Microphase-separated structures of block copolymers (BCPs) have attracted considerable attention for their potential application in the bottom-up fabrication of 10 nm scale nanostructured materials. To realize sustainable development within this field, the creation of novel BCP materials from renewable biomass resources is of fundamental interest. Thus, we herein focused on maltoheptaose-b-poly(δ-decanolactone)-b-maltoheptaose (MH-b-PDL-b-MH) as a sustainable alternative for nanostructure-forming BCPs, in which both constitutional blocks can be derived from renewable biomass resources, in the case, δ-decanolactone and amylose. Well-defined MH-b-PDL-b-MHs with varying PDL lengths were synthesized through a combination of controlled/living ring-opening polymerization and the click reaction. The prepared MH-b-PDL-b-MHs successfully self-assembled into highly ordered hexagonal cylindrical structures with a domain-spacing of ∼12–14 nm in both the bulk and thin film states. Interestingly, the as-cast thin films of MH-b-PDL-b-MHs (with PDL lengths of 9K and 13K) form horizontal cylinders, with thermal annealing (180 °C, 30 min) resulting in a drastic change in the domain orientation from horizontal to vertical. Thus, the results presented herein demonstrated that the combination of oligosaccharides and biomass-derived hydrophobic polymers appears promising for the sustainable development of nanotechnology and related fields.

中文翻译：

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在基于生物质的嵌段共聚物中具有10 nm尺度周期性的高度有序的圆柱形态

嵌段共聚物（BCP）的微相分离结构因其在10纳米级纳米结构材料的自下而上制造中的潜在应用而吸引了相当多的关注。为了实现该领域内的可持续发展，从可再生生物质资源中创建新型BCP材料至关重要。因此，我们在此集中在maltoheptaose- b -聚（δ癸内酯） - b -maltoheptaose（MH- b -PDL- b -MH）作为用于纳米结构形成一个过境点可持续的替代，其中两个构成块可以衍生自可再生生物质资源，例如δ-癸内酯和直链淀粉。定义明确的MH- b -PDL- b通过控制/活性开环聚合和点击反应的组合，合成了具有不同PDL长度的-MHs。将制备的MH- b -PDL- b -MHs成功自组装成高度有序的六角柱形结构与域间距的在体和薄膜状态两者~12-14纳米。有趣的是，MH- b -PDL- b的铸态薄膜-MH（PDL长度分别为9K和13K）形成水平圆柱体，并进行热退火（180°C，30分钟），导致磁畴方向从水平方向到垂直方向发生剧烈变化。因此，本文呈现的结果证明了寡糖和生物质衍生的疏水性聚合物的组合对于纳米技术和相关领域的可持续发展似乎是有希望的。