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Nanostructured Films of Oppositely Charged Domains from Self-Assembled Block Copolymers
Macromolecules ( IF 5.1 ) Pub Date : 2020-07-02 , DOI: 10.1021/acs.macromol.0c00707 Brandon A. Fultz 1 , Tanguy Terlier 2 , Beatriz Dunoyer de Segonzac 1 , Rafael Verduzco 3 , Justin G. Kennemur 1
Macromolecules ( IF 5.1 ) Pub Date : 2020-07-02 , DOI: 10.1021/acs.macromol.0c00707 Brandon A. Fultz 1 , Tanguy Terlier 2 , Beatriz Dunoyer de Segonzac 1 , Rafael Verduzco 3 , Justin G. Kennemur 1
Affiliation
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The exploration of poly(tert-butyl methacrylate)-block-poly(4-vinylpyridine), PtBMA-b-P4VP, as a precursor material for the creation of nanostructured films with oppositely charged domains is reported. Thin films of hexagonally packed P4VP cylinders were self-assembled perpendicular to the surface and subsequently treated with bromoethane vapor at various times to quaternize pyridinyl nitrogens. The PtBMA matrix was then partially hydrolyzed to poly(methacrylic acid), PMAA, through HCl vapor treatment followed by neutralization by brief submersion in KOH solution. Under optimal treatment conditions, atomic force microscopy and contact angle measurements confirm that the film morphologies remain intact and become more hydrophilic. Time-of-flight secondary ion mass spectrometry confirms the presence and location of specific anions and cations within each domain throughout the block copolymer film and corroborates successful ionization during each treatment step. These results bolster the viability of PtBMA-b-P4VP as a suitable material for creating self-assembled nanostructures bearing oppositely charged domains under relatively facile conditions and open the door to future investigations for their potential application in charged mosaic membranes.
中文翻译：
自组装嵌段共聚物带正电荷域的纳米结构薄膜
聚的探索（叔丁基甲基丙烯酸酯） -嵌段-聚（4-乙烯基吡啶），PtBMA- b报道了-P4VP，其是用于产生带相反电荷域的纳米结构薄膜的前体材料。六角形包装的P4VP圆柱体的薄膜垂直于表面进行自组装，然后在不同时间用溴乙烷蒸气处理，以使吡啶基氮季铵化。然后通过HCl蒸气处理将PtBMA基质部分水解为聚（甲基丙烯酸）PMAA，然后通过短暂浸入KOH溶液进行中和。在最佳处理条件下，原子力显微镜和接触角测量证实了膜的形态保持完整并变得更加亲水。飞行时间二次离子质谱仪确定了整个嵌段共聚物膜中每个域中特定阴离子和阳离子的存在和位置，并证实了每个处理步骤中成功的电离。这些结果增强了PtBMA-b- P4VP是一种合适的材料，可用于在相对容易的条件下产生带有相反电荷域的自组装纳米结构，并为它们在带电镶嵌膜中的潜在应用打开了大门。
更新日期：2020-07-14
中文翻译：
自组装嵌段共聚物带正电荷域的纳米结构薄膜
聚的探索（叔丁基甲基丙烯酸酯） -嵌段-聚（4-乙烯基吡啶），PtBMA- b报道了-P4VP，其是用于产生带相反电荷域的纳米结构薄膜的前体材料。六角形包装的P4VP圆柱体的薄膜垂直于表面进行自组装，然后在不同时间用溴乙烷蒸气处理，以使吡啶基氮季铵化。然后通过HCl蒸气处理将PtBMA基质部分水解为聚（甲基丙烯酸）PMAA，然后通过短暂浸入KOH溶液进行中和。在最佳处理条件下，原子力显微镜和接触角测量证实了膜的形态保持完整并变得更加亲水。飞行时间二次离子质谱仪确定了整个嵌段共聚物膜中每个域中特定阴离子和阳离子的存在和位置，并证实了每个处理步骤中成功的电离。这些结果增强了PtBMA-b- P4VP是一种合适的材料，可用于在相对容易的条件下产生带有相反电荷域的自组装纳米结构，并为它们在带电镶嵌膜中的潜在应用打开了大门。
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