Effect of Amine Surface Density on CO2 Adsorption Behaviors of Amine-Functionalized Polystyrene
- Authors
- Jo, Doug Hyun; Lee, Chang Hun; Jung, Hyunchul; Jeon, Sunbin; Kim, Sung Hyun
- Issue Date
- 15-9월-2015
- Publisher
- CHEMICAL SOC JAPAN
- Citation
- BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, v.88, no.9, pp.1317 - 1322
- Indexed
- SCIE
SCOPUS
- Journal Title
- BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
- Volume
- 88
- Number
- 9
- Start Page
- 1317
- End Page
- 1322
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/92476
- DOI
- 10.1246/bcsj.20150123
- ISSN
- 0009-2673
- Abstract
- Ethylenediamine was grafted onto a polystyrene surface to study the relationship between amine density and amine efficiency. Amine-tethered polystyrene was synthesized in two steps: (1) chloromethylation and (2) amination. The products were characterized by argentometry, N-2 physisorption, thermogravimetric analysis, X-ray diffraction, and FT-IR spectroscopy. The amine efficiency declined drastically when the amine density was less than 1 amine molecule per nm(2), because formation of ammonium carbamate is difficult under such conditions. A double-functionalization method was introduced to improve the CO2 uptake and amine efficiency of the amine-grafted sorbent by impregnating more amino groups into the porous structure. The combination of grafted and mobile amino groups led to a synergic effect, resulting in a CO2 uptake of up to 20.2 wt % at 30 degrees C and 1 bar CO2. It was concluded that double-functionalization with tetraethylenepentamine was advantageous for enhancing the amine efficiency, whereas double-functionalization with polyethyleneimine was advantageous for enhancing the cyclic stability of the sorbent.
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