Synthesis and lyotropic liquid crystalline behavior of a cross-linkable zwitterionic amphiphile

Han-yu WU; Xun-da FENG

doi:10.37188/CJLCD.2021-0062

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Synthesis and lyotropic liquid crystalline behavior of a cross-linkable zwitterionic amphiphile

Material Physics | 更新时间：2021-08-05

- Synthesis and lyotropic liquid crystalline behavior of a cross-linkable zwitterionic amphiphile
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 8, Pages: 1069-1074(2021)
- 作者机构：
  
  1.东华大学材料科学与工程学院纤维材料改性国家重点实验室, 上海 201620
  2.东华大学先进低维材料中心, 上海 201620
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(22075041)
- DOI：10.37188/CJLCD.2021-0062
  CLC： O753.2
- Received：08 March 2021，
  
  Revised：22 March 2021，
  
  Published：2021-08
- 稿件说明：
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Han-yu WU, Xun-da FENG. Synthesis and lyotropic liquid crystalline behavior of a cross-linkable zwitterionic amphiphile[J]. Chinese journal of liquid crystals and displays, 2021, 36(8): 1069-1074.
DOI：

Han-yu WU, Xun-da FENG. Synthesis and lyotropic liquid crystalline behavior of a cross-linkable zwitterionic amphiphile[J]. Chinese journal of liquid crystals and displays, 2021, 36(8): 1069-1074. DOI： 10.37188/CJLCD.2021-0062.

摘要

本文报道了一种可交联型的两性双亲分子的设计及合成路线，并进一步探究了其溶致液晶相态。以1，10-二溴代癸烷、丙二酸二乙酯为原料，在液晶分子烷基链末端引入两个可聚合甲基丙烯酸酯基官能团，再通过与1，3-丙烷磺酸内酯的季铵化反应合成了可聚合型两性离子液晶基元。通过核磁共振波谱（NMR）确定合成目标产物的化学结构。运用偏光显微镜（POM）表征并分析了该分子在水中的溶致液晶相行为。根据临界堆积参数（Critical Packing Parameter）推测，该分子临界堆积参数CPP介于1/2~1之间，与水共混自组装易于形成层状相。

Abstract

A cross-linkable zwitterionic amphiphile was designed and synthesized

which can self-assemble into lyotropic liquid crystals for the fabrication of ordered polymeric nanostructure. Bifunctional polymerizable methacrylate groups were introduced into the amphiphilic molecule to afford structural crosslinking by radical polymerization

which can be realized by the use of 1

10-dibromodecane and diethyl malonate as starting materials in the synthesis. Then the quaternization with 1

3-propanesultone yielded the final zwitterionic product that was confirmed by nuclear magnetic resonance spectroscopy (NMR). Lyotropic liquid crystals of the molecule in water were prepared and characterized by polarizing optical microscopy (POM). Hydration of the amphiphile can form only lamellar mesophases. According to the critical packing parameter (CPP) theory

the molecular CPP of this amphiphile is between 1/2 and 1 that preferred the formation of lamellar mesophases.

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Keywords

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