Fabrication of Surface Polymer Brushes Via Thin Film Crystallization and Solvent Annealing
Fabrication of Surface Polymer Brushes Via Thin Film Crystallization and Solvent Annealing
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通过薄膜结晶和溶剂退火制造表面聚合物刷
DOI：
10.1002/marc.202300036
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发表时间：
2023
影响因子：
4.6
通讯作者：
Li, Christopher Y.
中科院分区：
文献类型：
--
作者：
Wilk, Jeffrey T.;Chancellor, Andrew J.;Mei, Shan;Qian, Qian;Zhao, Bin;Li, Christopher Y.
聚合物单晶被用作模板来合成聚合物刷，被称为“聚合物-单晶-辅助-接枝-接枝”（PSCAGT）方法。聚合物刷具有可控的接枝密度和空间系链位置。以往的工作主要集中在溶液结晶上，这涉及到大量的有机溶剂，接枝密度只能通过改变结晶温度来调节。在这项工作中，薄膜结晶被用于在平面上制造二维聚合物晶体。随后的化学系绳作用使得聚合物刷能够高保真地保持晶体的原始形态。此外，用该方法制备的聚合物刷的接枝密度取决于链端在晶体上/下表面的分布，这可以通过在各种非溶剂介质中退火晶体来方便地控制。这项工作拓宽了PSCAGT方法的范围，为实现具有可控结构的聚合物刷提供了一条新的途径。
Polymer single crystals are used as templates to synthesize polymer brushes, known as the “polymer‐single‐crystal‐assisted‐grafting‐to” (PSCAGT) approach. Polymer brushes with controlled grafting densities and spatial tethering locations are demonstrated. Previous works focused on solution crystallization, which involves large amounts of organic solvent, and the grafting density can only be tuned by varying crystallization temperatures. In this work, thin film crystallization is utilized to fabricate 2D polymer crystals on flat surfaces. Subsequent chemical tethering leads to polymer brushes that retain the original morphology of the crystals with high fidelity. Furthermore, it is shown that the grafting density of the polymer brushes fabricated using this method depends on the chain end distribution on the top/bottom surfaces of the crystal, which can be facilely controlled by annealing the crystals at various nonsolvent media. This work broadens the scope of the PSCAGT method and provides a new route to achieve polymer brushes with controlled structures.