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Aminosilane-modified wood sponge for efficient CO2 capture

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Abstract

Wood sponges obtained by structure-retaining delignification of natural wood sheets are promising for CO2 storage. Herein, lignin in balsa wood is selectively removed through chemical treatment, leading to a highly porous structure. To boost the CO2 adsorption capacity, amine agents are grafted on the delignified wood via a condensation reaction. The resulting amine-grafted wood sponges exhibit hierarchical porosity and are mechanically resilient. A relatively high CO2 uptake of 1.22 mmol g−1 (25 °C, 1 bar) is achieved due to the physisorption of hierarchical pores and chemisorption of high amine group loading. Such amine-grafted wood sponges fabricated from top-down strategy hold great potential to serve as renewable CO2 capture materials.

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Acknowledgements

The authors are grateful for financial support from the Natural Science Foundation of Jiangsu Province for Youth scholar (BK20180766), and the China Scholarship Council (202008320018). We also thank Advanced Analysis & Testing Center, Nanjing Forestry University for sample tests.

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Correspondence to Xiong-Fei Zhang or Jianfeng Yao.

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Wang, Z., Zhang, XF., Ding, M. et al. Aminosilane-modified wood sponge for efficient CO2 capture. Wood Sci Technol 56, 691–702 (2022). https://doi.org/10.1007/s00226-022-01371-4

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  • DOI: https://doi.org/10.1007/s00226-022-01371-4

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