Deshmukh Prashant, Gopinadhan Manesh, Choo Youngwoo, Ahn Suk-Kyun, Majewski Pawel W, Yoon Sook Young, Bakajin Olgica, Elimelech Menachem, Osuji Chinedum O, Kasi Rajeswari M
Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States.
Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States.
ACS Macro Lett. 2014 May 20;3(5):462-466. doi: 10.1021/mz500161k. Epub 2014 May 1.
We report on the development of a liquid crystalline block copolymer with brush-type architecture as a platform for creating functional materials by magnetic-field-directed self-assembly. Ring-opening metathesis of -alkyloxy cyanobiphenyl and polylactide (PLA) functionalized norbornene monomers provides efficient polymerization yielding low polydispersity block copolymers. The mesogenic species, spacer length, monomer functionality, brush-chain length, and overall molecular weight were chosen and optimized to produce hexagonally packed cylindrical PLA domains which self-assemble and align parallel to an applied magnetic field. The PLA domains can be selectively removed by hydrolytic degradation resulting in the production of nanoporous films. The polymers described here provide a versatile platform for scalable fabrication of aligned nanoporous materials and other functional materials based on such templates.
我们报道了一种具有刷型结构的液晶嵌段共聚物的开发，该共聚物作为通过磁场定向自组装制备功能材料的平台。对烷氧基氰基联苯和聚丙交酯（PLA）官能化的降冰片烯单体进行开环复分解反应，可实现高效聚合，得到低多分散性的嵌段共聚物。选择并优化了介晶物种、间隔长度、单体官能度、刷链长度和总分子量，以制备六方堆积的圆柱形PLA域，这些域会自组装并与外加磁场平行排列。通过水解降解可选择性地去除PLA域，从而制备出纳米多孔膜。本文所述的聚合物为基于此类模板的取向纳米多孔材料和其他功能材料的可扩展制造提供了一个通用平台。
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