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首页> 外文期刊>RSC Advances >Sulfonic SiO2 nanocolloid doped perfluorosulfonic acid films with enhanced water uptake and inner channel for IPMC actuators
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Sulfonic SiO2 nanocolloid doped perfluorosulfonic acid films with enhanced water uptake and inner channel for IPMC actuators

机译：磺酸SiO2纳米胶体掺杂全氟磺酸薄膜，具有增强的水吸收和IPMC执行器的内通道

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This study provides a facile and effective strategy to fabricate sulfonic SiO2 nanocolloid (HSO3-SiO2) doped perfluorosulfonic acid (PFSA) films with enhanced water uptake and inner channel for high-performance and cost-effective ionic exchange polymer metal composite (IPMC) actuators. A commercial precursor of mercaptopropyl trimethoxysilane was hydrolyzed to form thiol functionalized SiO2 nanocolloids (SH-SiO2, similar to 25 nm in diameter), which were further oxidized into sulfonic SiO2 nanocolloids (HSO3-SiO2, similar to 14 nm in diameter). Both SiO2 nanocolloids were used as additives to dope PFSA film for fabricating IPMC-used matrix films. Due to difference of compatibility, the SH-SiO2 nanocolloids take phase separation in the cocrystallization course, and aggregate into huge, regular spherical particles with a mean diameter of similar to 690 mu m; while the HSO3-SiO2 nanocolloids are completely compatible with PFSA, forming a very homogeneous hybrid matrix film. Related physiochemical investigations by analytical tools revealed that, the resultant HSO3-SiO2 hybrid film shows better IPMC-related properties compared to the SH-SiO2 hybrid film: 1.59 folds in water uptake, and 2.37 folds in ion exchanging capacity, thus contains an increased number of cations and possesses larger and better interconnected inner channels for IPMC bending. Consequently, the HSO3-SiO2 hybrid IPMC actuator exhibits remarkably higher levels of actuation behaviours such as higher force output, higher displacement output, and longer stable working time, which could be used as a valuable artificial muscle for flexible actuators or displacement/vibration sensors at low cost.
机译：本研究提供了一种容易和有效的策略来制造磺酸SiO2纳米蛋白（HSO3-SiO 2）掺杂的全氟磺酸（PFSA）膜，具有增强的水吸收和内部通道，用于高性能和经济高效的离子交换聚合物金属复合物（IPMC）致动器。将巯基丙基三甲氧基硅烷的商业前体水解以形成硫醇官能化的SiO2纳米蛋白（类似于25nm的Sh-SiO 2），其进一步氧化成磺酸SiO2纳米蛋白（HSO3-SiO 2，直径为14nm）。 SiO2纳米胶体均用作添加剂的添加剂，以掺杂PFSA膜，用于制造IPMC使用的基质膜。由于相容性的差异，SH-SiO2纳米胶体在Cocrystalization过程中进行相分离，并聚集成巨大，规则的球形颗粒，平均直径与690 mu m相似;虽然HSO3-SiO2纳米胶体与PFSA完全相同，但形成非常均匀的杂交基膜。通过分析工具的相关生理化学研究表明，与SH-SiO2混合膜相比，所得HSO3-SiO 2杂化膜的杂交膜更好地显示出更好的IPMC相关性质：1.59倍的水吸收，离子交换能力为2.37倍，因此含有增加的数量阳离子并具有更大且更好地互连的内部通道，用于IPMC弯曲。因此，HSO3-SIO2混合IPMC致动器表现出较高水平的致动行为，例如较高的力输出，更高的位移输出，更长的工作时间，这可以用作柔性致动器或位移/振动传感器的有价值的人造肌肉低成本。

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    《RSC Advances》 |2019年第72期|共9页
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