Core-crosslinked worm-like micelles from polyether-based diblock terpolymers
Core-crosslinked worm-like micelles from polyether-based diblock terpolymers
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由聚醚基二嵌段三元共聚物制成的核交联蠕虫状胶束
DOI：
10.1039/c9py01054h
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发表时间：
2019
影响因子：
4.6
通讯作者：
F. H. Schacher
中科院分区：
文献类型：
--
作者：
J. K. Elter;P. Biehl;M. Gottschaldt;F. H. Schacher
本文报道了不同聚醚基二嵌段三元聚合物在水溶液中的合成、纯化和随后的自组装。在阴离子开环聚合（AROP）中，PEO均被用作亲水性大引发剂，而疏水嵌段是由不同的疏水缩水甘油酯形成的，因此，DP的变化也影响了作为选择性溶剂的水中的胶束形态。应用具有空间要求的支链脂肪族缩水甘油醚（2-乙基己基缩水甘油醚（EHGE），或己基己基甘油缩水甘油醚（HHGGE））或芳香型缩水甘油醚（苄基缩水甘油醚（BGE）或烷基缩水甘油醚（NGE））作为疏水嵌段的主要共聚单体，对溶液中自组装形成的形态有明显影响。总的来说，我们在相应的相图中观察到形成蠕虫状结构的相当宽的窗口。此外，10%的糠酰缩水甘油醚（FGE）加入到二嵌段三元聚合物的疏水嵌段中，以实现胶束核的后续交联。因此，热诱导Diels-Alder反应可以成功地利用在交联之前被包裹在胶束核心中的疏水双马来酰亚胺。我们还进行了关于交联聚集体的超声处理的第一次实验，揭示了从先前定义明确的丝束形成分支的蠕虫状结构。通过光散射（DLS）和透射电子显微镜（cro - tem）研究了所有溶液的结构以及交联虫状胶束的实验。
We herein report on the synthesis, purification and subsequent self-assembly of different polyether-based diblock terpolymers in aqueous solutions. While in all cases PEO was used as hydrophilic macroinitiator in anionic ring opening polymerization (AROP), the hydrophobic block was formed by different hydrophobic glycidyl ethers, thereby and by variation of the DP also influencing micellar morphologies in water as selective solvent. The application of sterically demanding, branched aliphatic glycidyl ethers (2-ethylhexyl glycidyl ether (EHGE), or hexyl, hexyl glyceryl glycidyl ether (HHGGE)) or aromatic glycidyl ethers (benzyl glycidyl ether (BGE) or naphthyl glycidyl ether (NGE)) as main comonomer for the hydrophobic block showed distinct influence on the morphologies formed by self-assembly in solution. In general, we observed a comparably broad window in the corresponding phase diagram for the formation of worm-like structures. Further, 10% of furfuryl glycidyl ether (FGE) was incorporated in the hydrophobic block of the diblock terpolymers to enable subsequent crosslinking of the micellar core. Hereby, thermally induced Diels–Alder reactions using a hydrophobic bismaleimide which was encapsulated in the micellar core prior to crosslinking could be successfully employed. We also carried out first experiments regarding ultrasound treatment of the crosslinked aggregates, revealing the formation of branched worm-like structures from previously well-defined filomicelles. All solution structures as well as the experiments on crosslinked worm-like micelles were investigated via light scattering (DLS) and transmission electron microscopy (cryo-TEM).
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