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Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

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在区块共聚合物囊泡中,层和插管.

Giuseppe Battaglia¹, Anthony J Ryan

¹Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K.

Journal of the American Chemical Society

|June 16, 2005

概括

两类块共聚乙烯形成厚度为2.47.5nm的膜. 疏水性块长度决定了膜厚度,与聚合物化的强分离理论保持一致.

科学领域:

聚合物科学聚合物科学
材料科学材料科学材料科学
超分子化学超分子化学

背景情况:

两类块共聚乙烯可以自组装成各种纳米结构.
了解这些自组装系统中的形态和链形状对于设计先进材料至关重要.

研究的目的:

为了研究由两类块共聚乙烯形成的自组装囊中的膜厚度和疏水性链形状.
将实验结果与理论预测进行比较,特别是强分离理论.

主要方法:

微角X射线散射 (SAXS) 用于确定膜结构和厚度.
电子显微镜 (EM) 用于可视化囊泡形态.
膜厚度的分析与疏水性块长度的缩放.

主要成果:

在双块和三块共聚乙烯中证实了囊泡形态.
膜厚度在2.4至7.5纳米之间.
观察到的膜厚度与疏水性块长度的缩放与强分离理论一致.

结论:

囊泡膜内的疏水链采用混合和拉伸的形状.
这种形状不同于以前对未被扰乱的高斯维度和双层结构的观察.

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