卷曲的状形态过渡是由可排列的中位素排序效应驱动的,来自光盘式中位素含有区块共聚物
Huanzhi Yang1, Yunjun Luo1,2, Bixin Jin3
1School of Materials Science and Engineering. Beijing Institute of Technology, 100081, Beijing, China.
Nature communications
|April 5, 2024
概括
这项研究揭示了液晶块共聚物是如何自组装成各种纳米结构的. 兴奋剂加速过渡,使人能够控制形态,并通过核化生长机制产生均的纤维.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 超分子化学 超分子化学
背景情况:
- 块共聚合物自组装成具有可调节性质的纳米结构.
- 液晶中位素引入了秩序效应,但可能导致缓慢的动力学和转移稳定的形态学.
- 了解自我组装机制是控制纳米结构形成的关键.
研究的目的:
- 为了研究液晶块共聚物与三烯光盘介质的液晶块共聚物的自我组装行为.
- 探索小分子兴奋剂对自我组装动力学和形态学的影响.
- 阐明潜在的自我组装机制及其对纳米结构形成的影响.
主要方法:
- 液晶块共聚合物的合成,其中含有三乙烯光盘性介质素.
- 在不同条件下 (无兴奋剂和兴奋剂) 进行溶液自组装研究.
- 使用传输电子显微镜 (TEM) 和小角度X射线散射 (SAXS) 等技术进行形态特征化.
- 自播实验,以评估兴奋剂对组装机制的影响.
主要成果:
- 块共聚物表现出自发的多重形态转变,由内在的液晶结晶秩序驱动.
- 使用小分子兴奋剂的兴奋剂极大地加快了形态转变,并导致了异国情调的小细胞形成.
- 高水平的兴奋剂将自我组装机制从分子内链混合转变为核化增长模式.
- 具有高兴奋剂的自我播种实验产生高度均的纤维.
结论:
- 液晶块共聚合物的自我组装对微妙的排序效应和诸如兴奋剂之类的外部刺激非常敏感.
- 兴奋剂提供了一种强大的策略来控制自组装动力学,形态学和机制.
- 在高兴奋剂下转向核化生长机制,使得能够产生统一的纳米结构,如纤维.
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