Confined and Directed Polymer Crystallization at Curved Liquid/Liquid Interface
Confined and Directed Polymer Crystallization at Curved Liquid/Liquid Interface
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DOI：
10.1002/macp.201700455
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发表时间：
2018-02
影响因子：
2.5
通讯作者：
Mark C. Staub;Christopher Y. Li
中科院分区：
文献类型：
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作者：
Mark C. Staub;Christopher Y. Li
球形晶体在自然界中是普遍存在的，并且在平面晶体中看不到的平移对称性的必要断裂使它们在结构上独特。聚合物晶体已显示出非平坦的形态，但控制它们的形成是难以实现的。一种策略是通过在空间和/或时间上调节链段移动性来指导结晶。这已经在早期使用聚合物共混物或聚合物/溶剂系统进行了研究，其中将液-液相分离与结晶相结合可以提供形态控制。在这篇趋势文章中，最近的趋势是使用细乳液系统作为纳米级限制链段的流动性进行审查。在这个长度尺度的限制导致独特的功能，出现在有序过程中，如液-液相分离和结晶，没有观察到在宏观尺度。这种方法的通用性使其成为指导形成可用于许多应用的新的和独特的分层聚合物纳米结构的良好候选者。
Spherical crystals are ubiquitous in nature and the necessary breaks in translational symmetry not seen in flat crystals render them structurally unique. Polymer crystals have been shown to exhibit nonflat morphologies, but control over their formation is difficult to achieve. One strategy is directing the crystallization by spatially and/or temporally tuning chain segmental mobility. This has been studied early on using polymer blends or polymer/solvent systems where coupling liquid–liquid phase separation with crystallization could provide morphological control. In this Trend article, a recent trend in using miniemulsion systems to act as nanoscale confinement on chain segmental mobility is reviewed. The confinement at this length scale causes unique features to arise in ordering processes such as liquid–liquid phase separation and crystallization that are not observed at the macroscale. The generality of this approach makes it a good candidate to direct the formation of new and unique hierarchical polymer nanostructures that could be utilized in numerous applications.