Title: Light-responsive Actuation Materials Based on the Photodeformable Liquid Crystal Polymers

Author: Jianqiang Zhao, Futao Cheng, Yanlei Yu*

Journal: Proc. SPIE, 2011, 810705.

Abstract:

Two acrylate monomers and two diacrylate crosslinkers containing a long spacer were synthesized and crosslinked liquid-crystalline polymer (CLCP) films with different concentrations of azobenzene were prepared by photopolymerization of the mixtures of the monomers and the crosslinkers. All the monomers, crosslinkers and polymerizable mixtures exhibited LC phases in heating or/and cooling processes. Due to the relatively long spacer, the obtained CLCP films exhibited a glass transition around 30 °C, which allows the CLCP films to undergo photodeformations at room temperature. In addition, when the concentration of azobenzene decreased, the films bent towards the light source with a faster speed and a larger photoinduced mechanical force.

论文链接：https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8107/810705/Light-responsive-actuation-materials-based-on-the-photodeformable-liquid-crystal/10.1117/12.897451.full

PDF下载：Light-responsive Actuation Materials Based on the Photodeformable Liquid Crystal Polymers.pdf

本研究合成了两种丙烯酸酯单体和两种含有长间隔基的丙烯酸酯交联剂，并通过光聚合的方法制备了含有不同浓度偶氮苯的交联液晶聚合物(CLCP)薄膜。所有的单体、交联剂和反应性混合物在加热或/和冷却过程中都表现出液晶相。由于间隔基相对较长，得到的CLCP薄膜在30 ℃左右发生玻璃化转变，这使得CLCP薄膜在室温下即可发生光致形变。此外，当偶氮苯浓度降低时，薄膜向光源弯曲的速度更快，光诱导机械力更大。