Preparation of CO2-adsorbable amine-functionalized polysilsesquioxanes containing cross-linked structures without using surfactants and strong acid or base catalysts

  • Yusaku Sainohira
  • Koki Fujino
  • Atsushi Shimojima
  • Kazuyuki Kuroda
  • Yoshiro KanekoEmail author
Original Paper: Nano- and macroporous materials (aerogels, xerogels, cryogels, etc.)


In this study, we prepared a series of amine-functionalized polysilsesquioxanes (PSQs) containing cross-linked structures via the hydrolytic condensation of mixtures of amino-group-containing organotrialkoxysilanes and bridged organoalkoxysilanes in water under CO2 gas bubbling, followed by lyophilization and heat treatment at 120 °C for 4 h. Among the resulting materials, the amine-functionalized PSQ (PSQ-Am-CL-0.67) prepared from a mixture of 3-aminopropyltrimethoxysilane and bis[3-(trimethoxysilyl)propyl]amine (molar ratio 1:1) as the starting materials in CO2-gas-bubbling water with a solution concentration of 0.67 mol/L exhibited relatively high CO2 adsorption capacity under dry conditions (2.30 mmol(CO2)/g(material)). Moreover, even after repeating the adsorption and desorption of CO2 10 times, the CO2 adsorption capacity of PSQ-Am-CL-0.67 did not noticeably reduce, indicating that it could be used repeatedly as a CO2 capture material.


  • Amine-functionalized polysilsesquioxanes (PSQs) containing cross-linked structures were prepared.

  • The resulting PSQs exhibited a relatively high CO2 adsorption capacity under dry conditions.

  • The resulting PSQs can be used repeatedly as CO2 capture materials.


Polysilsesquioxane Hydrolytic condensation Carbon dioxide adsorption Porous material 



This work was partly carried out at the Joint Research Center for Environmentally Conscious Technologies in Materials Science (project No. 30003) at ZAIKEN, Waseda University.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10971_2019_5072_MOESM1_ESM.docx (3.5 mb)
Supplementary figures.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Graduate School of Science and EngineeringKagoshima UniversityKagoshimaJapan
  2. 2.Department of Applied Chemistry, Faculty of Science and EngineeringWaseda UniversityShinjuku-kuJapan
  3. 3.Kagami Memorial Research Institute for Materials Science and TechnologyWaseda UniversityShinjuku-kuJapan

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