Flexibly Stretchable LC Light Scattering Display Based on POSS-dendrimer Super Strong LC Gel

Tong Xiao-qian; Shan Tian-yu; Ma Meng; Chen Si; Wang Xu

doi:10.11777/j.issn1000-3304.2017.17117

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Flexibly Stretchable LC Light Scattering Display Based on POSS-dendrimer Super Strong LC Gel

Research Article | 更新时间：2021-01-26

- Flexibly Stretchable LC Light Scattering Display Based on POSS-dendrimer Super Strong LC Gel
- Acta Polymerica Sinica Issue 10, Pages: 1652-1661(2017)
- 作者机构：
  
  浙江工业大学材料科学与工程学院杭州 310014
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17117
  CLC：
- Published：20 October 2017，
  
  Received：2 May 2017，
  
  Revised：31 May 2017，
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Tong Xiao-qian, Shan Tian-yu, Ma Meng, Chen Si, Wang Xu. Flexibly Stretchable LC Light Scattering Display Based on POSS-dendrimer Super Strong LC Gel. [J]. Acta Polymerica Sinica (10):1652-1661(2017)
DOI：

Tong Xiao-qian, Shan Tian-yu, Ma Meng, Chen Si, Wang Xu. Flexibly Stretchable LC Light Scattering Display Based on POSS-dendrimer Super Strong LC Gel. [J]. Acta Polymerica Sinica (10):1652-1661(2017) DOI： 10.11777/j.issn1000-3304.2017.17117.

摘要

利用凝胶因子自组装可赋予凝胶网络形状、强度等的特性，设计制备了多面体齐聚倍半硅氧烷（POSS）核有机无机杂化dendrimer（POSS-G1-BOC）凝胶因子并将其引入到液晶客体分子中，获得了兼具力学性能与响应特性的超分子液晶凝胶.在系统研究该液晶凝胶的凝胶行为、响应特性、表面形貌、组装机理及力学性质的基础之上，制备了基于透明柔性可拉伸导电薄膜（PU/AgNWs）的三明治结构液晶光散射显示器件.该器件在低电压（10 V，DC）驱动下即可实现较高对比度的显示效果，不仅可以在弯曲至曲率为0.14 cm

-1

的条件下使用，而且在拉伸至原始长度的120%时，仍可保持自身的电控响应特性，有望将其广泛应用于可穿戴设备、智能响应性材料等领域.

Abstract

POSS core organic-inorganic hybrid dendrimer (POSS-G1-BOC) was successfully designed

synthesized and introduced into LC (liquid crystal) guest molecules (5CB) to prepare supermolecular LC physical gels with strong mechanical strength and new-style stimuli-responsive properties. The highly thermo-stable LC gel could withstand temperature as high as 117 °C with the addition of gelators as low as 0.3%. And it had excellent mechanical properties that could maintain its own independent shape within 17% strain even influenced by an external small force. The recover-ability of the LC gel also showed excellent mechanical properties. The microstructure of the system had obvious spiral status and was quite different from previous loofah-like gel networks. LC guest molecules were more likely to influence the self-assembling process of gelators and they were different from the remarkable effect of common solvents. The appearance of spiral fibers in the system without any chiral molecules might indicate the change of self-assembly mechanism in essential. Based on these systematical studies of the LC gel

including its response characteristics

assembly mechanisms and mechanical properties

it was found that the LC gel had many outstanding properties towards light

electric current

magnetic field and heat

etc

. which could be widely used in the field of display materials

overcoming the natural “flowing and orderly” properties of liquid crystal molecules. As an example of the application of LC gels

sandwiched LC light scattering display device was prepared based on transparent flexible and stretchable conductive films (PU/AgNWs) . The device could realize the high-constrast display effect driven at a low voltage (10 V

DC) and it could be used under the condition of being bent to the curvature as high as 0.14 cm

−1

. Meanwhile

it could still keep its electrically controlled response characteristics as being stretched to 120% of its original length. It might be used in the field of wearable devices

smart responsive materials in the future.

关键词

液晶凝胶多面体齐聚倍半硅氧烷（POSS）树枝状大分子可拉伸光电响应显示

Keywords

Liquid crystal (LC) gelPOSSDendrimerStretchablePhotoelectric responseDisplay

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Center for Bionanoengineering, Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University

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