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沿螺旋轴方向的外场作用下螺旋胆甾醇型凝胶的体积相变

Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis.

作者信息

Matsuyama Akihiko

机构信息

Department of Physics and Information Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Kawazu 680-4, Iizuka, Fukuoka 820-8502, Japan.

出版信息

Gels. 2020 Nov 16;6(4):40. doi: 10.3390/gels6040040.

DOI:10.3390/gels6040040
PMID:33207705
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7709648/
Abstract

We present a mean field theory to describe cholesteric elastomers and gels under an external field, such as an electric or a magnetic field, along the helix axis of a cholesteric phase. We study the deformations and volume phase transitions of cholesteric gels as a function of the external field and temperature. Our theory predicts the phase transitions between isotropic (), nematic (), and heliconical cholesteric (ChH) phases and the deformations of the elastomers at these phase transition temperatures. We also find volume phase transitions at the I-ChH and the N-ChH phase transitions.

摘要

我们提出一种平均场理论，用于描述向列型弹性体和凝胶在外部场（如电场或磁场）作用下，沿胆甾相螺旋轴方向的情况。我们研究了胆甾型凝胶的形变和体积相变与外部场及温度的函数关系。我们的理论预测了各向同性相（I）、向列相（N）和螺旋胆甾相（ChH）之间的相变，以及在这些相变温度下弹性体的形变。我们还发现在I - ChH和N - ChH相变处存在体积相变。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/c52507201f05/gels-06-00040-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/3208a5fe1251/gels-06-00040-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/3045271ebae3/gels-06-00040-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/d1856288e03a/gels-06-00040-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/2572475ead73/gels-06-00040-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/7eb056dfee3a/gels-06-00040-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/fe82dc7cf167/gels-06-00040-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/0a6cc223f7f7/gels-06-00040-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/2cbf17e65235/gels-06-00040-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/ddddb6f99b78/gels-06-00040-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/c52507201f05/gels-06-00040-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/3208a5fe1251/gels-06-00040-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/3045271ebae3/gels-06-00040-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/d1856288e03a/gels-06-00040-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/2572475ead73/gels-06-00040-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/7eb056dfee3a/gels-06-00040-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/fe82dc7cf167/gels-06-00040-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/0a6cc223f7f7/gels-06-00040-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/2cbf17e65235/gels-06-00040-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/ddddb6f99b78/gels-06-00040-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cddf/7709648/c52507201f05/gels-06-00040-g010.jpg

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引用本文的文献

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Volume phase transitions of cholesteric liquid crystalline gels.胆甾相液晶凝胶的体积相变
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Theory of polymer-dispersed cholesteric liquid crystals.聚合物分散胆甾型液晶理论。
J Chem Phys. 2013 Nov 7;139(17):174906. doi: 10.1063/1.4828940.
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Volume phase transitions of biaxial nematic elastomers.双轴向列型弹性体的体积相变
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