A Dendronized Cellulose Derivative and its Thermotropic Liquid Crystal and Lyotropic Cholesteric Liquid Crystal Behaviors
A novel dendronized cellulose，ethyl cellulose grafted 3,4,5-tris[4-(dodecyloxy) benzyloxy] benzoate (EC-g-DOBOB), which is comprised of ethyl cellulose (EC) backbone with mesogenic moiety DOBOB (3,4,5-tris(4-(dodecyloxy)benzyloxy)benzoic acid) dendron grafted, was designed and synthesized. The structure of EC-g-DOBOB was investigated by means of FTIR, Both thermotropic liquid crystal and lyotropic liquid crystal behaviors of EC-g-DOBOB were studied by combination of DSC, POM and XRD. At room temperature EC-g-DOBOB demonstrated hexagonal columnar mesophase (Φh), with the column diameter 5.8 nm, besides it formed lyotropic cholesteric liquid crystal in concentrated chloroform solution with a planar texture.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Y. M. Dong et al., "A Dendronized Cellulose Derivative and its Thermotropic Liquid Crystal and Lyotropic Cholesteric Liquid Crystal Behaviors", Advanced Materials Research, Vols. 239-242, pp. 2620-2623, 2011