Synthesis of Poly(ionic Liquid)s- block-poly(methyl Methacrylate) Copolymer-Grafted Silica Particle Brushes with Enhanced CO2Permeability and Mechanical Performance

Zongyu Wang, Yangyang Wang, Jihua Chen, Mark Arnould, Ilja Popovs, Shannon M. Mahurin, Hao Chen, Tao Wang, Sheng Dai

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Poly(ionic liquid) (PIL)-based block copolymers are of particular interest as they combine the specific properties of PILs with the self-assembling behaviors of block copolymers, broadening the range of potential applications for PIL-based materials. In this work, three particle brushes: SiO2-g-poly(methyl methacrylate) (PMMA), SiO2-g-PIL, and SiO2-g-PMMA-b-PIL were prepared through surface-initiated atom transfer radical polymerization. Unlike the homogeneous homopolymer particle brushes, the block copolymer particle brush SiO2-g-PMMA-b-PIL exhibited a bimodal chain architecture and unique phase-separated morphology, which were confirmed by size-exclusion chromatography and transmission electron microscopy. In addition, the influence of the introduction of the PMMA segment on the gas separation and mechanical performance of the PIL-containing block copolymer particle brushes were investigated. A significant improvement of Young's modulus was observed in the SiO2-g-PMMA-b-PIL compared to the SiO2-g-PIL bulk films; meanwhile, their gas separation performances (CO2 permeability and CO2/N2 selectivity) were the same, which demonstrates the possibility of improving the mechanical properties of PIL-based particle brushes without compromising their gas separation performance.

Original languageEnglish
Pages (from-to)10875-10881
Number of pages7
JournalLangmuir
Volume37
Issue number36
DOIs
StatePublished - Sep 14 2021

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. Part of this work was conducted at the Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility.

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