Journal
CARBOHYDRATE POLYMERS
Volume 118, Issue -, Pages 115-118Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.11.010
Keywords
Carbon; Aerogels; Pyrolysis; Regenerated cellulose; Porous materials
Categories
Funding
- China Postdoctoral Science Foundation [2013M540263]
- National Natural Science Foundation of China [31270590]
- Doctoral Candidate Innovation Research Support Program of Science & Technology Review [kjdb2012006]
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In this paper, we reported miscellaneous carbon aerogels prepared by pyrolysis of regenerated cellulose aerogels that were fabricated by dissolution in a mild NaOH/PEG solution, freeze thaw treatment, regeneration, and freeze drying. The as-prepared carbon aerogels were subsequently characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), nitrogen adsorption measurements, X-ray diffraction (XRD), Raman spectroscopy, and water contact angle (WCA) tests. The results showed that the carbon aerogels with pore diameters of 1-60 nm maintained interconnected three-dimensional (3D) network after the pyrolysis, and showed type-IV adsorption isotherm. The pyrolysis process leaded to the decomposition of oxygen-containing functional groups, the destruction of cellulose crystalline structure, and the formation of highly disordered amorphous graphite. Moreover, the carbon aerogels also had strong hydrophobicity, electrical conductivity and flame retardance, which held great potential in the fields of waterproof, electronic devices and fireproofing. (C) 2014 Elsevier Ltd. All rights reserved.
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