Effects of amine loading on the properties of cellulose nanofibrils aerogel and its CO2 capturing performance

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO2 adsorption characteristics

“…The spectrum c in Figure 3(a) showed that a new strong band around 1261 cm −1 , assigned to a COSi stretching vibration, 9 and some new bands between 800 and 750 cm −1 , associated with the SiO, or SiC stretching vibrations, 9 appeared. In addition, in a comparison to the spectrum b in Figure 3(a), the spectrum c displayed that the intensity of the band at 2931 cm −1 , ascribable to the CH bond in CH 2 groups, 24 increased after the modification.…”

“…Nanocellulose, one of natural polymer, has been considered a promising candidate for solid support due to its abundance and its renewability 8,9 . Besides, nanocellulose is rich in hydroxyl groups on its surface, used to tether covalently chemical functionalities to the cellulose backbone for some specific tasks.…”

“…In our previous studies, the formed CNC hydrogels were modified using APMDS, followed by the freezing dry or the supercritical CO 2 drying 13,14 . Additionally, the individualized CNF particles were first functionalized in aminosilane solutions, and then the modified CNFs were modeled and freezing‐dried to obtain the aerogel 9 . The results showed that all these amine‐bearing nanocellulose aerogels showed good potential for the capture of CO 2 .…”

Piperazine‐modified activated alumina as a novel promising candidate for CO2 capture: experimental and modeling

“…Modification adsorbents with amine groups are an effective and cheap way to capture CO 2 from flue gas and ambient air . Generally, impregnation and grafting are two important methods for making ready adsorbents by amines …”

“…5,19,[27][28][29][30] Generally, impregnation and grafting are two important methods for making ready adsorbents by amines. [31][32][33][34][35][36] In the impregnation procedure, there are no chemical interactions between the amine and the solid adsorbent and the amine is physically loaded on the surface of solid adsorbent, whereas in grafting, covalent chemical bonding occurs between the amine and the solid adsorbent. Due to easy and simple preparation, low corrosion, and high amine capacity, the impregnation procedure is more effective and interesting.…”