High performance polymer actuators based on multi-walled carbon nanotubes that surpass the performance of those containing single-walled carbon nanotubes: Effects of ionic liquid and composition

详细信息	查看全文 | 推荐本文 |

• 作者：Naohiro Terasawa^a ; ^{terasawa-naohiro@aist.go.jp}  ; [Author Vitae] ; Norihiro Ono^a ; ^b  ; [Author Vitae] ; Ken Mukai^a  ; [Author Vitae] ; Tomoyuki Koga^b  ; [Author Vitae] ; Nobuyuki Higashi^b  ; [Author Vitae] ; Kinji Asaka^a  ; [Author Vitae]
• 关键词：Electroactive polymer actuator ; Activated multi-walled carbon nanotube ; Ionic liquid ; Composition ; High performance
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：1 March, 2012
• 卷：163
• 期：1
• 页码：20-28
• 文件大小：1548 K

摘要

The effects of ionic liquid (IL) and composition (ratio of carbon nanotube (CNT):polymer:IL) on the electrochemical and electromechanical properties of actuators containing activated and non-activated multi-walled carbon nanotube (MWCNT)-IL gel electrodes were investigated. The electrochemical and electromechanical properties of actuators containing the activated and non-activated MWCNT-IL gel electrodes were compared to those of a single-walled carbon nanotube (SWCNT)-based actuator. The double-layer capacitance of the activated MWCNT (MWCNT-COOH) electrode and the strain and maximum generated stress for the MWCNT-COOH or MWCNT actuator are dependent on both the IL and composition. For the MWCNT-COOH actuator containing 1-ethyl-3-methylimidazolium tetrafluoroborate (EMI[BF₄]) (MWCNT-COOH:poly(vinylidene fluoride-co-hexafluoropropylene):EMI[BF₄] = 30:30:35), the strain was 0.78-0.80%for the frequency range of 0.01-0.005 Hz, which was ca. twice that measured for the SWCNT actuator, and the maximum generated stress was ca. 1.8-2.5 times larger than that observed for the SWCNT actuator. Therefore, the common CNT activated MWCNT actuator can generate a maximum stress sufficient for practical purposes without using specialized SWCNT. Furthermore, the actuator containing MWCNT-COOH performed better than those containing SWCNTs or MWCNTs, and gave a more rapid response.