Design rationale of thermally responsive microgel particle films that reversibly absorb large amounts of CO2: fine tuning the pKa of ammonium ions in the particles

Mengchen Yue, Yu Hoshino, Yoshiko Miura

研究成果: Contribution to journalArticle査読

24 被引用数 (Scopus)

抄録

Herein we revealed the design rationale of thermally responsive gel particle (GP) films that reversibly capture and release large amounts of CO2 over a narrow temperature range (30-75°C). The pKa value of ammonium ions in the GPs at both the CO2 capture temperature (30°C) and release temperature (75°C) is found to be the primary factor responsible for the stoichiometry of reversible CO2 capture by the amines in the GP films. The pKa values can be tuned by the properties of GPs such as volume phase transition temperature (VPTT), size, swelling ratio, and the imprinted microenvironment surrounding the amines. The optimal GP obtained according to the design rationale showed high capture capacity (68 mL CO2 per g dry GPs, 3.0 mmol CO2 per g dry GPs), although the regeneration temperature was as low as 75°C. We anticipate that GP films that reversibly capture other acidic and basic gases in large amounts can also be achieved by the pKa tuning procedures.

本文言語英語
ページ(範囲)6112-6123
ページ数12
ジャーナルChemical Science
6
11
DOI
出版ステータス出版済み - 7 28 2015

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

フィンガープリント 「Design rationale of thermally responsive microgel particle films that reversibly absorb large amounts of CO<sub>2</sub>: fine tuning the pK<sub>a</sub> of ammonium ions in the particles」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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