Phase transitions in lyotropic nematic gels
Phase transitions in lyotropic nematic gels
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溶致向列凝胶中的相变
DOI：
10.1140/epje/i2002-10022-4
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Lubensky
中科院分区：
文献类型：
--
作者：
David Lacoste;A. W. C. Lau;T. Lubensky
在本文中，我们讨论了浸入各向同性溶剂中的溶致向列凝胶的平衡相和塌陷转变。向列凝胶由交联聚合物网络组成，其中嵌入有棒状分子。当降低溶剂的质量时，我们发现溶致向列凝胶会经历不连续的体积变化，并伴随着各向同性向列相转变。我们还提供了这些系统可能展示的相图。特别是，我们证明了两个各向同性相、两个向列相、或各向同性相和向列相的共存可能发生。
In this paper, we discuss the equilibrium phases and collapse transitions of a lyotropic nematic gel immersed in an isotropic solvent. A nematic gel consists of a cross-linked polymer network with rod-like molecules embedded in it. Upon decreasing the quality of the solvent, we find that a lyotropic nematic gel undergoes a discontinuous volume change accompanied by an isotropic-nematic transition. We also present phase diagrams that these systems may exhibit. In particular, we show that coexistence of two isotropic phases, of two nematic phases, or of an isotropic and a nematic phase can occur.