Full Paper

Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO2 Adsorbents

  1. Jeffrey H. Drese1,
  2. Sunho Choi1,
  3. Ryan P. Lively1,
  4. William J. Koros1,
  5. Daniel J. Fauth2,
  6. McMahan L. Gray2,
  7. Christopher W. Jones1,*

Article first published online: 9 NOV 2009

DOI: 10.1002/adfm.200901461

Issue

Advanced Functional Materials

Advanced Functional Materials

Volume 19, Issue 23, pages 3821–3832, December 9, 2009

Additional Information

How to Cite

Drese, J. H., Choi, S., Lively, R. P., Koros, W. J., Fauth, D. J., Gray, M. L. and Jones, C. W. (2009), Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO2 Adsorbents. Adv. Funct. Mater., 19: 3821–3832. doi: 10.1002/adfm.200901461

Author Information

  1. 1

    School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive, Atlanta, GA 30332 (USA)

  2. 2

    U.S. Department of Energy National Energy Technology Laboratory 626 Cochrans Mill Road, Pittsburgh, PA 15236 (USA)

*School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive, Atlanta, GA 30332 (USA).

Publication History

  1. Issue published online: 3 DEC 2009
  2. Article first published online: 9 NOV 2009
  3. Manuscript Received: 4 AUG 2009

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article with Supporting Information (HTML) Get PDF (309K)

Keywords:

  • Hybrid materials;
  • Mesoporous silica;
  • Adsorbents;
  • Polymeric materials;
  • Structure–property relationships;
  • Surface modification

Abstract

Hyperbranched aminosilica (HAS) adsorbents are prepared via the ring-opening polymerization of aziridine in the presence of mesoporous silica SBA-15 support. The aminopolymers are covalently bound to the silica support and capture CO2 reversibly in a temperature swing process. Here, a range of HAS materials are prepared with different organic loadings. The effects of organic loading on the structural properties and CO2 adsorption properties of the resultant hybrid materials are examined. The residual porosity in the HAS adsorbents after organic loading, as well as the molecular weights and degrees of branching for the separated aminopolymers, are determined to draw a relationship between adsorbent structure and performance. Humid adsorption working capacities and apparent adsorption kinetics are determined from experiments in a packed-bed flow system monitored by mass spectrometry. Dry adsorption isotherms are presented for one HAS adsorbent with a high amine loading at 35 and 75 °C. These combined results establish the relationships between adsorbent synthesis, structure, and CO2 adsorption properties of the family of HAS materials.

View Full Article with Supporting Information (HTML) Get PDF (309K)