Bicontinuous Ion-Exchange Materials through Polymerization-Induced Microphase Separation
Bicontinuous Ion-Exchange Materials through Polymerization-Induced Microphase Separation
复制标题
通过聚合诱导微相分离的双连续离子交换材料
DOI：
10.1021/acsmacrolett.0c00684
复制
发表时间：
2021
影响因子：
7.015
通讯作者：
Hillmyer, Marc A.
中科院分区：
文献类型：
--
作者：
Goldfeld, David J.;Silver, Eric S.;Valdez, José M.;Hillmyer, Marc A.
聚合诱导的微相分离已被用于制备含有双连续和纳米结构聚合物域的固体交联单体。我们用这种方法在中性苯乙烯/二乙烯基苯衍生的基质中制造了一个含有负电荷或正电荷的聚电解质域的单体。首先，这些材料是由含有屏蔽带电基团的中性预离子聚合物制成的。然后用三甲胺处理将所述单体体功能化至带电状态；小角x射线散射显示聚合后改性后微相分离结构没有明显的形态变化。通过与材料中的反离子交换染料，我们证实了带电畴的连续性。通过离子交换容量的测量，我们根据宏链转移剂的摩尔质量和负载来估计材料中可访问电荷的数量。
Polymerization-induced microphase separation has been used to prepare solid cross-linked monoliths containing bicontinuous and nanostructured polymer domains. We use this process to fabricate a monolith containing either a negatively or positively charged polyelectrolyte domain inside of the neutral styrene/divinylbenzene-derived matrix. First, the materials are made with a neutral pre-ionic polymer containing masked charged groups. The monoliths are then functionalized to a charged state by treatment with trimethylamine; small-angle X-ray scattering shows no significant morphological change in the microphase-separated structure upon postpolymerization modification. By exchanging dyes with the counterions in the material, we corroborated the continuity of the charged domains. Using ion-exchange capacity measurements, we estimate the number of accessible charges within the material based on macro-chain transfer agent molar mass and loading.