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Development of highly functional membranes through structural control of crystalline/amorphous phases
Polymer Journal ( IF 2.3 ) Pub Date : 2018-10-12 , DOI: 10.1038/s41428-018-0123-x
Hiroki Uehara

AbstractMolecular entanglements have been thought to restrict a desirable chain orientation during drawing. Therefore, a reduction in chain entanglements has been a focus for manufacturing high-performance fibers and membranes. In contrast, our melt-drawing technique utilizes molecular entanglements as a strain transmitter, achieving a nanoperiodic arrangement in which the crystalline and amorphous phases are interconnected. This periodic structure is similar to microphase separation in block copolymers, in which linked points are located at the boundaries between chemically different phases. The results show highly functional membranes can be successfully prepared from highly entangled homopolymer, as well as block copolymer, using solvent-free procedures.Molecular entanglements (left) divide the crystalline and amorphous phases and are similar to the linked points that cause microphase separation in block copolymer (right). Our melt-drawing technique results in periodic arrangement of these phases and replaces the conventional paradigm of “entanglement exclusion for high performance” with the novel “entanglement utilization for high functionality”. In this review, our recent developments for nanostructured membranes using block copolymers and homopolymers are compared and reviewed based on their structural similarities.

中文翻译:

通过结晶/非晶相的结构控制开发高功能膜

摘要 分子缠结被认为在拉伸过程中限制了理想的链取向。因此,减少链缠结一直是制造高性能纤维和膜的重点。相比之下,我们的熔体拉伸技术利用分子缠结作为应变传递器,实现纳米周期排列,其中结晶和非晶相相互连接。这种周期性结构类似于嵌段共聚物中的微相分离,其中连接点位于不同化学相之间的边界处。结果表明,使用无溶剂程序,可以从高度缠结的均聚物和嵌段共聚物成功制备高功能膜。分子缠结(左)将结晶相和非晶相分开,类似于导致嵌段共聚物中微相分离的连接点(右)。我们的熔体拉伸技术导致这些相的周期性排列,并用新颖的“高功能性纠缠利用”取代了“高性能纠缠排除”的传统范式。在这篇综述中,我们根据它们的结构相似性对我们使用嵌段共聚物和均聚物的纳米结构膜的最新进展进行了比较和回顾。我们的熔体拉伸技术导致这些相的周期性排列,并用新颖的“高功能性纠缠利用”取代了“高性能纠缠排除”的传统范式。 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 在这篇综述中,我们根据它们的结构相似性对我们使用嵌段共聚物和均聚物的纳米结构膜的最新进展进行了比较和回顾。我们的熔体拉伸技术导致这些相的周期性排列,并用新颖的“高功能性纠缠利用”取代了“高性能纠缠排除”的传统范式。 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 在这篇综述中,我们根据它们的结构相似性对我们使用嵌段共聚物和均聚物的纳米结构膜的最新进展进行了比较和回顾。
更新日期:2018-10-12
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