arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2307.06136cond-mat.softcond-mat.mes-hallnlin.PS
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弹性微相分离理论

Theory of Elastic Microphase Separation

Yicheng Qiang, Chengjie Luo, David Zwicker

AI总结:

该研究针对弹性凝胶中弹性微相分离的实验观测现象,提出结合弹性组分连续场与非局部弹性理论的模型,解析得出图案周期的决定因素,揭示相分离机制并为相关体系工程设计提供理论支撑。

摘要:

弹性微相分离指的是弹性凝胶中通过相分离形成的平衡图案。近期实验揭示了从均相到规则图案相的连续相变,且体系刚度越大,该图案的周期越小。我们在此提出一个可解释这些观测结果的模型。该模型将用于描述相分离的弹性组分连续场,与用于捕捉凝胶微观结构的非局部弹性理论相结合。解析近似表明,图案周期由弹-毛细长度与凝胶微观长度尺度的几何平均值决定。我们的理论凸显了软物质体系中非局部弹性的重要性,揭示了弹性微相分离的机制,将助力这类体系的工程设计。

英文摘要:

Elastic microphase separation refers to equilibrium patterns that form by phase separation in elastic gels. Recent experiments revealed a continuous phase transition from the homogeneous phase to a regularly patterned phase, whose period decreased for stiffer systems. We here propose a model that captures these observations. The model combines a continuous field of the elastic component to describe phase separation with nonlocal elasticity theory to capture the gel's microstructure. Analytical approximations unveil that the pattern period is determined by the geometric mean between the elasto-capillary length and a microscopic length scale of the gel. Our theory highlights the importance of nonlocal elasticity in soft matter systems, reveals the mechanism of elastic microphase separation, and will improve the engineering of such systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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