbon nanotube reinforced Nafion membranes and so-based ionic polymer metal composite actuators
Preparation and characterization of water-soluble carbon nanotube reinforced Nafion membranes and so-based ionic polymer metal composite actuators
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DOI：
10.1088/0964-1726/25/9/095006
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发表时间：
2016-09-01
影响因子：
4.1
通讯作者：
Li, Dichen
中科院分区：
文献类型：
--
作者：
Ru, Jie;Wang, Yanjie;Li, Dichen
针对传统离子聚合物金属复合材料（IPMC）在低驱动电压下弯曲变形小、承载能力差等缺点，将水溶性磺化多壁碳纳米管（sMWCNT）掺杂到Nafion基体中，研制了一种新型IPMC驱动器。首先通过重氮化偶联反应合成了sMWCNT，然后采用浇铸法将其掺杂到Nafion基体中。随后，sMWCNT增强的Nafion膜和相应的IPMCs的电化学和机电性能进行了研究。最后，系统评价和分析了sMWCNT对IPMC性能的影响。结果表明，sMWCNT在Nafion基体中分散均匀，无明显的缠结结构和团聚现象。上级驱动性能的主要因素，如吸水率，质子传导率和弹性模量，显着增加。与纯NafionIPMC和MWCNT/NafionIPMC相比，sMWCNT/NafionIPMC具有更优异的上级电化学性能和机电性能，这归因于sMWCNT的大量插入位点、高的表面电导率和优异的机械强度以及均匀的分散性。在此，痕量的sMWCNT可以显著改善IPMC的性能，以用于实际应用。
In this paper, we developed a new kind of ionic polymer metal composite (IPMC) actuator by doping water-soluble sulfonated multi-walled carbon nanotube (sMWCNT) into Nafion matrix to overcome some major drawbacks of traditional IPMCs, such as relatively low bending deformation and carring capacity at low driving voltages. Firstly, sMWCNT was synthesized via diazotization coupling reaction, and then doped into Nafion matrix by casting method. Subsequently, the electrochemical and electromechanical properties of sMWCNT-reinforced Nafion membranes and the corresponding IPMCs were investigated. Finally, the effects of sMWCNT on the performances of IPMCs were evaluated and analyzed systematacially. The results showed that sMWCNT was homogeneously dispersed in Nafion matrix without any entangled structure or obvious agglomeration. The main factors for superior actuation performances, like water-uptake ratio, proton conductivity and elastic modulus, increased significantly. Compared to the pure Nafion IPMC and MWCNT/Nafion IPMC, much superior electrochemical and electromechanical performances were achieved in the sMWCNT/Nafion IPMC, which were attributed to the numerous insertion sites, high surface conductivity and excellent mechanical strength as well as the homogeneous dispersity of the incorporated sMWCNT. Herein, a trace amount of sMWCNT can improve the performances of IPMCs significantly for realistic applications.