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Synthesis Method for Cellulose Nanofiber Biotemplated Palladium Composite Aerogels
Published on: May 9, 2019
Effects of amine loading on the properties of cellulose nanofibrils aerogel and its CO2 capturing performance
Yu Wu1, Yang Zhang2, Nanqing Chen3
1College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China; Center for Renewable Carbon, University of Tennessee, Knoxville, TN, 37996, USA.
Abstract:
In this work, cellulose nanofibrils (CNFs) were used to develop novel amine-based aerogels that can be applied as adsorbents for CO2. Elemental analysis indicated that there was an increase in the C and N content when the concentration of aminosilane was higher. Moreover, Fourier transform infrared spectroscopy confirmed that the aminosilane had been grafted on the CNF. Thermal analysis and X-ray diffraction revealed that the thermal stability of the aerogel decreased after the modification, and the crystallinity decreased. However, the higher amine loading led to a rougher CNF surface and a larger average pore size, which favored the CO2 capture. Furthermore, CNF grafted with aminosilane displayed a high CO2 adsorption capacity (1.91 mmol/g 25 °C, 1 bar) and an easy regeneration process by heating at 80 °C. Therefore, the prepared polymer aerogels might have a highly potential use in the capture of CO2.
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