Solvent Tunable Self-Assembly of Amphiphilic Rod–Coil Block Copolymers with Chiral, Helical Polycarbodiimide Segments: Polymeric Nanostructures with Variable Shapes and Sizes
Solvent Tunable Self-Assembly of Amphiphilic Rod–Coil Block Copolymers with Chiral, Helical Polycarbodiimide Segments: Polymeric Nanostructures with Variable Shapes and Sizes
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DOI：
10.1021/acs.macromol.5b01564
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发表时间：
2015-09
期刊：
影响因子：
5.5
通讯作者：
James F. Reuther;Dumindika A. Siriwardane;Raymond Campos;B. Novak
中科院分区：
文献类型：
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作者：
James F. Reuther;Dumindika A. Siriwardane;Raymond Campos;B. Novak
利用动态光散射（DLS）和扫描模式原子力显微镜（AFM）研究了四种两亲性棒状-卷曲二嵌段和三嵌段共聚物与手性棒状聚（N-1-苯乙基-N ′-甲基碳二亚胺）（PPMC）和无规卷曲亲水性聚乙二醇（PEG）的纳米级自组装.这种自组装被证明是高度可调的，简单地改变浓度和化学结构的亲水性选择性溶剂和/或共混的共聚物与聚碳化二亚胺均聚物。当旋涂稀释（c = 0.5毫克/毫升）的THF/H2O的解决方案，这些有趣的聚合物采用简单的球形胶束或球形聚合物囊泡，这取决于用于溶解的H2O的相对量。切换选择性溶剂从水到甲醇诱导的聚集行为的变化，证明了DLS和AFM，有趣的胶束和nanomaggot胶束组装时，从稀THF/MeOH溶液旋涂观察。高分子量PPMC均聚物与B共混.
The nanoscale self-assembly of four amphiphilic rod–coil di- and triblock copolymers with chiral, rodlike poly(N-1-phenethyl-N′-methylcarbodiimide) (PPMC) segments and random coil, hydrophilic PEG blocks has been investigated using dynamic light scattering (DLS) and tapping-mode atomic force microscopy (AFM). This self-assembly proved to be highly tunable simply upon altering the concentration and chemical structure of the hydrophilic selective solvent and/or blending the copolymers with polycarbodiimide homopolymer. When spin-coated from dilute (c = 0.5 mg/mL) THF/H2O solutions, these interesting polymers adopted either simple spherical micelles or spherical polymersomes depending on the relative amount of H2O used for dissolution. Switching selective solvent from H2O to MeOH induced changes in aggregation behavior, as evidenced by DLS and AFM, with interesting nanoworm and nanomaggot micelle assemblies observed when spin-coated from dilute THF/MeOH solutions. Blending high-MW PPMC homopolymer with the b...