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Carbohydr Polym. 2015 Mar 15;118:115-8. doi: 10.1016/j.carbpol.2014.11.010. Epub 2014 Nov 16.

Fabrication of hydrophobic, electrically conductive and flame-resistant carbon aerogels by pyrolysis of regenerated cellulose aerogels.

Author information

1
Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
2
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China. Electronic address: luyun@criwi.org.cn.
3
School of Engineering, Zhejiang Agricultural and Forestry University, Lin'an 311300, China.
4
School of Engineering, Zhejiang Agricultural and Forestry University, Lin'an 311300, China. Electronic address: qfsun@nefu.edu.cn.
5
Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China. Electronic address: nefulijian@163.com.

Abstract

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.

KEYWORDS:

Aerogels; Carbon; Porous materials; Pyrolysis; Regenerated cellulose

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