Influence of gold species (AuCl4- and AuCl2-) on self-assembly of PS-b-P2VP in solutions and morphology of composite thin films fabricated at the air/liquid interfaces

被引:7
作者
Zhao, Xingjuan [1 ]
Wang, Qian [1 ]
Zhang, Xiaokai [2 ]
Lee, Yong-Ill [3 ]
Liu, Hong-Guo [1 ]
机构
[1] Shandong Univ, Educ Minist, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
[2] Shandong Normal Univ, Coll Phys & Elect, Jinan 250014, Peoples R China
[3] Changwon Natl Univ, Dept Chem, Anastro Lab, Chang Won 641773, South Korea
基金
中国国家自然科学基金;
关键词
LIQUID/LIQUID INTERFACE; DIBLOCK COPOLYMERS; BLOCK-COPOLYMERS; LANGMUIR MONOLAYERS; TRIBLOCK COPOLYMER; FOAM FILMS; NANOPARTICLES; AIR/WATER; NANOWIRE; POLYMER;
D O I
10.1039/c5cp06267e
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Composite thin films doped with Au species were fabricated at an air/liquid interface via a series of steps, including the mass transfer of polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) across the liquid/liquid interface between a DMF/CHCl3 solution and an aqueous solution containing either AuCl4(-) or AuCl2(-), self-assembly of PS-b-P2VP in a mixed DMF-water solution, and adsorption and further self-organization of the formed aggregates at the air/liquid interface. This is a new approach for fabricating composite polymer films and can be completed within a very short time. AuCl4- and AuCl2- ions were found to significantly influence the self-assembly behavior of the block copolymer and the morphologies of the composite films, leading to the formation of nanowire arrays and a foam structure at the air/liquid interface, respectively, which originated from rod-like micelles and microcapsules that had formed in the respective solutions. The effect of the metal complex was analyzed based on the packing parameters of the amphiphilic polymer molecules in different microenvironments and the interactions between the pyridine groups and the metal chloride anions. In addition, these composite thin films exhibited stable and durable performance as heterogeneous catalysts for the hydrogenation of nitroaromatics in aqueous solutions.
引用
收藏
页码:1945 / 1952
页数:8
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