Formation of Liquid-condensed mineral phases and the mechanisms of the PILP process: potential for a new morphosynthetic route to nanocomposite materials

液体凝聚矿物相的形成和 PILP 过程的机制：纳米复合材料新形态合成途径的潜力

• 批准号: 251939425
• 负责人: Privatdozent Dr. Stephan E. Wolf
• 金额: --
• 依托单位: Department of Earth and Planetary Sciences
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/251939425?language=en
• 关键词: Formation; Liquid; condensed; mineral; phases

This Emmy Noether project is dedicated to the elucidation of the physicochemical mechanisms of the polymer-induced liquid-precursor (PILP) process in particular and the formation of liquid-condensed mineral precursors in general. The PILP process is a bio-inspired synthesis route which allows for the production of mesocrystalline and nanogranular materials at mildest conditions. The genesis of a solid-state material via PILP follows a so-called nonclassical crystallization route which proceeds by accretion of nanodroplets of a liquid-condensed mineral precursor phase. Up to now, the origin of these alleged liquid-liquid phase separation (LLPS) processes was unclear, limiting translation and exploitation of the morphosynthesis potential of PILP processes. We can now demonstrate that LLPS is feasible for a range of inorganic ionic systems: LLPS of inorganic components can occur when sufficiently stable coordination complexes/clusters are formed which then represent a distinct solute species. These clusters act independently from single ions in solution and are the actual demixing species. With this fundamental insight, we can now provide a mechanistical framework of PILP/LLPS processes which rests on established theories. Our results demonstrate that spinodal demixing of inorganic salts is readily achievable for a range of ionic compounds; controlled arrestment of the spinodal demixing gives unparalleled access to a range of morphologies from self-supporting nanoporous networks to nanodroplets castable on substrates. In this continuation, we aim at evolving spinodal decomposition into a morphosynthetic tool which allows for tailored bicontinuous networks of inorganic components with adjustable pore size and curvature. We will further look into the impact inorganic ions have as additives in spinodal decomposition; a special regard will be laid on magnesium which is of central importance for biomineralisation processes.

这个Emmy Noether项目致力于阐明聚合物诱导的液体前体（PILP）过程的物理化学机制，特别是液体凝聚矿物前体的形成。PILP工艺是一种生物启发的合成路线，允许在最温和的条件下生产介晶和纳米颗粒材料。 经由PILP的固态材料的成因遵循所谓的非经典结晶路线，该路线通过液体凝聚矿物前体相的纳米液滴的增积来进行。到目前为止，这些所谓的液-液相分离（LLPS）过程的起源尚不清楚，限制了PILP过程的形态合成潜力的转化和开发。 我们现在可以证明LLPS对于一系列无机离子系统是可行的：当形成足够稳定的配位络合物/簇，然后代表不同的溶质物种时，可以发生无机组分的LLPS。这些团簇独立于溶液中的单个离子起作用，并且是实际的分层物质。有了这个基本的见解，我们现在可以提供一个机制框架的PILP/LLPS过程，依赖于建立的理论。我们的研究结果表明，无机盐的spinodal分层是很容易实现的一系列离子化合物的spinodal分层的控制administration提供了无与伦比的访问范围内的形态，从自支撑的纳米多孔网络的nanodroplets基板上可浇铸。 在这个延续中，我们的目标是发展到一个形态合成的工具，允许定制的双连续网络的无机成分可调孔径和曲率的spinodal分解。我们将进一步研究无机离子作为添加剂在亚稳分解中的影响;特别关注对生物矿化过程至关重要的镁。