Synthesis of Monodisperse Silica Particles Grafted with Concentrated Ionic Liquid-Type Polymer Brushes by Surface-Initiated Atom Transfer Radical Polymerization for Use as a Solid State Polymer Electrolyte
Synthesis of Monodisperse Silica Particles Grafted with Concentrated Ionic Liquid-Type Polymer Brushes by Surface-Initiated Atom Transfer Radical Polymerization for Use as a Solid State Polymer Electrolyte
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DOI：
10.3390/polym8040146
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发表时间：
2016-04-01
期刊：
影响因子：
5
通讯作者：
Tsujii, Yoshinobu
中科院分区：
文献类型：
--
作者：
Morinaga, Takashi;Honma, Saika;Tsujii, Yoshinobu
采用铜原子转移自由基聚合法（ATRP）合成了一种可聚合离子液体N，N-二乙基-N-（2-甲基丙烯酰乙基）-N-甲基铵双（三氟甲基磺酰基）酰亚胺（DEMM-TFSI）。以活性方式进行聚合，产生目标分子量高达约400 K的明确定义的聚（DEMM-TFSI）（包括聚阳离子和抗衡阴离子）。通过GPC分析结合光散射测量确定的准确分子量，并且所获得的分子量值与从DEMM-TFSI的初始摩尔比和单体转化率计算的理论值表现出良好的一致性。成功地在不同粒径的单分散二氧化硅颗粒（SiPs）表面进行了表面引发ATRP，制备了接枝密度高达0.15链/nm（2）的具有良好结构的聚（DEMM-TFSI）接枝SiPs。由于由二氧化硅颗粒修饰的聚合物刷和离子液体制成的复合膜显示出相对高的离子电导率，我们评估了接枝刷链长度与离子电导率之间的关系。
A polymerizable ionic liquid, N,N-diethyl-N-(2-methacryloylethyl)-N-methylammonium bis(trifluoromethylsulfonyl) imide (DEMM-TFSI), was polymerized via copper-mediated atom transfer radical polymerization (ATRP). The polymerization proceeded in a living manner producing well-defined poly(DEMM-TFSI) of target molecular weight up to about 400 K (including a polycation and an counter anion). The accurate molecular weight as determined by a GPC analysis combined with a light scattering measurement, and the molecular weight values obtained exhibited good agreement with the theoretical values calculated from the initial molar ratio of DEMM-TFSI and the monomer conversion. Surface-initiated ATRP on the surface of monodisperse silica particles (SiPs) with various diameters was successfully performed, producing SiPs grafted with well-defined poly(DEMM-TFSI) with a graft density as high as 0.15 chains/nm(2). Since the composite film made from the silica-particle-decorated polymer brush and ionic liquid shows a relatively high ionic conductivity, we have evaluated the relationship between the grafted brush chain length and the ionic conductivity.