Directional preparation of superhydrophobic magnetic CNF/PVA/MWCNT carbon aerogel. Issue 6 (26th April 2019)

• Record Type: Journal Article
• Authors: Li, Jiajia; Zhou, Lijie; Jiang, Xiangdong; Tan, Sicong; Chen, Peng; Zhou, Huan; Xu, Zhaoyang
• Is Part Of: IET nanobiotechnology. Volume 13:Issue 6(2019)
• Page Start: 565
• Page End: 570
• Publication Date: 2019-04-26
• Subjects: hydrophobicity -- compressive strength -- nanocomposites -- nanofabrication -- nanoparticles -- porous materials -- freezing -- porosity -- nanofibres -- water -- drying -- aerogels -- multi‐wall carbon nanotubes -- filled polymers; 3D interpenetrating porous structures -- m‐CPMCA -- cellulose‐based carbon aerogels -- magnetic response -- directional preparation -- superhydrophobic magnetic CNF/PVA/MWCNT carbon aerogel -- magnetic cellulose nanofibre/poly(vinyl alcohol)/multiwalled carbon nanotubes carbon aerogel -- aerogel -- freeze‐drying -- carbonisation -- direct immobilisation -- Fe3 O4 nanoparticle -- porosity -- compressive strength -- superhydrophobicity -- fire‐resistance -- combustion -- Fe3 O4 -- C; Biotechnology -- Periodicals; Nanotechnology -- Periodicals; 660.6
• DOI: 10.1049/iet-nbt.2018.5188
• Languages: English
• ISSNs: 1751-8741

Abstract

Abstract : Carbon aerogels have attracted considerable attention in basic research and for their potential applications in many fields. Here, the fabrication of a magnetic cellulose nanofibre (CNF)/poly(vinyl alcohol) (PVA)/multiwalled carbon nanotubes (MWCNT) carbon aerogel (m‐CPMCA) is reported using a simple freeze‐drying followed by a carbonisation process, and direct immobilisation of Fe3 O4 nanoparticle on the surface of aerogels. The obtained target aerogel has the characteristics of low density (0.098 g/cm 3 ), high porosity (>90%) and 3D interpenetrating porous structures. Furthermore, m‐CPMCA has a surprising compressive strength (about 0.35 MPa) which is obviously higher than many other cellulose‐based carbon aerogels. After Carbonization, m‐CPMCA exhibits superhydrophobicity, selective absorption for organic solvents and fire‐resistance. The m‐CPMCA also exhibited a magnetic response and can absorb oil on the water surface and can be actuated by a small magnet. More importantly, the m‐CPMCA could be recycled many times by combustion, which showed economic significance. To sum up, the authors believe that m‐CPMCA will become a very potential adsorbent for dealing with the increasingly serious problem of organic pollution.