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首页> 外文期刊>RSC Advances >Composite PS-b-P4VP/Ag and PS-b-P4VP/Au thin films fabricated via a multilevel self-assembly process
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Composite PS-b-P4VP/Ag and PS-b-P4VP/Au thin films fabricated via a multilevel self-assembly process

机译：复合PS-B-P4VP / AG和PS-B-P4VP / Au薄膜通过多级自组装过程制造

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摘要

Thin composite films with paralleled nanowire or planar sheet morphologies doped with Ag or Au species were fabricated at the air/liquid interface. The fabrication process involves a series of steps, including the mass transfer of polystyrene- b -poly(4-vinylpyridine) (PS- b -P4VP) across a liquid/liquid interface between a DMF/CHCl _(3) solution and an aqueous solution containing either Ag ~(+) or AuCl _(4) ~(?) , self-assembly of the PS- b -P4VP and the inorganic species in the mixed DMF and water solution, and adsorption and further self-organization of the formed aggregates at the air/liquid interface. Noble metal ions and nanoparticles that formed during the fabrication process can be incorporated into the polymer matrices directly. The film morphology can be controlled through tuning the existential state and critical packing parameter of the polymer molecules. It was also found that the film morphology of PS- b -P4VP is distinctly different from that of PS- b -P2VP, indicating the great influence of the molecular structure on the self-assembly behavior of block copolymers. In addition, these composite thin films exhibit effective heterogeneous catalytic properties for hydrogenation of nitroaromatics in aqueous solutions.
机译：在空气/液体界面处制造掺杂有Ag或Au物种的平行纳米线或平面片形态的薄复合膜。制造过程涉及一系列步骤，包括在DMF / CHCl _（3）溶液和水性之间的液体/液体界面上的聚苯乙烯-B-Poly（4-乙烯基吡啶）（PS-B-PYIDINE）（PS-B-B4VP）的传质。含有Ag〜（+）或AuCl _（4）〜（α）的溶液，PS-B -P4VP的自组装和混合DMF和水溶液中的无机物种，以及吸附和进一步的自我组织在空气/液体界面形成聚集体。在制造过程中形成的贵金属离子和纳米颗粒可以直接掺入聚合物基质中。可以通过调节聚合物分子的存在状态和关键填充参数来控制膜形态。还发现PS-B-P4VP的薄膜形态与PS-B-B2VP的薄膜形态明显不同，表明分子结构对嵌段共聚物的自组装行为的影响很大。此外，这些复合薄膜在水溶液中表现出有效的非均相催化性质，用于硝基甲酰基的氢化。

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