Solvent-Induced Self-Assembly Strategy to Synthesize Well-Defined Hierarchically Porous Polymers

Tu Nan Gao, Tao Wang, Wei Wu, Yali Liu, Qisheng Huo, Zhen An Qiao, Sheng Dai

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

Porous polymers with well-orchestrated nanomorphologies are useful in many fields, but high surface area, hierarchical structure, and ordered pores are difficult to be satisfied in one polymer simultaneously. Herein, a solvent-induced self-assembly strategy to synthesize hierarchical porous polymers with tunable morphology, mesoporous structure, and microporous pore wall is reported. The poly(ethylene oxide)-b-polystyrene (PEO-b-PS) diblock copolymer micelles are cross-linked via Friedel–Crafts reaction, which is a new way to anchor micelles into porous polymers with well-defined structure. Varying the polarity of the solvent has a dramatic effect upon the oleophobic/oleophylic interaction, and the self-assembly structure of PEO-b-PS can be tailored from aggregated nanoparticles to hollow spheres even mesoporous bulk. A morphological phase diagram is accomplished to systematically evaluate the influence of the composition of PEO-b-PS and the mixed solvent component on the pore structure and morphology of products. The hypercrosslinked hollow polymer spheres provide a confined microenvironment for the in situ reduction of K 2 PdCl 4 to ultrasmall Pd nanoparticles, which exhibit excellent catalytic performance in solvent-free catalytic oxidation of hydrocarbons and alcohols.

Original languageEnglish
Article number1806254
JournalAdvanced Materials
Volume31
Issue number11
DOIs
StatePublished - Mar 15 2019

Funding

T.N.G. and T.W. have contributed equally to this work. This work was supported by the Young Thousand Talented Program and the National Natural Science Foundation of China (21671073, 21621001, and 21671074), the “111” Project of the Ministry of Education of China (B17020), and Program for JLU Science and Technology Innovative Research Team. S.D. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division.

Keywords

  • hierarchical porous polymer
  • hypercrosslinked polymer
  • porous material
  • solvent-free catalysis
  • solvent-induced self-assembly

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