Construction of Polymer-Stabilized Automatic MultiDomain Vertical Molecular Alignment Layers with Pretilt Angles by Photopolymerizing Dendritic Monomers under Electric Fields,ACS Omega

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Construction of Polymer-Stabilized Automatic MultiDomain Vertical Molecular Alignment Layers with Pretilt Angles by Photopolymerizing Dendritic Monomers under Electric Fields
ACS Omega ( IF 3.7 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1021/acsomega.7b01015
Won-Jin Yoon ₁ , Yu-Jin Choi ₁ , Dong-Gue Kang ₁ , Dae-Yoon Kim ₁ , Minwook Park ₁ , Ji-Hoon Lee ₁ , Shin-Woong Kang ₁ , Seung Hee Lee ₁ , Kwang-Un Jeong ₁

Affiliation

The synthesized itaconic acid-based dendritic amphiphile (Ita3C₁₂) monomers and the methacryl polyhedral oligomeric silsesquioxane (MAPOSS) cross-linkers were directly introduced for the construction of automatic vertical alignment (auto-VA) layers in the host nematic liquid crystal (NLC) medium. The auto-VA layer can be stabilized by irradiating UV light. For the automatic fabrication of a polymer-stabilized multidomain VA (PS auto-MDVA) layer with a pretilt angle, Ita3C₁₂ and MAPOSS were photopolymerized under the electric field by irradiating UV light on the multidomain electrode cell. Mainly because of the pretilted NLC at zero voltage, the electro-optic properties of the PS auto-MDVA cell were dramatically improved. From the morphological observations combined with surface chemical analyses, it was found that various sizes of protrusions on the solid substrates were automatically constructed by the two-step mechanisms. We demonstrated the PS auto-MDVA cell with the enhancement of electro-optic properties as a single-step process and investigated how the protrusions were automatically developed during the polymer stabilization.

中文翻译：

电场下光致树枝状单体的光聚合制备具有预倾角的聚合物稳定的自动多域垂直分子取向层

直接将合成的衣康酸基树枝状两亲（Ita3C ₁₂）单体和甲基丙烯酸多面体低聚倍半硅氧烷（MAPOSS）交联剂引入，以在宿主向列液晶（NLC）中构建自动垂直排列（auto-VA）层中等的。可以通过照射紫外线来稳定自动VA层。为了自动制造具有预倾斜角的聚合物稳定的多域VA（PS auto-MDVA）层，Ita3C ₁₂通过在多畴电极电池上照射紫外线，在电场下使MAPOSS和MAPOSS光聚合。主要是因为预倾斜的NLC在零电压下，PS auto-MDVA电池的电光性能得到了显着改善。从形态学观察与表面化学分析相结合，发现通过两步机制自动在固体基材上形成各种尺寸的突起。我们演示了具有增强的电光特性的PS auto-MDVA电池，它是一个单步过程，并研究了在聚合物稳定过程中突起是如何自动显影的。

更新日期：2017-09-19

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