Preparation and properties of polychromatic liquid crystal microcapsules

Cong SUN

doi:10.3788/YJYXS20193407.0682

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Preparation and properties of polychromatic liquid crystal microcapsules

Materials and Devices | 更新时间：2020-07-05

- Preparation and properties of polychromatic liquid crystal microcapsules
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 7, Pages: 682-689(2019)
- 作者机构：
  
  东北石油大学秦皇岛校区石化系, 河北秦皇岛 066004
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20193407.0682
  CLC： O753.2
- Received：21 February 2019，
  
  Accepted：02 May 2019，
  
  Published：05 July 2019
- 稿件说明：
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Cong SUN. Preparation and properties of polychromatic liquid crystal microcapsules[J]. Chinese journal of liquid crystals and displays, 2019, 34(7): 682-689.
DOI：

Cong SUN. Preparation and properties of polychromatic liquid crystal microcapsules[J]. Chinese journal of liquid crystals and displays, 2019, 34(7): 682-689. DOI： 10.3788/YJYXS20193407.0682.

摘要

采用手性剂掺杂向列相混合液晶制备出具备类似胆甾相液晶温变显色性能的液晶混合物。通过控制向列相液晶中手性剂的添加量，调节混合液晶的颜色，制备出系列室温下呈颜色转变的液晶混合物。在此基础上，探究3种不同添加剂对混合液晶显色性能的影响，确定具备最佳温变显色性能的液晶混合物配方。以上述液晶混合物为芯材、异佛尔酮二异氰酸酯（IPDI）为壁材，采用界面聚合法在不同反应条件下制备出一系列液晶微胶囊，并确定最佳反应条件。结果表明：最佳反应条件下，制备的液晶微胶囊粒径范围在50~105

m之间，平均粒径在68.06

m左右，囊芯材料含量约占35%。液晶微胶囊呈规则球形，粒径比较均匀，具有良好的温变显色性能，且热稳定性较高，热分解温度达330℃以上。

Abstract

Nematic phase liquid crystal mixture with chiral dopant was synthesized to replace cholesteric liquid crystal as the core of microcapsule. Firstly

series of liquid crystal mixture color-changed at room temperature were prepared by adjusting the different ratios of nematic liquid crystal and chiral additive. Afterwards

three extra additives were explored respectively as the addition of the polychromatic liquid crystal mixture to determine the best formulation of liquid crystal mixture displaying different color at varied temperature. A series of liquid crystal microcapsule were conducted and refined by isophorone diisocyanate (IPDI) filled with the above liquid crystal mixture (

i.e

. the core of microcapsule) in terms of interfacial polymerization reaction. It can be concluded from the characterization that the best liquid crystal microcapsules size range between 50-105

m with average particle size of 68.06

m and the contents of core materials is about 35%. The microcapsules exhibit spherical with uniform particle size and good temperature change color performance simultaneously. In addition

thermal decomposition temperature of 330℃ confirms the better thermal stability of liquid crystal microcapsules in this work.

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references

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