Mixtures of solvents and mixtures of block copolymers as tools for tunable structures in block copolymer thin films

溶剂混合物和嵌段共聚物混合物作为嵌段共聚物薄膜中可调结构的工具

• 批准号: 181436160
• 负责人: Professorin Dr. Christine M. Papadakis
• 金额: --
• 依托单位: DWI - Leibniz-Institut für Interaktive Materialien e.V.
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/181436160?language=en
• 关键词: Mixtures; solvents; mixtures; block; copolymers

The continuation project aims at (i) understanding the processes in diblock copolymer thin films during vapor treatment with solvent mixtures and (ii) at using micro- and macrophase separation in thin films of mixtures of diblock copolymers to prepare complex structures. In project part (i), thin films from cylinder-forming diblock copolymers will be vapor treated with mixtures of selective and non-selective solvents. This will lead to an understanding of the restructuring processes; thus, optimum protocols to anneal defects and to induce the desired cylinder orientations by solvent vapor annealing will be identified. In project part (ii), thin films from binary mixtures of symmetric diblock copolymers will be investigated which form complex structures due to the interplay of micro- and macrophase separation. In mixtures of symmetric and asymmetric diblock copolymers, we will investigate the transition from the lamellar to the cylindrical morphology including possible interphases and epitaxial growth as well as the role of the film interfaces. Solvent vapor treatment will bring the samples into equilibrium. The poly(styrene-b-dimethylsiloxane) system will be chosen for all investigations because it is stable, has a high interaction parameter and because a number of solvents having different selectivity exist. In-situ, real-time grazing-incidence small-angle X-ray scattering will be combined with in-situ white-light interferometry and ex-situ atomic force microscopy and X-ray reflectometry. Selected samples will be investigated using time-of-flight neutron reflectivity to highlight the solvent distribution in the swollen films. The experimental studies will be supported by theoretical calculations and computer simulations by the Russian project partner. This way, we aim at furthering our understanding of structure formation in these multicomponent systems. The project is realized in the framework of the Memorandum of Understanding of the RFBR and DFG.

继续项目的目的是（i）理解在溶剂混合物的蒸气处理过程中二嵌段共聚物薄膜的过程，以及（ii）在二嵌段共聚物混合物的薄膜中使用微观和宏观相分离来制备复杂的结构。在项目部分（i）中，将用选择性和非选择性溶剂的混合物对由圆柱形二嵌段共聚物制成的薄膜进行蒸汽处理。这将导致对重组过程的理解;因此，将确定退火缺陷和通过溶剂蒸气退火诱导所需圆柱体取向的最佳方案。在项目部分（ii）中，将研究对称二嵌段共聚物的二元混合物的薄膜，由于微观和宏观相分离的相互作用而形成复杂的结构。在对称和不对称的二嵌段共聚物的混合物中，我们将研究从层状到圆柱形形态的过渡，包括可能的界面和外延生长以及膜界面的作用。溶剂蒸气处理将使样品达到平衡。将选择聚（苯乙烯-b-二甲基硅氧烷）体系用于所有研究，因为它稳定，具有高相互作用参数，并且存在许多具有不同选择性的溶剂。原位、实时掠入射小角度X射线散射将与原位白光干涉测量法和非原位原子力显微镜和X射线反射测量法相结合。选定的样品将使用飞行时间中子反射率进行研究，以突出溶胀膜中的溶剂分布。实验研究将得到俄罗斯项目合作伙伴的理论计算和计算机模拟的支持。这样，我们的目标是进一步了解这些多组分系统的结构形成。该项目是在RFBR和DFG谅解备忘录的框架内实现的。

项目成果

In Situ Tracking of Composition and Morphology of a Diblock Copolymer Film with GISAXS during Exchange of Solvent Vapors at Elevated Temperatures

• DOI: 10.1002/adfm.201706226
• 发表时间: 2018-05-09
• 期刊: ADVANCED FUNCTIONAL MATERIALS
• 影响因子: 19
• 作者: Berezkin, Anatoly V.;Jung, Florian;Papadakis, Christine M.
• 通讯作者: Papadakis, Christine M.

Vertical Domain Orientation in Cylinder-Forming Diblock Copolymer Films upon Solvent Vapor Annealing

• DOI: 10.1021/acs.macromol.5b01771
• 发表时间: 2016-01-12
• 期刊: MACROMOLECULES
• 影响因子: 5.5
• 作者: Berezkin, Anatoly V.;Papadakis, Christine M.;Potemkin, Igor I.
• 通讯作者: Potemkin, Igor I.

Restructuring in block copolymer thin films: In situ GISAXS investigations during solvent vapor annealing

• DOI: 10.1016/j.progpolymsci.2016.09.009
• 发表时间: 2017-03
• 期刊: Progress in Polymer Science
• 影响因子: 27.1
• 作者: D. Posselt;Jianqi Zhang;D. Smilgies;A. V. Berezkin;I. Potemkin;C. Papadakis

Vertical vs Lateral Macrophase Separation in Thin Films of Block Copolymer Mixtures: Computer Simulations and GISAXS Experiments.

• DOI: 10.1021/acsami.6b16563
• 发表时间: 2017-03
• 期刊: ACS applied materials & interfaces
• 影响因子: 9.5
• 作者: A. V. Berezkin;Florian A. Jung;D. Posselt;Detlef-Matthias Smilgies;C. Papadakis