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两多类块共聚物的pH依赖溶液状结构,具有位置控制的电离性位点

Meng Zhang¹, Yun Liu², Xiaobing Zuo³

¹Department of Chemistry and Macromolecular Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States.

Biomacromolecules

|July 21, 2023

概括

控制块共聚合物 (BCP) 中的电离性位点位置会影响微粒结构. 这项研究表明,精确的放置使得可调节pH的静电和液晶相互作用能够适合定制的微粒组件.

科学领域:

聚合物化学聚合物化学
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:

离子块共聚合物 (BCP) 的溶液化得到了很好的研究,但控制的电离位点定位的影响不太清楚.
带有定义的电离站点位置的体多体BCP提供了一个研究结构-属性关系的平台.

研究的目的:

为了合成具有不同电离性位点位置的两性多类BCP.
研究这些BCP的pH依赖的化行为和状结构.
阐明电离位点定位如何影响微粒内的静电和液晶相互作用.

主要方法:

序列环开放聚合用于BCP合成.
负染色传递电子显微镜 (TEM).
小角度中子散射 (SANS) 和小角度X射线散射 (SAXS).

主要成果:

观察到具有液晶 (LC) 域的球形和棒状菌体.
细胞结构,包括聚合数和链包装,取决于溶液pH值和电离位点位置.
静电和LC相互作用是通过电离性位点放置和溶液pH调节的.

结论:

沿BCP链的电离性位点的定位是控制细胞结构的关键因素.
这种控制允许在广泛的pH范围内的水溶液中量身定制微粒组件.
这些发现为通过精确的聚合物架构设计先进的功能材料提供了潜力.

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