Nanoporous Double-Gyroid Structure from ABC Triblock Terpolymer Thick Films

IF 3.4 4区 化学 Q2 POLYMER SCIENCE
Karim Aissou, Maximilien Coronas, Daniel Hermida-Merino, Eduardo Solano, Didier Cot, Stéphanie Roualdes, Denis Bouyer, Damien Quemener
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Abstract

The creation of nanostructured materials with a triply periodic minimal surface (TPMS), defined as a zero mean curvature surface having periodicity in three-dimensional space, is an emerging solution to optimize transport (i.e., the ion-conductivity and hydraulic permeability) through the next-generation of electrolyte and ultrafiltration (UF) membranes. Here, we used an amphiphilic ABC-type block copolymer (BCP) (namely, polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) (PS-b-P2VP-b-PEO)) to generate symmetric thick films (~8 μm) composed entirely of a TPMS-based structure, consisting of a PS matrix with a double gyroid (DG) minimal surface and hydrophilic stimuli-responsive (P2VP/PEO) nanochannels. To produce the core/shell DG-structured monoliths, we used a process combining the nonsolvent-induced phase separation (NIPS) process with a solvent vapor annealing (SVA) treatment. From such symmetric ABC-type BCP-thick films generated by NIPS-SVA, a mean hydraulic permeability as high as 514 L h-1 m-2 bar-1 was measured. This mean value was revealed to be nearly equal to that of asymmetric PS-b-P2VP-b-PEO membranes manufactured by NIPS, which have a substructure with an implicit irregular and random distribution of the internal pore structure and a skin layer with P2VP/PEO nanopores arranged into a hexagonal array.
ABC三嵌段三元共聚物厚膜的纳米多孔双旋回结构
具有三周期最小表面(TPMS)的纳米结构材料的创造,被定义为在三维空间中具有周期性的零平均曲率表面,是通过下一代电解质和超滤膜优化传输(即离子电导率和水力渗透性)的新兴解决方案。在这里,我们使用两亲性的bc型嵌段共聚物(BCP)(即聚苯乙烯-嵌段聚(2-乙烯基吡啶)-嵌段聚(环氧乙烷)(PS-b-P2VP-b-PEO))生成完全由tpms结构组成的对称厚膜(~8 μm),该结构由具有双回线(DG)最小表面的PS矩阵和亲水刺激响应(P2VP/PEO)纳米通道组成。为了制备核心/壳结构的dg结构单体,我们采用了非溶剂诱导相分离(NIPS)工艺和溶剂蒸汽退火(SVA)处理相结合的工艺。在NIPS-SVA生成的对称abc型bcp厚膜中,平均水力渗透率高达514 L h-1 m-2 bar-1。结果表明,该平均值与NIPS公司生产的不对称PS-b-P2VP-b-PEO膜的平均值几乎相等,后者的子结构具有隐式的不规则和随机分布的内部孔结构,皮层由P2VP/PEO纳米孔排列成六边形阵列。
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来源期刊
CiteScore
6.10
自引率
0.00%
发文量
55
审稿时长
>12 weeks
期刊介绍: The International Journal of Polymer Science is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the chemistry and physics of macromolecules.
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