Confined Self-Assembly Enables Stabilization and Patterning of Nanostructures in Liquid-Crystalline Block Copolymers
Confined Self-Assembly Enables Stabilization and Patterning of Nanostructures in Liquid-Crystalline Block Copolymers
复制标题
受限自组装实现液晶嵌段共聚物中纳米结构的稳定和图案化
DOI：
10.1021/acs.macromol.8b02435
复制
发表时间：
2019-02-26
期刊：
影响因子：
5.5
通讯作者：
Yu, Haifeng
中科院分区：
文献类型：
--
作者：
Chen, Yuxuan;Huang, Shuai;Yu, Haifeng
Various pathways have been utilized to manipulate microphase separation (MPS) of block copolymers, but the obtained MPS nanostructures are often suffering from poor thermal stability. Here, confined self-assembly is first adopted to thermally stabilize and conveniently pattern the MPS morphologies of an amphiphilic liquid-crystalline block copolymer (LCBC) composed of hydrophilic poly(ethylene oxide) (PEO) and hydrophobic azobenzene-containing polymethacrylate. The MPS nanostructures are thermally stabilized by top coating a layer of water-soluble polymer, sodium polystyrenesulfonate (PSSNa), as a result of coordination interaction between PEO and PSSNa. Interestingly, both thermal annealing and rubbing-treated polyimide film caused reorientation of mesogens in the PSSNa-coated LCBC film; however, the orientation of PEO nanocylinders remained unchangeable. This indicates that the PEO nanocylinders are selectively anchored by the PSSNa covering layer, regardless of the changes of mesogenic orientation. Thu...
