Ko Hao-Wen, Cheng Ming-Hsiang, Chi Mu-Huan, Chang Chun-Wei, Chen Jiun-Tai
Department of Applied Chemistry, National Chiao Tung University , Hsinchu, Taiwan 30010.
Langmuir. 2016 Mar 1;32(8):2110-6. doi: 10.1021/acs.langmuir.5b04746. Epub 2016 Feb 15.
We demonstrate a novel wetting method to prepare hierarchical polymer films with polymer nanotubes on selective regions. This strategy is based on the selective wetting abilities of polymer chains, annealed in different solvent vapors, into the nanopores of porous templates. Phase-separated films of polystyrene (PS) and poly(methyl methacrylate) (PMMA), two commonly used polymers, are prepared as a model system. After anodic aluminum oxide (AAO) templates are placed on the films, the samples are annealed in vapors of acetic acid, in which the PMMA chains are swollen and wet the nanopores of the AAO templates selectively. As a result, hierarchical polymer films containing PMMA nanotubes can be obtained after the AAO templates are removed. The distribution of the PMMA nanotubes of the hierarchical polymer films can also be controlled by changing the compositions of the polymer blends. This work not only presents a novel method to fabricate hierarchical polymer films with polymer nanotubes on selective regions, but also gives a deeper understanding in the selective wetting ability of polymer chains in solvent vapors.
我们展示了一种新颖的润湿方法，用于在选择性区域制备带有聚合物纳米管的分级聚合物薄膜。该策略基于在不同溶剂蒸汽中退火的聚合物链进入多孔模板纳米孔的选择性润湿能力。以两种常用聚合物聚苯乙烯（PS）和聚甲基丙烯酸甲酯（PMMA）的相分离薄膜作为模型体系。将阳极氧化铝（AAO）模板置于薄膜上后，样品在乙酸蒸汽中退火，其中PMMA链会溶胀并选择性地润湿AAO模板的纳米孔。结果，在去除AAO模板后可获得包含PMMA纳米管的分级聚合物薄膜。分级聚合物薄膜中PMMA纳米管的分布也可通过改变聚合物共混物的组成来控制。这项工作不仅提出了一种在选择性区域制备带有聚合物纳米管的分级聚合物薄膜的新方法，还加深了对聚合物链在溶剂蒸汽中选择性润湿能力的理解。
