Self-Assembly of Pluronic F127 Diacrylate in Ethylammonium Nitrate: Structure, Rheology, and Ionic Conductivity before and after Photo-Cross-Linking,Macromolecules

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Self-Assembly of Pluronic F127 Diacrylate in Ethylammonium Nitrate: Structure, Rheology, and Ionic Conductivity before and after Photo-Cross-Linking
Macromolecules ( IF 5.1 ) Pub Date : 2016-07-15 00:00:00 , DOI: 10.1021/acs.macromol.6b00205
Carlos R. López-Barrón ₁ , Ru Chen ₂ , Norman J. Wagner ₂ , Peter J. Beltramo _{2,

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Affiliation

The self-assembly of an end-functionalized PEO₁₀₆–PPO₇₀–PEO₁₀₆ triblock copolymer (BCP) with acrylic end groups (Pluronic F127 diacrylate or FDA) in a protic ionic liquid (deuterated ethylammonium nitrate, dEAN) is studied using small-angle neutron scattering, shear rheology, and dielectric spectroscopy. This functionalization constitutes less than 1 wt % of the copolymer and has no effect on micelle formation in dEAN. The sol–gel transition and the supramolecular crystal structure of the concentrated FDA/dEAN solutions are also found to be unaffected by the acrylation of the end groups. Photo-cross-linking results in viscoelasticity enhancement of the FDA/dEAN solutions with FDA contents below the gel point. Cross-linking gels produces soft elastomers with exceptional elasticity and conductivity comparable to the un-cross-linked solutions. Tuning BCP microstructure via self-assembly in ionic liquids followed by chemical cross-linking is shown to be a promising route for the design of materials with specific mechanical properties and ionic conductivities.

中文翻译：

Pluronic F127二丙烯酸酯在硝酸乙酯中的自组装：光交联之前和之后的结构，流变学和离子电导率

最终功能化的PEO ₁₀₆ –PPO ₇₀ –PEO ₁₀₆的自组装使用小角度中子散射，剪切流变学和介电谱研究了质子离子液体（氘代硝酸乙基铵，dEAN）中具有丙烯酸端基（Pluronic F127二丙烯酸酯或FDA）的三嵌段共聚物（BCP）。该官能化构成共聚物的少于1wt％，并且对dEAN中的胶束形成没有影响。还发现浓缩的FDA / dEAN溶液的溶胶-凝胶转变和超分子晶体结构不受端基丙烯酸化的影响。光交联导致FDA / dEAN溶液的粘弹性增强，且FDA含量低于胶凝点。交联凝胶产生的软弹性体具有与未交联溶液相当的出色弹性和导电性。

更新日期：2016-07-15

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