Brush Polymers as Nanoscale Building Blocks for Hydrogel Synthesis
Brush Polymers as Nanoscale Building Blocks for Hydrogel Synthesis
复制标题
刷状聚合物作为水凝胶合成的纳米级构件
DOI：
10.1021/acs.chemmater.1c01585
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发表时间：
2021
影响因子：
8.6
通讯作者：
Macfarlane Robert J.
中科院分区：
文献类型：
--
作者：
Jia Fei;Song Jake;Kubiak Joshua M.;Onoda Michika;Santos Peter J.;Sano Koki;Holten-Andersen Niels;Zhang Ke;Macfarlane Robert J.
高分支官能度（f）材料作为水凝胶的结构单元已经获得了显著的关注，因为它们形成丰富的网络连接的能力产生了机械上坚固的凝胶，其可以潜在地耐受拓扑缺陷的负面影响。在这里，我们报告的合成水凝胶使用刷聚合物和调查的影响bothfand聚合物的拓扑结构对所得的水凝胶的机械性能。我们的研究表明，这两个highfand的扩展构象的聚合物刷，归因于纳米级形状的刷聚合物使他们能够表现出升高的凝胶刚度，并能有效地减少拓扑缺陷的影响，诱导凝胶化在低得多的交联浓度，并显示抑制溶胀与凝胶更灵活的聚合物。此外，由于刷状聚合物在溶液中采用离散的纳米颗粒状形态，因此在沿着刷表面的不同点处定制交联基团的位置允许不同的拓扑连接性（例如，侧对侧和端对端），进一步控制交联网络的所得机械性能。因此，刷状聚合物具有高度可调的机械和物理性能的水凝胶和受凝胶网络拓扑结构的影响的结构-性能关系的调查有前途的积木。
High branch functionality (f) materials have garnersed significant attention as building blocks for hydrogels as their ability to form abundant network connections yields mechanically robust gels that can potentially tolerate the negative effects of topological defects. Herein, we report the synthesis of hydrogels using brush polymers and investigate the influence of bothfand polymer topology on the mechanical properties of resulting hydrogels. Our study suggests that both the highfand the extended conformation of polymer brushes that are attributed to the nanoscale shape of the brush polymers enable them to exhibit elevated gel stiffness and can effectively minimize the effects of topological defects, induce gelation at much lower cross-link concentrations, and display restrained swelling compared with gels made with more flexible polymers. In addition, because the brush polymers adopt discrete nanoparticle-like morphologies in solution, tailoring the location of the cross-linking groups at different points along the brush surface allows for different topological connectivities (e.g., side-to-side and end-to-end) to be generated, further controlling the resulting mechanical properties of the cross-linked networks. Brush polymers are therefore promising building blocks for hydrogels with highly tunable mechanical and physical properties and for the investigation of structure–property relationships affected by the gel network topology.
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