Institute of Applied Chemistry, National Chiao Tung University, Hsin Chu, 300 Taiwan.
Langmuir. 2011 Aug 16;27(16):10197-205. doi: 10.1021/la201506y. Epub 2011 Jul 12.
We have investigated the complexation-induced phase behavior of the mixtures of poly(styrene-b-4-vinylpyridine) (PS-b-P4VP) and octyl gallate (OG) due to hydrogen bonding in different solvents. The Fourier transform infrared spectroscopic result indicates that the hydrogen-bonding was formed between the P4VP blocks and OG in both THF and DMF, implying the P4VP blocks can bind to OG. For PS-b-P4VP/OG mixture in chloroform, the morphological transitions were induced from the unimer configuration to swollen aggregate and complex-micelles by adding OG. Interestingly, the complex-micelles can lead the formation of the honeycomb structure from chloroform solution. The PS-b-P4VP/OG mixture in THF, behaving an amphiphilic diblock copolymer in solution state, exhibited a series of morphological transitions from sphere, pearl-necklace-liked rod, worm-liked rod, vesicle, to core-shell-corona aggregates by increasing the OG content. In contrast, the PS-b-P4VP/OG mixture in DMF maintained the unimer configuration upon adding OG. Therefore, the complexation-induced morphology of the mixtures of PS-b-P4VP and OG can be mediated by adopting different common solvents to affect the self-assembly behavior.
我们研究了由于氢键作用，在不同溶剂中聚苯乙烯-嵌段-4-乙烯基吡啶（PS-b-P4VP）和辛基没食子酸酯（OG）混合物的加合物诱导相行为。傅里叶变换红外光谱结果表明，在 THF 和 DMF 中，P4VP 嵌段与 OG 之间形成了氢键，这意味着 P4VP 嵌段可以与 OG 结合。对于 PS-b-P4VP/OG 在氯仿中的混合物，通过添加 OG 从单体构型诱导到溶胀聚集体和复合胶束的形态转变。有趣的是，复合胶束可以导致从氯仿溶液中形成蜂窝状结构。PS-b-P4VP/OG 在 THF 中的混合物在溶液状态下表现为两亲性嵌段共聚物，通过增加 OG 含量，从球体、珠串状棒、蠕虫状棒、囊泡到核壳冠状聚集体，表现出一系列形态转变。相比之下，在添加 OG 时，PS-b-P4VP/OG 在 DMF 中的混合物保持单体构型。因此，通过采用不同的常见溶剂来影响自组装行为，可以调节 PS-b-P4VP 和 OG 混合物的加合物诱导形态。
