Effect of Amine Surface Density on CO₂ Adsorption Behaviors of Amine-Functionalized Polystyrene
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Abstract
<jats:title>Abstract</jats:title> <jats:p>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, N2 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 nm2, 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 °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.</jats:p>
Journal
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 88 (9), 1317-1322, 2015-09
Tokyo : Chemical Society of Japan
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Details 詳細情報について
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- CRID
- 1520010380648160000
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- NII Article ID
- 130005099081
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- NII Book ID
- AA00580132
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- ISSN
- 00092673
- 13480634
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- NDL BIB ID
- 026736166
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- Text Lang
- en
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- NDL Source Classification
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- ZP1(科学技術--化学・化学工業)
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- Data Source
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- NDL
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- CiNii Articles