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Tetra-PEG Network Containing Ionic Liquid Synthesized via Michael Addition Reaction and Its Application to Polymer Actuator
Macromolecules ( IF 5.1 ) Pub Date : 2017-03-23 00:00:00 , DOI: 10.1021/acs.macromol.6b02750 Shunta Ishii 1 , Hisashi Kokubo 1 , Kei Hashimoto 1 , Satoru Imaizumi 1 , Masayoshi Watanabe 1
Macromolecules ( IF 5.1 ) Pub Date : 2017-03-23 00:00:00 , DOI: 10.1021/acs.macromol.6b02750 Shunta Ishii 1 , Hisashi Kokubo 1 , Kei Hashimoto 1 , Satoru Imaizumi 1 , Masayoshi Watanabe 1
Affiliation
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Ion gels consisting of poly(ethylene glycol) (PEG) network and ionic liquids were synthesized via Michael addition reaction using tetra-arm PEG (tetra-PEG) precursors with amino groups and maleimide groups at the chain ends. The use of the addition reaction to synthesize the tetra-PEG networks ensures that any byproducts, which may influence the electrochemical properties of the obtained gel, are not released in the reaction system. Fourier transform infrared (FT-IR) spectra, gel fraction, and rheological measurements indicated the progress of the addition reaction. A polymer network started to be formed after 2 h when the two tetra-PEG precursors were mixed in an ionic liquid at polymer concentrations above overlap concentration (= 7.2 wt %). From tensile test, the elastic modulus of the ion gel was estimated to be lower than that of conventional hydrogel, indicating some flaws in the network. Compared with the theoretical elastic modulus for tetra-PEG network, the reaction efficiency of the tetra-PEG ion gel (10 wt %) using the Michael addition reaction was ca. 80%, which was lower than that of conventional hydrogels using condensation reaction (ca. 90%). However, a Mooney–Rivlin plot of the ion gel indicates that the polymer network has few loop chains and entanglements and relatively homogeneous structure. The fracture energy of the tetra-PEG ion gels (10 wt %) was more than 30 times higher than that of a 30 wt % PMMA ion gel prepared by conventional free radical polymerization. The improved strength of the tetra-PEG ion gel was caused by relatively few structural defects. Polymer actuators were fabricated using the tetra-PEG ion gel as an electrolyte layer by sandwiching the gel between two carbon electrodes. The tetra-PEG ion gel actuators showed greater durability than a PMMA ion gel actuator.
中文翻译：
通过迈克尔加成反应合成含离子液体的四聚乙二醇网络及其在聚合物促动器中的应用
通过使用链末端带有氨基和马来酰亚胺基团的四臂PEG（tetra-PEG）前体，通过迈克尔加成反应，合成了由聚乙二醇（PEG）网络和离子液体组成的离子凝胶。使用加成反应来合成四-PEG网络确保了可能影响所得凝胶的电化学性质的任何副产物不会在反应体系中释放。傅立叶变换红外（FT-IR）光谱，凝胶分数和流变学测量表明加成反应的进展。2小时后，当两种四-PEG前体在离子液体中以高于重叠浓度（= 7.2 wt％）的聚合物浓度混合时，开始形成聚合物网络。根据拉伸试验，估计离子凝胶的弹性模量低于常规水凝胶的弹性模量，表明该网络中存在一些缺陷。与四-PEG网络的理论弹性模量相比，使用迈克尔加成反应的四-PEG离子凝胶（10重量％）的反应效率为约1。80％，低于使用缩合反应的传统水凝胶（约90％）。但是，离子凝胶的Mooney-Rivlin图表明聚合物网络几乎没有环链和缠结，并且结构相对均匀。四-PEG离子凝胶（10wt％）的断裂能比通过常规自由基聚合制备的30wt％的PMMA离子凝胶的断裂能高30倍以上。四-PEG离子凝胶强度的提高是由相对较少的结构缺陷引起的。通过将凝胶夹在两个碳电极之间，使用四PEG离子凝胶作为电解质层来制造聚合物致动器。四-PEG离子凝胶促动器显示出比PMMA离子凝胶促动器更大的耐久性。
更新日期：2017-03-23
中文翻译：
通过迈克尔加成反应合成含离子液体的四聚乙二醇网络及其在聚合物促动器中的应用
通过使用链末端带有氨基和马来酰亚胺基团的四臂PEG（tetra-PEG）前体，通过迈克尔加成反应，合成了由聚乙二醇（PEG）网络和离子液体组成的离子凝胶。使用加成反应来合成四-PEG网络确保了可能影响所得凝胶的电化学性质的任何副产物不会在反应体系中释放。傅立叶变换红外（FT-IR）光谱，凝胶分数和流变学测量表明加成反应的进展。2小时后，当两种四-PEG前体在离子液体中以高于重叠浓度（= 7.2 wt％）的聚合物浓度混合时，开始形成聚合物网络。根据拉伸试验，估计离子凝胶的弹性模量低于常规水凝胶的弹性模量，表明该网络中存在一些缺陷。与四-PEG网络的理论弹性模量相比，使用迈克尔加成反应的四-PEG离子凝胶（10重量％）的反应效率为约1。80％，低于使用缩合反应的传统水凝胶（约90％）。但是，离子凝胶的Mooney-Rivlin图表明聚合物网络几乎没有环链和缠结，并且结构相对均匀。四-PEG离子凝胶（10wt％）的断裂能比通过常规自由基聚合制备的30wt％的PMMA离子凝胶的断裂能高30倍以上。四-PEG离子凝胶强度的提高是由相对较少的结构缺陷引起的。通过将凝胶夹在两个碳电极之间，使用四PEG离子凝胶作为电解质层来制造聚合物致动器。四-PEG离子凝胶促动器显示出比PMMA离子凝胶促动器更大的耐久性。
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