Molecular Design of an Interfacially Active POSS-Bottlebrush Block Copolymer for the Fabrication of Three-Dimensional Porous Films with Unimodal Pore Size Distributions through the Breath-Figure Self-Assembly,Macromolecules

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Molecular Design of an Interfacially Active POSS-Bottlebrush Block Copolymer for the Fabrication of Three-Dimensional Porous Films with Unimodal Pore Size Distributions through the Breath-Figure Self-Assembly
Macromolecules ( IF 5.1 ) Pub Date : 2019-03-01 00:00:00 , DOI: 10.1021/acs.macromol.9b00089
Chang-Geun Chae ₁ , Yong-Guen Yu ₁ , Ho-Bin Seo ₁ , Myung-Jin Kim ₁ , Y. L. N. Kishore Mallela ₁ , Jae-Suk Lee ₁

Affiliation

We compared the interfacial activity of two classes of POSS-bottlebrush block copolymers (POSSBBCPs) in the breath-figure (BF) self-assembly. Poly[3-(5-norbornene-exo-2,3-dicarboximido)propyl-heptaisobutyl POSS]-block-poly(exo-5-norbornene-2-carbonylate-graft-benzyl methacrylate) (P1-b-P(NB-g-BzMA)) and poly[3-(2-(5-norbornene-exo-2,3-dicarboximido)ethylamino)propyl-heptaisobutyl POSS]-block-poly(exo-5-norbornene-2-carbonylate-graft-benzyl methacrylate) (P2-b-P(NB-g-BzMA)), which contain nonfunctionalized and secondary-amino-functionalized POSS-based blocks, respectively, were prepared by sequential ring-opening metathesis polymerization of norbornenyl monomers (P1-b-P(NB-g-BzMA) with f_P1 = 50 wt % (1–50): M_n = 213 kDa, Đ = 1.12; P2-b-P(NB-g-BzMA)s with f_P2 = 5/11/20/50 wt % (2–5/11/20/50): M_n = 2464/1043/581/268 kDa, Đ = 1.46/1.26/1.24/1.20). Of 1–50 and 2–50, only 2–50 afforded the three-dimensional porous films with unimodal pore size distributions. At high wet thickness, the efficient encapsulation of water droplets through the adsorption of water by the secondary amino groups allowed the 2–50 chains to stabilize the solvent–water interfaces, thus preventing the formation of giant pores. The interfacial activity of P2-b-P(NB-g-BzMA) was enhanced by increasing the weight fraction of the P2 block from 5 to 50 wt %.

中文翻译：

界面活性POSS瓶嵌段共聚物的分子设计，用于通过呼吸图自组装制造具有单峰孔径分布的三维多孔膜。

我们在呼吸图（BF）自组装中比较了两类POSS-牙刷嵌段共聚物（POSSBBCPs）的界面活性。聚[3-（5-降冰片烯-外-2,3-二羧酰）丙基- heptaisobutyl POSS] -嵌段-聚（外型-5-降冰片烯-2- carbonylate-接枝-苄基甲基丙烯酸酯）（P1- b -P（NB -克-BzMA） ）和聚[3-（2-（5-降冰片烯-外-2,3-二羧酰）乙基氨基）丙基- heptaisobutyl POSS] -嵌段-聚（外型-5-降冰片烯-2- carbonylate-接枝-甲基丙烯酸苄酯）（P2- b -P（NB- g -BzMA））分别通过降冰片烯基单体（P1- b- P（NB- g- BzMA），f _P1 = 50 wt％的顺序开环复分解聚合）制备分别包含未官能化和仲氨基官能化的基于POSS的嵌段的）（1 - 50）：中号_ñ = 213 kDa的，Đ = 1.12; P2- b -P（NB-克-BzMA） s的˚F _P2 = 5/11/20/50重量％（2-5 /二十〇分之一十一/ 50）：中号_ñ = 2464/1043/581/268 kDa的，Đ = 1.46 / 1.26 / 1.24 / 1.20）。的1– 50和2 – 50，只有2 – 50提供了具有单峰孔径分布的三维多孔膜。在高的湿厚度，通过对水的吸附通过仲氨基的水滴的有效封装允许的2 - 50链来稳定溶剂-水界面，从而防止巨孔的形成。的界面活性P2- b -P（NB-克-BzMA）通过增加的重量分数增强P2为5〜50重量％的块。

更新日期：2019-03-01

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