Setting the Stage for Fabrication of Self-Assembled Structures in Compact Geometries: Inside-Out Isoporous Hollow Fiber Membranes,ACS Macro Letters

当前位置： X-MOL 学术 › ACS Macro Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Setting the Stage for Fabrication of Self-Assembled Structures in Compact Geometries: Inside-Out Isoporous Hollow Fiber Membranes
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-06-26 00:00:00 , DOI: 10.1021/acsmacrolett.8b00402
Kirti Sankhala ₁ , Joachim Koll ₁ , Volker Abetz _{1,

2}

Affiliation

Fabrication of evaporation-induced self-assembled structures on easily accessible surfaces is an established strategy, while achieving such microphase-separated structures in compact geometries has been a long-standing goal. The requirement of comparatively less concentrated block copolymer (BCP) solution to pass through the compact geometries significantly reduces the stimulations required for self-assembly. The high polymer relaxation rates and decreased thermodynamic driving forces, as well as high capillary suction of dilute solutions in the porous substrates, complicates the BCP self-assembly and fabrication of the uniform coated layer, respectively. In this study, highly permeable robust poly(ether sulfone) hollow fiber membranes (PES HFM) with an inner diameter of approximately 1 mm are selected as compact geometries, and the isoporous structures are developed on top of ≤10 μm thin coated layer. This fabrication process introduces a technologically favored inside-out configuration for isoporous composite HFM with large bore diameters.

中文翻译：

为紧凑几何形状的自组装结构的制造奠定基础：由内而外的等孔中空纤维膜

在易于接近的表面上制造蒸发诱导的自组装结构是一种既定的策略，而在紧凑的几何形状中实现这种微相分离结构是一个长期的目标。相对较低浓度的嵌段共聚物 (BCP) 溶液通过紧凑几何形状的要求显着降低了自组装所需的刺激。高聚合物弛豫率和降低的热力学驱动力，以及多孔基材中稀溶液的高毛细管吸力，分别使 BCP 自组装和均匀涂层的制造变得复杂。在这项研究中，选择内径约为 1 mm 的高渗透性强聚醚砜中空纤维膜 (PES HFM) 作为紧凑的几何形状，并且等孔结构在≤10μm的薄涂层之上形成。该制造工艺为具有大孔径的等孔复合 HFM 引入了技术上受青睐的由内向外配置。

更新日期：2018-06-26

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11