Aminosilane-grafted spherical cellulose nanocrystal aerogel with high CO2 adsorption capacity
- 51 Downloads
In this study, the cellulose nanocrystals (CNC) obtained by acid hydrolysis of microcrystalline cellulose (MCC) are customized by suspension to obtain a spherical CNC hydrogel. The N-(2-aminoethyl) (3-amino-propyl) methyldimethoxyansile (AEAPMDS) preparation was grafted to spherical CNC hydrogel using a water phase heat treatment. Finally, aerogel samples were obtained by tert-butanol replacement and freeze-drying. The test results confirmed that the aminosilane was grafted on CNC. Electron micrographs and N2 sorption isotherms showed that the pores of the aerogel were partially blocked due to the introduction of AEAPMDS, and the specific surface area was decreased. Due to the presence of chemisorption, the amount of CO2 adsorbed at a pressure of 3 bar by the modified aerogel (2.63 mmol/g) was greatly improved compared with the unmodified aerogel (0.26 mmol/g), and the adsorption results were fit well by the Langmuir model. Thus, our experiments provided the opportunity to develop a new CO2 absorbent material.
KeywordsCellulose nanocrystal Aerogel Graft CO2 adsorption
This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (201504603).
- He Y-L, Xie T (2015) Advances of thermal conductivity models of nanoscale silica aerogel insulation material. Appl Therm Eng 81:28–50. https://doi.org/10.1016/j.applthermaleng.2015.02.013 CrossRefGoogle Scholar
- Jiao Y, Wan C, Qiang T, Li J (2016) Synthesis of superhydrophobic ultralight aerogels from nanofibrillated cellulose isolated from natural reed for high-performance adsorbents. Appl Phys A 122:686Google Scholar
- Kim J, Rubino I, Lee J-Y, Choi H-J (2016) Application of halloysite nanotubes for carbon dioxide capture. Mater Res Express 3. https://doi.org/10.1088/2053-1591/3/4/045019
- Li N, Chen W, Chen G, Wan X, Tian J (2018) Low-cost, sustainable, and environmentally sound cellulose absorbent with high efficiency for collecting methane bubbles from seawater. ACS Sustain Chem Eng 6: 6370–6377Google Scholar
- Long L-Y, Weng Y-X, Wang Y-Z (2018) Cellulose Aerogels: Synthesis, Applications, and Prospects. Polymers (Basel) 10:623. https://doi.org/10.3390/polym10060623
- Perera F (2018) Pollution from fossil-fuel combustion is the leading environmental threat to global pediatric health and equity: solutions exist. Int J Environ Res Public Health 15. https://doi.org/10.3390/ijerph15010016
- Vilarrasa-Garcia E, Ortigosa-Moya EM, Cecilia JA, Cavalcante CL Jr, Jimenez-Jimenez J, Azevedo DCS, Rodriguez-Castellon E (2015) CO2 adsorption on amine modified mesoporous silicas: effect of the progressive disorder of the honeycomb arrangement. Microporous Mesoporous Mater 209:172–183. https://doi.org/10.1016/j.micromeso.2014.08.032 CrossRefGoogle Scholar
- Wan C, Lu Y, Jiao Y, Jin C, Sun Q, Li J (2015) Ultralight and hydrophobic nanofibrillated cellulose aerogels from coconut shell with ultrastrong adsorption properties. J Appl Polym Sci 132:42037Google Scholar
- Wang Z, Han NM, Wu Y, Liu X, Shen X, Zheng Q, Kim JK (2017) Ultrahigh dielectric constant and low loss of highly-aligned graphene aerogel/poly(vinyl alcohol) composites with insulating barriers. Carbon N Y 123:385–394Google Scholar
- Zettlemoyer AC (1958) Colloid and surface Chemistry.Google Scholar